Fanuc A20B-2101-0490/01A PC Circuit Board Module

1. Overview of the Fanuc A20B-2101-0490/01A

The Fanuc A20B-2101-0490/01A is a servo axis control board specifically designed for FANUC CNC systems. Constructed using a multi-layer, high-density PCB and industrial-grade components, it can operate 24/7 in an ambient temperature range of 0–55°C. The onboard high-speed DSP and the latest servo algorithms enable position closed-loop control with 0.001° resolution and a 250 μs current loop update rate. Support for the Serial Servo Bus (FSSB) provides nanometer-level trajectory accuracy for multi-axis linkage.

2. Core Features:

In terms of interfaces, the board provides four servo motor encoder ports, emergency stop and safety door interlock terminals, and a built-in 24 VDC/2 A brake power output for directly driving the motor holding brake. Front-panel LEDs display axis status and fault codes in real time. Combined with Fanuc's dedicated maintenance software, fault location and firmware upgrades can be completed within 5 minutes, significantly reducing downtime.

The A20B-2101-0490/01A is compatible with the αi/βi series servo amplifiers, which are widely used in high-speed machining centers, mill-turn machines, and robotic production lines. Its plug-and-play compatibility allows upgrades to older machines without rewiring, making it the preferred servo control core for improving equipment accuracy and reliability.

3. Related products

4.Product details pictures

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