Description
Product Introduction & Engineering Value
The 1C31223G01 is the mechanical relay-base portion of an Ovation relay-output module. It contains 16 Form C G2R-style relays, with the relay contacts brought out to terminal blocks for field connections. The base works with the separate 1C31219G01 electronics module, which provides the interface between the Ovation controller and the relay circuitry.
That separation matters during replacement. The 1C31223G01 is not simply a 16-channel electronic output card. It is the relay base assembly. Emerson’s documentation also distinguishes it from the 1C31222G01 12-relay KUEP base, which has different relay characteristics and switching capability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 1C31223G01 |
| Manufacturer | Emerson / Westinghouse |
| Platform | Ovation DCS |
| Module Type | Relay Output Base Assembly |
| Relay Quantity | 16 |
| Relay Style | G2R |
| Contact Configuration | Form C |
| Output Type | Electromechanical relay |
| Associated Electronics Module | 1C31219G01 |
| Base Fuse | EX06104 |
| Fuse Rating | 1.0 A, 250 V, fast acting |
| Mounting / Interface | Relay base with terminal-block field connections |
The Ovation reference manual states that the 1C31223G01 contains 16 Form C G2R-style relays and that each relay’s Form C contact arrangement is brought to terminal blocks for user connections.
The same manual identifies EX06104 as the 1.0 A, 250 V fast-acting fuse used with the 16-G2R relay base.
Relay Output Architecture
The Ovation relay-output subsystem consists of more than the base alone:
Ovation Controller → 1C31219G01 Electronics Module → 1C31223G01 Relay Base → 16 Form C Relay Contacts → Field Loads
The 1C31219G01 handles the controller-side interface and relay-output logic, while the 1C31223G01 provides the physical relay switching assembly.
This architecture is why a replacement quotation should identify whether the customer needs the base assembly, electronics module, individual relay, or complete relay-output subsystem.
1C31223G01
1C31223G01
Field Application & the “Trench” Experience
A common outage problem involves one relay output refusing to energize. The operator sees a command in the DCS, but the associated field contactor or solenoid does not respond.
The easy assumption is that the Ovation output card has failed.
Not necessarily.
With a 1C31223G01, the control path includes the 1C31219G01 electronics module, relay coil circuitry, mechanical relay contacts, terminal connections, and field wiring. A failed mechanical contact, relay coil, fuse, or terminal connection can produce a symptom that looks like an electronic-module failure.
That is why an engineer should isolate the failure point before replacing the entire assembly.
Specific application scenarios
- Motor starter interlocks: relay contacts used to issue or permit discrete commands to motor-control circuits.
- Solenoid-operated valves: switching control power to field solenoids where relay isolation is required.
- Boiler auxiliary equipment: discrete commands for pumps, dampers, contactors, or permissive circuits.
The exact load voltage and current must be checked against the installed relay and project documentation. Do not assume a generic marketplace contact rating applies to every installed configuration.
Transparency SOP: QA & Testing
For New Surplus or refurbished 1C31223G01 inventory, inspection should focus on the mechanical relay assembly as well as the electrical interface.
1. Part-number verification
Confirm:
1C31223G01
Do not accept a visually similar relay base merely because it has 16 relays.
2. Relay inspection
Check all 16 relay positions for:
- Cracked housings
- Loose relays
- Corroded contacts
- Discoloration from overheating
- Damaged sockets
- Missing or incorrect relay components
3. Fuse verification
The reference manual identifies EX06104, 1.0 A / 250 V fast acting, for the 16-G2R relay base. Verify the installed fuse against the project documentation before energizing the assembly.
4. Contact testing
Test each Form C relay for:
Coil energization → common contact → normally open contact → normally closed contact
Do not test only one channel and assume the remaining 15 are identical.
5. Complete assembly test
Where possible, test the 1C31223G01 together with the 1C31219G01 electronics module and representative field loads. This verifies the actual controller-to-relay signal path rather than merely proving continuity through the mechanical base.
6. QA documentation
For surplus inventory, record the exact part number, relay configuration, physical condition, test results, packaging status, and warranty.
One current supplier advertises a 12-month warranty, while Classic Automation lists a 2-year warranty on its used/refurbished inventory. Those are supplier warranties, not evidence of an OEM warranty.
The Veteran’s Tech Trap Guide
⚠️ PRO TIP — Don’t confuse 1C31223G01 with 1C31222G01.
Both are Ovation relay bases, but they are not the same assembly.
- 1C31223G01: 16 Form C G2R-style relays
- 1C31222G01: 12-relay KUEP-style base
The reference manual specifically notes that the KUEP base has different switching characteristics and can provide higher DC switching capability than the G2R base.
⚠️ The base is not the electronics module.
The 1C31219G01 is the Relay Output Electronics Module. The 1C31223G01 is the 16-relay base assembly. Ordering one when the other has failed will not solve the problem.
⚠️ Don’t assume all 16 relays are healthy because the assembly looks clean.
Mechanical relay contacts can fail from arcing, oxidation, contact welding, or repeated switching. Test the individual channels when the application is critical.
PRO TIP: If a single output is intermittent, inspect the relay contact path before replacing the Ovation electronics module. A mechanical relay failure can mimic an I/O logic problem.
Dynamic FAQ
What is Emerson 1C31223G01?
It is an Ovation Relay Output Base Assembly configured with 16 Form C G2R-style relays.
How many relays does 1C31223G01 contain?
It contains 16 relays. Each relay provides a Form C contact arrangement that is brought to the field terminal blocks.
What electronics module works with 1C31223G01?
The Ovation reference manual identifies 1C31219G01 as the Relay Output Electronics Module associated with the relay-output subsystem.
What is the difference between 1C31223G01 and 1C31222G01?
The 1C31223G01 uses 16 G2R-style Form C relays, while 1C31222G01 is a 12-relay KUEP-style base. The KUEP version has different switching characteristics.
What fuse is used with 1C31223G01?
The Ovation I/O reference manual identifies EX06104, a 1.0 A, 250 V fast-acting fuse, for the 16-G2R relay base. Always verify the actual project documentation before replacing a fuse.
Is 1C31223G01 available as New Surplus?
Yes. Current industrial suppliers list the part in new, unused, used, and refurbished conditions. However, supplier descriptions and warranties vary, so procurement should require the exact part number, actual-unit photographs, condition declaration, test status, and written warranty.
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