programmable relay for redundancy purpose

Request new hardware or ideas for the controller

Posts: 41
Joined: Wed Apr 27, 2011 9:08 am
PostPosted: Fri Oct 27, 2017 10:21 am
Anyone know of a type of relay that will power on once power is applied to it and then stay on for a programmable time say 1 minute or less and then turn off. Once the power goes off to this redundant relay the timer resets and awaits for power to be applied to the redundant relay. I would like to have a redundant timer for ATO and dosing purposes in case there are any lockups to the main RA timer. I haven't found anything readily available like this online. Roberto is this something that can be made if none are available on the market?

Thanks
Tim

Posts: 11878
Joined: Fri Mar 18, 2011 6:47 pm
PostPosted: Fri Oct 27, 2017 10:31 am
There are many of these available in the market.
Search for time delay relay. I just bought one on eBay last month for a machine.
Roberto.

Posts: 41
Joined: Wed Apr 27, 2011 9:08 am
PostPosted: Fri Oct 27, 2017 1:02 pm
Thanks for the info Roberto. Found the following timer delay relay, but no manual . From the wiring diagram it looks like pin 7/2 are source power, 5/2 for the power delay output, and short 1/3 to reset timer?
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Posts: 11878
Joined: Fri Mar 18, 2011 6:47 pm
PostPosted: Fri Oct 27, 2017 1:57 pm
I bought this one:
https://www.ebay.com/itm/MACROMATIC-TR- ... SwB-1Yts3e
Roberto.

Posts: 41
Joined: Wed Apr 27, 2011 9:08 am
PostPosted: Sat Oct 28, 2017 9:52 pm
Thanks Roberto.

Posts: 41
Joined: Wed Apr 27, 2011 9:08 am
PostPosted: Tue Oct 31, 2017 11:29 am
Ended up choosing the interval on relay version from Macromatic. They have about a dozen type of these delay relays. Nifty.

Tim

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