Flyback / snubber diodes
Flyback / snubber diodes
I'm using 24vdc solenoids for my glycol valves. I'm thinking I need flyback diodes to protect the relays. Any experienced opinions out there? Thanks
Re: Flyback / snubber diodes
I thought I would get some response to this. Anyone running 24v dc solenoids who've had relays fail and not know why? I've ordered my diodes and will be adding them either way. Too cheap and easy not to do it and I do believe it will help relay life in my case. Not sure if it's significant at 12v. Cheers.
-
- Site Admin
- Posts: 1726
- Joined: Sun Jul 18, 2010 7:51 am
- Bot?: No
- Location: Huntington Beach, CA
- Contact:
Re: Flyback / snubber diodes
Most relay boards come with flyback diodes these days. Are you using individual relays that don't already have the protection?
Re: Flyback / snubber diodes
I'm using a board from electronic salon like I saw used by many others on this forum. There are no diodes across the output contacts shown in the schematic linked to below for these boards.
https://images-na.ssl-images-amazon.com ... HTDz-L.pdf
https://images-na.ssl-images-amazon.com ... HTDz-L.pdf
-
- Site Admin
- Posts: 1726
- Joined: Sun Jul 18, 2010 7:51 am
- Bot?: No
- Location: Huntington Beach, CA
- Contact:
Re: Flyback / snubber diodes
A flyback diode is across the coil contacts, not the output contacts. The board you've shown does have a flyback diode on the coil.
Re: Flyback / snubber diodes
You need it on both sides for the same reason.
Re: Flyback / snubber diodes
You need it on both sides for the same reason.
Re: Flyback / snubber diodes
Oops on the double posting.... newbie mistake...