Description
xThe A20B‑8100‑0336 is a communication interface printed circuit board used in industrial FANUC CNC controller systems to provide serial communications via the RS‑485 standard, often used for DNC (Direct Numerical Control) and other data transfer functions.
🔌 What This Board Does
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RS‑485 / DNC1 Serial Communication Module: This board adds a robust RS‑485 serial communication port to a FANUC controller, allowing the CNC to communicate with external devices such as PCs, DNC hosts, PLCs, or other automation systems over a multi‑drop, industrial‑grade serial network.
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Part of the A20B‑8100 Family: FANUC’s A20B‑8100 series includes various option and interface cards for controller systems — such as serial communications, Profibus, DeviceNet, etc. This particular variant (0336) is designated for RS‑485/DNC1 operation.
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Integration: Installed inside the CNC controller’s electronics cabinet in a dedicated communication slot or backplane connector, where it interfaces with the controller logic and other PCBs.
🛠 Typical Use
This board is especially useful in setups where the CNC must exchange program data, status information, or custom messages with external systems — for example:
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DNC networking with a host computer
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Program uploads/downloads to and from a factory network
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Communication with PLCs or other automation equipment using RS‑485 signaling
⚙️ Practical Notes
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🧰 Core Exchange: Some suppliers require you to return your old core board when purchasing a replacement.
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🛠 Repair Availability: Repair options may be limited or not offered by some vendors — often you’ll find refurbished or tested boards instead.
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📡 Not a CPU or motion board: This part does not perform motion control or CNC core processing, but strictly communication tasks.
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.
Custom Tab
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