Gadspot 2211v Alarm Output Relays

[__tk__ 0]

I'm looking for help regarding how to wire the alarm output relay. I've spent a a few hours trolling Google results to no avail, and the owner manual is of no use.

 

This DVR has 4 alarm output channels, apparently each output channel has a Normal-Close and Normal-Open pin.

 

(sorry for the fuzzy image... I zoomed in to the pic from Gadspot's website and just cut out the alarm in/out area.)

 

I've used a multimeter to test NO+GND and NC+GND with the alarm disabled and enabled -- no voltage is being output by the NC/NO pins, thus an external power source is needed for my project (the 12v provided from the DVR is too much, and won't even be needed for my final solution).

 

At this point I'm simply trying to get an LED to light when the alarm is triggered. This should be a simple circuit. I use a 9v battery and resister for the LED, but I don't know how to tie the + and - leads from the battery to the DVR alarm-out relay, ground, and LED, in such a way that the LED would only light when the alarm is triggered.

 

My ultimate goal is to have the DVR alarm-out signal a micro-controller (Arduino or Raspberry Pi) and the micro-controller will do some task.

 

edit: I found a better version of the owner's manual: http://www.gadspot.com/download/gs2211vum.pdf

Still not much information regarding alarm-out setup.