ABB PCD231B101 | 3BHE025541R0101

Basic Identification

Model: PCD231B101

Part Number: 3BHE025541R0101

Manufacturer: ABB

Product Type: Controller Processor Module / CPU Unit

Applicable System: UNITROL 5000 / 6000 Excitation System, PEC80, AC 800M, System 800xA

General Description

PCD231B101 is a high-performance main processor module used in ABB generator static excitation systems and process control racks. It undertakes real-time closed-loop regulation, AVR control, protection logic calculation, sequence control and system communication tasks. The module supports redundant configuration, hot swap and online diagnosis, widely deployed in thermal power, hydropower and heavy industrial automation sites.

Technical Specifications

Core Performance

Processor: 32-bit high-speed real-time CPU

Execution cycle: High deterministic control cycle for excitation regulation

Supports system redundant synchronization & bumpless switchover

Electrical

Supply voltage: 24 VDC (rack backplane powered)

Power consumption: Moderate industrial grade power rating

Isolation: Internal signal isolation between control and field circuit

Communication

Onboard fieldbus interface

Compatible with ABB internal rack bus

Supports communication expansion via CI series interface modules

Environmental

Operating temperature: 0 °C ~ +55 °C

Storage temperature: −40 °C ~ +85 °C

Relative humidity: 5% ~ 95% RH, non-condensing

Protection class: IP20

Industrial EMC & power plant environment adaptation

Mechanical & Installation

Standard ABB cabinet rack mounting

Hot swappable design

Supports 1+1 redundant configuration

Key Features

Dedicated main CPU for ABB UNITROL excitation system.

Real-time high-precision AVR and excitation closed-loop control.

Complete fault diagnosis, self-test and LED status indication.

Supports hot swap and redundant parallel operation.

Strong anti-interference, suitable for power plant harsh industrial environment.

Application

Generator excitation control system, power plant DCS, process automation and heavy industry control system.