Advanced Single-Phase Triac Fan Speed Controller

DOL 31 is a speed controller for fans with versatile functionality. It can operate in three different modes: automatic master mode, automatic slave mode, and manual control mode. You can use DOL 31 with a climate controller or as a standalone unit. The DOL 31 speed controller ensures smooth speed adjustment from 10% to 100%, regardless of the operation mode.

Key Features:

• Integrated alarm relay (max. 24 V, 1A) and control relay (max. 230 V, 12 A)
• Available in 6.8 A and 16 A versions
• 8 A version: Maximum motor load of 1500 VA at 230 V
• 16 A version: Maximum motor load of 3600 VA at 230 V
• The standard package includes:
  • One DOL 12 temperature sensor
  • Three plastic glands M25
  • Three plastic nuts M25

Versatile Operating Modes:

• Automatic Master Mode: Output controlled based on ambient temperature using the included DOL 12 sensor
• Automatic Slave Mode: Output is controlled by a 0-10 V input signal
• Manual Control Mode: Output adjusted manually via the front panel keyboard
• The DOL 31 features two integrated relays:
• Alarm Relay: Operates at up to 24 V, 1A
• Control Relay: Handles up to 230 V, 12 A
• The control relay offers versatile functionality, including automatically switching auxiliary equipment like heating or cooling systems on and off. This dual-relay design enhances the DOL 31’s capability to both monitor conditions and manage connected devices efficiently.