ABB 3BHB000272R0101 UFC719‑AE101 IOEC I/O Excitation Control Board for Unitrol Excitation System

Description

ABB 3BHB000272R0101 UFC719‑AE101 IOEC I/O Excitation Control Board for Unitrol Excitation System

Product Details

The 3BHB000272R0101, alias model UFC719‑AE101, is IOEC I/O interface board dedicated for ABB Unitrol generator excitation systems. Origin: Switzerland. Lifecycle status: EOL discontinued, OEM new production stopped; market supplies are NOS surplus stock and fully tested refurbished units for power‑plant maintenance.

This board handles field signal acquisition, digital/analog I/O processing, interlock logic and internal bus communication inside Unitrol excitation cabinet. It receives generator‑side auxiliary signals, excitation system status feedback, external interlock contacts; performs signal conditioning and transmits data to main controller board (UFC921A101 3BHE024855R0101). Power supply 24 VDC, power consumption approx 15W, operating temperature 0℃ ~ +60℃. Multiple hardware revisions exist; revision must match original hardware during replacement to avoid incompatibility. Partial units come with conformal coating for high‑humidity power‑plant cabinet environment. Weight approx 0.54 kg.

Applications

‑ Thermal‑power / hydro‑power plant Unitrol excitation cabinet I/O signal processing ‑ Synchronous generator excitation system spare‑part replacement ‑ Cogeneration plant and industrial large‑generator excitation rack maintenance ‑ Power‑plant AVR system interlock & status signal acquisition ‑ Retrofit and component swap for legacy ABB Unitrol excitation equipment ‑ Spare inventory for power‑plant electrical maintenance department

3BHB000272R0101

Related Series Models (6+)

1. UFC719‑AE01 (3BHB000271R0101)
2. UFC921A101 (3BHE024855R0101 Main control board)
3. 3BHE025541R0101 UFC092AE01
4. UFC718AE01
5. 3BHE019719R0101
6. UNITROL 1000 series accessories
7. 3BHB000286R0101

Key Features

1. Dedicated IOEC I/O board for ABB Unitrol excitation system, responsible for field‑side signal conditioning and interlock signal handling.
2. Collects external excitation‑system interlock contacts, generator auxiliary status, analog measurement signals.
3. Realizes high‑speed internal bus data exchange with excitation main control CPU board.
4. Supports hardware interlock protection logic, participates in excitation fault trip chain.
5. Some versions with conformal coating, suitable for dusty, high‑humidity power‑plant cabinet environment.
6. 24 VDC powered, compact cabinet‑slot installation inside Unitrol rack.
7. Multiple hardware revisions; strictly verify revision number before on‑site replacement.
8. Manufactured in Switzerland, CE certified; EOL obsolete, only NOS or fully‑tested refurbished spare‑parts available.

Main Functions

1. Acquire digital input signals: excitation system external interlock, breaker status, protection relay contact feedback.
2. Process analog auxiliary signals inside excitation cabinet, complete signal conditioning and isolation.
3. Output relay signals for excitation fault alarm, trip indication and status feedback to plant DCS.
4. Transmit collected field data to main AVR control board via internal IOEC bus.
5. Participate in hardware safety interlock chain; trigger related protection action under abnormal excitation conditions.
6. Convert cabinet‑level status signals into bus data for parameter monitoring and fault‑log recording.
7. Cooperate with UFC921A101 main control board to build complete Unitrol excitation control hardware architecture.
8. Serve as field‑signal interface unit inside ABB Unitrol generator excitation cabinet.