Westinghouse WDPF Modules: 5X00376G01

Technical Dossier

Product Details And Specifications

Westinghouse WDPF Series: Comprehensive Module Range and Technical Overview

The Westinghouse WDPF (Distributed Processing Family) is a distributed control system (DCS) platform with a documented installation base across global heavy industry, including petrochemical complexes, nuclear power generation facilities, coal-fired and combined-cycle power plants, and crude oil refineries. Originally developed by Westinghouse Electric Corporation and subsequently maintained under Emerson Electric following the acquisition of the process control division, the WDPF platform remains operational in facilities where replacement of the entire control architecture is not economically or operationally viable. The 5X00376G01 is a representative module within this ecosystem, classified under the WDPF I/O and processing subsystem.

The Evolution of WDPF Architecture

The WDPF platform was introduced in the late 1970s as a modular, rack-based DCS designed for continuous process industries. Its architecture is built around the Westinghouse Data Highway (WDH), a proprietary coaxial token-passing network that interconnects controllers, I/O subsystems, and operator workstations. Early WDPF generations (WDPF I) used dedicated analog and digital I/O cards with fixed addressing. WDPF II introduced enhanced processing nodes and expanded the addressable I/O count. The WDPF+ generation added Ethernet gateway capability and improved diagnostics without altering the core backplane bus protocol, preserving backward compatibility with legacy I/O modules.

Compatibility constraints are significant: WDPF modules are not interchangeable with the successor Ovation DCS platform without hardware and software migration. Sites running WDPF are therefore dependent on the secondary market for spare parts, as Emerson ceased active manufacturing of WDPF-specific hardware. Firmware versions are tied to specific hardware revisions, and substitution of modules across hardware generations requires validation against the site-specific system configuration database (SYSCON).

WDPF Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced components within the Westinghouse WDPF module family. Each entry reflects a distinct functional role within the DCS architecture.

5X00376G01: WDPF analog input module, 16-channel, 4–20 mA process signal acquisition.
5X00119G01: WDPF digital output module, 16-channel, 24 VDC discrete control output.
5X00106G01: WDPF digital input module, 32-channel, dry contact and wet contact compatible.
5X00241G01: WDPF analog output module, 8-channel, 4–20 mA field device command signal.
5X00342G01: WDPF process controller node, primary CPU with WDH network interface.
5X00350G01: WDPF redundant controller module, hot-standby failover configuration.
5X00222G01: WDPF power supply module, 24 VDC regulated, rack-mount form factor.
5X00223G01: WDPF power supply module, 48 VDC variant for extended I/O racks.
5X00178G01: WDPF data highway interface card, coaxial WDH bus termination and arbitration.
5X00179G01: WDPF data highway repeater module, signal regeneration for extended bus runs.
5X00310G01: WDPF thermocouple input module, 8-channel, J/K/T/E type with CJC.
5X00311G01: WDPF RTD input module, 8-channel, PT100/PT1000 three-wire configuration.
5X00290G01: WDPF pulse input module, 4-channel, frequency and totalizer measurement.
5X00410G01: WDPF communication gateway module, Modbus RTU/ASCII serial interface.
5X00411G01: WDPF Ethernet bridge module, 10BASE-T, OPC server connectivity adapter.
5X00155G01: WDPF I/O bus extender module, rack-to-rack backplane signal extension.
5X00156G01: WDPF I/O termination assembly, field wiring marshalling panel interface.

Sourcing Hard-to-Find & Obsolete WDPF Parts

Westinghouse WDPF hardware has been classified as end-of-life (EOL) by Emerson. No new production runs are scheduled. The installed base continues to operate under extended lifecycle maintenance agreements or through independent spare parts suppliers. DriveKNMS maintains a dedicated inventory of WDPF modules sourced from decommissioned plant assets, controlled storage facilities, and verified surplus channels. All units are catalogued by part number, hardware revision, and firmware label where applicable.

For obsolete or low-availability SKUs such as the 5X00376G01, DriveKNMS provides cross-reference validation against the customer's system configuration to confirm hardware revision compatibility before shipment. Emergency same-day quotation is available for critical plant maintenance scenarios. Customers operating WDPF systems under long-term service agreements (LTSA) are advised to establish a strategic spare parts buffer, particularly for controller nodes, power supplies, and data highway interface cards, which represent single points of failure in non-redundant configurations.

Quality Control for the WDPF Range

WDPF modules present specific test challenges due to the proprietary WDH backplane bus protocol and the age-related degradation patterns common to hardware manufactured between 1980 and 2005. DriveKNMS applies a structured inspection and functional test protocol to all WDPF inventory:

Visual inspection covers PCB condition, capacitor integrity (electrolytic capacitor bulge and leakage is a documented failure mode in this hardware generation), connector pin condition, and conformal coating status. Functional testing uses a WDPF-compatible rack test fixture that replicates the backplane bus environment, allowing module initialization, self-diagnostic execution, and I/O channel verification under simulated process conditions. Analog modules including the 5X00376G01 are tested across the full 4–20 mA input range with calibration verification against a traceable reference standard. Digital I/O modules are tested for channel isolation, switching response time, and leakage current. Power supply modules are load-tested at 100% rated current with output ripple measurement. All tested units are issued a test report and shipped with ESD-protective packaging.