Westinghouse WDPF Modules: 1P00028G01

Technical Dossier

Product Details And Specifications

Westinghouse WDPF Series: Comprehensive Module Range and Technical Overview

The Westinghouse WDPF (Westinghouse Distributed Processing Family) is a distributed control system (DCS) platform that has maintained a critical installed base across global heavy industry for over four decades. Deployed in chemical processing plants, nuclear power stations, petroleum refineries, and pulp and paper facilities, the WDPF architecture remains one of the most widely referenced legacy DCS platforms in long-cycle industrial operations. Its modular backplane design, deterministic scan cycle, and redundant communication bus made it the engineering standard of choice for facilities requiring continuous, uninterrupted process control. The 1P00028G01 Transition Panel is a key interconnect component within this ecosystem, providing the physical and electrical interface between WDPF I/O modules and field wiring terminations.

The Evolution of WDPF Architecture

The WDPF platform was introduced in the late 1970s as a response to the limitations of centralized analog control. The original WDPF I generation established the Westinghouse Data Highway (WDH) serial bus as the backbone for inter-node communication, operating at 1 Mbit/s across a coaxial trunk. WDPF II introduced enhanced processing nodes (WEStation), improved redundancy options, and expanded I/O density per chassis. WDPF+ (also referred to as WDPF Enhanced) extended the platform lifecycle with Ethernet gateway support and Windows-based operator interface compatibility, enabling integration with modern SCADA and historian systems without requiring full DCS replacement.

Compatibility across generations is a primary engineering concern for maintenance teams. WDPF I modules are generally not hot-swappable into WDPF II chassis without verifying backplane revision levels. Transition panels such as the 1P00028G01 serve as the critical wiring interface layer, and their revision must match the associated I/O module generation. Facilities operating mixed WDPF I and WDPF II hardware must maintain accurate revision records to avoid field wiring conflicts during module replacement.

WDPF Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Westinghouse WDPF platform. Each module is classified by functional category:

Controllers & Processors

• 1C31234G01: WDPF Ovation Controller Module — primary process control execution node
• 1C31227G01: Sequence of Events (SOE) Controller — high-resolution timestamping for event logging
• 1C31233G01: WDPF Enhanced Controller — dual-redundant CPU node for critical loop control

Analog Input / Output Modules

• 1C31189G01: Analog Input Module, 16-channel, 4–20 mA — field transmitter signal acquisition
• 1C31194G01: Analog Output Module, 8-channel, 4–20 mA — control valve and actuator command output
• 1C31197G01: High-Level Analog Input Module — thermocouple and RTD signal conditioning
• 1C31192G01: Analog Input Module, 32-channel — high-density field signal aggregation

Digital Input / Output Modules

• 1C31238G01: Digital Input Module, 32-channel, 24 VDC — discrete field device status monitoring
• 1C31116G01: Digital Output Module, 16-channel, relay contact — field device switching and interlock execution
• 1C31169G01: Digital Input Module, 16-channel, 120 VAC — high-voltage discrete signal acquisition
• 1C31179G01: Digital Output Module, 32-channel, solid-state — high-cycle-rate discrete output control

Communication & Network Adapters

• 1C31166G01: WDPF Data Highway Interface Module — WDH bus node communication adapter
• 5X00070G01: Ethernet Communication Gateway — WDPF-to-Ethernet protocol bridge for historian integration
• 5X00106G01: Serial Communication Module — RS-232/RS-485 interface for third-party device integration

Power Supply & Transition Components

• 7379A06G01: WDPF Chassis Power Supply Module — regulated 24 VDC backplane power distribution
• 1P00028G01: Transition Panel — field wiring termination interface for WDPF I/O module chassis

Sourcing Hard-to-Find & Obsolete WDPF Parts

Westinghouse formally transitioned the WDPF platform to Emerson (following the Ovation acquisition) and subsequently discontinued active manufacturing of most WDPF I and WDPF II hardware. The majority of WDPF modules are now classified as end-of-life (EOL) or obsolete by the OEM, with no new production runs planned. This creates a critical supply gap for facilities operating WDPF-based control systems under long-term maintenance agreements or regulatory compliance frameworks that prohibit full DCS replacement without extensive revalidation.

DriveKNMS maintains a dedicated inventory of tested WDPF spare parts, including transition panels, I/O modules, controllers, and communication adapters. Our sourcing network covers decommissioned plant inventories, authorized surplus channels, and direct procurement from facilities undergoing DCS migration. For obsolete part numbers not listed in our standard catalog, we offer a custom sourcing service with a typical lead time of 5–15 business days. Contact our technical team with your full BOM or part number list for availability confirmation.

Quality Control for the WDPF Range

WDPF modules present specific testing challenges due to their proprietary backplane bus protocol and multi-layer PCB construction. DriveKNMS applies a structured quality control process for all WDPF inventory:

• Visual Inspection: Component-level examination for capacitor degradation, corrosion on edge connectors, and PCB trace integrity — common failure modes in modules stored in high-humidity environments.
• Backplane Communication Test: Each module is seated in a live WDPF test chassis and verified for correct WDH bus enumeration and data exchange.
• Functional I/O Verification: Analog modules are tested against calibrated signal sources; digital modules are verified for correct switching logic and isolation resistance.
• Transition Panel Continuity Check: Transition panels including the 1P00028G01 are tested for terminal-to-backplane continuity, correct pin mapping, and absence of intermittent contact faults.
• Burn-In Cycle: Selected modules undergo a 24-hour powered burn-in cycle to screen for early-life component failures prior to shipment.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.