ABB UNS0122A‑P 3BHE042393R0101 Analog Interface Board

Technical Specifications

Model: UNS0122A‑P

Part Number: 3BHE042393R0101

Brand: ABB

Product Type: Analog signal interface board

Matching System: ABB UNITROL1005 Excitation System

Power Supply: Rack backplane 24VDC

Signal Type: Analog signal acquisition and conversion

Communication: Internal rack backplane bus

Installation: Standard excitation rack slot‑in mounting

Operating Temperature:‑20℃ ~ +70℃, non‑condensing

Protection Class: IP20

Weight:0.50kg

Dimension:215mm ×103mm ×20mm

Compatible System: Thermal power, hydropower generator excitation cabinet

Core Function: Special analog signal interface board for UNITROL1005 excitation system. It completes conditioning, isolation and transmission of generator voltage, current analog signals, transmits processed signal data to main control board, provides real‑time sampling data for excitation regulation logic, supports generator voltage closed‑loop adjustment and protection function execution.

Product Details

The UNS0122A‑P 3BHE042393R0101 is analog signal interface board for ABB UNITROL1005 generator excitation system.

This plug‑in board is installed inside UNITROL1005 excitation rack and connects to system backplane bus. It is responsible for receiving generator PT voltage and CT current sampling signals, performing signal filtering, isolation and conditioning processing, and sending stable analog sampling values to the main control board for AVR voltage regulation, current limitation and fault judgment. It acts as signal transmission link between excitation power unit and main control unit, directly affects sampling accuracy and control stability of the whole excitation equipment.

Front‑panel LED status indicators display module power‑on and channel fault information for fast on‑site inspection. Built‑in signal self‑diagnosis function can detect signal loss and channel abnormality, and upload alarm information to excitation system. Conformal coated circuit board improves anti‑interference performance, adapts to harsh electromagnetic environment of power‑plant site.

It belongs to important spare‑part of UNITROL1005 excitation device, widely used in overhaul and renovation projects of thermal power and hydropower generating units.

It is important spare hardware for excitation analog sampling loop debugging and defective UNS0122A‑P board replacement.