Fanuc A16B-2200-0660 I O Printed Circuit Board for CNC Systems

Product Overview

The Fanuc A16B-2200-0660 is an I/O printed circuit board used in Fanuc CNC (computer numerical control) systems. This board serves as an interface between the CNC main processor and machine tools' field devices such as limit switches, pushbuttons, relays, and solenoid valves. It is typically installed in the CNC control rack and communicates via the internal I/O bus. The A16B-2200-0660 is part of Fanuc's extensive family of control boards and is designed for high reliability in machine tool environments.

Key Features of A16B-2200-0660

The board provides a mix of digital input and output channels (specific count varies by configuration; typical 24 input / 16 output). Inputs are 24 V DC with opto-isolation. Outputs are typically open-collector transistor (24 V DC, 0.5 A) or relay. It includes LED indicators for each I/O point for quick status checking. The board is built on a 4-layer PCB with conformal coating for dust and humidity protection. It connects to field wiring via a 50-pin or 96-pin edge connector to a terminal block.

The A16B-2200-0660 operates from 24 V DC supplied by the CNC power unit. It has a diagnostic feature that can detect short circuits or open wires on certain outputs. The board supports hot plugging on some Fanuc rack systems. It is compatible with many Fanuc CNC models, including Series 0i, 15i, 18i, and 21i. The operating temperature range is 0 to 45°C.

Technical Specifications

• Manufacturer: Fanuc Corporation

• Part Number: A16B-2200-0660

• Product Type: I/O Printed Circuit Board

• Number of Inputs: Typically 24 (24 V DC, opto-isolated)

• Number of Outputs: Typically 16 (transistor, 24 V DC, 0.5 A)

• Output Protection: Overcurrent, short circuit

• Indicators: Per-point LED for input and output status

• Connector: 50-pin or 96-pin DIN connector

• Conformal Coating: Yes

• Power Supply: 24 V DC (from CNC)

• Operating Temperature: 0 to +45 °C

• Storage Temperature: -20 to +60 °C

• Dimensions: Standard Fanuc Eurocard (approx. 260 mm x 180 mm)

• Certifications: CE, FCC

Functional Description

The board scans its input circuits at high speed and makes the status available to the CNC processor via the backplane. Conversely, the processor sends output commands to the board, which then drives the output transistors or relays to control machine components. The opto-isolation protects the CNC from electrical noise generated by solenoids and contactors. The diagnostic LEDs allow technicians to verify signal activity without additional test equipment. In case of a fault, the board can signal the CPU, which may then stop the machine.

Applications

This I/O board is used in Fanuc CNC-controlled machine tools for interfacing with operator panels, tool magazines, coolant systems, and safety interlocks. It serves as a replacement part for failed I/O boards in existing machines.