{"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","url":"https:\/\/mroexchange.com\/products\/giddings-lewis-communication-board-501-03854-01-502-03063-01-0226-503","provider":"MRO Exchange","version":"1.0","type":"link"}