Factory New Fanuc Pc Fssb Detector Board A20B-2100-0570 A20B21000570 A2OB-21OO-O57O

FANUC A20B-2100-0570 I/F Detector PCB

Overview

The A20B-2100-0570 is a FANUC PCB in the A20B-2100 family. Public FANUC parts listings identify it specifically as an I/F DETECTOR PCB, which places the board in the interface and signal-detection side of the installed control hardware rather than in the operator panel or generic accessory group.

Public board-market listings also describe this model as an industrial PCB with 24 VDC operating voltage, 2 A current rating, 1.6 mm thickness, pin-connector connectivity, passive cooling, and PCB-mount construction.

Those values align with the user-provided description and help position the board as a hardware-level interface card used inside existing FANUC systems.

Technical Data

Application Value

This board is suited to installed FANUC control hardware where the original system already uses the A20B-2100 I/F detector board family. It is especially relevant in repair, refurbishment, and replacement work where the existing machine depends on the same board-level interface and detector function.

Because public listings identify it by a specific I/F detector PCB role, it should be matched as a functional board inside the control architecture, not as a generic replacement PCB. Keeping the same board number helps preserve the installed interface-board position and the original hardware structure.

Selection Notes

The key checks are the exact part number, the A20B-2100 family, and the public identification of the board as an I/F detector PCB.

The published 24 VDC / 2 A industrial-board profile is also useful when cross-checking the installed board against its physical hardware class.

FAQ

Q1: What kind of board is A20B-2100-0570?
It is a FANUC I/F detector PCB. Public FANUC parts listings use that exact wording, which makes the board’s role much clearer than a generic “circuit board” description. It belongs to the interface/detector side of the hardware rather than to memory or CPU functions.

Q2: Why is the “I/F detector PCB” wording important?
Because that description identifies the board by function inside the control system. A board defined publicly as an I/F detector PCB should be matched by that exact role when replacing it.

That helps keep the installed hardware structure consistent and avoids mixing board families that may look similar but serve different functions.

Q3: What do the 24 VDC and 2 A details tell you?
They describe the published industrial-board operating profile shown in public marketplace listings for this model.

Those details help place the board in the hardware class of low-voltage internal control PCBs and can be useful when comparing the installed board to the replacement candidate.

Q4: Is this board treated as a generic spare or as a specific functional board?
Public FANUC parts sources treat it as a specific functional board by naming it I/F detector PCB.

That means the board is identified by role, and the correct replacement approach is to match the exact model already installed in the machine.

Q5: What should be checked before ordering?
Check the installed part number, confirm the machine uses A20B-2100-0570, verify that the original board role is I/F detector PCB, and compare the board’s hardware profile with the installed unit.

Those are the main compatibility points supported by the public references for this model.