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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 #0226-00633

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 CNC Series 6A and 6B control systems, the A20B-0008-0540 is a large-format I/O board providing 96 discrete inputs and 64 discrete outputs for machine tool interface and control. The board carries the primary part number A20B-0008-0540 silkscreened on the component side and the reverse side is marked A350-0008-T544/01, both confirmed visible in the photos. Manufactured in Japan by Fanuc. The board is mounted in a gold-anodized aluminum carrier frame with multiple blue IDC edge connectors labeled CO1 through CO5 along one side, and additional blue and burgundy connectors along the opposite edge for CNC and machine interface cabling. The component side features arrays of through-hole ICs including MB74LS174 and 74406P series logic devices, a dense resistor network section with brown SIP resistor packs, and discrete logic components. A green LED indicator is visible near the lower connector cluster. This board is compatible with Fanuc Series 6 controls and can replace the earlier A20B-0007-0040 I/O board per published cross-reference data. Connector labels visible include CDA, CDB, and numbered I/O headers consistent with Series 6 DI/DO interface wiring.

Stock # 0226-633

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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.