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ABB UFC921A101 | 3BHE024855R0101 UNITROL 5000 Excitation Controller

The ABB UFC921A101 (3BHE024855R0101) is a high-performance control/interface board for UNITROL 5000 excitation systems, ACS drives, and Advant Master DCS. It delivers precise closed-loop control for generator voltage/reactive power and motor speed/torque with millisecond response. Featuring 24V DC operation, rich analog/digital I/O, and multi-protocol communication (Profibus DP, Modbus), it operates reliably in harsh industrial environments (–25°C to +70°C). Hot-swappable and conformal-coated for durability. A critical spare part for power generation, oil & gas, and industrial automation.

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Technical Parameters (English)

  • Model: UFC921A101

  • P/N: 3BHE024855R0101

  • Type: Excitation Control Module / Interface Board / INT-2 Control Board

  • Compatible Systems: ABB UNITROL 5000 Excitation System, ABB ACS Inverters, Advant Master DCS

  • Supply Voltage: 24V DC

  • I/O Specs:

    • Analog Inputs: 8 channels (0–10V, 0–20mA, 4–20mA)

    • Analog Outputs: 4 channels (0–10V, 0–20mA, 4–20mA)

    • Digital I/O: 24V DC (configurable)

  • Communication: Masterbus 300, Profibus DP, Modbus, CANopen

  • Operating Temp: -25°C to +70°C

  • Storage Temp: -40°C to +85°C

  • Humidity: 5–95% RH (non-condensing)

  • Dimensions: 333 × 160 × 28 mm

  • Weight: 0.34 kg

  • Protection: IP20

  • Features: Hot-swappable, conformal coating, dual-channel AVR (excitation)

  • Certifications: CE, UL, CSA

  • Applications: Generator excitation control, inverter control, process DCS