VM1000 Series
‐42‐
Figure 2-20 Source Wiring
To source wiring, OP must be changed to connect to COM(for example by lug plate), and
connect +24v to public terminal of external controller.If using external power, it also
needs to connect the negative pole of external power to OP.
C：Digital Output Terminal
When the digital output terminal needs to drive the relay, an absorption diode shall
be installed between two sides of the relay coil. Otherwise, it may cause damage to
the 24 VDC power supply.
Do not reverse the polarity of the absorption diode during installation, as shown in
Figure2-21. Otherwise, the 24 VDC power supply will be damaged immediately
once there is digital output.
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