Print Page | Close Window

multiple relay connection

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=134918
Printed Date: May 13, 2025 at 12:36 PM


Topic: multiple relay connection

Posted By: mike31
Subject: multiple relay connection
Date Posted: September 22, 2013 at 11:10 PM

HI
Please read this paragraph from Prostart manual:
If multiple relays or modules are connected to the Ground
Out wire, ensure that they are all diode isolated in order to avoid
feedback and damaging the vehicle. Can somebody please attach a circuit diagram AS COULD BE VERY USEFUL .Thanks in advance. MIKE



Replies:

Posted By: oldspark
Date Posted: September 30, 2013 at 11:35 PM
Wire all load/relay-coil GNDs thru a diode (IN4004 etc) with the diode's line end towards GND.

If doing the same on the +12V side, it's the same but the diodes are usually placed on the +12V side - ie, +12V thru diode with line end towards load/relay-coil.


Print Page | Close Window