ABB PCD235A PEC80-CIOFU 3BHE032025R0101 Excitation System Control Power Board

ABB PCD235A (PEC80-CIOFU) 3BHE032025R0101 Product Details

I. Basic Parameters
Model Name: PCD235A (PEC80-CIO-FU)
Original Factory Part Number: 3BHE032025R0101 (PCD235A101)
Applicable Platform: ABB AC800PEC Excitation Control System (Unitrol Series Generator Excitation)
Equipment Position: Comprehensive I/O Control Unit (CIO Interface Master Control Module), AVR Excitation Regulation Core Signal Acquisition, Logic Control, External Interface Hub

Hardware I/O Configuration
Digital Input: 12 channels
DC24V/48V Photoelectric Isolated Input, for collecting circuit breaker position, local/far control, fault feedback, excitation switch status
Relay Output: 16 channels
Passive Contacts, used for tripping, alarm, fan, rectifier bridge switching, local indicator light driving
Analog Input: 3 channels
±10V / 4-20mA, for collecting generator terminal voltage, excitation current, reactive power, etc.
Analog Output: 3 channels
±10V, for outputting regulation instructions to power rectifier trigger board (e.g. GDB021BE05), central control metering transducer signal

Communication and Hardware Composition
High-speed Fiber Optic Communication: 10MBd Fiber Link, for real-time interaction and regulation pulse with the main control and power unit
Isolated RS485 Bus: Connected to the central control, excitation touch screen, fault recording device
Internal Integrated Components: FPGA Main Control Board PDD205A, Power Module KUD210A, Optical Communication Module UFD202A, Terminal Interface Board UCD208A
Power Supply: Redundant DC24V (20-28V), Maximum Working Current 2A, Supports Dual Power Supply Hot Standby to Prevent Power Failure

Core Functions
Collect terminal voltage, excitation current, switch position signals, to realize AVR automatic voltage regulation, PSS Power System Stability Control
Output thyristor gate trigger regulation instructions, drive rectifier side drive board GDB021BE05 to complete excitation current closed-loop regulation
Realize all interlock logic, fault alarm, over-excitation / under-excitation / rotor overcurrent protection logic judgment of the excitation system
Upload operating parameters, fault events, recording data to the background monitoring system, support IEC60870-103, Modbus, etc. communication protocols
Support dual-machine redundant configuration, seamless switching of master and slave modules, ensuring uninterrupted operation of the generator excitation system