Chapter 5
Specifications of communication & I/Os Interfaces
5.13.Digital output
Specification
Value
Type of output
Open drain (MOSFET)
Max current (external source)
200mA @ 30 VDC
Isolation
3,5 kV
Pin-out connector
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).
Page 22 / 36
eWON 2005CD | IG 001
