ABB UFC760BE145 3BHE004573R0145 I/O Expansion Board

UFC760BE145 with part number 3BHE004573R0145 is a multifunctional plug-in control board manufactured by ABB, compatible with ACS800 medium voltage frequency converters and UNITROL series generator excitation cabinets. It integrates analog/digital signal acquisition, local closed-loop control logic and fieldbus expansion interfaces, collecting field feedback signals and executing PID regulation, interlock protection and sequence control tasks independently. It converts raw measurement signals into standardized digital data for communication with upper main control boards such as HAC782AE and drive master controllers.

This industrial PCB is equipped with conformal coating and reinforced EMC filtering circuits to resist dust, humidity and strong electromagnetic interference inside power station and metallurgical equipment cabinets. It reserves two expansion slots for optional fieldbus adapters to support multiple industrial communication protocols. Original mass production has been discontinued, and it serves as a critical aftermarket spare part for maintenance, replacement and retrofit of aging ACS800 drives and UNITROL excitation control racks.

Main Specifications

• Brand: ABB; Model: UFC760BE145; Part No.: 3BHE004573R0145;In stock
• Applicable Equipment: ACS800 Series Medium Voltage Drives, UNITROL Generator Excitation Control System
• I/O Configuration: 2 configurable analog input (4–20mA / 0–10V), 2 configurable analog output, multi-channel digital DI/DO terminals
• Communication Expansion: Dual slots for Profibus DP, Modbus TCP and CANopen fieldbus adapters
• Control Precision: ±0.1% full scale for analog signal sampling, 250μs fast control cycle
• Isolation Design: Reinforced galvanic isolation between field wiring and internal control circuits
• Power Supply: 24VDC ±15% auxiliary power from cabinet backplane, max 24W power consumption
• Diagnosis Function: Built-in real-time self-test circuit with front panel LED fault indicators
• Operating Environment: -20℃ ~ +60℃, relative humidity 5%~95% non-condensing, CE & UL certified
• Installation: Standard internal rack plug-in structure inside drive or excitation cabinet, power-off required for replacement
• Matching Hardware: HAC782AE main control board, GDC780BE gate drive board, PPD113 voltage sampling board

Core Functions

• Continuously collect analog signals including generator temperature, motor speed feedback and pipeline pressure, as well as digital contact signals from circuit breakers and cooling fans.
• Run independent local control algorithms including PID closed-loop regulation, equipment interlock protection and sequential startup/shutdown logic without relying on upper controllers.
• Support multi-protocol fieldbus communication to exchange real-time operation data and fault codes with DCS systems, HMI panels and engineering workstations.
• Multi-stage surge suppression and current limiting protection automatically cut off abnormal signal channels during short-circuit or overload faults to prevent board burnout.
• Conformal coated PCB layout improves corrosion resistance, adapting to humid, dusty and vibration-intensive operation environments of power plants and metallurgical workshops.
• Unified rack bus and signal pin definition support direct ｄｒｏｐ-in replacement, no modification of cabinet wiring or control parameters during on-site maintenance.

Application Scenarios

• Spare control expansion board replacement for ACS800 medium voltage converter cabinets in thermal power plants and hydropower stations.
• Signal acquisition and local control spare parts for UNITROL series synchronous generator excitation control racks.
• Maintenance backup inventory for petrochemical refineries, metallurgical rolling mills and pulp & paper mill auxiliary drive systems.
• Matching I/O processing module cooperating with ABB HAC782AE main control board and GDC780BE IGBT gate drive board.
• Overhaul and retrofit spare components for aging ACS800 drives and excitation systems with signal loss and communication failure faults.

• Global aftermarket spare stock for energy, chemical and heavy industry maintenance workshops maintaining legacy ABB power conversion and excitation hardware.