Technical Specifications Part Number: 2RAA005844A0006A Model: COM0003 System Compatibility: ABB UNITROL 6000 excitation system Interface: RS485 serial port, IRIG‑B time synchronization input, internal backplane high‑speed serial bus Power Supply: Supplied by UNITROL 6000 rack internal backplane Operating Temperature: ‑40 ℃ to +70 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5‑95 %, non‑condensing Mounting Type: Eurocard standard rack plug‑in board Protection Class: IP20 Certifications: CE
Functional Features Realizes high‑speed internal data exchange between main processor and each auxiliary functional board inside UNITROL 6000 rack. Provides RS485 external serial communication interface for data interaction with upper‑level monitoring system. Supports IRIG‑B time synchronization signal input, realizes precise time stamp for system fault record and event log. Built‑in complete communication diagnostic function, monitors frame error, signal loss and communication timeout fault. Front‑panel LED indicators display power‑on, running, bus communication and fault alarm status. Standard Eurocard plug‑in mechanical structure, convenient for on‑site spare‑part replacement.
Application Scenarios UNITROL 6000 generator excitation system communication board spare‑part replacement. Thermal power plant and hydropower plant generator excitation control cabinet internal signal data transmission. Power‑generation unit renovation and excitation‑system hardware upgrading project.
Installation Requirements Align COM0003 circuit board with UNITROL 6000 rack slot guide rail, insert board fully in place and fasten board‑edge locking screw. Connect RS485 communication cable and IRIG‑B time‑synchronization signal cable to front‑side screw‑type terminals. Install terminal matching resistor at both ends of RS485 bus segment according to hardware manual requirement. Complete cabinet protective earthing complying with UNITROL 6000 system grounding specifications. Separate communication signal cables and high‑power power cables inside control cabinet.
Usage Notes Set serial‑port baud‑rate, parity bit and station address to be consistent with upper‑level host equipment. Strictly follow IRIG‑B signal wiring specification for time‑synchronization application. Periodically inspect front‑side terminal fastening condition and cabinet dust accumulation.
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