Fanuc Output Module A03B-0801-C112 A03B0801C112 AO3B-O8O1-C112 USED

FANUC A03B-0801-C112 | OD32B 32-Point DC Digital Output Module — Series 10 / 11 / 15 CNC PLC / 24–48V DC

32-Channel DC Output for the Series 10/11/15 PLC Backplane

The A03B-0801-C112 is the OD32B model digital output module for the PLC backplane used in FANUC's Series 10, 11, and 15 CNC systems. It provides 32 independent DC output channels — each capable of driving solenoid valves, relay coils, indicator lamps, and other 24–48V DC actuators at up to 0.25A per point.

In the A03B-0801 I/O system architecture, the OD32B output module plugs directly into the PLC I/O base unit alongside input modules, analogue modules, and other I/O function modules. The module's 32 outputs connect to the CNC's PMC (Programmable Machine Controller) ladder logic programme. When the PMC commands an output channel ON, the corresponding output transistor activates and drives the field load.

The OD32B designation is the module identifier within the A03B-0801 series output module family. Adjacent variants cover different output counts and voltage ratings — the OD32B's 32-point, 24–48V DC, 0.25A/point specification defines its position in the family. The internal PCB — A16B-1310-0090 — is permanently assembled inside the OD32B module housing and is not available as a separate stock item.

Key Specifications

0.25A Per Point — Output Current and Load Selection

The 0.25A per-point current limit defines the maximum load that can be directly driven by each output channel. Standard 24V DC relay coils typically draw 20–100mA — well within this limit. Solenoid valves range from 30mA to 200mA for compact industrial types. Indicator lamps draw 20–50mA. Loads exceeding 0.25A per channel must be switched through an interposing relay rather than driven directly from the module output.

FAQ

Q1: What FANUC CNC generations use the A03B-0801-C112?

The OD32B output module is confirmed for the FANUC Series 10, 11, and 15 CNC systems, which used the A03B-0801 modular I/O backplane architecture. It is not compatible with the Zero C (Series 0-C) I/O system, the i-series I/O Link system, or other FANUC generations that use different I/O architectures.

Q2: Is the A16B-1310-0090 internal PCB available separately?

The A16B-1310-0090 is a component permanently assembled inside the A03B-0801-C112 module. It is not available as a standard separate spare part — the complete A03B-0801-C112 module is the replacement unit. For component-level repair of a failed module, specialist FANUC Series 15 repair services may be able to source or rebuild the internal board within the module.

Q3: What symptoms indicate an OD32B output module has failed?

Specific output channels that do not activate despite confirmed PMC commands — visible in the CNC's PMC I/O monitor diagnostic screen — point to failed output transistors within the module. If a group of adjacent outputs fail simultaneously, the shared power or drive circuit for that group has failed. If all 32 outputs are non-functional, the module's main power input or the backplane connection should be verified first.

Q4: Does replacing the A03B-0801-C112 affect the PMC programme?

No. The PMC ladder programme is stored in the CNC's main memory, not in the I/O output module. Replacing the module installs a new output interface; the PMC programme remains unchanged. After replacement, verify all output channels activate correctly by testing each from the PMC I/O monitor before returning the machine to production.