Description
Product Introduction & Engineering Value
The 1C31238A01 belongs to the legacy Westinghouse/Emerson Ovation hardware family used in distributed control applications. Its exact functional designation should be established from the module label, Ovation hardware documentation, or the installed assembly before it is treated as a direct replacement. Current third-party inventory confirms the part number and Ovation/Westinghouse association, but does not provide enough evidence to safely assign a specific I/O function.
That distinction matters during procurement. With legacy Ovation hardware, visually similar modules can have different field interfaces and different companion electronics. A catalog description that simply calls 1C31238A01 an “Ovation module” is not enough to establish interchangeability.
Technical Specifications
At present, the following information can be stated with reasonable confidence:
- Part number: 1C31238A01
- Manufacturer lineage: Westinghouse / Emerson
- System family: Ovation DCS
- Hardware generation: Legacy Ovation
- Part family: 1C312xx
- Exact module function: Not independently verified
- I/O channel count: Not verified
- Input/output signal type: Not verified
- Rated voltage: Not verified
- Resolution: Not verified
- Associated EMOD/PMOD: Not verified
- Operating temperature: Not verified
The indexed inventory source places 1C31238A01 with other Westinghouse Ovation parts, including 1C31227G01, 1C31224G01, 1C31223G01, 1C31222G01, 1C31219G01, 1C31204G01, and 1C31203G01. That establishes the product-family context but does not establish the technical specifications of 1C31238A01 itself.
Why I am leaving the specifications open
For industrial control hardware, a wrong specification is worse than an incomplete specification.
For example, labeling this part as an 8-channel 4–20 mA module merely because nearby part numbers have that function would create a potentially serious procurement error. The preceding Ovation parts in this series demonstrate that Emerson uses closely related 1C312xx numbers for very different hardware functions.
1C31238A01
Field Application & the “Trench” Experience
Consider a plant maintenance team preparing a scheduled Ovation DCS outage. The cabinet contains a legacy module marked 1C31238A01, and the site’s spare-parts database contains only the part number.
The purchasing department searches the number and finds several reseller listings.
The problem is that the listings do not agree on the technical identity.
This is exactly the situation where a maintenance engineer should stop the automatic substitution process. The original module should be photographed, including the complete nameplate, revision, connector arrangement, and any adjacent EMOD/PMOD markings. The cabinet slot and I/O termination drawing should also be checked.
Appropriate verification scenarios
- Legacy Ovation cabinet audit: establish the exact function of an unidentified installed module before stocking a spare.
- Planned DCS outage: verify whether 1C31238A01 is the complete assembly or one component of an EMOD/PMOD pair.
- Obsolescence planning: identify the exact hardware revision before evaluating refurbished or New Surplus alternatives.
Transparency SOP: QA & Testing
For New Surplus or refurbished 1C31238A01 stock, I recommend a stricter-than-normal receiving inspection.
1. Photograph the actual unit.
The supplier should provide clear photographs of the front label and connector side.
2. Record every marking.
Capture the complete part number, revision, serial number, assembly number, and any PCB markings.
3. Compare the physical interface.
Connector count and mechanical layout should match the installed unit.
4. Identify the companion hardware.
If the module belongs to an EMOD/PMOD architecture, document both components before replacement.
5. Test according to the confirmed function.
Do not apply a generic analog, digital, relay, or communication test until the module’s actual function has been established.
6. Document condition.
For surplus inventory, retain photographs, packaging information, inspection results, and warranty terms.
This approach avoids a common legacy-DCS purchasing failure: receiving a genuine Ovation part number that is nevertheless the wrong functional variant.
The Veteran’s Tech Trap Guide
⚠️ PRO TIP — Do not assign a function from the part-number sequence alone.
1C31238A01 is close numerically to several known Ovation I/O products, but that does not make it interchangeable with them. The available indexed evidence only establishes its Westinghouse/Ovation association.
⚠️ Do not trust a reseller’s generic description without a nameplate photograph.
If a supplier describes this part as an analog input, digital output, communication module, or other specific I/O type, request the technical source supporting that claim.
⚠️ Check the suffix carefully.
The difference between A01, G01, and other suffixes can represent a materially different assembly or revision. Do not replace a legacy Ovation module based only on the numerical root.
PRO TIP: If this is for an actual replacement order, send the supplier a photograph of the installed 1C31238A01 and ask them to confirm the exact function and compatible companion hardware in writing.
Dynamic FAQ
What is Emerson/Westinghouse 1C31238A01?
It is a legacy Westinghouse/Emerson Ovation-series part, but the exact functional designation could not be independently verified from authoritative technical documentation available in the indexed sources.
Is 1C31238A01 an analog-input module?
Do not assume that. I could not verify a reliable source establishing it as an analog-input module.
How many channels does it have?
The channel count is not verified. It should not be populated in a technical product listing until confirmed from the original documentation or module nameplate.
What EMOD or PMOD works with 1C31238A01?
The associated EMOD/PMOD is not verified from the sources available. This should be confirmed before ordering a replacement.
Can I use a similar 1C312xx module as a substitute?
Not without engineering verification. Ovation’s 1C312xx family contains multiple distinct I/O and interface assemblies, so numerical proximity is not sufficient evidence of compatibility.
Can 1C31238A01 be purchased as New Surplus?
Third-party industrial inventory sources list the part number, but condition and warranty must be confirmed with the individual supplier. For a New Surplus purchase, request an actual-unit photograph, complete nameplate information, revision, test evidence, and written warranty.
Start Chat
