Document Part # 026-4283 Rev 0 Page 3 of 8
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3 Absolute Maximum Power
XEV20D is able to drive a wide range of stepper valves, in the following table are indicated the maximum values of
current that the actuator can supply to the stepper wiring. Select the current transformer depending on application
seeing the following table, for each kind of driving and functioning is reported the Dixell transformer to use.
NOTE: The electrical power absorption of the valve can be unrelated to refrigeration power that valve has. Before
using the actuator, please read the technical manual of the valve supplied by the manufacturer and check the
maximum current used to drive the valve in order to verify that they are lower than those indicated below.
4 Wiring Diagram
4.1 One Valve Configuration
CONFIGURATION
ONE VALVE TWO VALVES
Driving Mode
Full Step Full Step
Valve Type
Bipolar Valves
(4 wires)
Current 0.9A max
> TF20D
Current 0.9A max for each valve
> TF40D
Unipolar Valves
(5-6 wires)
Current 0.33A max
> TF20D
Current 0.33A max for each valve
> TF20D
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