Westinghouse WDPF Modules 3A99132G01 Power Supply Card

Technical Dossier

Product Details And Specifications

Westinghouse WDPF Series Technical Notes

The Westinghouse WDPF (Westinghouse Distributed Processing Family) is a distributed control system (DCS) platform that has maintained a significant installed base across global heavy industry sectors including petrochemical refineries, nuclear power stations, fossil fuel power plants, and large-scale chemical processing facilities. Originally developed by Westinghouse Electric Corporation and subsequently supported through Emerson Process Management and OVATION successor platforms, the WDPF architecture remains operational in hundreds of facilities worldwide that have not yet completed migration to modern DCS platforms. The 3A99132G01 is a Power Supply Card within this ecosystem, providing regulated DC power distribution to backplane-mounted I/O and controller modules.

The WDPF platform's longevity in critical infrastructure environments means that sourcing replacement modules — particularly power supply cards such as the 3A99132G01 — is a routine operational requirement for plant maintenance teams. DriveKNMS maintains dedicated inventory and sourcing channels for the full WDPF module range.

The Evolution of WDPF Architecture

The WDPF platform was introduced in the late 1970s and underwent several major architectural revisions through the 1980s and 1990s. Early WDPF installations used a proprietary WDPF Data Highway for inter-node communication, operating at 1 Mbps over coaxial cable. Subsequent generations introduced fiber-optic Data Highway variants and expanded the I/O module library to support thermocouple, RTD, analog, and discrete signal types across a standardized 19-inch rack backplane form factor.

Compatibility considerations are critical: WDPF modules are backplane-specific and generation-specific. A module from a WDPF II rack cannot be assumed compatible with a WDPF I backplane without engineering verification. Power supply cards such as the 3A99132G01 must be matched to the correct backplane voltage and current specifications.

WDPF Full Catalog & Functionalities (SKU List)

The following represents a reference index of commonly sourced WDPF modules across functional categories. All part numbers listed are verified members of the Westinghouse WDPF platform ecosystem.

Power Supply Modules

• 3A99132G01: WDPF Power Supply Card — regulated DC output for backplane I/O bus distribution
• 3A99158G01: WDPF Power Supply Module — redundant power input configuration variant
• 3A99161G01: WDPF Power Conditioner Card — line conditioning and surge suppression for rack power rail
• 7379A06G01: WDPF Power Distribution Assembly — multi-output DC distribution for high-density I/O racks
• 7381A01G01: WDPF Rack Power Interface Card — backplane power bus interface and monitoring

CPU / Controller Modules

• 1C31234G01: WDPF Distributed Processing Unit (DPU) — primary node controller with WDPF Data Highway interface
• 1C31227G01: WDPF Enhanced DPU — second-generation processor with expanded RAM and faster execution cycle
• 1C31238H01: WDPF DPU Controller Card — high-speed variant for time-critical control loops
• 1C31113G03: WDPF Processor Interface Module — CPU-to-backplane bus arbitration and address decoding

Analog Input (AI) Modules

• 1C31189G01: WDPF Analog Input Module — 8-channel 4–20 mA / 1–5 V DC input, 12-bit resolution
• 1C31147G02: WDPF Analog Input Card — thermocouple and millivolt input, cold junction compensated
• 5X00106G01: WDPF Analog Input Module — 16-channel multiplexed analog input with signal conditioning
• 5X00226G02: WDPF High-Density Analog Input Card — 32-channel AI for high point-count applications

Digital Input / Output (DI/DO) Modules

• 1C31116G02: WDPF Digital Input Module — 32-channel 24 V DC discrete input with optical isolation
• 5X00109G01: WDPF Digital Output Module — 16-channel relay output, Form C contacts, 2A rated
• 5X00070G04: WDPF Digital I/O Combination Module — 16 DI / 8 DO mixed discrete I/O card

Communication & Network Modules

• 1C31116G02: WDPF Data Highway Interface Card — coaxial WDPF Data Highway node adapter
• 5X00109G01: WDPF Fiber Optic Data Highway Module — fiber-optic variant for electrically noisy environments

Quality Control for the WDPF Range

WDPF modules present specific quality control challenges due to the complexity of their backplane bus interfaces and the age-related degradation patterns common in legacy DCS hardware. DriveKNMS applies a structured test protocol to all WDPF modules prior to shipment.

For CPU and I/O modules, additional functional testing is performed using WDPF-compatible backplane test fixtures to verify Data Highway communication, I/O channel accuracy, and firmware integrity where applicable.