Westinghouse WDPF 1X00024H01 WH1-2FF Controller MD Plus

Technical Dossier

Product Details And Specifications

Westinghouse WDPF Series Technical Notes

The Westinghouse WDPF (Distributed Processing Family) is a distributed control system (DCS) platform developed by Westinghouse Electric Corporation and subsequently maintained under Emerson Electric following the acquisition of Westinghouse's process control division. The WDPF platform has accumulated decades of installed base across global heavy industry sectors including petroleum refining, chemical processing, nuclear power generation, and fossil fuel power plants. Its architecture is characterized by a peer-to-peer data highway (WDPF Data Highway, or WDH) that enables deterministic communication between distributed processing units without a central arbitration node. This design philosophy made WDPF a preferred platform for safety-critical and continuous-process environments where communication latency and single-point failure are unacceptable. The 1X00024H01 WH1-2FF Controller MD Plus is a representative controller module within this ecosystem, designed for supervisory and regulatory control functions within WDPF node architectures.

The Evolution of WDPF Architecture

The WDPF platform was introduced in the early 1980s as a response to the limitations of centralized control systems. The initial WDPF I generation established the peer-to-peer data highway concept using coaxial cable infrastructure. WDPF II followed with enhanced processing throughput, expanded I/O density, and improved diagnostics. The MD (Multi-Drop) and MD Plus controller variants, including the 1X00024H01, represent a mature iteration of the WDPF II architecture, incorporating faster scan rates and expanded memory addressing for complex regulatory loops.

Compatibility across WDPF generations is constrained by backplane bus protocol versions. WDPF I and WDPF II modules are not interchangeable without hardware adaptation. The WH1-2FF designation indicates a specific firmware and hardware revision level relevant to node configuration and data highway addressing. As the WDPF platform has entered its end-of-life phase—with Emerson having transitioned support to the Ovation DCS platform—operators of legacy WDPF installations face increasing challenges in sourcing replacement modules. The 1X00024H01 is among the controller modules most frequently required for life extension programs at power generation facilities that have not yet completed migration to Ovation or alternative DCS platforms.

WDPF Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Westinghouse WDPF ecosystem, categorized by functional role. Each module is a discrete field-replaceable unit (FRU) within the WDPF node chassis.

Controllers & Processors

• 1X00024H01: WH1-2FF MD Plus controller module for WDPF II regulatory and supervisory control nodes.
• 1X00093H01: WDPF II enhanced controller module with extended scan cycle support for high-density loop configurations.
• 1C31234G01: Sequence of Events (SOE) processor module; 1ms time-stamp resolution for fault recording.
• 1C31227G01: WDPF II multi-function controller; supports PID, feedforward, and cascade control strategies.

Analog & Digital I/O Modules

• 1C31189G01: 16-channel analog input module; 4–20 mA, 0–10 V configurable per channel.
• 1C31194G01: 8-channel analog output module; 4–20 mA output with loop-back diagnostics.
• 1C31192G01: 32-channel digital input module; 24 VDC, optically isolated, for discrete status monitoring.
• 1C31166G01: 16-channel digital output module; relay-contact type, rated 2A per channel.
• 1C31169G01: 32-channel digital output module; solid-state transistor outputs, 24 VDC.
• 1C31179G01: Thermocouple input module; 8-channel, supports J, K, T, E, R, S type thermocouples with CJC.
• 1C31147G01: RTD input module; 8-channel, supports PT100, PT1000, Ni120 configurations.

Communication & Network Adapters

• 1C31238H01: WDPF Data Highway interface module; coaxial bus transceiver for peer-to-peer node communication.
• 1C31233G01: Serial communication module; RS-232/RS-485 configurable for third-party device integration.
• 5X00226G01: Ethernet gateway module; bridges WDPF data highway to Modbus TCP for SCADA integration.

Power Supply Modules

• 5X00106G01: WDPF node power supply; 24 VDC output, redundant-capable, 20A continuous rating.
• 5X00109G01: Redundant power supply module; hot-swap capable, for high-availability WDPF node configurations.