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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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Fanuc A20B-0008-0540 I/O Interface Board

$49.99 USD

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✓ 30-day returns on every item — return policy

ConditionSurplus - Untested MPNA20B-0008-0540 Stock #0226-00632

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

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Used in Fanuc Series 6A and 6B CNC machining centers and turning centers, the A20B-0008-0540 is a discrete I/O interface board designed to handle machine tool input and output signal routing within the control system. This board carries part number A20B-0008-0540 with revision /01A and board reference A350-0008-T544/01, both of which are visible on the PCB silkscreen. Manufactured by Fanuc in Japan, it is populated with standard TTL-family logic ICs including HD74LS174P devices and SN7406N buffers, consistent with the discrete I/O architecture used across the Fanuc 6 series control platform. Published specifications for this board indicate a capacity of 96 discrete inputs and 64 discrete outputs. The board fits the standard Fanuc 6 series card cage format and interfaces with the control backplane through edge connectors. It is a known direct replacement for the earlier A20B-0007-0040 board. The board is mounted in a gold-anodized aluminum carrier frame with standard card-cage slot hardware. Compatible controls include the Fanuc 6M and 6T series. Part number A20B-0008-0540 is the OEM market-recognized identifier used consistently in active US industrial surplus listings for this assembly.

Stock # 0226-632

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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.