Wiring a 24V DC Relay to Control AHU Contactor Coil via Building Management System

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#1 21670227 24 Oct 2013 13:26

Jo McG Jo McG

Anonymous

Post #1
21670227 24 Oct 2013 13:26

I want to use a 24 V DC relay to automatically start/stop a air handling unit that will be remotely controlled using a building management system. My problem is how do i wire the relay to the contactor that controls the coil on the AHU?
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#2 21670228 30 Oct 2013 11:02

William Fannin William Fannin

Anonymous

Post #2
21670228 30 Oct 2013 11:02

Hi Jo,
There will be two tabs on either side of the contactor that use 24 volts. It's simply a matter of connecting your two leads from your voltage source. Notice the terminals separated from the body of the contactor. One lead on one side the other on the opposite side. TADA!!!
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