Description
Product Core Brief
- Model: 1C31222G01
- Brand: Westinghouse / Emerson Ovation lineage, Ovation coming from Westinghouse process control and later produced by Emerson
- Most Credible Description: Ovation relay output base, high power, also listed as a DO PMOD relay output base
- Paired Logic Module: 1C31219G01 relay output logic module, with the pair often sold as a combined relay output card
- Relay Kit Association: Listed as a KUEP style relay output base assembly with 12 channels, using 5A26458G01 for Form C contacts and 5A26458G02 for Form X contacts
- Sibling Base: 1C31223G01, a G2R style relay output base, commonly confused with it
- Not A Card By Itself: The base carries the relays and field terminals, the logic module does the driving, so one without the other does nothing
- Condition: New Original / New Surplus / Refurbished, demand clear nameplate photos
Product Introduction
1C31222G01 is best understood as an Ovation relay output base, high power. Chinese supplier catalogs list it as a DO PMOD relay output base, high power, and show 5A26458G05 as the combined 1C31219G01 plus 1C31222G01 Ovation relay output card. Another catalog lists it as an Emerson Ovation relay output base, high power, sitting next to the 1C31219G01 relay output logic module. Older Ovation card lists also pair 1C31222G01 with 1C31219G01 as a two card combination for relay outputs at 12 points, 150 VDC at 10A, Form X.
The technical table that matches it best describes a relay output base assembly in KUEP style with 12 channels, using 5A26458G01 for a Form C contact and 5A26458G02 for a Form X contact, with auxiliary power around 23.45W typical and 30.1W maximum on the Form C kit, and around 15.9W typical and 20.41W maximum on the Form X kit. That is why the kit number matters as much as the base number, because Form C and Form X behave differently in a trip circuit.
Now the garbage you need to ignore. Several pages describe 1C31222G01 as a relay output module that converts digital signals to relay signals, with 8, 16 or 22 channels, 5A per channel, IP66 or IP65 rating, redundant design, and use in SIS and ESD systems. That is a generic relay module paragraph, and IP66 on an Ovation I/O base inside a cabinet is not a real spec. Other pages call it an Ovation controller, lumped into a catalog of ABB, Honeywell, Foxboro and Yokogawa CPU parts with a two day lead time. It is not a controller. And some list it as a high performance relay output module for high power load switching without ever mentioning the logic module it needs, which is how people end up with a dead loop.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 1C31222G01 |
| Platform | Ovation DCS, Westinghouse and Emerson heritage |
| Most Credible Class | Relay output base, high power, sometimes listed as DO PMOD |
| Paired Logic Module | 1C31219G01 relay output logic module |
| Combined Part | 5A26458G05 listed as 1C31219G01 plus 1C31222G01 relay output card |
| Channel Count | 12 channels listed for the KUEP style relay output base assembly |
| Relay Kits | 5A26458G01 Form C, 5A26458G02 Form X, 5A26458G03 project specific |
| Auxiliary Power | Around 23.45W typical and 30.1W maximum on Form C kit, around 15.9W typical and 20.41W maximum on Form X kit |
| Older Card List Association | 12 point relay output, 150 VDC at 10A, Form X, paired with 1C31219G01 |
| Sibling Base | 1C31223G01 G2R style relay output base |
| Unverified Claims | IP66 or IP65 rating, 22 channels, built in redundancy, acting as an Ovation controller, standalone operation |
| Typical Failure Mode | Stuck or welded relay contact, burned base trace, corroded terminal, blown auxiliary fuse, missing logic module, wrong Form C or Form X kit, no output from a config or scan class mismatch |
| Verification Method | Confirm base, logic module, relay kit, auxiliary supply and field wiring against Ovation documentation and your cabinet drawing |
No confirmed factory datasheet is publicly available for this number alone, so validate voltage, current, contact form and auxiliary power against your own Ovation documentation before energizing.
Quality Control Process
A relay base gets contact and coil testing, not a visual pass.
- Nameplate and suffix match. Confirm 1C31222G01 and not 1C31223G01, since the G2R style base gets swapped in constantly.
- Relay kit confirmation. Verify whether the base carries a Form C 5A26458G01 or Form X 5A26458G02 kit, because trip logic depends on it.
- Logic module confirmation. Confirm the 1C31219G01 is present and healthy, since the base alone cannot drive anything.
- Coil and contact test. Energize each coil and check continuity on the correct contact, watching for welded contacts that stay closed.
- Insulation check. Verify dielectric isolation between relay contacts and logic, since degraded isolation creates ghost signals.
- Auxiliary supply check. Measure the auxiliary supply and confirm it can carry the base load, since a sagging supply causes random dropouts.
- Terminal and base inspection. Look for green corrosion, loose screws, melted plastic around relay pins and cracked clips.
- Live point exercise. Force each output from Ovation and confirm the actual field device reacts, not just the faceplate.
I once saw a plant replace a relay base twice on a pump that refused to stop. Both bases were fine. The Form X kit had been installed where the drawing called for Form C, so the trip logic was inverted the whole time.
Replacement Pitfall Guide
Buying it as a complete relay card. The base needs the 1C31219G01 logic module, and many sellers only list the combined part 5A26458G05
Buying the wrong sibling base. 1C31223G01 is a G2R style relay output base and is not the same as the high power KUEP style base
Ignoring Form C versus Form X. The relay kit defines contact behavior, and swapping kits can invert a trip or start circuit
Believing the IP66 and 22 channel claims. Listings describing IP66 or IP65 protection, 22 channels, redundant design and built in diagnostics are generic relay module marketing
Buying it as a controller. Pages calling it an Ovation controller inside a mixed CPU catalog are wrong
Assuming hot swap is safe on trip loops. Even where modules are hot pluggable, on relay outputs feeding trip, bypass or protection you still need points forced out, a controlled manual takeover and someone watching the field device
Trusting placeholder pricing. Some listings show flat 600 to 666 USD across completely unrelated Ovation parts with a two day lead time, which is a catalog dump rather than a real quote
Keep these in mind and you’ll cut most rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Alternative | Compatibility Level | Migration Notes |
|---|---|---|---|
| 1C31222G01 | Refurbished same part | Needs Verification | Confirm relay kit, logic module, auxiliary supply and every point exercised live |
| 1C31222G01 | 5A26458G05 combined card | Recommended | Listed as 1C31219G01 plus 1C31222G01, removes the risk of buying only half the set |
| 1C31222G01 | 1C31223G01 base | Needs Verification | G2R style relay output base, different relay type and behavior |
| 1C31222G01 | 1C31219G01 logic module | Not Compatible | Logic module, pairs rather than replaces |
| 1C31222G01 | 5A26458G01 or 5A26458G02 kit | Needs Verification | Kit changes contact form between Form C and Form X |
| 1C31222G01 | External relay panel driven by analog or discrete output | Needs Adaptation | Needs wiring redesign, loses native Ovation point diagnostics |
Benchmark references
- Acceptance criterion: every forced point actuates the correct field device with no cross talk to adjacent points.
- Contact target: no welded or sticky contact across repeated fast cycling.
- Stability target: no dropout during a warm cabinet soak and a harness wiggle while outputs are held on.
Procurement Notes
Push for five things before paying: a clear nameplate photo showing 1C31222G01, confirmation of which relay kit is fitted between 5A26458G01 Form C and 5A26458G02 Form X, written confirmation whether you are buying the base only or the combined 5A26458G05 with the 1C31219G01 logic module, your cabinet drawing showing contact form and field voltage, and customs paperwork if it is claimed as imported original stock.
If a seller describes it as an IP66 relay module with 22 channels, or as an Ovation controller, treat the listing as unverified and move on. When one part number gets sold as a base, a card and a controller, the office selling it has never forced a trip point.
