Westinghouse 1C31125G02 | Ovation DO Personality Module Specs

Description

Product Core Brief

• Model: 1C31125G02
• Brand: Westinghouse
• Series: Ovation DCS Digital I/O
• Core Function: Defines the electrical characteristics and output behavior of the paired digital output electronic module.
• Product Type: Digital Output Personality Module (DO PMOD)
• Key Specs: Pairs with 1C31122G01 EMOD | Dry or wet contact definition | Mounts on 1B30035H01 style base units
• Condition: New Surplus / New Original, depending on lot

Product Introduction

Westinghouse 1C31125G02 is a digital output personality module for Ovation systems. It plugs onto a DO electronic module and tells that card how to behave, including contact type, voltage class, and drive characteristics. No field wiring happens through the personality unit alone.

Value comes from fast recovery. Swapping the wrong personality card causes silent misfires, so keeping correct surplus on the shelf avoids hours of tracing. Most units store ID and calibration data read at power up, which speeds commissioning.

Key Technical Specifications

Quality Control Process

We treat this as a configuration carrier, not a standalone card, so testing focuses on identity and contact integrity.

1. Visual and pin inspection. Bent or pushed pins on the mating edge cause intermittent faults that look like EMOD failure. We check under magnification.
2. ID and memory read. The stored model ID must match the expected part. A mismatched chip gets flagged immediately, since the controller reads it at power up.
3. Continuity and fuse path check. A Fluke multimeter verifies internal fuse paths and contact continuity across each output leg.
4. Bench mate test. We install the unit on a known good 1C31122G01 EMOD and confirm the stack reports healthy rather than fault.
5. ESD packaging. Every unit ships in anti-static shielding with moisture barrier bags and a desiccant pack.

One correction from my own experience: I used to call this a relay output module. It is not. The EMOD does the switching, the personality card defines how.

Replacement Pitfall Guide

❗ Confusing the PMOD with the EMOD. Buying only this part will not fix a dead output channel. If the electronic module has failed, no personality card will revive it.

❗ Wrong contact type for the field loop. Dry contact versus wet contact selection must match the receiving device. Mismatched wiring burns input cards on the far end, not here.

❗ Ignoring base unit and terminal pairing. Ovation bases often hold two modules and require the correct terminal arrangement even when only one slot is used. Wrong base means wrong wiring path.

❗ Assuming jumpers solve a config problem. Most personality modules have no jumpers, and some require removing the card from the case to change defaults. Do not hunt for a switch that does not exist.

❗ Buying from listings with sloppy model data. Some sellers describe this as a 16 channel relay output module with IP67 ratings. That is a different class of hardware and will not drop into your rack. Verify against your EMOD and base before ordering.

Keep these in mind and you’ll cut 90% of rework time.

Compatibility Matrix & Benchmarks

• Scan and refresh behavior depends on the Ovation controller and I/O processor load, not on the personality card itself.
• Output drive capability follows the paired EMOD and field supply, so size fuses to the field device rather than the card.