How to wire a relay(s) using two separate low voltage DC sources

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txelectric

Joined Feb 7, 2024
7
I have a Digital Loggers 'IoT Relay' that is controlled by either low voltage AC or DC in order to turn on/off 120VAC loads. How can I control this relay using 5VDC and 12VDC where either, or both, voltages being applied will turn the relay on?

Thanks
 

sghioto

Joined Dec 31, 2017
5,388
But they will when connected to the relay module correct?
Can the two sources share a common negative?
Try this arrangement.
1707347709184.png
 
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