GE Fanuc A03B-0807-C161 Relay Output Module

Configured for discrete high-voltage AC/DC load switching in Fanuc I/O system platforms, the GE Fanuc A03B-0807-C161 (A03B-0807-C161 Relay Output Module) provides direct physical/electrical execution. The module processes digital logic commands over the backplane bus to actuate 16 electromechanical relay contacts for isolated field device control.

Hardware Specifications

Backplane Bus Communication and Deterministic Logic Execution

The module operates using high-speed backplane bus communication velocity to route execution commands from the CPU to the 16 relay channels without latency spikes. Channel-to-channel high I/O density scaling integrates galvanic contact isolation within a compact footprint, isolating sensitive backplane logic from external voltage transients up to 250 VAC. Firmware flash compatibility ensures synchronized cyclic scan updates across all connected I/O racks.

Frequently Asked Questions

Q: What are the maximum voltage and current switching ratings for the A03B-0807-C161 relay outputs?

A: Each of the 16 relay channels supports a maximum switching current of up to 2 A at voltages up to 250 VAC or 30 VDC.

Q: Is hot-swapping supported for this module during live rack operation?

A: No. System power to the I/O base and field supply voltages connected to the relay terminals must be completely de-energized prior to removing or inserting the card to prevent arc flash and bus errors.

Field Installation Guidelines

1. Disconnect and isolate all main control power feeds and external field contact supply lines following standard Lockout/Tagout (LOTO) protocols.
2. Verify that the I/O rack chassis is securely bonded to the main enclosure earth ground strap.
3. Slide the module housing into the assigned slot on the I/O base unit until the backplane edge connector fully seats.
4. Secure the top and bottom retaining screws to ensure proper mechanical retention and chassis grounding.
5. Wire the relay field contacts to the front terminal block, verifying that load currents do not exceed 2 A per channel.