FANUCA03B-0819-C154I/O Unit-MODEL A 16-Point DC Output Module, 12/24 V DC 0.5 A, Source Type

Product Description

What this part is

A Fanuc I/O Unit-MODEL A digital output module, model designation AOD16D. It carries 16 output points switching a 12 or 24 V DC load at up to 0.5 A per point, in source configuration, so each output supplies positive volts to its load and the load returns to the common negative. The module is a plug-in board for a Fanuc I/O Unit-MODEL A base unit and is the output stage between the CNC or PMC and the machine’s solenoid valves, relays and indicators.

Decoding the order code

A03B is Fanuc’s own ordering prefix for I/O Unit and peripheral hardware — Fanuc’s scheme, distinct from the GE Fanuc IC6xx numbering that is sometimes confused with it. 0819 is the I/O Unit-MODEL A module group. In the suffix, the leading letter is the significant field: C designates the printed circuit module on its own, where a J in the same position designates a complete assembled unit. 154 is the individual module. The model name stamped on the board decodes separately: A for I/O Unit-MODEL A, O for output, D for DC, and 16 for the point count — hence AOD16D. A trailing #D seen on some cartons is a Fanuc drawing or CE revision marker, not a different module.

What these specs mean in practice

Half an amp per point is a solenoid and interposing-relay rating, not a motor rating, and the useful question on a retrofit is the simultaneous-on figure rather than the per-point one: sixteen points all energised is a different thermal case from two. Source-type output matters more than it looks. A source module and a sink module are not interchangeable on the same field wiring, because the common rail changes polarity; swapping one for the other leaves every load either permanently off or permanently energised through its return. The 12 to 24 V range covers both the common Fanuc machine control voltage and legacy 12 V pilot circuits on the same board.

Quantity and configuration

1 Pc. Output module only. No base unit, no I/O Unit-MODEL A rack or interface module, no field connector or terminal block, no flat cable, no 24 V load supply and no mounting hardware.

Installation and setup notes

The module plugs into a slot on a Fanuc I/O Unit-MODEL A base unit, which is what carries the field terminations and the link back to the interface module. Addressing follows the slot position and is declared in the I/O Link assignment, so a module moved to a different slot is a software change as well as a mechanical one. The board is approximately 130 mm long, 130 mm high and 35 mm thick.

Interchange guidance

Other AOD-series modules in the same 0819 group differ in point count, voltage or output polarity — those are related modules and not substitutions, since polarity and point count both change the field wiring. Any module supplied under an A03B-0819-J number is a complete unit rather than a bare module and includes hardware not present here. Fanuc I/O Unit-MODEL B modules use an entirely different base and are not compatible.