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smartDEN Opener User Manual
24 Apr 2018
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6.4. Connecting digital inputs
6.4.1.
Using the built-in power supply output
Figure 6.7. Connecting digital inputs using smartDEN Opener power out
Dry contact inputs such as PLC contacts or pushbuttons can be connected to the digital inputs
using the 12VDC (24VDC) power output of the smartDEN Opener . In this case, GND and DIN-
are shorted and contacts are connected between VDD and the appropriate digital input (DIN+).
6.4.2.
Using external power supply output
Figure 6.8. Connecting digital inputs using external power out
In this way it is shown how to make connection of the same contact inputs using an external
power supply. Note that in this case, no connection is made to the VDD or GND.