Can anyone suggest a good loudspeaker that could be triggered from the alarm output on a Dennard external dome? something compact and decent looking would be preferred as its for a domestic install. There is preinstalled co-ax to the tower positions which means all equipment for the speaker and message must be located at the camera tower position. It only needs to be able to give a short voice warning message.

Edited October 6, 200520 yr by barrett90

http://www.optex-europe.com/External/vx-402_vx-402rec.htm

Something like that maybe?

Try this site:

http://www.taipantechnology.co.uk/index.php

Only used the one without the PIR but it works o.k

Do Dennard domes have alarm outputs? i thought they were inputs actually?

I don't think the domes have inputs or outputs, but the drx receiver has both.

Well i just checked the PDF's on 2060 domes and DRX receivers and there are no outputs, only inputs. Thinking about it why or from what would you need or trigger an output from a dome?

I checked the drx pdf and it showed 1 alarm output.

I think the theory is you wire the detectors to the inputs to drive the ptz, then the output activates to trigger recording or transmission, with the ptz at the appropriate preset.

Cant with you or the reasons why, i cant find anything like that and cant say ive ever seen an output from a dome or the receiver.

But there you go, the other reason would be to trigger a message generator.......

Would a little unit with a PTZ address to activate/deactivate a relay be worth designing ? Also N R Bardwell in Sheffield sell small cheap modules with a built in alert voice but they require + and - 9 volts.