if a set of batteries dies then you will never know, that station will not alert you until next arming.
Not quite - If the DS7000 does not receive the heartbeat (every hour) for I believe 4 hours, the cooresponding light will begin to flash.
Unless you buy a system that is wired, and the loss of the wired connection causes an alarm - you're in the same boat. Cut the wire, no alarm.
Unless you buy a wireless system that sounds the alarm when a sensor doesn't send a heartbeat, you're in the same boat. Certainly you wouldn't expect a wireless system to maintain a constant RF signal from all of its sensors???!!!?
Also, most of us (well maybe not Boiler
) use our systems to prevent folks from entering by making noise and flashing lights to let them know they've been detected.
If your system is intended to keep folks in - you got the wrong system - send it back.
If your system is intended to keep folks from entering, and you've designed it so that someone can get to the batteries without being detected, you've designed it poorly, and probably should hire someone.
Lastly, if you (or anyone) is using, or intending to use, X10 devices and systems in a "You bet you're life" situation - you're in the wrong place, and using the wrong stuff..... and Dr. Phil wants to have you on his show!