Low Voltage Timer for Attic Fan

[dkemme]

I have been getting much info on this forum and will use this relay:
 
http://www.functionaldevices.com/pdf/datasheets/RIBTE01B.pdf
 
This will allow wiring to an output on my ELK M1G board.  I would also like to control with a timer on the wall to override the ELK programming if possible but not sure if this approach could damage my ELK and cannot find a wall timer.
 
Any help would be greatly appreciated.

THANKS
DJK

 

[BraveSirRobbin]

what kind of 'on' time max are you looking for from the timer?

 

[dkemme]

4-12 hours.

 

[sda]

You could use a spring wound timer, Intermatic FD12 series for example, wired in parallel with the relay.

 

[Sparkman1]

How about this one: http://www.leviton.com/OA_HTML/ProductDetail.jsp?partnumber=LTB12-1LZ&section=44956&minisite=10251
 
Cheers
Al

 

[RAL]

I have been getting much info on this forum and will use this relay:
 
http://www.functionaldevices.com/pdf/datasheets/RIBTE01B.pdf
 
This will allow wiring to an output on my ELK M1G board.  I would also like to control with a timer on the wall to override the ELK programming if possible but not sure if this approach could damage my ELK and cannot find a wall timer.

 
Just to be clear, the RIB device you linked to requires a low voltage input to activate the relay, which the Elk output can easily provide.  But you can't simply put a timer, switch or relay on that low voltage input as an override.  What you can do is use a 120V timer, switch or relay in parallel across the RIB load output as an override.  Doing that won't damage the Elk's output in any way.
 
If you really needed to have the override be a low voltage device that controlled things through the RIB input side, it could be done, but you would to do something to be isolate it from the Elk's output.

 

[Del91574]

Keep in mind, while RIB's are useful, the M1's output being used to drive them needs to be considered...such as whether or not they're driven off th J header (not recommended) directly or via a dry contact relay (such as XOVR or RB) and external power source.
 
I'd recommend keeping the power source for any RIB trigger to be separate from anything the M1 is connected to for security or mission critical devices.