ABB ACH 531

A robust HVAC drive engineered for reliable climate control and easy integration into building management systems.

Product Overview

The ABB ACH531 VFD is a reliable and energy-efficient HVAC drive designed for applications such as fans, pumps, compressors, and air-handling units. Built specifically for HVAC systems, it offers easy installation, fast commissioning, and robust performance. With integrated safety features, built-in EMC filter, and HVAC-specific control functions, the ACH531 ensures optimized energy usage and long-term reliability.

Key Features

  • Designed specifically for HVAC applications
  • Built-in EMC filter and double DC reactors (reduced harmonics)
  • Integrated Safe Torque Off (STO – SIL 3, PL e)
  • HVAC-specific macros and advanced PID control
  • User-friendly HVAC control panel with pre-defined menus
  • Coated circuit boards for harsh environments
  • Operates up to 50°C ambient temperature
  • Built-in Modbus RTU and BACnet communication
  • High efficiency (~98%) for energy savings
  • Fully compatible interface with ABB all-compatible drives

Technical Specifications

ParameterDetails
Voltage / Power3-phase: 380–480 V
0.75 to 75 kW
ApplicationsFans and ventilation systems
Pumps and booster systems
Compressors
Chillers
Air Handling Units (AHU)
Cooling towers
Protection ClassesIP21
Safe Torque Off (STO – SIL 3, PL e)
Motor ControlScalar control
Vector control
Supports induction and permanent magnet motors
Output frequency: 0 to 500 Hz
I/O ConfigurationDigital Inputs: 6 DI
Analog Inputs: 2 AI
Analog Outputs: 2 AO
Relay Outputs: 3 RO
Built-in STO
Auxiliary 24V supply available
FieldbusBuilt-in: Modbus RTU, BACnet
Optional: PROFINET, EtherNet/IP ,PROFIBUS ,CANopen ,Modbus TCP
Cable LengthTypically up to 100–300 meters (depends on frame size and installation conditions)
Overload (HD)110% overload capacity for 1 minute every 10 minutes (Light-duty HVAC profile)

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