Description
Auxiliary supply: 24 V DC, support 9‑36 V DC wide‑range input
Power consumption: ≤22 W
Binary I/O: Multi‑group isolated digital input and relay output channels for cabinet status collection, trip and alarm signal output
Communication interfaces: Back‑plane internal bus for AC800PEC rack; multiple configurable RS232/RS485 serial ports, baud rate up to 115.2kbit/s, electrical‑isolation design for each serial channel.
Mounting mode: rack plug‑in module for excitation cabinet AC800PEC rack
Operating temperature: ‑10 ℃ ~ +70 ℃
Storage temperature: ‑40 ℃ ~ +85 ℃
Humidity: 5‑95 %RH non‑condensing
EMC compliance: IEC 61000‑4 series industrial electromagnetic compatibility standards
Dimension & weight: approx. 373 × 73.5 × 142 mm, weight about 1.5 kg
Certifications: CE approval
Collect massive cabinet‑site binary status signals: breaker position, cabinet door switch, cooling‑fan status, cooling‑water flow and temperature‑switch signals.
Output relay contact signals for excitation system fault alarm, trip command and interlock signal transmission to external hard‑wired loop.
Provide multi‑channel isolated RS232/RS485 serial communication interfaces, connect local HMI panel, printer, third‑party intelligent instrument and other serial devices.
Complete data exchange with main control board through AC800PEC back‑plane bus, transmit I/O status and serial‑port data to main control unit.
Support disturbance‑signal forwarding and local status indication through front‑panel LED lamps.
Hardware self‑diagnosis detects internal circuit and channel fault, report fault information to main control board.
Configuration and parameter setting are completed by UNITROL Configurator and Control Builder M engineering software.
Plug‑in installation inside AC800PEC rack of excitation cabinet. High‑power cables and weak‑signal sampling cables shall be laid separately, ensure cabinet grounding is reliable. Auxiliary 24 V DC power supply must be within rated working range. After board replacement, confirm hardware version matches original project configuration, download complete excitation configuration file. Complete binary‑I/O point‑to‑point test, serial‑port communication debugging, signal‑loop verification. This board must cooperate with main control board, cannot work alone. Confirm no hardware self‑diagnosis fault alarm before putting into operation.
Expansion communication‑I/O interface board for UNITROL6000/6800 static excitation system of medium‑large synchronous generators in thermal‑power plants, hydropower plants and nuclear‑power plants, used for excitation cabinet maintenance and spare‑part replacement.
- Special communication‑I/O expansion board for AC800PEC excitation platform, provide abundant isolated serial‑port and binary‑I/O resources.
- Multi‑channel configurable RS232/RS485 serial interfaces, convenient for docking local panel and third‑party serial equipment.
- Isolated relay output channels, reliable for hard‑wired alarm and trip‑signal output.
- Realize high‑speed data interaction with main control board via rack back‑plane bus.
- Rack plug‑in structure, convenient for on‑site replacement and maintenance; hardware version matching shall be noticed during replacement.
- Common spare‑part for ABB UNITROL6000/6800 excitation system maintenance and retrofitting.
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