Awesome, thank you.  I ordered one of the RG-11 Rain Sensors which has a 24v 1A 
relay on it and am going to try that out as well.  We have a door sensor 
attached to the site monitor now, could I use that to trigger the site monitor 
relay?  To turn on some 24vdc LED lights inside the enclosure when the door 
opens?

From: Af [mailto:af-boun...@afmug.com] On Behalf Of Forrest Christian (List 
Account)
Sent: Wednesday, April 20, 2016 21:22
To: af <af@afmug.com>
Subject: Re: [AFMUG] Enclosure ventilation

The relay on the base unit is more than large enough to turn on and off that 
fan - at 24V it can switch 2A.  You just run power from your power source into 
the 'c' terminal, and then from the 'n.o' terminal to the fan.  Hook the black 
back to the power source.

If you just want temperature control, there are two values you can set which 
say 'relay on above' and 'relay on below' which will allow you set the relay to 
turn on/off with temperature control.  I'd just set 'relay on above' to 
something like '200', which means turn the fan on over 20*C (about room 
temperature).  If this doesn't work, let me know and I'll get you the correct 
firmware for that (there was a bug which we fixed, but I'm not sure where it is 
in the whole release/shipping/on website process).

-forrest



On Wed, Apr 20, 2016 at 9:28 PM, Scott Vander Dussen 
<sc...@velociter.net<mailto:sc...@velociter.net>> wrote:
Fiberglass enclosure
Bud Industries 
IPV-1116<http://www.alliedelec.com/bud-industries-ipv-1116/70368864/> vents
Orion 
WMG60M<http://www.alliedelec.com/orion-knight-electronics-inc-wmg60m/70103693/> 
wire filters
60mm DC 
fan<http://www.rpelectronics.com/cfa246025ms-24vdc-sleeve-bearing-60mm-fan.html>
 with Locked Rotor Alarm Signal Output
60mm guard<http://www.rpelectronics.com/cfg-60m-60mm-metal-finger-guard.html>

The enclosure includes a Site Monitor, I'm hoping to use its secondary DC input 
to monitor the fan's yellow alarm wire lead and trigger an error state in our 
SNMP monitoring if a fan becomes locked.

I'm concerned about the fans running 24x7 potentially bringing in moisture from 
fog/nightly humidity.  With the site monitor could to turn the fans on/off 
based upon ambient temperature or time of day?  If yes, how would I do that, a 
relay?  What kind of relay?  I don't have much experience with relays/Site 
Monitors, thanks.  Or is there some other obvious solution I'm missing?

Another idea is to use a Hyderon RG-11 Rain Sensor / 
Gauge<http://rainsensors.com/how-it-works/> to trigger the fans off for both 
dark (less than 2000 lux) and/or rain.  This seems pretty rad!

Thanks,
`S



--
Forrest Christian CEO, PacketFlux Technologies, Inc.
Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
forre...@imach.com<mailto:forre...@imach.com> | 
http://www.packetflux.com<http://www.packetflux.com/>
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