ABB UCD224A103 3BHE023681R0103 Control Interface Board 

Technical Specifications

Model: UCD224A103

Part Number: 3BHE023681R0103

Brand: ABB

Product Type: High‑speed control interface board

Matching System: ABB UNITROL 6000 Excitation System, MEGADRIVE‑LCI

Power Supply: System backplane power supply

Processor: On‑board FPGA for high‑speed signal calculation

Communication: High‑speed optical fiber interface, internal backplane bus

Installation: Standard rack slot mounting

Operating Temperature: ‑5℃ ~ +70℃, non‑condensing

Protection Class: IP20

Weight: 0.62kg

Dimension: 233mm ×160mm ×30mm

Compatible System: Power plant generator excitation cabinet, static frequency conversion equipment

Core Function: Special high‑speed signal processing and control interface board for UNITROL 6000 excitation system. It collects analog feedback signals from power unit, completes high‑speed algorithm calculation, outputs precise thyristor firing pulse signals, realizes generator excitation regulation, voltage closed‑loop control and synchronous logic processing, guarantees stable operation of generator excitation equipment.

Product Details

The UCD224A103 3BHE023681R0103 is core control interface board for ABB UNITROL 6000 excitation system and MEGADRIVE‑LCI power conversion equipment.

This board is installed inside the excitation system rack, connects to system backplane and high‑speed optical fiber link. It undertakes key tasks including power unit signal acquisition, firing angle calculation, pulse generation and synchronous signal processing. It can rapidly respond to generator voltage, current and reactive power changes, output accurate trigger pulses to thyristor power components, and realize closed‑loop adjustment of generator excitation parameters.

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

It belongs to key spare‑part for generator excitation system maintenance. Widely used in overhaul and renovation projects of thermal power, hydropower generating units.

It is important spare hardware for excitation control loop debugging and defective UCD224A103 board replacement.