Voltage electronic control unit Dcontrol, Ucontrol, Acontrol

Overview
Electronic voltage regulators (phase-angle control devices) and transformer-based control units for simple, economical speed control of external-rotor motors and fans. Devices are available for nominal currents up to 80 A and include integrated 5-position switches as standard.

Main versions

• Acontrol (1~): single-phase controllers with easy speed setting via integrated rotary knob or 0–10 V signal; output range 2.5–20 A (depending on model).
• Dcontrol (3~): three-phase controllers using phase-angle control for individual or parallel operation; available in ranges from 2 to 80 A.
• Ucontrol (3~): universal three-phase device with preset operating modes and additional integrated inputs/outputs; output ranges up to 80 A.

Acontrol — Product specification
Speed adjustment based on the phase‑angle control principle. Suitable for single operation or parallel operation of 1~ motors or fans.

Acontrol — Features & specificities

• Optimized for combination with ZIEHL-ABEGG external-rotor motors and fans.
• Easy local speed setting via integrated rotary knob or remote control via 0–10 V signal.
• Versions with integrated control functions: simple pressure/temperature controllers up to universal control devices; additional inputs and outputs integrated.
• Industry-specific variants available (e.g. agricultural ventilation computer for 1~ Acontrol).

Dcontrol + Ucontrol — Product specification
Speed adjustment according to the phase‑angle control principle for 3~ motors and fans. Individual or parallel control of motors/fans.

Dcontrol + Ucontrol — Features & specificities

• Dcontrol: speed controller with simple speed command via 0–10 V signal; versions with integrated regulation functions for pressure and temperature control.
• Ucontrol: universal device with easy-to-select preset operating modes and additional integrated inputs/outputs.
• Ideal combination with ZIEHL-ABEGG external-rotor motors and fans.

Selection & variants

• Available current ranges: from 2.5 A up to 80 A depending on model (examples: 2.5 A, 5 A, 6 A, 10 A, 12 A, 14 A, 15 A, 16 A, 20 A, 25 A, 35 A, 50 A, 80 A).
• Single-phase (1~) and three-phase (3~) lines depending on version.
• Common nominal voltages: 230 V, 400 V, 500 V (model dependent).

Typical applications

• Speed control of fans and external-rotor motors in ventilation and HVAC systems.
• Cost-effective solutions for simple motor control tasks and installations where low investment cost is a priority.
• Specialised configurations for agricultural ventilation and other industry-specific requirements.

Technical characteristics / specifications

• Control principle: phase-angle control or transformer-based control depending on version.
• Nominal currents: up to 80 A depending on model.
• Line types: single-phase (1~) for Acontrol; three-phase (3~) for Dcontrol and Ucontrol.
• Nominal voltages: 230 V, 400 V, 500 V (depending on variant).
• Speed setting: integrated rotary knob (Acontrol) or 0–10 V signal for speed command.
• Inputs/outputs: versions with additional integrated I/Os for regulation tasks (pressure, temperature, etc.).
• Operating modes: Ucontrol offers preset modes that are easy to select.
• Local controls: integrated 5-position switches as standard.
• Compatibility: optimized for ZIEHL-ABEGG external-rotor motors and fans.