Advice for wiring up a Bosch motion detector

[tondar 0]

I have one of the Dahua based Tribrid DVR's... I'm done with video motion detection and want to try out an external motion detector. I was going to order one of the Bosch OD850 units. I don't think it comes with a power supply, recommendations? What type of wire should I use for the actual alarm input to the DVR? The span of wire would be about 50' I do have an 8 channel 12v power supply that I use for my camera's, I assume I could use that for powering the sensor but would I have to fuse the wire to ensure I don't provide too much current to the sensor?

 

Thx for the help!!

[ssnapier 0]

You are correct on the power supply, and if you are not going more than about 50-75 feet you can use CAT-5 or CAT-6 to wire the sensor. We typically use 22/4, but don't worry about it unless you are putting it a long way off. Make sure you know if you need the normally open or normally closed contact for your DVR.

[tondar 0]

Thank you for the response!

 

If I use a camera power supply should I put an inline fuse in place?

 

The DVR is configurable to be either normally open or normally closed.

[ssnapier 0]

You can use a fuse if you wish, but those sensors draw such a small load it would be a very small fuse that would be effective.