eWON
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eWON 4001CD™
Installation Guide
ver 1.3
page 18 of 30
5.10 Digital output
This digital output is activated by an open drain MOSFET transistor driven by an optocoupler. The maximum
current flow into this transistor has a characteristic above the value specified in the eWON, in order to cope
with the switching power losses. The transistor used is in an open drain type with pre drive. This means the
relay power supply has to be supplied from an external source to the pre drive electronics.
The diagram below shows the external wiring needed for correct operation of the digital output. A relay has
been chosen for this sample application but any load within the specifications can be used instead.
Warning: note that this is a sink only output to ground (the transistor acts like a switch to ground).
Figure 8: Digital output: wiring diagram
Specification Value
Type of output Open drain (MOSFET)
Max current (external source) 200mA @ 30 VDC
Isolation 3,5 kV
Pinout connector See label and appendix (Input/Outputs on page 26)
Table 13: Specification of the digital output
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