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 Processor Module 501-03865-01

$179.00 USD

Sale Sold out

ConditionSurplus - Untested MPN501-03865 Stock #0226-00417

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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Used 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&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&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.

Stock # 0226-417

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Frequently Asked Questions

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.