3BHB006621R0103 UAC375AE103 power control board

3BHB006621R0103 UAC375AE103 Power/Excitation Control Board
Product Overview
3BHB006621R0103 UAC375AE103 is a multifunctional power control/excitation controller produced by ABB in Sweden. It belongs to the core control module of ABB ACS880 series and DCS distributed control system. This module can be used as both a generator excitation controller (using a high initial response self parallel static excitation system) and a servo/motor motion controller and PLC control module, widely used in key industrial scenarios such as power, metallurgy, and petrochemicals.

📌 Model interpretation: 3BHB/006621/R0103 → UAC375/AE103

3BHB=ABB Control Board Series Identification
UAC=Universal Automatic Controller
375=Controller series code
AE103=Version/Revision Level
📌 Core positioning: High initial response self parallel excitation static excitation system controller/servo motor controller/DCS PLC module

Model Interpretation
Meaning of field codes
3BHB – ABB Control Board/Module Series Identification
006621- Product serial number
R0103- Version/Revision Level
UAC – Universal Automatic Controller
375- Controller Series (375 Series)
AE – Version Type (AE=Standard Version)
103- Sub model/Function Configuration
Order number 3BHB006621R0103 ABB official order number
Core technical parameters
Parameter specifications
brand ABB
System ACS880 series/DCS distributed control system/excitation control system
Module type: power control board/excitation controller/servo controller/PLC module
Working environment temperature: 0 ° C~50 ° C
Power supply 24VDC (typical)
Maximum continuous voltage 48VDC
Maximum continuous current of 12A
Peak voltage 60VDC
Peak current of 24A
PWM chopper control frequency 16kHz~80kHz (optional)
communication interface ✅ RS232 / ✅ CAN bus
Supported Protocols ✅ MOTEC protocol/ ✅ Modbus protocol/ ✅ CANopen protocol
Control mode Network mode/Pulse mode/Analog mode
Motion Control ✅ Position control/ ✅ Speed control/ ✅ torque control
Motion curve ✅ S-curve/ ✅ T-curve/ ✅ PVT mode/ ✅ PT mode
Two non isolated digital inputs (DI) for digital input
Digital output: 2-channel non isolated digital output (DO)
protection function ✅ Overcurrent/ ✅ Overvoltage/ ✅ Undervoltage/ ✅ I²t / ✅ Temperature/ ✅ Position deviation exceeded/ ✅ Speed exceeds the tolerance/ ✅ Encoder failure
Feedback support ✅ Incremental encoder/ ✅ Digital Hall/ ✅ SSI magnetic encoder at the reducer end/ ✅ Onboard magnetic encoder
Adapted motor ✅ DC brushless motor/ ✅ DC brushed motor
Front panel LED ✅ OK / TX/RX / BYPASS
Protection level IP20 (installed inside the cabinet)
Installation method: DIN rail/chassis slot
Production Status ⚠️ Stopped production, the market is dominated by inventory/disassembled parts
System architecture and functionality
┌──────────────────────────────────────────────────────────────────┐
│ UAC375AE103 Multi functional Controller │
│ │
│ ┌─────────────────────────────────────────────────────────┐ │
││ Three major application modes ││
│ │ │ │
│ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │
│ │ │ 🔌 Excitation control ││ ⚡ Servo control ││ 📊 DCS/PLC │ │ │
│ │ │ │ │ │ │ │ │ │
│││ Self shunt static ││ DC brushless/brushed ││ Network/pulse/│││
│││ Excitation system ││ Motor control ││ Analog mode │││
│ │ │ │ │ │ │ │ │ │
│││ High initial response ││ PWM 16~80kHz ││ RS232/CAN │││
│││ 48V/12A ││ Position/Speed ││ MOTEC/Modbus │││
│││││ Torque control ││/CANopen │││
│ │ └──────┬──────┘ └──────┬──────┘ └──────┬──────┘ │ │
│ └─────────┼────────────────┼────────────────┼──────────────┘ │
│ │ │ │ │
│ ┌─────────▼────────────────▼────────────────▼──────────────┐ │
││ Protection and Diagnosis ││
││ Overcurrent | Overvoltage | Undervoltage | I ² t | Temperature | Position Out of Tolerance | Speed Out of Tolerance ││
││ Encoder failure | 2-channel DI | 2-channel DO | S/T/PVT/PT curve ││
│ └─────────────────────────────────────────────────────────┘ │
└──────────────────────────────────────────────────────────────────┘
Three core application scenarios
Application scenario mode description: Typical applications
🔌 Generator excitation control excitation mode high initial response self parallel static excitation system, 48V/12A power supply for turbine generator and hydro generator excitation
⚡ Servo motor control, servo mode PWM chopper control (16~80kHz), position/speed/torque control, DC brushless/brushed motor drive
📊 DCS/PLC control PLC mode network/pulse/analog mode, RS232/CAN communication distributed control system, process control
Detailed explanation of excitation control application (core highlights)
According to practical engineering applications, UAC375AE103, as a high initial response self parallel excitation static excitation system controller, has been successfully applied in multiple cogeneration units:

Project Description
Excitation type: Self shunt Static Excitation
Core advantage: high initial response, improving efficiency by about 16.9%
Application Case: Datang Group’s 320MW Subcritical Heating Unit in the Beijing Tianjin Hebei Region
Transformation method: residual pressure utilization, back pressure machine+low-pressure cylinder inlet steam full cutting
Operation mode: Dual back pressure operation mode for both small and large machines
The designed water supply pressure for the heating network parameters is 2.5MPa, but the actual pressure is 1MPa
Heating extraction pressure 0.4MPa (slightly positive pressure is sufficient)
Communication Protocol and Interface
Purpose of Communication Interface Protocol
RS232 MOTEC/Modbus/CANopen point-to-point communication, connected to upper computer/HMI
CAN bus CANopen multi node communication, connecting servo drivers/sensors
Digital input (DI) 2-channel non isolated dry/wet contact signal acquisition
Digital output (DO) 2-channel non isolated relay/transistor output driver
PWM output 16kHz~80kHz servo motor drive
Encoder interface incremental/Hall/SSI/onboard magnetic encoder position/speed feedback
Constant pairing module (ACS880/DCS ecosystem)
Module Model, Order Number, Type, Function Description
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3BHE006412R0101 3BHE006412R0101 UFC762AE101 CVMI board communication extension
3BHE014070R0101 3BHE014070R0101 PPC907BE101 power board ⭐ necessary
3BHE024577R0101 3BHE024577R0101 PPC907BE101 power board ⭐ necessary
3BHE013431R0001 3BHE013431R0001 KUD181A01 power module ⭐ necessary
3BHE003604R0102 3BHE003604R0102 UFC765AE102 communication board is optional
3BHE01457R6104 3BHE01457R6104 UNITOL 1000 excitation controller high-end replacement
3BSE018877R1 3BSE018877R1 PFSK152 channel control unit signal acquisition
3BSE018876R1 3BSE018876R1 PFSK151 channel control unit signal acquisition
core advantage
Advantages Explanation
🔌 Three in one multifunctional excitation control+servo control+DCS/PLC, one module meets various needs
⚡ High initial response excitation self parallel static excitation system, fast response speed, improves power generation efficiency by about 16.9%
🎛️ PWM high-frequency control 16kHz~80kHz optional, high control accuracy, smooth motor operation
📡 Multi protocol communication RS232+CAN bus, supporting MOTEC/Modbus/CANopen protocols
🛡️ Comprehensive protection against overcurrent/overvoltage/undervoltage/I ² t/temperature/position deviation/speed deviation/encoder failure
📐 Multi curve motion S-curve/T-curve/PVT mode/PT mode, flexible motion control
🌡️ Wide temperature range of 0 ° C to 50 ° C, suitable for harsh industrial environments
🔧 hot-swapping ✅ Support online replacement (RIOP), the system does not shut down
📊 Dual DI/DO 2-channel non isolated digital input+2-channel non isolated digital output
🔄 Multiple feedback incremental encoders/digital Hall/SSI magnetic encoders/onboard magnetic encoders