Description
‑ Power Supply: Powered by excitation rack back‑plane bus
‑ Power Consumption: approx 8.0 W
‑ Mechanical Structure: Eurocard plug‑in board for UNITROL rack, metal front panel, back‑plane bus connector, RJ45 Ethernet external network interface
‑ On‑board Resources: Ethernet physical transceiver circuit, network isolation transformer, surge‑suppression protection unit, data processing logic, back‑plane bus controller, module self‑diagnosis circuit, conformal‑coating protection layer
‑ Communication Interface: Internal dedicated back‑plane bus for excitation main‑control board; external 10/100M Ethernet RJ45 port
‑ Galvanic Isolation: Network channel built‑in isolation transformer, isolation rating 2500 VAC
‑ Supported Protocol: Modbus‑TCP, excitation proprietary Ethernet commissioning protocol
‑ Network Rate: auto‑negotiation 10/100 Mbit/s
‑ Status LED Indicators: Power indicator, Module Fault indicator, network link status LED, send‑receive activity LED
‑ Weight: approx 0.92 kg
‑ Acts as Ethernet communication gateway for UNITROL6000 excitation rack, receives remote parameter setting and operation commands from DCS/HMI/commissioning tool; uploads generator operating data, alarm records, fault event records from main‑control board to upper‑level system over Ethernet.
‑ Supports online parameter configuration, real‑time data monitoring and fault event reading via excitation commissioning software through Ethernet channel.
‑ Built‑in network surge‑suppression and isolation circuit, restrains interference and surge introduced by long‑distance plant network cable.
‑ Module self‑diagnosis monitors rack power‑supply, network transceiver circuit and back‑plane bus communication; detects link fault, hardware circuit abnormality, uploads module‑level fault‑alarm information to main‑control board. Conformal‑coating improves long‑term reliability under harsh site condition.
‑ Cannot run independently; must be installed inside UNITROL excitation rack and cooperate with excitation main‑control board. HENF452750R1 is hardware revision variant of E3EFa series; pin‑compatible within E3EFa revision family, cannot directly interchange with other series excitation boards.
‑ Continuously monitors network link status, module power‑supply and internal hardware health. Detected faults activate fault LED and send fault word to excitation main controller.
‑ No local numerical display; network working status and fault codes are read via excitation commissioning tool or upper‑level HMI workstation.
‑ Module hardware failure will cause loss of Ethernet communication function; excitation AVR regulation and protection logic keep normal running, but Ethernet‑based remote monitoring, parameter downloading and event reading cannot be performed.
‑ Back‑plane connector: connects to excitation rack internal bus, exchanges data and diagnostic status with main‑control board.
‑ RJ45 Ethernet interface: wiring port for plant network shielded network cable.
‑ Mounting: Plug‑in installation inside UNITROL excitation cabinet rack
‑ Operating Temperature: ‑20 °C ~ +60 °C
‑ Storage Temperature：−40 °C ~ +70 °C
‑ Relative Humidity: 5‑95 %RH, non‑condensing
‑ Protection Class: IP20 (cabinet internal)
- E3EFa Ethernet communication interface board (HENF452750R1)
Complementary parts: UNITROL excitation rack and back‑plane, excitation main‑control board, shielded Ethernet network cables, excitation commissioning software.
‑ Power off the whole excitation rack before inserting or removing this board. Network wiring adopts industrial shielded Ethernet cable with single‑end shield grounding; avoid laying in parallel with high‑power power cable.
‑ For spare‑part replacement: Verify complete part number HENF452750R1. After replacement, confirm back‑plane bus identification, verify network link, data transceiving and fault‑reporting function. Hardware revision mismatch will lead to Ethernet communication incompatibility.
‑ Module hardware fault will result in failure of Ethernet‑based remote data interaction.
Thermal‑power and hydro‑power generator excitation cabinets; ABB UNITROL6000 generator excitation system; industrial spare‑part replacement for excitation high‑speed Ethernet communication gateway unit.
- UNITROL6000 excitation system dedicated E3EFa Ethernet communication board, realizes high‑speed Modbus‑TCP and commissioning‑tool network data interaction, hardware variant HENF452750R1.
- Conformal‑coating processing, adapts to power‑plant high‑humidity and corrosive harsh site environment.
- Network channel adopts isolation transformer, strong anti‑interference capability for power‑plant strong electromagnetic‑interference scene.
- Built‑in network self‑diagnosis function, convenient for field network‑loop fault location.
- Standard Eurocard rack‑mount plug‑in structure, convenient installation and on‑site maintenance.
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