How does shipping work for orders on MRO Exchange?

Most orders ship within 1–2 business days via UPS. Larger equipment ships via freight carrier, and customers can use the shipping estimator on the product page for a location-specific quote. Local pickup is also available at the Fairfield, IL facility, typically ready within 4 hours.

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MRO Exchange accepts all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available, with payment due prior to shipment. Custom terms are available for established accounts.

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Giddings and Lewis Linear Isolator Circuit Board 501-04172-00 / 502-03326-00

$239.00 USD

Sale Sold out

ConditionSurplus - Untested MPN501-04172 Stock #0226-00556

Photos reflect current condition. Items differing from description may be eligible for return or refund — see our condition guide.

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Estimated package weight: 5.0 lbs

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This 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.

Stock # 0226-556

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Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.