Description
Key Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | WESTINGHOUSE / Emerson Ovation |
| Model | 1C31222G01 |
| Product Type | Relay output base assembly (DO PMOD, high-power) |
| Platform | Ovation DCS |
| Number of Channels | 12 |
| Relay Contact Type | Form X (normally open) |
| Relay Style | KUEP electromechanical |
| Relay Kit Reference | 5A26458G02 (Form X) |
| Rated Output | 150 VDC @ 10 A per channel |
| Auxiliary Power | ~15.9 W typical, 20.41 W maximum |
| Dielectric Isolation | Relay contacts to logic (per Ovation relay base spec) |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Compatible Logic Module | 1C31219G01 Ovation relay output logic module |
Product Introduction
In an Ovation rack, the 1C31222G01 is the part that actually carries the load current. The 1C31219G01 logic module decides when to trip; the 1C31222G01 base assembly closes the relay contacts that start pumps, open valves, or energize breakers. If the base fails, the logic may still look healthy on the operator station while the field device refuses to move.
This is a high-power Form X relay output base, rated for 150 VDC at 10 A per channel across 12 channels. It uses KUEP-style electromechanical relays and is commonly referenced with the 5A26458G02 relay kit. It is not interchangeable with the 1C31223G01 G2R-style base, which has different contact ratings and relay construction. Always confirm the removed unit label and the associated logic module before ordering.
QA/QC Transparency SOP
- Intake & Origin Verification — Confirm the label reads “1C31222G01.” Inspect relay sockets, terminal block, backplane connector, and mounting hardware for corrosion, overheating, or mechanical damage.
- Visual Relay Inspection — Check KUEP relay sockets for burnt pins, cracked housings, or loose retainers. Verify relay kit style matches Form X requirements.
- Electrical Parameter Tests — Use a Fluke 115 or equivalent to check coil circuit continuity, contact resistance, insulation resistance between channels, and auxiliary power rails.
- Functional Verification — If an Ovation test rack is available, pair with a 1C31219G01 logic module and verify channel actuation, LED status, and contact closure response. If no test rack is available, document the limitation.
- Final QC & Anti-Static Packaging — Seal in an ESD bag with model, serial/asset tag, relay style, test status, and date. Include a test report when live testing is performed.
Field Engineer Gotchas
- 1C31222G01 vs 1C31223G01 is not a drop-in swap. The 1C31222G01 is the high-power Form X / KUEP base; the 1C31223G01 is a G2R-style relay base with different contact ratings. Solution: match the exact base part number to the original design.
- It is not a standalone module. The 1C31222G01 is a relay output base assembly. It requires the 1C31219G01 relay output logic module to function. Ordering only the base without confirming the logic module status is a common mistake.
- Form X vs Form C confusion. Form X is normally open; Form C includes normally open and normally closed contacts. If the wiring expects Form C behavior, replacing a Form C base with a 1C31222G01 Form X base can change interlock logic.
- Auxiliary power limits. The base draws auxiliary power from the Ovation I/O supply. Overloading the segment with too many relay bases can cause voltage drop and intermittent tripping.
- Terminal block wiring errors. Ovation relay outputs use specific terminal assignments for NO/NC/common. Miswiring after a replacement can cause a device to remain energized or fail to trip. Solution: photograph the original terminal block before disconnecting.
WESTINGHOUSE 1C31222G01
Application Scenarios
- Power plant auxiliary control. Ovation systems in fossil and combined-cycle plants use relay output bases for pump start/stop, fan permissives, and breaker trip circuits.
- Turbine protection interfaces. High-power relay outputs isolate DCS logic from field devices that require 110/125 VDC or heavy AC/DC loads.
- Legacy Ovation I/O maintenance. Plants running older Ovation racks keep relay base assemblies in stock because relay contacts wear after years of cycling.
- Retrofit holdover. During migration to newer Ovation I/O or third-party relay panels, teams keep original 1C31222G01 bases to avoid rewiring entire panels.
FAQ
What is the 1C31222G01?
It is an Ovation high-power relay output base assembly, providing 12 Form X relay channels typically paired with the 1C31219G01 relay output logic module.
What voltage and current can each channel handle?
Each channel is rated for 150 VDC at 10 A for Form X relay outputs. Confirm the actual field load against the relay kit specification before reuse.
Can I use 1C31222G01 without 1C31219G01?
No. The 1C31222G01 is a relay output base assembly, not a standalone controller. It requires the 1C31219G01 relay output logic module to operate.
Is 1C31222G01 the same as 1C31223G01?
No. 1C31222G01 is the high-power Form X / KUEP relay base; 1C31223G01 is a G2R-style relay output base. They are not automatically interchangeable.
What relay kit does it use?
The 1C31222G01 is associated with the KUEP-style relay base and 5A26458G02 Form X relay kit. Verify the installed relay kit against the original unit.
Is this still in production?
It is a legacy Ovation I/O component. Available stock is typically surplus, refurbished, or new-old-stock. Verify condition and relay style before purchase.
What is the warranty on surplus 1C31222G01 bases?
A 1-year warranty is typical for verified surplus stock, covering manufacturing defects and DOA failures. Damage from incorrect wiring, overload, relay contact wear, or mismatched logic modules is not covered.
