Technical Specifications

Main Features and Advantages

24/48 V DC dual-range flexibility:

Most DCS DI cards commit to one coil voltage, forcing mixed-voltage panels to carry two SKUs. The Westinghouse 1C31232G01​ accepts 24 V DC and 48 V DC on the same 16-channel body — wet (sourced) or dry (contact) — which means a retrofit crew can land legacy 48 V DC MCC aux-feedback and newer 24 V DC prox on the same module without re-laddering the chassis BOM. For WDPF→Ovation migrations especially, this halves the SKU count on the DI row.

Channel-to-channel optical isolation:

Each of the 16 inputs on the Westinghouse 1C31232G01​ rides its own optocoupler, rated for robust channel-to-channel isolation. In a turbine-deck panel where homeruns from different MCCs, different transformer secondaries, and different earth references all terminate on the same DI block, that isolation keeps a ground-loop event on channel 3 from flipping channel 11 or glitching the Ovation backplane. The Westinghouse 1C31232G01​ also carries input-to-ground isolation in the kilovolt class, which matters when the field cable runs parallel to a 4160 V feeder for 50 m.

Hot-swap without controller interrupt:

The Westinghouse 1C31232G01​ is designed for live replacement — pull the faulty unit, seat the new one, the Ovation chassis backplane re-enumerates the module and the controller picks the 16 points back up. On a unit-rated plant where a DI rack sits in a balance-of-plant aux building and the turbine can’t trip for a card swap, that capability moves the Westinghouse 1C31232G01​ from “nice to have” to “specified.” Note: hot-swap assumes the Ovation chassis power and backplane are healthy — if the chassis PS is already marginal, swap with the controller in secondary or during a scheduled clearance.

WDPF / PROVOX migration path:

The Westinghouse 1C31232G01​ is not a WDPF card, but it is the Ovation-native DI that WDPF离散 inputs migrate into. Field wiring (24/48 V DC discrete) from the WDPF panel re-terminates to the Westinghouse 1C31232G01​ terminal block; the Ovation Developer Studio project maps the new module’s point offsets; the old WDPF DI rack is de-racked. For plants doing phased migration (keep WDPF RIO drops alive on Ovation bridge, replace base-rack DI with Westinghouse 1C31232G01), this module is the workhorse SKU — active lifecycle from Emerson, so forward procurement is viable for 5+ year roadmaps.

Diagnostic and LED visibility:

Each channel on the Westinghouse 1C31232G01​ has an LED indicator (standard Ovation DI pattern), so a panel walkthrough answers “is the limit switch actually closing or is the DI not seeing it?” without a laptop. Module-level health LED reports backplane comm and internal diag; if the Westinghouse 1C31232G01​ detects an internal fault (opto array, backplane transceiver), it signals the Ovation controller which can drive a maintenance alarm before the point fully drops. That “fail-reported” behavior is what lets the control-room operator call the electrician with “channel 7 on rack B3 is drifting,” not “B3 rack is dark.”

Environmental headroom:

Rated -40 to +70 °C, the Westinghouse 1C31232G01​ covers freezer-store aux panels (where Ovation serves KR palletizers in cold-chain) through steam-tunnel vestibules where ambient creeps past 60 °C. 5–90 % RH non-condensing matches unconditioned electrical rooms in older plants. IP20 keeps it cabinet-only, which is correct — the Westinghouse 1C31232G01​ lives in the Ovation chassis behind the cabinet door, not in a field enclosure.

Application Field

The Westinghouse 1C31232G01​ is an Ovation base-rack DI, so its application field splits between greenfield Ovation cells and — more visibly — WDPF/PROVOX brownfield migrations. In unit-rated coal/nuclear/gas plants that standardized on WDPF in the 1990s and are now mid-Ovation migration, the Westinghouse 1C31232G01​ populates the new Ovation I/O chassis in the MCR or the balance-of-plant aux buildings. Typical points landed on the Westinghouse 1C31232G01​ include pump “run / fault / trip” aux from MCCs (often 48 V DC dry contact, hence the 48 V range matters), valve limit-switch feedback (24 V DC wet from panel-mounted PSU), burner-management system flame-scan “proof of fire” contacts, and turbine auxiliary interlocks that the Ovation controller needs within one scan. Because the Westinghouse 1C31232G01​ is 24/48 dual-range, the same chassis can mix MCC-dry and PSU-wet points without splitting SKUs — a common pattern in BOP aux panels where the original WDPF design already had that mix.

In refinery and petchem CDU/VDU units that ran Fisher PROVOX and are migrating to Ovation, the Westinghouse 1C31232G01​ lands the 24 V DC discrete field — ESD pushbutton loops, motor-operated-valve limit cams, compressor aux-feedback — re-terminated from the PROVOX marshalling into the Ovation chassis. The hot-swap capability of the Westinghouse 1C31232G01​ matters here because refinery units run 3-shift and an I/O card swap can’t always wait for a turnaround window; the electrician pulls the faulted Westinghouse 1C31232G01​ live, seats the spare, and the Ovation controller re-acquires the 16 points in seconds.

Water/wastewater and biomass cogeneration — smaller Ovation footprints — also use the Westinghouse 1C31232G01​ when the field devices are 24 V DC (float switches, pressure-switch NO/NC, VFD fault relays). The 16-channel density is efficient for skid-mounted Ovation chassis where rack slots are scarce. For spare-parts managers, the application takeaway is straightforward: anywhere the plant has an Ovation base I/O chassis and the field is 24 or 48 V DC discrete, the Westinghouse 1C31232G01​ is on the BOM — and on the critical-spare list for hot-swapable DI.