jumpjack 0 Posted July 18, 2010 My DVR-8204 supports up to 4 alarm sensor, but how to connect them? Manual: http://cn-dvr.com/manual/8204english.pdf I tried just connecting a switch mamong pin 1 and GND and closing the switch, but nothing happens both if pin is set to high or low in configuration. Share this post Link to post Share on other sites
