Grounding when using Auxiliary Power Source and External Relays

nemesis

Member
Quick wiring question regarding an OmniPro II when using an Auxiliary Power Supply and External Relays.  I am adding an Altronix Power Supply to my set-up to power a large number of sensors.  Power comes from the Altronix Unit for these Sensors.  Do I still utilize the ground terminals found on the main panel for the grounds for all sensors or do I tie the negative ends in somewhere else?  I am wondering because if the board is not set-up to handle the power requirements of these items, is it set-up to handle the back end of the circuit (negative)?
 
I apologize for the dumb question.  I was jumping the gun and asked the question before the Altronix Unit arrived.  It just showed up and it has the Negatives (grounds) built right in.  Thank you anyway.
 
You'd land the postitve and common on the Altronix, but it's always a prudent idea to run a common from the supply to the host panel.
 
Thank you for the suggestions.  I tied the grounds together and that portion seems to be working wonderfully.
 
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