ABB 3BHE024577R1101 Excitation System Main Control Processor Board

ABB 3BHE024577R1101 PPC907BE1101 Excitation System Main Control Processor Board
I. Model Basis Explanation
Material Order Number: 3BHE024577R1101
Board Internal Model: PPC907BE1101
Benchmark model of the same series: 3BHE024577R0101 (PPC907BE101), with suffix 1101 indicating upgraded firmware / special configuration version
Product Classification: ABB UNITROL Excitation System Main Control Processor Board (not AC800M DCS, specifically for generator set excitation cabinet)

PPC907BE Motherboard

Product Positioning
UNITROL series synchronous generator excitation regulation core main control board, responsible for excitation closed-loop voltage regulation, reactive power regulation, over-excitation/under-excitation protection, fault recording, communication interaction, and it is matched with hydroelectric/steam turbine generators, diesel generator sets’ excitation control cabinets.

Core Hardware Configuration
Processing Core
Industrial PowerPC high-performance processor, supporting high-speed PID voltage closed-loop, PWM pulse operation, millisecond-level excitation regulation response
Memory Storage
Standard 512MB SDRAM + 2GB onboard Flash; stores excitation parameters, fault event recording, start-stop curves
Front Interface (multiple groups of optical ST interfaces)
Multiple fiber transceiver channels, to issue thyristor trigger pulses, collect power unit status, realize high and low voltage electrical isolation
Communication Bus
Dual redundant Ethernet: connect to upper-level DCS (800xA), touch screen, background monitoring
RS485 Modbus RTU, Profibus DP: external connection to PLC, vibration monitoring, synchronous device
Backplane Internal Bus: connects analog quantity acquisition, power drive board cards
Local I/O Terminal
Collect PT voltage, CT current, fan, temperature, switch quantity interlock signals; output excitation fault, trip, alarm relay contacts

Electrical and Environmental Parameters
Power Supply: Rack backplane DC24V
Overall Power Consumption: ≤4.5W
Operating Temperature: -40℃ ~ +70℃ (power plant excitation cabinet wide temperature condition)
Protection: IP20, standard rack slot installation, supports hot swapping
Weight: Approximately 1.7kg