Description

The WESTINGHOUSE 1C31234G01 is a 32-channel digital input(DI)module designed for the OVATION™Distributed Control System(DCS)—originally developed by Westinghouse Electric Corporation and now maintained and supported by Emerson Automation Solutions following its acquisition of Westinghouse’s automation division.

This module is engineered for mission-critical power generation applications,including fossil fuel,nuclear,hydro,and combined-cycle plants.It interfaces with field devices such as limit switches,relay contacts,auxiliary contacts on breakers,and pressure/temperature alarms,converting real-world binary states into digital data for the OVATION controller.The 1C31234G01 uses 48 VDC wetted inputs(meaning it supplies 48 VDC to the field circuit),providing high noise immunity in electrically noisy environments like turbine halls or switchyards.

Each channel features optical isolation,and inputs are grouped into four banks of eight channels,each with independent diagnostic LEDs.The module supports hot-swap replacement in redundant or online systems,minimizing downtime during maintenance.

Application Scenarios

At a U.S.nuclear power station undergoing life extension,engineers needed to replace aging DI cards in the reactor coolant pump monitoring system.The 1C31234G01 was selected due to its proven safety pedigree,compatibility with existing OVATION logic,and ability to detect open-circuit faults(via wetting voltage monitoring).During a refueling outage,technicians swapped modules without powering down the controller—thanks to hot-swap support—and validated all 32 channels using built-in loop-test functionality.Over the next decade,zero spurious trips were attributed to this I/O layer,demonstrating why Westinghouse-designed hardware remains trusted in safety-significant roles.

Parameter

Main Parameters Value/Description

Product Model 1C31234G01

Manufacturer Westinghouse Electric(now Emerson)

Product Category 32-channel digital input(DI)module

Compatible System OVATION™DCS(all generations,including OVATION Expert)

Input Type Wetted(sourcing)48 VDC–module supplies voltage to field

Number of Channels 32(grouped as 4×8 channels)

Input Voltage Range 30–60 VDC(nominal 48 VDC)

Input Current(per channel)~4 mA(typical when closed)

Contact Type Supported Dry contacts(e.g.,relay,switch)or solid-state outputs rated for 48 VDC

Electrical Isolation Opto-isolators per channel;500 Vrms between field and logic

Diagnostic Features

–32 green LEDs(one per channel:ON=input active)

–4 yellow group fault LEDs(indicate loss of wetting voltage or open wire)

Response Time≤10 ms(programmable filter options in OVATION software)

Operating Temperature 0°C to+60°C

Mounting Slide-in module for OVATION I/O chassis(e.g.,1C31199 or 1C31200 base)

Power Supply Powered via OVATION backplane(±15 VDC and 5 VDC)

Certifications UL 61010-1,CSA,CE,IEEE 472(surge immunity),RoHS compliant

Redundancy Support Yes–compatible with redundant OVATION controllers and I/O buses

Note:“Wetted”means the module provides the 48 VDC power—field devices only need to close the circuit(like a simple switch).This enables open-wire detection.

Technical Principles and Innovative Values

Innovation Point 1:Built-In Open-Wire Detection–Loss of 48 VDC return current triggers a group fault LED and OVATION alarm,preventing undetected signal failures.

Innovation Point 2:High Noise Immunity–48 VDC wetting reduces susceptibility to ground loops and EMI compared to 24 VDC systems.

Innovation Point 3:Seamless Emerson Transition–Fully supported in modern OVATION engineering tools(e.g.,Ovation Developer Studio).

Innovation Point 4:Lifecycle Stability–Despite being legacy-design,Emerson continues firmware and hardware support due to installed base in critical infrastructure.

Application Cases and Industry Value

Fossil Power:In a coal-fired plant,the 1C31234G01 monitored soot blower limit switches—its wetted inputs prevented false“retracted”signals caused by cable degradation in high-heat ducts.

Hydroelectric:Used to detect wicket gate position feedback via proximity switches;48 VDC ensured reliable operation over 500-meter cable runs.

District Energy:Integrated into a cogeneration plant’s emergency shutdown system,where regulatory auditors accepted its fault-detection capability as part of the safety argument.

Related Product Combination Solutions

OVATION Controller(e.g.,1C31161):Host processor for I/O modules like 1C31234G01.

I/O Base Unit(e.g.,1C31199G01):Chassis that houses the DI module and connects to backplane.

1C31235G01:Companion 32-channel digital output(DO)module(relays or solid-state).

1C31181G01:Analog input module for temperature/pressure signals in same system.

Emerson DeltaV:Can coexist via OPC;OVATION handles boiler/turbine,DeltaV manages balance-of-plant.

ABB System 800xA:Often interfaced in hybrid plants using Modbus TCP gateways.

Phoenix Contact PLC-RSC:External interposing relays(rarely needed due to robust design).

SEL-3505 RTAC:Used to bridge OVATION data to modern SCADA via DNP3 or IEC 61850.

Installation,Maintenance,and Full-Cycle Support

Installation:

Insert 1C31234G01 into compatible OVATION I/O base(e.g.,1C31199).

Secure with retention latch.

Connect field wires to removable screw terminals(AWG 14–22 recommended).

Ensure shield grounded at one end only to avoid ground loops.

Maintenance:

Monitor LEDs during operation:green=active,yellow=fault.

Use OVATION diagnostics to check for“stuck”or“chattering”inputs.

Replace if group fault persists after verifying field wiring.

Expected service life:15–20 years in controlled environments.

We supply tested,original WESTINGHOUSE/Emerson 1C31234G01 modules,including:

✅Factory-new surplus(where available)

✅Refurbished units with full functional test reports

✅Cleaned,reconditioned,and firmware-verified hardware

✅12-month warranty and technical datasheets

Note:While branded“Westinghouse,”this module is fully supported under Emerson’s OVATION product line.

Obsolescence&Migration Advisory

The 1C31234G01 remains active in Emerson’s portfolio due to widespread use in power generation.However,for new projects,Emerson recommends the OVATION I/O Series 3(e.g.,1C31234G04)with enhanced diagnostics and cybersecurity.

For existing users:

✅Maintain spares inventory

✅Document terminal wiring and tag mappings

✅Leverage Emerson’s OVATION Asset Suite for predictive I/O health monitoring

Contact us for cross-references,configuration backups,or lifecycle planning for your WESTINGHOUSE 1C31234G01 in OVATION systems.Ensure your digital inputs remain reliable,diagnosable,and always connected—with industrial heritage you can trust.

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选择深圳长欣，选择放心，售后无忧 大量现货，当天顺丰发货！！！