{"title":"CNC Control Modules","description":"","products":[{"product_id":"fanuc-cnc-control-module-a02b-0299-b802-stock-0226-140","title":"GE Fanuc CNC Control Basic Unit A02B-0299-B802 24V DC","description":"\u003cp\u003eThe GE Fanuc A02B-0299-B802 is a Series 0i-TB CNC control basic unit, manufactured by Fanuc Ltd in Japan and dated 2004-10 per the rating plate. The nameplate identifies serial number E04X07230 and notes the unit was reconfigured as GE Fanuc CNC Express configuration 0ITB-MCU61173-001R00. This is the 2 slot basic chassis used as the foundation of the Fanuc Series 0i Model B platform, originally deployed in lathe applications under the 0i-TB designation. The housing carries two installed module positions labeled MAIN and I\/O, with the front panel exposing the standard 0i-B connector array including memory card slot, MDI, RS-232 serial, axis and spindle FSSB interfaces, and the DI\/DO connectors CB104 and CB106. A battery holder is provided for SRAM backup. The basic unit serves as the host enclosure for plug in PCB assemblies that define the system configuration, including the main CPU card, axis card, I\/O card, and any optional graphics, PMC, or RAM\/ROM cards specified by the original machine tool builder. Operates on 24V DC control input typical of the Fanuc 0i-B series. The A02B-0299-B802 is part number A02B-0299-B802 and was supplied in OEM configurations for Fanuc 0i-MB and 0i-TB control packages. Compatible with the Fanuc Series 0i Model A, B, C, and D platforms when correctly populated with matching plug in cards and software. Discontinued by the manufacturer and now sourced through the industrial surplus channel for CNC retrofit, repair, and spare inventory programs supporting legacy Fanuc 0i-B installations.\u003c\/p\u003e\n\u003cp\u003eStock # 0226-140\u003c\/p\u003e","brand":"FANUC","offers":[{"title":"Default Title","offer_id":48819089408240,"sku":"m00140","price":2299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/IMG_1463.jpg?v=1770833358"},{"product_id":"fanuc-ge-fanuc-cnc-control-module-a02b-0299-b802-stock-0226-141","title":"Fanuc CNC Control Basic Unit A02B-0299-B802 24 VDC","description":"\u003cp\u003eThe Fanuc A02B-0299-B802 is a Series 0i-TB CNC control basic unit manufactured in October 2004 by Fanuc Ltd. and supplied as a GE Fanuc CNC Express reconfigured assembly. The unit is identified with serial number E04X07230 and is marked on the secondary label as reconfigured as 0ITB-MCU61173-001R00. This is a 2 slot basic unit configuration intended for use on CNC lathes and turning centers running the Fanuc 0i-TB platform.\u003c\/p\u003e\n\u003cp\u003eThe assembly consists of a MAIN module and an I\/O module housed in the yellow Fanuc enclosure. The MAIN section provides the battery holder for memory backup along with multiple connector positions for axis, spindle, and FSSB servo interface cabling. The I\/O section provides the DI\/DO connector positions labeled CB104 (DI\/DO 1) and CB106 (DI\/DO 2). Status indicators and a battery alarm position are present on the front face of the MAIN module.\u003c\/p\u003e\n\u003cp\u003eThe A02B-0299-B802 is the basic unit chassis only. A complete operating system requires additional plug in PCBs selected by the machine tool builder, including the main CPU card, optional graphics, PMC, and RAM\/ROM cards, along with the matching LCD\/MDI display and software. The basic unit is part of the Fanuc Series 0i Model B family used on a wide range of 0i-TB equipped CNC lathes from the mid 2000s era.\u003c\/p\u003e\n\u003cp\u003eMarkings visible on the unit include the FANUC LTD label, CE marking, MADE IN JAPAN origin, and the GE Fanuc CNC Express reconfiguration sticker.\u003c\/p\u003e\n\u003cp\u003eStock # 0226-141\u003c\/p\u003e","brand":"FANUC (GE Fanuc)","offers":[{"title":"Default Title","offer_id":48819089473776,"sku":"m00141","price":2000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/IMG_1463_d1e079ba-6278-4a09-91fb-22b9f1bc46ea.jpg?v=1770833763"},{"product_id":"giddings-and-lewis-differential-encoder-interface-pcb-assembly-501-04758-00-0226-386","title":"Giddings and Lewis Differential Encoder Interface PCB Assembly 501-04758-00","description":"\u003cp\u003eThis Giddings and Lewis Differential Encoder Interface PCB assembly carries part number 501-04758-00, revision R1, with assembly number 502-03733-00, serial number E27314, and date code 100001. The board description \"Diff Encoder Interface\" is silkscreened directly on the green PCB in yellow text, consistent with Giddings and Lewis CNC control system conventions. This type of interface board is used in Giddings and Lewis CNC machine tool control systems to process and route differential encoder feedback signals, supporting closed-loop servo axis control. Giddings and Lewis, later operating under the Danaher Motion and Kollmorgen umbrella, produced CNC control systems for large-format machining centers, boring mills, and turning centers, where encoder interface boards such as this served as critical system components. The 502-03733-00 assembly number also appears as the reference number on a later Danaher Motion labeled unit of the same design, indicating cross-platform use across control generations. This board has been discontinued by the manufacturer and is offered as surplus. No voltage rating or additional electrical specifications are visible on the board or label. Buyers should verify compatibility using the part number and assembly number prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-386\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48833910833392,"sku":"m00386","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/69784521-A86B-46E3-9D0F-202CA657B949.jpg?v=1771295685"},{"product_id":"danaher-motion-differential-encoder-interface-module-m-1008-0342-0226-387","title":"Danaher Motion Differential Encoder Interface Module M.1008.0342","description":"\u003cp\u003eThis Danaher Motion M.1008.0342 Differential Encoder Interface module is a surplus PCB assembly manufactured by Danaher Motion (Kollmorgen). The part number M.1008.0342 is clearly marked on the label along with reference number 502-03733-00, serial number F37033, and date code 060901. The unit is identified as a Differential Encoder Interface, a component type used in CNC machine tool and servo motion control systems to condition and route differential encoder feedback signals between a servo drive and the machine control. Danaher Motion, operating under the Kollmorgen and Giddings and Lewis Motion Control umbrella, produced interface modules of this type for use in precision servo axis feedback circuits. The M.1008 series is associated with Danaher Motion control system assemblies. This module has been discontinued by the manufacturer. The item is offered as surplus and is sold as-is. No voltage rating or additional electrical specifications are visible on the label. Buyers should verify compatibility with their specific machine tool, servo drive, or CNC control system using the part number and reference number prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-387\u003c\/p\u003e","brand":"Danaher Motion","offers":[{"title":"Default Title","offer_id":48833914929392,"sku":"m00387","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/FB6EF2BE-2945-42B9-B837-8B1D3B619DF0.jpg?v=1771295844"},{"product_id":"giddings-lewis-llc-machine-control-board-m10083750-0226-414","title":"Giddings \u0026 Lewis LLC Machine Control Board M.1008.3750","description":"\u003cp\u003eGiddings \u0026amp; Lewis LLC M.1008.3750 machine control board labeled “Machine Control Fast.” The assembly is a large-format printed circuit board with edge card connectors and through-hole component layout. The board face marking identifies Giddings \u0026amp; Lewis and the control designation, with part number sticker M.1008.3750 and additional identifier 113403 visible on the assembly. This unit is designed for integration within Giddings \u0026amp; Lewis machine control systems and is configured as a CNC control module. The PCB features multiple populated and unpopulated component positions, plated through-holes, and card-edge contacts suitable for rack or chassis installation. No electrical rating is visible on the provided surfaces. Suitable for replacement, repair, or spare inventory where the exact part number M.1008.3750 is specified. Verify compatibility with your existing control system prior to installation\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-414\u003c\/p\u003e","brand":"REVIEW PRICING - Giddings \u0026 Lewis LLC","offers":[{"title":"Default Title","offer_id":48833996751088,"sku":"m00414","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/0F1194B0-9A84-4A8A-B4F5-019C79A2C927.jpg?v=1771298209"},{"product_id":"giddings-and-lewis-processor-module-501-03865-01-0226-417","title":"Giddings and Lewis Processor Module 501-03865-01","description":"\u003cp\u003eUsed in Giddings and Lewis CNC machining centers and horizontal boring mills, the Processor Module with part number 501-03865-01 and assembly number 502-03061 is a full-size backplane-mounted circuit board assembly designed for the G\u0026amp;L 8000-series and related CNC control systems. The board is populated with TTL logic ICs including 74LS-series gates, 26LS30 and 26LS32 line drivers and receivers, MC68661 and MC6861 communication ICs, and a 8288 bus controller. PCB silkscreen identifies termination selection jumpers for TX, RTS, and DTR signals, indicating RS-232 serial communication interface functionality integral to the processor function. The board carries a gold-finger edge connector along both sides for direct backplane installation into the G\u0026amp;L control chassis. Two units are available, both carrying the same part number 501-03865-01 and the same assembly designation 502-03061. One unit carries serial reference 078001 and the other 305000 as visible on the board edge. Construction is through-hole on a multilayer fiberglass PCB with gold-plated edge connectors. The Giddings and Lewis 8000-series control platform was used extensively in large-format horizontal boring mills, vertical turning centers, and flexible machining systems produced during the 1980s and early 1990s.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-417\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48835251601648,"sku":"m00417","price":179.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/23A9E3F5-EEA3-4511-9D47-6B184B64ABC9.jpg?v=1771340523"},{"product_id":"gould-electronics-communication-board-501-03854-01-0226-419","title":"Gould Electronics Communication Board 501-03854-01 m00419","description":"\u003cp\u003eUsed in Gould\/SEL and Encore real-time minicomputer systems, the Communication Board with part number 501-03854-01 and assembly reference 502-03063-01 is a large-format, through-hole populated PCB designed for serial and digital I\/O communication functions. This listing includes two matching boards. Silkscreen labeling on both boards identifies them as \"COMMUNICATION BD\" with revision and board test reference markings. The boards feature gold-edge card connectors on two sides, consistent with SELbus backplane integration used in Encore 32-series systems such as the 32\/77 and 32\/87. Component population includes HP 6N139 optocouplers, AM2841PC line receivers, DM74LS244N and DM74LS193N logic ICs, 80C98, DM74LS161AN counters, and F3341ADC devices, among others. Crystal oscillator circuitry is present at 4.912 MHz. Serial numbers 020700 and 129800 are visible on the two boards. This product line was originally manufactured by Systems Engineering Laboratories and later produced under the Gould Electronics brand. Legacy support for SEL\/Gould\/Encore 32-series systems continues to be provided by specialized third-party service organizations for applications in power plant simulation, flight simulation, and oil exploration sectors.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-419\u003c\/p\u003e","brand":"Gould Electronics","offers":[{"title":"Default Title","offer_id":48835306356976,"sku":"m00419","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/C3C92607-D442-4F0A-915E-75C3FFB5AD1A.jpg?v=1771342504"},{"product_id":"giddings-lewis-electronics-processor-module-501-03865-01-502-03061-01-0226-418-1","title":"Giddings \u0026 Lewis Electronics Processor Module 501-03865-01 \/ 502-03061-01","description":"\u003cp\u003eGiddings \u0026amp; Lewis Processor Module 501-03865-01 (secondary assembly 502-03061-01) represents a legacy CNC control component engineered for MPX series machine systems. This multi-layer green PCB incorporates industrial-grade TTL logic architecture with integrated clock generation (8284), bus control (8288), and dual serial communications capabilities via MC2661\/MC68661 controllers. The card-edge connector design facilitates standard rack-mount integration, while onboard line drivers (AM26LS30\/AM26LS32) and a precision 10 MHz crystal oscillator ensure reliable signal integrity in demanding manufacturing environments. Silkscreened test points and jumper-selectable termination options support field diagnostics and configuration flexibility. Ideal for CNC equipment restoration, maintenance, or parts inventory. Sold as-is surplus without functional verification.\u003c\/p\u003e\n\u003cp\u003eStock # 0226-418-1\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48835782803696,"sku":"m00418-1","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/7ED9B2D8-53D1-41F7-85BC-BF3B22AB8308.jpg?v=1772042123"},{"product_id":"mazak-cnc-control-board-ipm-200-0226-426","title":"Mazak CNC Control Board IPM-200","description":"\u003cp\u003eUsed in Mazak CNC machining and turning centers, the IPM-200 is a discontinued Mazatrol main control board identified by Mazak and industrial surplus suppliers as an M\/T Control BD. The board carries MPN IPM-200 and is silkscreened with the designation \"W\/1 CONTROLLER,\" with a board revision identifier of S829091B visible on the component side. The PCB features a multi-layer through-hole construction populated with Toshiba TC4508BP ICs, multiple DIP logic packages, a heat sink assembly, edge connectors on three sides, and an array of resistor networks. Alternate part number IPM200 is recognized in active US market listings. Mazak is a premium-tier CNC machine tool manufacturer, and legacy control boards such as this one are in demand as repair and replacement components for older Mazatrol-equipped machines. The IPM-200 is discontinued by the original manufacturer and is no longer available through new production channels, making surplus and used stock the primary source for end users maintaining compatible equipment. This board is offered as a surplus component removed from industrial service.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-426\u003c\/p\u003e","brand":"Mazak","offers":[{"title":"Default Title","offer_id":48835803021552,"sku":"m00426","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/2E19DB67-7542-4912-A89A-1990A8E48F3F.jpg?v=1771350867"},{"product_id":"yamazaki-mazak-controller-board-ipm-300-0226-427","title":"Yamazaki Mazak Controller Board IPM 300","description":"\u003cp\u003eThis listing is for a Yamazaki Mazak IPM 300 M\/T Controller board, as identified by the Mazak logo and IPM 300 M\/T CONTROLLER silkscreen printed along the right edge of the board. Connector designations CN500, CN502, CN503, and CN504 are visible along the left and lower edges of the board.\u003c\/p\u003e\n\n\u003cp\u003ePopulated components include multiple Toshiba TC4508BP dual 4-bit latch ICs at positions N47 through N51 and N56, a large black finned aluminum heat sink in the upper section, an array of green epoxy-coated toroidal inductors, red LED indicators along the upper left edge, and a dense population of logic ICs and passive components throughout. The board architecture is consistent with Mazak CNC machine tool I\/O and machine controller board designs of the late 1980s generation.\u003c\/p\u003e\n\n\u003cp\u003eYamazaki Mazak is a globally recognized Japanese manufacturer of CNC machine tools and machining centers. This board is suited for use as a replacement or spare in compatible Mazak CNC machine tool control systems utilizing the IPM 300 control platform. Compatibility should be verified against OEM documentation and the specific machine configuration prior to installation. A complete part number should be confirmed via physical inspection of the board before purchase. Unit is offered as removed and has not been tested or recertified.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-427\u003c\/p\u003e","brand":"Mazak (Yamazaki Mazak)","offers":[{"title":"Default Title","offer_id":48835808100592,"sku":"m00427","price":334.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/954209CF-9DA8-47EF-8453-0F2E70B8ACFC.jpg?v=1771351006"},{"product_id":"bridgeport-servo-control-board-501-04303-02-0226-458","title":"Bridgeport Servo Control Board 501-04303-02","description":"\u003cp\u003eUsed in Bridgeport Series II CNC milling machines, the Bridgeport Servo Control Board carries OEM part number 501-04303-02, with assembly reference 502-03417-02, REV2, dated 1\/89. The board is labeled \"SERVO CONTROL\" directly on the PCB silkscreen and is associated with the SBX3 designation common to Bridgeport Interact platform controls. The board features a DAC811AH digital-to-analog converter, a dense population of HCMOS logic ICs including MM74HC and MC74HC series devices from multiple manufacturers, and NEC memory components visible on the component side. Multiple edge connectors are present along the bottom and right edges for integration into the machine control backplane. The reverse side shows a multilayer through-hole design with gold-plated edge fingers. This is a large-format board measuring approximately 14 by 10 inches. Serial number A80775 is visible on the barcode label. The board dates to January 1989 and is consistent with the Bridgeport Series II Interact CNC control architecture of that period. MPN 501-04303-02 is the primary OEM identifier. Compatible machine platforms and exact system requirements should be verified against Bridgeport Interact Series II service documentation prior to installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-458\u003c\/p\u003e","brand":"Bridgeport","offers":[{"title":"Default Title","offer_id":48840289353968,"sku":"m00458","price":2299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/E8ACBC60-69EB-4E44-AE1B-6FDB16DECB07.jpg?v=1771443306"},{"product_id":"giddings-lewis-communication-board-501-03854-01-502-03063-01-0226-503","title":"Giddings \u0026 Lewis Communication Board 501-03854-01 \/ 502-03063-01","description":"\u003cp\u003eUsed in Giddings \u0026amp; Lewis CNC machining center control systems, this Communication Board carries part number 501-03854-01 with secondary assembly number 502-03063-01. The board is branded G\u0026amp;L Electronics and features a dense double-sided PCB populated with optoisolator arrays (A 6N139 series), logic ICs including LS244, LS161, LS193, LS340, LS138, LS602, and 3341 series devices, as well as IDT 72401 FIFOs and MC68B661PB serial communications controllers. Connector designations silkscreened on the board include Digital I\/O Conn A Port, Serial Comm Port B, and Serial Conn C, indicating this board manages serial and digital I\/O communication routing within the CNC control rack. A crystal oscillator marked 4.912 MHz is present, providing the communications clock reference. Board revision is RA 12\/84, and serial number D04542 is visible. The second assembly number 502-03063-01 is also clearly labeled in the board header silkscreen. This is a legacy board intended for use in G\u0026amp;L CNC control systems requiring this specific communication interface. Compatible systems include Giddings \u0026amp; Lewis CNC controls of the era associated with this board generation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-503\u003c\/p\u003e","brand":"Giddings \u0026 Lewis","offers":[{"title":"Default Title","offer_id":48856348426480,"sku":"m00503","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/0F51A9C2-88C2-47CA-9DEF-0EC071EFD11C.jpg?v=1771619536"},{"product_id":"gould-electronics-communication-board-501-03854-01-0226-504","title":"Gould Electronics Communication Board 501-03854-01","description":"\u003cp\u003eUsed in CNC machine tool control systems manufactured by Gould Electronics, the Communication Board part number 501-03854-01 is a double-sided printed circuit board assembly carrying secondary assembly number 502-03063 (partial). The board is silkscreen-labeled \"COMMUNICATION BD RN5-2\" and carries a revision date of RA 12\/84, indicating manufacture in December 1984. The assembly consists of two interconnected PCB sections joined along a shared edge connector rail, with gold-plated edge connectors on three sides for rack or backplane integration. Visible I\/O designations on the component side silkscreen include labels for Serial Port, Digital I\/O, Communication Port, and I\/O Test points. The board is populated with TTL logic ICs including 74LS series devices, Motorola MC68661PB EPCI communication ICs, and a 4.912 MHz crystal oscillator. Component-side silkscreen designators include IC positions numbered from IC-1 through IC-92. The Gould Electronics logo is visible on the component side. This board is intended for use as a replacement or spare for Gould Electronics CNC control systems utilizing this communication architecture. MPN 501-03854-01 is the primary OEM-assigned identifier as marked on the board silkscreen.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-504\u003c\/p\u003e","brand":"Gould Electronics","offers":[{"title":"Default Title","offer_id":48856355635440,"sku":"m00504","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/717B728F-96D5-488C-89DC-906C1A291BA5.jpg?v=1771619894"},{"product_id":"giddings-and-lewis-central-service-module-501-04304-00-0226-511","title":"Giddings and Lewis Central Service Module 501-04304-00","description":"\u003cp\u003eThis Giddings and Lewis Central Service Module, part number 501-04304-00 (OEM catalog equivalent 502-03418-00, M.1017.6011 series, REV-2), is a large-format CNC control processor board designed for use in Giddings and Lewis machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath CNC platforms. The board is densely populated with through-hole ICs, memory arrays, resistor networks, and discrete components across a green FR4 substrate. Two Ericsson PKA 2231 P DC\/DC power modules are mounted onboard, providing regulated +5V, +12V, and -12V outputs. Three Panasonic lithium backup batteries are installed to maintain CMOS memory retention when main power is removed. Additional sub-boards visible include memory modules 502-52976-00 and 502-52977-00. An RTC (real-time clock) IC is present at position U63. Blue edge connectors and multiple internal bus connectors are visible. Serialized labels 169404 and 449604 are present on the board. The Central Service Module serves as a core computational and service resource within the G\u0026amp;L CNC control rack, managing system timing, memory, and inter-module communication. With the G\u0026amp;L 8000 control platform at end-of-life status per Fives, replacement central service modules are increasingly scarce and in demand by facilities maintaining legacy Giddings and Lewis horizontal boring mills and vertical turning centers.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-511\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856405901552,"sku":"m00511","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/CA1E9F65-1F47-462F-B8D9-DA2EEE0BF01B.jpg?v=1771622160"},{"product_id":"giddings-and-lewis-eia-interface-board-502-02804-50-0226-512","title":"Giddings and Lewis EIA Interface Board 502-02804-50 m00512","description":"\u003cp\u003eThis Giddings and Lewis EIA Interface board, part number 502-02804-50 (assembly number 501-03168-00), is a large-format CNC control circuit board designed for use in Giddings and Lewis machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath CNC platforms. The board features dual gold-finger edge connectors on both the left and right edges for backplane installation, and is densely populated with through-hole ICs, resistor networks, red capacitors, and discrete components on a green FR4 substrate. A 40-pin DIP processor or logic IC is mounted at center, accompanied by a 1.843200 MHz crystal oscillator for clocking. Twelve test point locations (TP2 through TP12) are labeled across the board surface. Seven vertical white trace indicator lines are silkscreened for layout reference. The EIA designation indicates this board handles EIA-standard serial communication or digitizing interface functions within the CNC control rack. A serial number label area is present at the lower right edge. The board carries an orientation marking of UP with an arrow for correct rack installation. With the G\u0026amp;L 8000 control platform at end-of-life status per Fives, replacement interface boards such as this one are increasingly scarce for facilities maintaining legacy Giddings and Lewis horizontal boring mills, vertical turning centers, and other G\u0026amp;L CNC equipment. No voltage rating was confirmed from the provided photos.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-512\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856429101296,"sku":"m00512","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/F2A6013E-6160-41EB-96D4-BAEEB9EE286C.jpg?v=1771622839"},{"product_id":"giddings-and-lewis-eia-interface-board-502-02804-50-0226-513","title":"Giddings and Lewis EIA Interface Board 502-02804-50","description":"\u003cp\u003eThis Giddings and Lewis EIA Interface board, part number 502-02804-50 (assembly number 501-03168-00, serial number 257), is a large-format CNC control circuit board designed for use in Giddings and Lewis machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath CNC platforms. The board features dual gold-finger edge connectors on both the left and right edges for backplane installation, and is populated throughout with through-hole ICs, resistor networks, red capacitors, and discrete components on a green FR4 substrate. A 40-pin DIP processor or logic IC is mounted at center lower, accompanied by a 1.843200 MHz crystal oscillator. Seven vertical white trace indicator lines are silkscreened for layout reference, and multiple test point locations are labeled across the board surface. Two coaxial connectors are visible at lower right. The EIA designation indicates this board handles EIA-standard serial communication or digitizing interface functions within the CNC control rack. The UP orientation arrow with directional marking is cast into the board housing for correct rack installation. With the G\u0026amp;L 8000 control platform at end-of-life status per Fives, replacement EIA Interface boards such as this one are increasingly scarce for facilities maintaining legacy Giddings and Lewis horizontal boring mills, vertical turning centers, and other G\u0026amp;L CNC equipment. No voltage rating was confirmed from the provided photos.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-513\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856430739696,"sku":"m00513","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/6D788A4C-A885-41CD-B949-A6CD7B7FF26B.jpg?v=1771623053"},{"product_id":"giddings-and-lewis-color-graphics-sbx-board-502-03504-00-0226-514","title":"Giddings and Lewis Color Graphics SBX Board 502-03504-00","description":"\u003cp\u003eThis Giddings and Lewis Color Graphics SBX board, part number 502-03504-00 (assembly number 501-04478-00, REV-1, dated 11\/87, serial D04220), is a CNC operator display graphics sub-board designed for use in Giddings and Lewis CNC machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath platforms. The board is built around a Hitachi HD63484CP8 advanced CRT controller in a large QFP package, supported by HD63485CP32 and HD63486CP32 graphics co-processor ICs for color display generation. A DALE XO-43B 25.000 MHz crystal oscillator provides the system clock. An onboard EPROM at position U4 is labeled 502-53756-00 \/ 89986-00. Additional ICs include a KM41C464Z-10 DRAM and SN74HC541N buffer. FAIL and PASS status LEDs with associated fuse holders (550-0405 and 550-0205) provide onboard self-test indication. A 50-pin and 40-pin ribbon cable connector are present at the top edge for sub-board interconnection. Construction is mixed through-hole and surface mount on a green FR4 substrate with yellow SMD capacitors throughout. The Color Graphics SBX board provides the color video output function for the G\u0026amp;L CNC operator pendant display. With the G\u0026amp;L 8000 control platform at end-of-life status per Fives, color graphics boards of this type are increasingly scarce for facilities maintaining legacy Giddings and Lewis horizontal boring mills and vertical turning centers.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-514\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856432836848,"sku":"m00514","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/B02D918F-E7B2-4C45-878F-9BBEE42BAE5D.jpg?v=1771623118"},{"product_id":"giddings-and-lewis-operator-station-board-502-03419-00-0226-515","title":"Giddings and Lewis Operator Station Board 502-03419-00","description":"\u003cp\u003eThis Giddings and Lewis Operator Station Board, part number 502-03419-00 (OEM equivalent M.1017.6227-00, serial 467403, dated 5\/88, additional label 350603), is a large-format CNC operator interface and control board designed for use in Giddings and Lewis CNC machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath platforms. The board hosts an integrated SBX sub-board (502-52941-00 \/ 89169-00) mounted in the center section via edge connectors, providing expanded operator station processing capability. Three Vitec 54P2892 DC\/DC power converter modules are mounted onboard to supply regulated voltages. EPROM arrays at upper right are labeled 502-51447-00 and 502-51449-00. A PLD device is present at PLD1. Power input connectors J13, J14, and J15 provide +5V, +12V, -12V, and GND connections. A relay K2 and multiple blue ribbon cable connectors are present for operator panel interfacing. The board is densely populated with through-hole and surface mount ICs, yellow SMD capacitors, resistor networks, and discrete components on a green FR4 substrate throughout. Serial labels 230600 are visible on installed memory devices. The Operator Station Board serves as the primary interface between the machine operator pendant and the G\u0026amp;L CNC control rack. With the G\u0026amp;L 8000 control platform at end-of-life status per Fives, operator station boards of this type are among the most sought-after replacement components for facilities maintaining legacy Giddings and Lewis horizontal boring mills and vertical turning centers.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-515\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856452858096,"sku":"m00515","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/58FC4E96-7023-4F5D-ACE1-4AC3B903EC60.jpg?v=1771623820"},{"product_id":"giddings-and-lewis-central-service-module-502-03418-00-0226-516","title":"Giddings and Lewis Central Service Module 502-03418-00","description":"\u003cp\u003eThis Giddings and Lewis Central Service Module, part number 502-03418-00 (assembly number 501-04304-00, REV-2, dated 11.98), is a large-format CNC control processor board designed for use in Giddings and Lewis machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath CNC platforms. This later date code example features an expanded DRAM memory array populated with KM6323568LP devices at positions U3 through U18, providing increased on-board memory capacity relative to earlier revisions. Three large yellow electrolytic capacitors provide bulk power filtering. An RTC real-time clock IC is present at position U63, and a DALE XO-43B 10.000 MHz crystal oscillator provides system timing at Y1. Memory sub-board EPROMs are labeled 502-52974-00 \/ 89202-00, 502-52975-00 \/ 89203-00, 502-52976-00 \/ 89204-00, and 502-52977-00 \/ 89205-00. SBX1 and SBX2 expansion connectors and multiple blue ribbon cable connectors are present for sub-board and inter-module interfacing. Voltage test points for +5V, +12V, and -12V are silkscreened on the left edge. The board is densely populated with through-hole and surface mount ICs and yellow SMD capacitors throughout on a green FR4 substrate. The Central Service Module manages system timing, memory, and inter-module communication within the G\u0026amp;L CNC control rack. With the G\u0026amp;L 8000 platform at end-of-life status per Fives, replacement central service modules are increasingly scarce for facilities maintaining legacy Giddings and Lewis horizontal boring mills and vertical turning centers.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-516\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856455839984,"sku":"m00516","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/CA3AD1D7-AA76-4B6C-8BCB-C59C9A30DA2B.jpg?v=1771624066"},{"product_id":"data-products-core-memories-inc-core-memory-plane-board-717510-2d-0226-517","title":"Data Products Core Memories Inc Core Memory Plane Board 717510-2D m00517","description":"\u003cp\u003eThis Data Products Core Memories Inc ferrite core memory plane board, part number 401-50326-00 (assembly 717510-2D, serial HA 366, PWB 717166-1D), is a large-format magnetic core memory array providing 32K x 18 bit capacity. The board was assembled in Hong Kong and bears the DPHK 9 Final inspection stamp. The solder side reveals four ferrite core array quadrants arranged in a characteristic grid pattern across the center field of the board, with dense edge connector circuitry on all four sides for full-edge backplane interfacing. This type of ferrite core memory plane was used in minicomputers and industrial CNC control systems during the 1970s and into the early 1980s, before being superseded by semiconductor RAM. Ferrite core memory is inherently non-volatile, retaining stored data without power, and was widely valued for its reliability in industrial environments. This board is of significant interest to vintage computer collectors, computer history museums, and researchers. Data Products Core Memories Inc supplied core memory assemblies for a range of minicomputer and industrial control platforms. The board is in used condition as removed; no functional testing has been performed.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-517\u003c\/p\u003e","brand":"Data Products Core Memories Inc","offers":[{"title":"Default Title","offer_id":48856457085168,"sku":"m00517","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/A15E93CE-2E61-416D-9521-2F59EB0000F1.jpg?v=1771624379"},{"product_id":"giddings-lewis-dual-servo-sbx-board-501-04309-01-0326-519","title":"Giddings \u0026 Lewis Dual Servo SBX Board 501-04309-01","description":"\u003cp\u003eThe PCB assembly marked 501-04309-01 is a Dual Servo SBX board, revision 1, dated 3\/88 per the silkscreen on the component side. A secondary PCB identifier, 502-03423-01, is also printed on the board and may represent an assembly or schematic reference number. The board is a full-length, multi-layer design populated with a dense array of through-hole integrated circuits including Harris CMOS logic, National Semiconductor HC-series logic, and a DAC811AH digital-to-analog converter. A DALE crystal oscillator marked XO-43B at 16.384 MHz is mounted on the component side, and a gold-lidded ceramic IC package is visible near the oscillator. The board features a card-edge connector on one end and a 40-pin ribbon cable connector populated with a blue IDC header. The designation \"DUAL SERVO SBX\" indicates the board is intended for dual-axis servo interface functions within a CNC or industrial automation control system. The assembly number 501-04309-01 is the primary market-recognized identifier for this board. Revision 1 is silkscreened directly on the PCB. The manufacturer is not identified by visible logo or marking on either side of the board.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0326-519\u003c\/p\u003e","brand":"Giddings \u0026 Lewis","offers":[{"title":"Default Title","offer_id":48856676172016,"sku":"m00519","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/07978DE8-BBF4-4BFF-9335-FFDECD38ABE3.jpg?v=1771624428"},{"product_id":"giddings-and-lewis-dual-servo-sbx-board-502-03423-01-0226-518","title":"Giddings and Lewis Dual Servo SBX Board 502-03423-01 m00518","description":"\u003cp\u003eThis Giddings and Lewis Dual Servo SBX board, part number 502-03423-01 (assembly number 501-04309-01, REV-1, dated 3\/88), is a CNC servo control sub-board designed for use in Giddings and Lewis machine control systems including the G\u0026amp;L 8000 and 8000B NumeriPath CNC platforms. The board provides dual-axis analog servo command output and feedback processing for CNC axis drives. Key components include a Burr Brown DAC811AH precision 12-bit digital-to-analog converter for servo command signal generation, a DALE XO-43B 16.384 MHz crystal oscillator, an LM339N quad comparator, a DG212CJ precision analog switch, Maxim ICs, and an IM6116CPI static RAM. Logic devices throughout include MC74HC and MM74HC series ICs. A sub-board at position N1 is labeled 502-52984-00 \/ 89212-00. PASS and FAIL status LEDs provide onboard diagnostic indication, and STR and ZERO test points are present for calibration. The board is populated on a gold-tinted FR4 substrate with yellow SMD capacitors and resistor networks throughout. The Dual Servo SBX interfaces with the main CNC control board to deliver precise analog velocity or torque commands to two servo drives simultaneously. With the G\u0026amp;L 8000 platform at end-of-life status per Fives, servo SBX boards are actively sought by facilities maintaining legacy Giddings and Lewis horizontal boring mills and vertical turning centers.\u003c\/p\u003e\n\u003cp\u003eStock # 0226-518\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856688525552,"sku":"m00518","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/7F6D7102-5E4B-4D78-8343-D0D231B6573B.jpg?v=1771624722"},{"product_id":"giddings-lewis-servo-interface-pcb-assembly-501-03882-00-502-03092-00-0226-521","title":"Giddings \u0026 Lewis Servo Interface PCB Assembly 501-03882-00 \u0026 502-03092-00 m00521","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo interface PCB assembly bearing part numbers 501-03882-00 and 502-03092-00, silkscreened directly on the board. The Giddings \u0026amp; Lewis brand logo is printed on the board face. Date code RC 5\/84 is visible on the silkscreen. The board is configured with two servo channels, labeled SIG and FDBK, with signal groups including COS, SIN, IND, RES, DRV CMD, and GND connections along the left edge via a gold-edge card connector. A second gold-edge card connector labeled MACH CONN is located along the right edge with numbered positions up to position 24. Two TO-3 package power transistors marked S8624 and LH0101CK are mounted on heatsinks and are visible on the board face. Active ICs include LMB652, AM0640 (x2), and R3162 (x2). Precision resistor networks include Dale RS-7 series 0.05% tolerance resistors. Trimmer potentiometers labeled GAIN, BAL, VR1-1, and VR1-2 are present and accessible for adjustment. Multiple test points are distributed across the board face. The board uses through-hole construction throughout. This assembly is consistent with resolver-based analog servo interface applications used in Giddings \u0026amp; Lewis CNC machine tool systems. Physical condition shows signs of prior installation and use. Revision code 5\/84 suggests this board is from the Giddings \u0026amp; Lewis legacy CNC product line.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-521\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856692785392,"sku":"m00521","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/8C7AD6F7-C171-4225-928A-E1076E2F6E25.jpg?v=1771624972"},{"product_id":"giddings-lewis-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-523","title":"Giddings \u0026 Lewis Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00 m00523","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. A gold-edge card connector labeled BOARD connects along the bottom left, and a second connector labeled P1 is located along the right edge with numbered positions to 47. A Burr-Brown DAC80Z-CBI-V D\/A converter IC is visible on the board face. A 16.384 MHz crystal oscillator Y-1 is present. The board is densely populated with National Semiconductor logic ICs including DM74LS174N, DM74LS244N, DM74LS160AN, DM74LS373N, DM74LS373AN, DM74LS240N, DM74LS138N, DM74LS123N, DM74LS20N, DM74LS164N, DM74LS73AV, DM7406N, and MC74F32ND5 and MC74F174NDS fast logic devices. Intersil IH6108CPE analog switches and TL082CP dual op-amps are present at multiple positions. IC positions include IC-1 through IC-86 as visible on the silkscreen. Test points TP1 through TP3 and trimmer potentiometer COS VR1 are accessible on the board face. Physical condition shows signs of prior installation and use. This board is consistent with multi-axis analog servo control applications in Giddings \u0026amp; Lewis legacy CNC machine tool systems.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-523\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856699371760,"sku":"m00523","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/CB6B4C15-1032-4113-ACBF-98EFA0544C27.jpg?v=1771625125"},{"product_id":"giddings-lewis-processor-module-pcb-assembly-501-03865-01-502-03061-02-0226-524","title":"Giddings \u0026 Lewis Processor Module PCB Assembly 501-03865-01 \u0026 502-03061-02","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics processor module PCB assembly bearing part numbers 501-03865-01 and 502-03061-02, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, multi-layer through-hole assembly designed for use as a CPU processor module in a Giddings \u0026amp; Lewis CNC control system. Visible active ICs include a gold-lid Intel processor at IC-14, Intel 8284 clock generator, Intel 8288 bus controller, NEC D8259AC-2 programmable interrupt controller, MC2661PB and MC68661PB serial communications ICs, and Motorola MC68B50P. Logic ICs include SN75188N, AM26LS30PCB, AM26LS32PC-B, SN74LS00N, SN74LS04M, SN74LS640N, SN74LS245N, SN74LS240N, SN74LS373N, SN74LS138N, SN74LS273N, SN74LS244N, SN79LS32N, DM74LS174N, DM74LS244N, DM74LS160AN, DM74LS32H, and DM74LS20N among others. EPROMs and RAM ICs are present at multiple positions including 502-57554-00, 502-57555-00, 502-03333-01, and 502-03354-01. Board sections visible include TERMINATION SELECTION jumpers for TX, RTS, and DTR on channels A and B, ASYNC interface header J1, EXPANSION BUS connector CONN B, and gold-edge card connector P1. Test points and trimmer potentiometer V3-1 are accessible on the board. Physical condition shows signs of prior installation and use.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-524\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856709923056,"sku":"m00524","price":799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/6F792CEC-A00B-4B91-889A-B8DA593D9775.jpg?v=1771625528"},{"product_id":"giddings-lewis-ad-fast-input-pcb-assembly-501-04171-00-502-03325-00-0226-525","title":"Giddings \u0026 Lewis A\/D \u0026 Fast Input PCB Assembly 501-04171-00 \u0026 502-03325-00","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics A\/D and fast input PCB assembly bearing part numbers 501-04171-00 and 502-03325-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole and mixed-technology assembly. The primary analog data acquisition device is a Burr-Brown SDM857JG Data Acquisition System IC in an 80-pin package, mounted at the center of the board. An onboard DC\/DC power supply module by Computer Products Stevens-Arnold is installed and labeled A05015\/150, providing regulated internal supply voltages. Board silkscreen markings indicate +12V and -12V supply rails. Connector sections include CONN 1 through CONN 5 along the left edge for A\/D channel inputs, a FAST INPUT section along the lower left, and gold-edge card connectors labeled CONN 2, BOARD, and P1 CONN along the board edges. Trimmer potentiometers VR1-1, VR2-1, and associated GAIN and OFFSET adjustments are accessible on the board face. Logic ICs include MM74HC244N, SN74LS640N, MM74HC00N, MM74HC138N, MM74HC540N, MM74HC688N, MM74HC73N, MM74HC541N, MM74HC08N, MM74HC04N, MM74HC164N, DM74LS240AN, and SN74LS145N. An EPROM at IC-32 is marked 502-70207-00 \/ 60228-00 \/ 70209. Test points including GRD TP9 and labeled power test points are present. Physical condition shows signs of prior installation and use. Date code on the power supply module indicates 8848, placing manufacture in late 1988.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-525\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856747671792,"sku":"m00525","price":750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/871024CF-7376-4999-AC07-84A114F8698A.jpg?v=1771626484"},{"product_id":"giddings-lewis-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-526","title":"Giddings \u0026 Lewis Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00 m00526","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. Gold-edge card connectors labeled BOARD and P1 are located along the board edges with numbered positions to 85 and 39 respectively. A Burr-Brown AMNDAC80-CBI-V D\/A converter IC is visible on the board face. Active ICs include Intersil IH6108CPE analog switches with K8637 date codes at multiple positions, Texas Instruments TL082CP dual op-amps, NE5332 and NE5532P precision op-amps at IC-32 and IC-50 positions, and Motorola MC74F32NDS and MC74F174NDS fast logic. Logic ICs include DM74LS174N, SN74LS244N, DM74LS160AN, SN74LS161AN, DM74LS153N, DM74LS374N, SN74LS240N, SN74LS138N, SN74LS123N, SN74LS20N, DM74LS08N, SP8540A, DM74LS164N, and DM7406N. Trimmer potentiometers VR1 with COS and 5K markings and 20K trimmers are accessible on the board. Test points TP1, TP2, and GND TP9 are present. Board sections include 4KHZ COS, 4KHZ SIN, and BOARD TEST labels consistent with resolver-based servo feedback applications. Physical condition shows signs of prior installation and use. This board is consistent with multi-axis analog servo control in Giddings \u0026amp; Lewis legacy CNC machine tool systems.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-526\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856752980208,"sku":"m00526","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/403393FF-739C-4F37-965C-C63D4D614A89.jpg?v=1771626844"},{"product_id":"giddings-lewis-electronics-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-527","title":"Giddings \u0026 Lewis Electronics Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00 m00527","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. Gold-edge card connectors labeled BOARD and P1 are located along the board edges. A Burr-Brown DAC80P-CBI-V D\/A converter IC is visible on the board face. A 16.384 MHz crystal oscillator Y-1 is present. Primary analog switch ICs are Maxim DG503ACJ and DG508ACJ at IC-1 and IC-2 positions with 8819 date codes, representing a later production revision compared to Intersil IH6108CPE-populated variants of the same board. Texas Instruments TL082CP dual op-amps are present at multiple positions. NE5532 and NE5532P precision op-amps appear at IC-12, IC-32, IC-54, IC-76, and IC-82 positions. Linear Technology LT1055 precision op-amps are present at IC-69, IC-82, and IC-84. Logic ICs include SP8818A DM74LS174N, SP8812A DM74LS244N, SN74LS160AN, DM74LS161AN, SN74LS640N, SN74LS240N, DM74LS138N, DM74LS373N, SP8730A DM74LS123N, SN74LS04N, DM74LS20N, DM74LS08N, SP8552 DM74LS164N, SP8736A DM74LS73AN, SN74LS682N, and DM7406N among others. MC74F32NDS and MC74F174NDS fast logic ICs are present. Test points TP1, TP2, and GND TP9 are accessible. Physical condition shows signs of prior installation and use.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-527\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856761368816,"sku":"m00527","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/2A975B11-D403-4390-BE5D-832DDF350FFF.jpg?v=1771627234"},{"product_id":"giddings-lewis-electronics-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-528","title":"Giddings \u0026 Lewis Electronics Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. Gold-edge card connectors labeled BOARD and P1 are located along the board edges with numbered positions to 85 and 39 respectively. A Burr-Brown AMNDAC80-CBI-V D\/A converter IC is visible on the board. A 16.384 MHz crystal oscillator Y-1 is present. Primary analog switch ICs are Intersil IH6108CPE at IC-1, IC-2, IC-44, IC-64, IC-74, IC-79, and additional positions with K8701 date codes. Motorola TL082CP and TL080CP dual op-amps are present at multiple positions. NE5532 and NE5532P precision op-amps appear at IC-32, IC-54, and IC-76. Linear Technology LT1055 op-amps are present at IC-77, IC-82, and IC-84. Logic ICs include SP8652A DM74LS174N, SP8712A DM74LS244N, SN74LS160AN, DM74LS161AN, SN74LS640N, SN74LS240N, SN74LS138N, SN74LS123N, SN74LS04N, DM74LS08N, SP8652A DM74LS164N, SP8652A DM74LS73AN, SN74LS682N, PB504A DM74LS20N, and DM7406N among others. MC74F32NDS and MC74F174NDS fast logic ICs are present with 8625A and 8552 date codes. Test points TP1, TP2, GND TP9, and D\/A OUT TP3 are accessible on the board face. Physical condition shows signs of prior installation and use.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-528\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856762122480,"sku":"m00528","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/CB05C7B6-F208-490E-8261-822DB4AC4504.jpg?v=1771627307"},{"product_id":"giddings-lewis-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-529","title":"Giddings \u0026 Lewis Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00 m00529","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. Gold-edge card connectors labeled BOARD and P1 are located along the board edges. A Burr-Brown AMNDAC80-CB1-V D\/A converter IC is visible on the board. Primary analog multiplexer ICs are Texas Instruments DG508ACJ at IC-1, IC-2, IC-44, IC-64, IC-74, IC-79, and additional positions, with T8730 and T8712 date codes, representing a production variant substituting TI DG508ACJ devices in place of the Intersil IH6108CPE used in earlier revisions. Texas Instruments TL082CP dual op-amps branded 722 X B are present at multiple positions. NE5532 and NE5532P precision op-amps appear at IC-32, IC-54, and IC-76. Linear Technology LT1055 op-amps are present at IC-69, IC-77, and IC-82. Logic ICs include P8730A DM74LS174N, P8730A DM74LS244N, SN74LS640N, SN74LS240N, SN74LS138N, SN74LS123N, SN74LS04N, DM74LS08N, SP8730A DM74LS73AN, SN74LS682N, PB504A DM74LS20N, SP8632A DM74LS164N, and DM7406N among others. MC74F32NDS and MC74F174NDS fast logic ICs are present. Test points TP1, TP2, and GND TP9 are accessible. Physical condition shows signs of prior installation and use.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-529\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856762941680,"sku":"m00529","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/057E71D6-26D7-49E5-B7B9-70F0B78B4000.jpg?v=1771627363"},{"product_id":"giddings-lewis-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-530","title":"Giddings \u0026 Lewis Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00 m00530","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. Gold-edge card connectors labeled BOARD and P1 are located along the board edges with numbered positions to 85 and 39 respectively. A Burr-Brown DAC80Z-CBI-V D\/A converter IC is installed in a labeled D\/A CONVERTER socket on the board face. Primary analog switch ICs are Intersil IH6108CPE at IC-1, IC-2, IC-44, IC-64, IC-74, IC-79, and additional positions with 8431 date codes, representing an early production variant of this board. TL082CP dual op-amps branded 445 X P3 are present at multiple positions. NE5532 precision op-amps appear at IC-32 and IC-54 positions. Logic ICs include P8440A DM74LS174N, P8440A DM74LS244N, SN74LS640N, SN74LS240N, SN74LS138N, SN74LS123N, SN74LS04N, DM74LS08N, SP8404A DM74LS20N, SP8452A DM74LS164N, and DM7406N among others. MC74F32N and MC74F174N fast logic ICs are present with 8423 and 8427 date codes. Test points TP1, TP2, TP9 GND, and BOARD TEST labels are accessible on the board. Physical condition shows signs of prior installation and use. IC date codes of 8431 place manufacture in the first quarter of 1984.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-530\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856764514544,"sku":"m00530","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/35CDD369-2540-4156-9AED-ECE0C4AC426A.jpg?v=1771627437"},{"product_id":"giddings-lewis-servo-board-pcb-assembly-501-03852-00-502-03055-00-0226-531","title":"Giddings \u0026 Lewis Servo Board PCB Assembly 501-03852-00 \u0026 502-03055-00","description":"\u003cp\u003eThis is a used Giddings \u0026amp; Lewis Electronics servo board PCB assembly bearing part numbers 501-03852-00 and 502-03055-00, silkscreened directly on the board face. The Giddings \u0026amp; Lewis brand logo is printed on the board. Board serial number 41 8408 is visible on the silkscreen. The board is a large-format, high-density through-hole assembly configured for four independent servo channels labeled SERVO CHAN A, B, C, and D along the left edge. Gold-edge card connectors labeled BOARD and P1 are located along the board edges. A DAC-80-CBI-V D\/A converter IC in a gold-lid ceramic package with a 9984 date code is present, indicating a later component than surrounding ICs and suggesting possible field replacement. A 16.384 MHz crystal oscillator Y-1 is present. Primary analog switch ICs are Intersil IH6108CPE at IC-1, IC-2, IC-44, IC-64, IC-74, IC-79, and additional positions with 8431 date codes. Motorola TL082CDS dual op-amps branded 34002DS with K8622 date codes are present at multiple IC positions. NE5532 and NE5553 precision op-amps appear at IC-32, IC-54, and IC-76. Logic ICs include SP8516A DM74LS174N, SP8516A DM74LS244N, SN74LS640N, SN74LS240N, SN74LS138N, SN74LS123N, SN74LS04N, PB524A DM74LS08N, SP8516A DM74LS174N, PB444A DM74LS73AN, PB620A DM74LS20N, PB448AA DM74LS164N, and DM7406N among others. MC74F32NDS and MC74F174NDS fast logic ICs are present with 8623 and 8552 date codes. Test points TP1, TP2, GND TP9, and D\/A OUT TP3 are accessible. Physical condition shows signs of prior installation and use.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-531\u003c\/p\u003e","brand":"Giddings \u0026 Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856765923568,"sku":"m00531","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/20F862BD-F7C9-4171-A438-BA00817DFD3F.jpg?v=1771627499"},{"product_id":"reliance-electric-static-sequence-card-0-51874-2-0226-536","title":"Reliance Electric Static Sequence Card 0-51874-2","description":"\u003cp\u003eThis listing is for a used Reliance Electric 0-51874-2 SSCC Static Sequence Card, also referred to as a Static Sequence Control Board or SSCC Electronic Module. This board is designed for use in Reliance Electric MaxPak DC drive systems, where it functions as the static sequence control interface managing major and minor loop sequencing within the drive assembly.\u003c\/p\u003e\n\n\u003cp\u003eThe board features a grid-patterned PCB silkscreen with alphanumeric coordinate markings. Visible components include integrated circuits, diodes, metal film resistors, wire-wound resistors, test points labeled TP1 through TP5, transistors, ceramic disk capacitors, polyester axial capacitors, aluminum electrolytic capacitors, and two Omron 24 VDC relays. A gold-edge card connector runs along one edge for backplane insertion. The board mounts on a metal card guide assembly for rack installation.\u003c\/p\u003e\n\n\u003cp\u003eThe PCB silkscreen clearly shows part number 0-51874-2, revision G. A barcode label is present on the board face. This part number is also referenced in some documentation as 0518742. The 0-51874-2 is an obsolete and discontinued component, and the Reliance Electric brand has since been absorbed into Baldor-Reliance and ABB product lines. Replacement supply for this board is limited to the industrial surplus market.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-536\u003c\/p\u003e","brand":"Reliance Electric","offers":[{"title":"Default Title","offer_id":48856788074736,"sku":"m00536","price":799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/A80C22D5-D6BE-4212-B51A-199494165F57.jpg?v=1771628688"},{"product_id":"giddings-and-lewis-servo-interface-circuit-board-502-03420-00-0226-537","title":"Giddings and Lewis Servo Interface Circuit Board 502-03420-00","description":"\u003cp\u003eThis listing is for a used Giddings and Lewis Servo Interface board, part number 502-03420-00, assembly drawing number 501-04306-00, Revision 1, dated 8\/87. This board is also referenced in some sources under the FIVES brand, which acquired the Giddings and Lewis machine tool product line. The board is described by the manufacturer as a PC Board Assembly, Servo Interface, and is confirmed discontinued by the original manufacturer.\u003c\/p\u003e\n\n\u003cp\u003eThe PCB silkscreen label reads \"SERVO INTERFACE\" and identifies both part numbers prominently. Signal labels visible along the edge connector include FDBK-1, FDBK-2, DRV-CMD, SIN-RES, COS-RES, SIN-IND, COS-IND, GND, and ZERO, indicating resolver-based servo feedback interface functionality. Additional labeled test points include QA1, QA2, QA3, and QA4. The board carries a BAL trimmer potentiometer and an Ohmite precision resistor (91J1R0, 10 ohm 1%) along with Dale RS-2C and RS-7 precision resistors marked 10 ohm 0.05%. Two power transistor packages are mounted at one edge via a heatsink bracket. The board uses a gold-finger edge connector for rack insertion.\u003c\/p\u003e\n\n\u003cp\u003eThis board is used in Giddings and Lewis CNC machine tool systems requiring resolver-based analog servo feedback interfacing.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-537\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856810422512,"sku":"m00537","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/196BD686-9B21-4D96-99C6-ACC28ABFC78B.jpg?v=1771630057"},{"product_id":"reliance-electric-cldr-current-loop-driver-pc-board-0-51865-14-0226-538","title":"Reliance Electric CLDR Current Loop Driver PC Board 0-51865-14","description":"\u003cp\u003eThis listing is for a used Reliance Electric 0-51865-14 CLDR Current Loop Driver PC Board. This board is designated CLDR by Reliance Electric and is identified in third-party documentation as a plug-in component of the Reliance Electric MaxPak Plus DC drive system. The 0-51865-14 occupies the CLDR slot position on the MaxPak Plus 51377-31 motherboard rack, alongside other drive function cards including the SSCC, CVTH, ACCA, and TSSA boards.\u003c\/p\u003e\n\n\u003cp\u003eThe PCB silkscreen clearly shows part number 0-51865-14 and carries the Reliance Electric logo mark. The board features a grid-patterned coordinate system with numeric and alphabetic axis labels. Visible components include multiple DIP integrated circuits, film resistors, tantalum and electrolytic capacitors, a precision metalized film capacitor marked 1.0 plus or minus 1% 100V (part 65081810SF, 66056-14AF), BLN2004AN transistors or similar TO-92 and TO-220 packaged devices, and test points labeled TP1 through TP5. Three BNC-style coaxial connectors are mounted along the left edge of the board. A gold-finger edge connector runs along the right edge for rack backplane insertion.\u003c\/p\u003e\n\n\u003cp\u003eThis is a discontinued, obsolete component. Reliance Electric has since been absorbed into the Baldor-Reliance and ABB product lines. Replacement supply is limited to the industrial surplus market.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-538\u003c\/p\u003e","brand":"Reliance Electric","offers":[{"title":"Default Title","offer_id":48856820416752,"sku":"m00538","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/08F3A1A8-1705-48CC-9314-2857DF5589EE.jpg?v=1771630285"},{"product_id":"reliance-electric-ccc-custom-component-card-pc-board-0-52840-96-0226-539","title":"Reliance Electric CCC Custom Component Card PC Board 0-52840-96","description":"\u003cp\u003eThis listing is for a used Reliance Electric 0-52840-96 CCC Custom Component Card PC Board. This board is a plug-in card designed for use in the Reliance Electric MaxPak Plus DC spindle drive system, occupying the CCC slot position on the MaxPak Plus 51377-31 motherboard rack. The serial label HD4000439 is visible on the board face.\u003c\/p\u003e\n\n\u003cp\u003eThe 0-52840-96 is a more extensively populated CCC variant than the standard 8-dial faceplate boards in the same 0-52840 series. The board carries no faceplate but features a dense array of adjustment potentiometers and labeled functional zones silkscreened directly onto the PCB surface. Labeled adjustment zones include Reference Rate, Feed Permissive, Major Loop Compensate, Speed Comp, Current Loop, Jog Function, Seq. Delay, and Field Reg. Named potentiometers include R61 Width, J61 Zero, R43 Stab A, R44 Stab B, R41 Loss A, R42 Loss B, R81 Down Rate, R82 SPL LS1, R83 SPL LS2, R71 Rate, and others. Jumper positions include J11 Fast, J12 Slow, J21 Fwd, J22 Rev, and speed range selections. A gold-finger edge connector runs along one edge for backplane insertion into the MaxPak Plus rack.\u003c\/p\u003e\n\n\u003cp\u003eVisible components include metal film resistors, electrolytic and polyester capacitors, and multiple DIP integrated circuits. The board carries the Reliance Electric logo mark. This is a discontinued, obsolete component available only through the industrial surplus market.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-539\u003c\/p\u003e","brand":"Reliance Electric","offers":[{"title":"Default Title","offer_id":48856821301488,"sku":"m00539","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/E15045A0-7A43-488B-B6FB-9BB5AF5D9BB5.jpg?v=1771630384"},{"product_id":"giddings-and-lewis-servo-control-486-circuit-board-501-04707-00-0226-546","title":"Giddings and Lewis Servo Control 486 Circuit Board 501-04707-00","description":"\u003cp\u003eGiddings and Lewis Servo Control 486 circuit board, part number 501-04707-00, revision R5, dated 10\/95. Also referenced by assembly sticker 503-25209-01. This large-format, multi-layer PCB was produced by Giddings and Lewis for use in their 486-based CNC machine tool control systems, including horizontal boring mills and machining centers equipped with the G\u0026amp;L Centurion and related control platforms.\u003c\/p\u003e\n\n\u003cp\u003eThe board features a dense population of through-hole and surface-mount components including multiple CHIPS-branded processor ICs, oscillator circuits, DIP logic packages, and numerous proprietary G\u0026amp;L subassembly ICs identified by 502-series part numbers. Three SBX expansion connectors are present along the left edge, consistent with the G\u0026amp;L modular backplane architecture. The board was manufactured in the United States.\u003c\/p\u003e\n\n\u003cp\u003eThis part number appears in active US surplus markets as a direct replacement for failed or damaged servo control boards in G\u0026amp;L 486-generation CNC systems. It is suited for facilities maintaining legacy Giddings and Lewis machine tools and requiring a spare or replacement servo control board. Compatibility should be confirmed against the specific machine control configuration prior to installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-546\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856864227568,"sku":"m00546","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/B2548C1D-E67B-48A9-A883-A83BB46D002D.jpg?v=1771631075"},{"product_id":"hurco-v2-atc-relay-pcb-assembly-415-0241-001-200-v-0226-548","title":"Hurco V2 ATC Relay PCB Assembly 415-0241-001 200 V","description":"\u003cp\u003eHurco V2 ATC Relay PCB Assembly, part number 415-0241-001, revision A, also referenced by board number 414-0241-001 Rev A. Silkscreened \"V2 ATC RELAY PCB ASSEMBLY (ARP)\" on the component side. This board was manufactured in the USA and is used in Hurco V2 CNC vertical machining centers to control the Automatic Tool Changer relay functions, including Tool Magazine Left (TML) and Tool Magazine Right (TMR) circuits as labeled on the board.\u003c\/p\u003e\n\n\u003cp\u003eThe assembly is populated with four Potter and Brumfield style power relays, one smaller signal relay in a clear housing, multiple 0.1uF 100 ohm snubber capacitor networks, orange screw terminal connectors, a DIP switch block, a DB15 style connector, a 15-pin header connector, and an Oriental Motor module rated 200V 50\/60Hz 3A mounted vertically at the upper right corner. The board also carries indicator LEDs and diodes for relay feedback circuits. The PCB is green fiberglass with white silkscreen and carries a CAUTION warning noting high voltage is present on the board.\u003c\/p\u003e\n\n\u003cp\u003eThis board is a direct replacement for the ATC relay PCB position in Hurco V2 machining centers. Compatibility should be confirmed against the specific machine model and control revision prior to installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-548\u003c\/p\u003e","brand":"Hurco","offers":[{"title":"Default Title","offer_id":48856883101936,"sku":"m00548","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/14B565D7-D663-4747-BD90-A8B89DFDB31A.jpg?v=1771631283"},{"product_id":"giddings-and-lewis-executive-control-board-501-04301-02-0226-547","title":"Giddings and Lewis Executive Control Board 501-04301-02","description":"\u003cp\u003eGiddings and Lewis Executive Control Board, PCB board number 501-04301-02, catalog assembly number 502-03415-02. This large-format, multi-layer circuit board is part of the Giddings and Lewis 8000 and 8000B CNC control system, identified as the Executive Control Board in the G\u0026amp;L 8000 nest backplane architecture. The board is silkscreened \"EXECUTIVE CONTROL BD.\" and carries the board number and catalog number in yellow silkscreen along the bottom edge, consistent with standard G\u0026amp;L 8000 board labeling conventions.\u003c\/p\u003e\n\n\u003cp\u003eThe board is populated with Zilog Z88C681CP\/40 dual UART ICs, multiple SBX expansion connectors along the left edge, oscillator modules, Texas Instruments logic ICs, and numerous labeled subassembly EPROMs including 502-52996-00, 502-52995-00, 502-52994-00, and 502-52993-01 revision codes. Date codes visible on components indicate manufacture in the late 1980s. The board also features two 88C681CP\/40 labeled CH1 and CH2 designators visible in photo 2.\u003c\/p\u003e\n\n\u003cp\u003eThis board is used as a direct replacement or spare for the Executive Control Board position in G\u0026amp;L 8000 CNC systems. Compatible catalog numbers for this board number per G\u0026amp;L documentation include 503-19029-00, 573-19030-00, M.1008.0502, M.1016.8802, M.1017.3434, and M.1017.3435. Compatibility should be verified against the specific machine control configuration prior to installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-547\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856887984368,"sku":"m00547","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/610ACD92-CE55-4C85-A42B-46FBC7A6576F.jpg?v=1771631361"},{"product_id":"giddings-and-lewis-servo-interface-circuit-board-502-03092-00-0226-549","title":"Giddings and Lewis Servo Interface Circuit Board 502-03092-00","description":"\u003cp\u003eGiddings and Lewis Electronics Servo Interface circuit board, catalog number 502-03092-00, PCB board number 501-03882-00, revision RC, dated 5\/84. The Giddings and Lewis logo appears on the component side along with the designation \"SERVO CHAN\" at connector P2 and labeled test points TP1 through TP10 along the left edge. Signal labels visible include GAIN, BAL, COS IND, RES CMD, DRV, SIN IND, FDBK 1, FDBK 2, and GND.\u003c\/p\u003e\n\n\u003cp\u003eThe board is populated with National Semiconductor LM301 and LM1458 op-amp ICs in DIP packages, two large TO-3 style power transistors identified as S8548 \/ LH0101CK mounted to purple anodized aluminum heat sinks, precision RS-7 wirewound resistors rated 100 ohm 0.05%, trimmer potentiometers, and gold-fingered edge connectors on both ends. The board was manufactured in the USA.\u003c\/p\u003e\n\n\u003cp\u003eThis board is listed in the Giddings and Lewis 8000 CNC circuit board inventory as the Servo Interface, where it provides the analog servo command and feedback interface function within the G\u0026amp;L CNC control system. It is suitable as a direct replacement or spare for compatible Giddings and Lewis CNC machine tool systems. Compatibility should be confirmed against the specific machine and control configuration prior to installation.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-549\u003c\/p\u003e","brand":"Giddings and Lewis Electronics","offers":[{"title":"Default Title","offer_id":48856892735728,"sku":"m00549","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/3EDE5834-CBD9-49B9-BF8A-38FABD5A8781.jpg?v=1771631480"},{"product_id":"giddings-lewis-servo-interface-circuit-board-501-03882-00-502-03092-00-0226-551","title":"Giddings \u0026 Lewis Servo Interface Circuit Board 501-03882-00 \/ 502-03092-00","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis Servo Interface circuit board, assembly number 501-03882-00, schematic number 502-03092-00, manufactured by Giddings and Lewis Electronics. The board carries internal reference label M.1008.0300 and serial number A27056 as visible on the board edge. The PCB is configured as a single-axis servo interface card with dual power transistor assemblies (National Semiconductor LH0101CK) mounted on heatsink brackets, precision Dale RS-7 resistors rated at 10 ohms 0.05%, and multiple LM301A and LM8652 op-amp ICs. Silkscreen designations include GAIN, BAL, COS, RES, CMD, DRV, SIN, IND, FDBK, and GND signal points along the left edge connector, with SERVO CHAN and P1 CONN edge connectors at the bottom and right. The board also references resolver and feedback signal conditioning consistent with analog servo axis control in Giddings and Lewis CNC machine tool systems. Physical condition shows populated components with no visible signs of burning, cracking, or missing parts. This board is intended for replacement or spare use in compatible Giddings and Lewis CNC systems utilizing this servo interface assembly. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-551\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856895815920,"sku":"m00551","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/F2A3F701-8DD2-4EC9-BE84-4A89585AFA0B.jpg?v=1771631569"},{"product_id":"giddings-and-lewis-servo-interface-circuit-board-501-03882-00-502-03092-00-0226-552","title":"Giddings and Lewis Servo Interface Circuit Board 501-03882-00 \/ 502-03092-00 m00552","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis Servo Interface circuit board, assembly number 501-03882-00, schematic number 502-03092-00, manufactured by Giddings and Lewis Electronics. The board carries serial number A16869 as visible on the barcode label at the board edge, with a revision date code of RC 5\/84 silkscreened on the top side. The PCB is configured as a single-axis servo interface card with dual power transistor assemblies (National Semiconductor LH0101CK) mounted on heatsink brackets, precision Dale RS-7 resistors rated at 100 ohms 0.05%, and multiple LM301 and MB444 op-amp ICs. Silkscreen designations include GAIN, BAL, COS, RES, CMD, DRV, SIN, IND, FDBK, and GND signal points along the left edge connector, with SERVO CHAN and P1 CONN edge connectors at the bottom and right sides. Signal conditioning components and layout are consistent with analog resolver feedback servo axis control used in Giddings and Lewis CNC machine tool systems. All components appear visually present with no visible signs of burning, cracking, or physical damage. This board is intended for replacement or spare use in compatible Giddings and Lewis CNC systems utilizing this servo interface assembly. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-552\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856897257712,"sku":"m00552","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/002836DF-682A-4A27-B306-C382E4FD4932.jpg?v=1771631607"},{"product_id":"giddings-and-lewis-servo-interface-circuit-board-501-03882-00-502-03092-00-0226-553","title":"Giddings and Lewis Servo Interface Circuit Board 501-03882-00 \/ 502-03092-00","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis Servo Interface circuit board, assembly number 501-03882-00, schematic number 502-03092-00, manufactured by Giddings and Lewis Electronics. The board carries serial number A26428 as visible on the barcode label at the board edge, with a revision date code of RC 5\/84 silkscreened on the top side. The PCB is configured as a single-axis servo interface card with dual power transistor assemblies (National Semiconductor LH0101CK) mounted on heatsink brackets, precision Dale RS-7 resistors rated at 100 ohms 0.05%, and multiple LM301 and MB652 op-amp ICs. Silkscreen designations include GAIN, BAL, COS, RES, CMD, DRV, SIN, IND, FDBK, and GND signal points along the left edge connector, with SERVO CHAN and P1 CONN edge connectors at the bottom and right sides. Signal conditioning components and layout are consistent with analog resolver feedback servo axis control used in Giddings and Lewis CNC machine tool systems. All components appear visually present with no visible signs of burning, cracking, or physical damage. This board is intended for replacement or spare use in compatible Giddings and Lewis CNC systems utilizing this servo interface assembly. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-553\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856900305136,"sku":"m00553","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/821674B2-70C8-4E54-BA53-8FAC4BE00360.jpg?v=1771631670"},{"product_id":"reliance-electric-0-51831-7-cvth-current-voltage-transductor-circuit-board-card-0226-554","title":"Reliance Electric 0-51831-7 CVTH Current Voltage Transductor Circuit Board Card","description":"\u003cp\u003eThis listing is for one used Reliance Electric 0-51831-7 CVTH Current Voltage Transductor circuit board card. The board number 0-51831-7 is silkscreened on the PCB and also identified via a sticker label reading 7053290003R visible on the brass heatsink cover. The assembly includes a metal front faceplate with a four-position screw terminal strip and a connected PCB mounted behind it. The faceplate left side carries labeled connections for arm current, shunt, and field current shunt signals, with the user caution to properly set range taps upon replacement. The PCB is populated with two yellow potted transformers marked 6743-13A and 9743-13A, a 2N3055 NPN power transistor mounted to the brass heatsink plate, Dale wirewound resistors marked 63481-22E, LM307 and LM301AN op-amp ICs, electrolytic capacitors, and a bridge rectifier arrangement. A gold-fingered edge connector at the board rear allows plug-in installation into compatible Reliance MaxPak Plus or equivalent drive rack slots. This product has been discontinued by the original manufacturer and is available as a surplus replacement. Buyers are responsible for confirming compatibility with their specific drive system configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-554\u003c\/p\u003e","brand":"Reliance Electric","offers":[{"title":"Default Title","offer_id":48856902467824,"sku":"m00554","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/ABA4C031-1ED4-472B-887D-E5966372E185.jpg?v=1771631728"},{"product_id":"giddings-and-lewis-linear-isolator-circuit-board-501-04172-00-502-03326-00-0226-555","title":"Giddings and Lewis Linear Isolator Circuit Board 501-04172-00 \/ 502-03326-00 m00555","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis Linear Isolator circuit board, assembly number 501-04172-00, schematic number 502-03326-00. The serial number A98097 is visible on the barcode label at the board edge. The board is designed as a dual-channel linear signal isolation card featuring two Burr-Brown ISO100AP precision isolation amplifiers (IC-1 and IC-2), a Burr-Brown model 722 HV-ISO DC\/DC converter module (IC-3) providing isolated power, and two IC-4 and IC-5 DIP socket positions for additional signal conditioning. Each channel section is labeled SIG1 and SIG2 and includes a 12-position screw terminal block for field wiring connections, with terminals numbered 1 through 12. On-board trimmer potentiometers VR1-2, VR1-3, and VR1-4 are visible for channel calibration. Yellow film capacitors, ceramic disc capacitors, and metal film resistors populate the remaining circuit areas. A gold-fingered edge connector at the top of the board allows plug-in installation into a compatible Giddings and Lewis CNC backplane. This board functions to provide galvanic isolation of analog signals within Giddings and Lewis CNC machine tool control systems. All components appear visually present with no visible signs of burning, cracking, or physical damage. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-555\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856911085808,"sku":"m00555","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/BD723D0B-3505-4126-BB02-D0266F77FF4F.jpg?v=1771631816"},{"product_id":"giddings-and-lewis-linear-isolator-circuit-board-501-04172-00-502-03326-00-0226-556","title":"Giddings and Lewis Linear Isolator Circuit Board 501-04172-00 \/ 502-03326-00","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis Linear Isolator circuit board, assembly number 501-04172-00, schematic number 502-03326-00, with board number 374200 visible on the PCB. The board is designed as a dual-channel linear signal isolation card featuring two Burr-Brown ISO100AP precision isolation amplifiers (IC-1 and IC-2) and a Burr-Brown model 722 HV-ISO DC\/DC converter module (IC-3) providing isolated power for both channels. Each channel section is labeled SIG1 and SIG2 and includes a 12-position screw terminal block for field wiring connections with terminals numbered 1 through 12. Yellow film capacitors are installed at each terminal block section for signal filtering. IC-4 and IC-5 DIP socket positions are populated. On-board blue trimmer potentiometers VR1-2, VR1-3, and VR1-4 are present for per-channel offset and gain calibration. Metal film resistors and ceramic capacitors populate the remaining circuit areas. A gold-fingered edge connector at the top of the board allows plug-in installation into a compatible Giddings and Lewis CNC backplane. This board provides galvanic isolation of analog signals within Giddings and Lewis CNC machine tool control systems. All components appear visually present with no visible signs of burning, cracking, or physical damage. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-556\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856921800944,"sku":"m00556","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/8F9A0553-2E73-4549-BA01-E2C9891F7827.jpg?v=1771631898"},{"product_id":"giddings-and-lewis-eia-cl-convertor-circuit-board-501-03377-00-502-02918-00-0226-557","title":"Giddings and Lewis EIA-CL Convertor Circuit Board 501-03377-00 \/ 502-02918-00","description":"\u003cp\u003eGiddings and Lewis EIA-CL Convertor Circuit Board, assembly number 501-03377-00, schematic number 502-02918-00, manufactured by Giddings and Lewis Electronics. The board is a large-format double-sided PCB with gold-fingered edge connectors on both the left and right sides for backplane installation. The board revision date code RD 3.81 is silkscreened on the component side along with a SERIAL NO. designation, though the serial number field is blank in the available photos. A 12-position screw terminal block labeled 1TB provides field wiring connections for power and signal lines including +15V, GND (three positions), -15V, Current Loop + Input, Current Loop Output, Current Loop Input, Current Loop + Output, EIA Input, and EIA Output. Additional visible components include two optocoupler assemblies (MC1 and MC2), a red DIP switch array with 8 positions at position 13, small signal transistors, diodes, and resistors. The board functions as an EIA to current loop serial communications interface converter within Giddings and Lewis CNC machine tool control systems. All components appear visually present with no visible signs of burning, cracking, or physical damage. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\u003cp\u003eStock # 0226-557\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856937529584,"sku":"m00557","price":189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/E873C1B6-F6DF-4339-B86A-B95E2EBEA504.jpg?v=1771632136"},{"product_id":"giddings-and-lewis-math-board-circuit-board-assembly-501-02988-00-502-02733-00-0226-558","title":"Giddings and Lewis Math Board Circuit Board Assembly 501-02988-00 \/ 502-02733-00","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis Math Board circuit board assembly, part number 501-02988-00, schematic number 502-02733-00, manufactured by Giddings and Lewis Electronics. The board number A219002 is visible on the component side. This is a large-format single-sided PCB with metal card guide rails installed on both the top and bottom edges and gold-fingered edge connectors along the left and right sides for backplane installation into a compatible Giddings and Lewis CNC control rack. The board is densely populated with rows of 14-pin and 16-pin DIP integrated circuits in black ceramic and plastic packages, consistent with TTL and MSI logic families used in arithmetic processing applications. Yellow labeled ICs marked 185 are visible throughout, along with red disc capacitors used for bypassing. The board functions as a math co-processor or arithmetic logic unit within the Giddings and Lewis CNC machine tool control system, performing floating point or integer arithmetic operations in support of the main CNC processor. This product has been discontinued by the original manufacturer and is available as a surplus replacement. All components appear visually present with no visible signs of burning, cracking, or missing parts. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-558\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856952537328,"sku":"m00558","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/9821E98C-7511-4118-B0D6-AABAB1C2F0FC.jpg?v=1771632231"},{"product_id":"giddings-lewis-eia-interface-circuit-board-501-03168-00-502-02804-50-0226-559","title":"Giddings \u0026 Lewis EIA Interface Circuit Board 501-03168-00 \/ 502-02804-50 m00559","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis EIA Interface circuit board, assembly number 501-03168-00, schematic number 502-02804-50, manufactured by Giddings and Lewis Electronics. A board number is visible at the upper left of the component side. This is a large-format double-sided PCB with metal card guide rails on both the top and bottom edges and gold-fingered edge connectors along the left and right sides for backplane installation. The board is densely populated with rows of 14-pin and 16-pin DIP integrated circuits marked with National Semiconductor DM74LS family designations including DM74LS00N, DM74LS08N, DM74LS30N, DM74LS42N, DM74LS86N, DM74LS174N, DM74LS513AN, and DM74LS536N devices, along with Motorola and Texas Instruments equivalents. A gold-lidded ceramic package IC is visible at board position BB1 center, accompanied by a metal can crystal oscillator marked 2.764 MHz. Red disc capacitors and yellow bypass capacitors are distributed throughout. Multiple test points are labeled TP1 through TP12. The board functions as an EIA serial communications interface processor within Giddings and Lewis CNC machine tool control systems. This product has been discontinued by the original manufacturer and is available as a surplus replacement. All components appear visually present with no visible signs of burning, cracking, or missing parts. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-559\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856957452528,"sku":"m00559","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/82DBFDA9-37CF-470D-92F2-07B42350A9A6.jpg?v=1771632263"},{"product_id":"giddings-lewis-eia-interface-circuit-board-501-03168-00-502-02804-50-0226-560","title":"Giddings \u0026 Lewis EIA Interface Circuit Board 501-03168-00 \/ 502-02804-50","description":"\u003cp\u003eThis listing is for one used Giddings and Lewis EIA Interface circuit board, assembly number 501-03168-00, schematic number 502-02804-50, manufactured by Giddings and Lewis Electronics. A serial number label is present at the lower right board edge. This is a large-format double-sided PCB with metal card guide rails on both the top and bottom edges and gold-fingered edge connectors along the left and right sides for backplane installation into a compatible Giddings and Lewis CNC control rack. The board is densely populated with rows of 14-pin and 16-pin DIP integrated circuits including Texas Instruments and National Semiconductor DM74LS family logic devices. A Texas Instruments TMS601NC serial communications IC in a 40-pin DIP package is visible at the lower center of the board at position TP6, accompanied by a metal can crystal oscillator marked 2 MHz. Red disc capacitors and axial resistors are distributed throughout, along with multiple test points labeled TP1 through TP9. The board functions as an EIA serial communications interface processor within Giddings and Lewis CNC machine tool control systems. This product has been discontinued by the original manufacturer and is available as a surplus replacement. All components appear visually present with no visible signs of burning, cracking, or missing parts. Buyers are responsible for confirming compatibility with their specific machine configuration prior to purchase.\u003c\/p\u003e\n\n\u003cp\u003eStock # 0226-560\u003c\/p\u003e","brand":"Giddings and Lewis","offers":[{"title":"Default Title","offer_id":48856958435568,"sku":"m00560","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/6648\/7280\/files\/A51554D0-AEA6-4943-8911-786098F17B46.jpg?v=1771632317"}],"url":"https:\/\/mroexchange.com\/collections\/cnc-control-modules.oembed?page=5","provider":"MRO Exchange","version":"1.0","type":"link"}