Need a time delay relay

[JimS]

Need two delays from a single push button - one on for 45 seconds, one off for 1 hour. Right now I am using a microprocessor driving 24vac relays and then fan control centers to switch the 115V. But I would like to use something off the shelf for a cleaner install.

Looked at RIB and found one that looks like it will work but will require three relays - two RIBTD2401B and another to invert the input. The RIBTD2401B is nearly $100 so this would be over $200 total. There has to be something else that can do this.

It looks like all the RIBs delay the turn on, timing from the initial trigger signal and only hold the output on as long as the input is present - the opposite of what I want.

Am I back to an Aruduino or similar? For $200 I can get a really nice box to make it look good.

 

[RAL]

Altronix makes a number of different timer modules, such as the 6062, which is fairly inexpensive.  But since you are timing 2 different intervals, you will probably need a pair of them to accomplish what you want.

 

[Del91574]

RIB would be my suggestion. Usually there's something in the parts list that will do what you're looking to do, only thing is you need to find the specific unit.
 
The voltages would need to be called out, but something like an Altronix 2724 or a couple creatively wired 6062's would be also doable.

 

[LarrylLix]

Do you not have a HA system?

 

[JimS]

My goal is to make this independent of HA system for resale reasons. In either case (HA or not) the connections to line voltage need to meet code. I didn't see anything on the Altronix data sheets to indicate UL approvals or similar but I may have missed it. RIB has some low cost relays without the logic/delay, thus the microcontroller board option.
For HA the micro boards can send status and get commands from HA system but still have basic operation independent of HA system. One example - light on driveway comes on for 5 minutes when motion sensor is triggered.

 

[BraveSirRobbin]

Elk 960 Timer Relay

 

[pete_c]

I utilize the Elk 960 timer relay today.
 
I also utilize this one for some other stuff.
 

 

[Del91574]

Altronix is definitely UL listed. How it's installed can't really be governed (snap track, enclosure, DIN rail etc) nor can separation be enforced by the basics of the board itself.
 
Honeywell's relays are literally the same circuit boards/terminals as Altronix so somewhere they're made on the same lines (by who?)

Elk's boards are capable, however their terminal blocks are NOT designed for a heavy AWG if you're switching line voltage. The other item that would be worrisome is the lack of clear separation between terminals on the board itself (compare to a barrier strip on Altronix). Don't get me wrong, Elk makes good stuff, but there's a lot of grey in how it would be applied in the field.
 
What wasn't discussed was the input voltage and switching voltage, so I can't define the operating parameters.

 

[pete_c]

Yeah here never tried switching line voltage with the two mentioned boards above.    The relays on one board are rated at 10 Amps. 
 
You could just build a board with a 24V contactor on if you wanted more of a load or use one of the above boards / relays to drive a 24V contactor.

 

[JimS]

For the immediate application the load is 24VAC that switches "fan control center" relays so the line voltage switching issue doesn't apply. But I have some where it does.
Looks like a RIB (plain one with no delays) or a fan control center driven with one of the other delay boards others have mentioned would be fairly low cost ways to eliminate any possible code issues or questions..
What about low cost, small boxes to put the boards in? They are small enough I think I could just use an electrical box and bolt it to the cover plate...

 

[Del91574]

If you have mechanical space above/below, then something like an 8X8X4 would probably be a good fit. Either STI or Arlington enclosures would work for LV.
 
If you're using RIB's for HV, then you'd need to have a box or two, say like a pair of 4 11/16 nippled together then separate out the RIB cabling that way, bring the LV control into the other box and then bring the loads/field control into the appropriate box.

 

[Desert_AIP]

Velleman Kits have several timers that would fit the bill.

 

[Roadie]

You can probably find dedicated relays for cheaper than getting some digital/HA. Depending on how you want to use them and the loads you may be able to find some in the $30-$40 range. In doing a quick check,I think most are in the $70 range.
 
http://www.alliedelec.com/sensors-switches-relays/time-delay-relays-tdr-/?navigation=4294779765-4294877911