XEV20D Absolute Maximum Power Overview • 13
4.7. XEV20D Absolute Maximum Power
The XEV20D can drive a wide range of stepper valves. Indicated in the following table are the maximum values of current that the
actuator can supply to the stepper wiring.
Note: TF20D=20VA transformer, 40D=40VA
4.7.1. Description of XEV20D Connections
NOTE: The electrical power absorption of the valve can be unrelated to refrigeration power that valve has. Before using
the actuator, read the technical manual of the valve supplied by the manufacturer and check the maximum current used
to drive the valve to verify that they are lower than those indicated below.
CONFIGURATION
ONE VALVE TWO VALVES
DRIVING MODE Full step Full Step
VALVE
TYPE
BIPOLAR VALVES (4
wires)
Current 0.9A max
Æ TF20D
Current 0.9A max for
each valve
Æ TF20D
UNIPOLAR VALVES
(5-6 wires)
Current 0.33A max
Æ TF20D
Current 0.33A max for
each valve
Æ TF20D
Table 4-8 - Maximum Values of Current
Connector Description
Connector for 24VAC/DC power supply analog inputs (Pb1 – Pb4, PbC) Additional
power (+5VDC, +12VDC, GND) LAN
CAN Bus connector for connection to monitoring system. Rx and Tx LED to indicate
that communication is active Closed circuit terminal (Term)
CAN Bus serial line Address
Connections to valve 1 (W1/W2) Additional power (+12VDC)
Connections to valve 2 (W1/W2) Additional power (+12VDC)
Table 4-9 - XEV20D Connection Descriptions
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