ABB

Product Background

R&D Background

ABB developed the ACS6000 medium‑voltage drive platform for high‑power industrial motor control. UFC911B101 is the main control unit (MCU) designed as the brain of this modular medium‑voltage drive system. It adopts high‑performance DSP‑based processing hardware, implements ABB’s famous Direct Torque Control (DTC) technology, and is built to control large‑power IGCT power converter cells for high‑voltage motor drives.

Hardware highlights:

• 32‑bit high‑speed processor with dedicated signal‑processing capability; 64 MB Flash, 32 MB RAM for firmware and real‑time operation
• Powered by 24 VDC, typical power consumption 7 W; conformal‑coated PCB for humidity and contamination resistance
• Multiple optical‑fiber DriveBus ports for high‑speed real‑time communication with rectifier/inverter power cells
• Dual‑Ethernet, RS‑485 interfaces for engineering tool connection and plant‑level communication
• Operating temperature: ‑25 °C ~ +70 °C, IP20 protection, industrial‑grade harsh‑environment design

Current Status This hardware is End‑of‑Life (EOL), discontinued by ABB. No brand‑new original production. The market mainly supplies refurbished, repaired or used spare units for maintenance and replacement of existing ACS6000 / ACS5000 medium‑voltage drive installations.

ABB UFC911B101

Core Functions

Note: This is the drive main‑control CPU board. It does NOT directly drive high‑voltage power devices; it sends control commands to power‑cell modules via optical‑fiber DriveBus.

1. High‑performance motor real‑time control (DTC) Executes ABB Direct Torque Control (DTC) algorithm for induction motors and synchronous motors. Receives motor current/voltage feedback signals, calculates optimal switching patterns, and outputs firing commands to IGCT power cells through optical‑fiber DriveBus to realize precise speed and torque regulation.
2. System coordination and power‑cell management Coordinates all rectifier and inverter power‑cell modules inside the medium‑voltage drive. Synchronizes firing pulses for multi‑cell converter topology, monitors status of each power‑cell unit, and handles cell‑level fault detection and protection logic.
3. Fault diagnosis, protection and event logging Real‑time monitoring of drive system status; detects over‑current, over‑voltage, over‑temperature, power‑cell faults and communication failures. Stores fault records and event logs, triggers alarm or trip actions to protect high‑power motor and converter hardware.More products: www.plcva.com
4. Engineering & plant‑level communication

• Local: Dual‑Ethernet port for connection to ABB engineering tool for parameter tuning, firmware upgrade and fault‑log reading.
• Plant‑level: Supports Modbus‑TCP, Profibus‑DP and other fieldbus protocols for data exchange with plant DCS/SCADA systems.
• RS‑485 serial port for auxiliary communication interfaces.

5. Configuration & firmware storage On‑board Flash memory stores drive firmware, motor‑parameter settings, and control‑configuration data. Supports firmware download and parameter modification via engineering software.

Hardware Interfaces

• Optical‑fiber DriveBus ports: High‑speed real‑time communication with rectifier/inverter power‑cell modules
• Dual‑Ethernet ports: Engineering access and plant‑network connection
• RS‑485 serial port: Auxiliary field‑bus communication
• 24 VDC power‑supply terminals
• Digital I/O terminals for drive‑system interlock and alarm signals
• Front‑panel status LEDs: Power, run, fault and communication indication

Main Applications & Deployment Sites

Core Application: Main‑control CPU board for ABB ACS6000 / ACS5000 medium‑voltage high‑power variable‑frequency drives, for large‑capacity high‑voltage motor speed‑regulation control.

1. Power‑generation industry Large‑capacity auxiliary motors in thermal/hydro power plants: boiler‑feed‑water pumps, forced‑draft fans, induced‑draft fans, condensate pumps, high‑power cooling‑water pumps.
2. Mining industry High‑voltage large‑power motors for mine hoists, conveyors, crusher drives, slurry pumps.
3. Oil & Gas, Petrochemical & Refineries Large compressors, pipeline pumps, refinery heavy‑duty process motors, high‑power pump and fan drives.
4. Cement, Pulp & Paper, Heavy‑Metallurgy Large‑capacity kiln drives, mill motors, blower and pump drives for continuous heavy‑load industrial production.
5. Water‑treatment & Water‑supply plants Large‑scale water‑pumping station high‑voltage pump motor speed‑regulation systems.

Key distinction summary for reference:

• UFC911B101: Medium‑voltage drive main‑control board, for high‑power motor VFD control.
• 216VC62a: Generator relay‑protection CPU board, fault‑protection logic.
• UNITROL 1020: Generator excitation AVR, voltage and excitation regulation.
• CMA121: System‑rack power‑supply card, supplies 24 VDC for DCS subrack.
• DSAI130A: DCS analog‑input I/O board, field‑signal acquisition.

Understand the lowest price, please contact via email: plcvarious@foxmail.com

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