View single post by david8811
 Posted: Wednesday Nov 28th, 2018 02:27 am
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david8811

 

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I just tested my relay by connecting the DC+ and DC- of the relay to the +ve and -ve poles of my 12V 20A 240W (18 channels) DC external power supply. Set the Relay to Low Level Trigger. Then I connected the relay output 1 to a light bulb with external 240V AC power supply. When I connected (jumped) the Relay Input 1 to DC- terminal of the Relay, the Relay activated and the light on.

Now, I intended to power up my Relay using external power supply to reduce the loads to my Comfort system power supply. To do this, I connect my Relay DC+ and DC- to the +ve and -ve poles of my 12V 20A 240W (18 channels) DC external power supply. Similarly, the Relay ouput1 to a light bulb with 240V AC power supply.

To enable Comfort system to activate the Relay and switch on the light when my PIR sensor is activated, I will connect my Relay Input 1 to my my Comfort OP1 (Output1) terminal. Leave the 12V “free” unconnected as my Relay is drawing power from the external DC supply as explained above.
Q1 . Will this configuration work? If yes, Do I have to connect my Comfort system Ground (COM) to the -ve pole of my external 12V 20A 240W (18 channels) DC external power supply to create a common ground?

PS : The 12V 20A 240W (18 channels) DC external power supply is also used to power up 8 units of my NVR cameras

Last edited on Wednesday Nov 28th, 2018 02:56 am by david8811
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