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.

What payment methods does MRO Exchange accept?

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.

1 2

Giddings & Lewis 501-03377-00 / 502-02918-00 EIA-CL Converter Circuit Board

$179.99 USD

Sale Sold out

✓ 30-day returns on every item — return policy

ConditionSurplus - Untested MPN501-03377-00 / 502-02918-00 Stock #0226-00557

30-day returns on every item. Photos reflect the actual item’s current condition — see our return policy and condition guide.

Shipping Estimate

⚡ Same-day shipping available — order by 11 am CT ($100 add-on at checkout)

✓ Free domestic UPS Ground shipping — applied automatically at checkout.

Same-Day Available
Real support team
Secure checkout

Giddings 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.

Stock # 0226-557

View full details

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.