Description
x📌 FANUC A20B‑2003‑0280 — 3‑Slot Backplane PCB
The A20B‑2003‑0280 is a backplane printed circuit board (PC board) used inside FANUC CNC controller chassis as the back panel/backplane where other control modules plug in.
🧩 What It Is
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Part Number: A20B‑2003‑0280
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Function: A 3‑slot backplane PCB — this board provides the physical and electrical slot connections for up to three plug‑in control cards (e.g., CPU, communication, memory, display modules) inside the FANUC controller rack.
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Series: Part of the FANUC A20B‑2003 backplane/back panel series.
🧠 Key Role
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Serves as the physical structure and electrical interface between the controller’s main electronics and peripheral boards.
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Supports three card slots, allowing multiple modules to be installed and interconnected.
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Without a functioning backplane like this, the controller can’t provide power or proper signaling to other boards — meaning the CNC would fail to initialize or run properly.
🛠️ Typical Use Cases
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Commonly found in FANUC Series 16i, 18i, or 21i controllers with modular card‑based architecture.
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Used in compact or modular CNC units requiring a small number of boards (e.g., CPU + I/O + display).
🔧 Notes
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Most suppliers sell this as new, refurbished/tested, or surplus — some offer core exchange or repair services.
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If damaged, the whole controller rack may not power up or communicate between boards correctly.
Additional Information
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Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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