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DOL 31 Speed Controller
Technical User Guide 5
1 Product description
DOL 31 is a single-phase triac speed controller for e.g. regulation of fans, stand-alone heating units or light.
DOL 31 can with advantage be used in applications where a complete climate controller is not required.
DOL 31 can be set to three different modes of operation:
• Automatic - Master mode in which the DOL 31 output is controlled on the basis of the ambient temperature.
Each DOL 31 is supplied with one DOL 12 temperature sensor.
• Automatic - Slave mode in which the DOL 31 output is controlled by a 0-10 V input signal.
• Manual control in which the DOL 31 output is set manually by means of the keyboard on the front.
In addition, DOL 31 has an alarm relay (max. 24 V, 1A), and 1 control relay (max. 230 V, 12 A). The control re-
lay could for instance be used for turning a heat or cooling source on and off.
DOL 31 speed controller is available in a 6.8 A and a 16 A version.
1.1 DOL 31 Automatic – Master mode
Temperature-controlled by means of a DOL 12 temperature sensor.
Fan Fan
DOL 12
Heating
Heating
DOL 12
Fan/Heating
DOL 12
Regulation of fans Regulation of heating Control of one or more DOL 31, ex-
tended capacity.
Fan
DOL 12
Regulation of fan
0-10 V or 10-0 V