diode isolating 2 remote outputs?
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103532
Printed Date: July 12, 2025 at 10:58 AM
Topic: diode isolating 2 remote outputs?
Posted By: raccen
Subject: diode isolating 2 remote outputs?
Date Posted: March 30, 2008 at 8:58 PM
If I want a single relay controlled by two different outputs of my alarm (outputs are (-)200ma) would I need to diode isolate?
It doesn't seem like I would because while one channel is triggered the other would just be an open relay inside the alarm?
or so I think...
(don't want to fry alarm)
DEI Viper 800 esp
Thanks!
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-Merrick
Replies:
Posted By: KPierson
Date Posted: March 30, 2008 at 10:02 PM
You shouldn't need to isolate them at all. Even if they are both on at the same time, they are both ground, so nothing would happen if you connected them together.
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Kevin Pierson
Posted By: raccen
Date Posted: March 31, 2008 at 1:55 AM
Yep, that makes perfect sense!
Thanks!
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-Merrick
Posted By: dualsport
Date Posted: April 01, 2008 at 11:07 PM
In general, if the two outputs don't output any voltage when they're off it should be okay.
The only other reason you might want to isolate them is if you're using the outputs to drive two different things other than the common relay.
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