Here goes:
Protector Plus: No PC interface. 16 Zones. Can be armed in “Home mode” which will ignore signals sent by the Motion sensors (PIR) (only “listens" to the Door/Window sensors, DWS), or “Away Mode” which responds to all signals. Allows you to record a telephone message. When the alarm is triggered it will call up to 4 numbers that you have programmed and play your recording.
Monitor Plus: Same as Protector Plus but will only call the monitoring service and report to them. The monitoring service can program the unit through the telephone line. Only buy this model if you intend to pay for regular monitoring. You can not later program it to perform as the Protector model does such as recording your message and calling your own choice of tel numbers.
Pro2000: This system is basically the Protector Plus (and Monitor Plus) with the addition of a computer interface that allows you to further program options.
I suggest checking out the Honeywell system at
www.smarthomeUSA.com if you want a system that can be programmed by PC and is not too costly. It is also compatible with X-10 modules but not X-10 security remotes (from what I’ve been told).
Homelink: I suggest writing to smarthome.com and smarthomeUSA.com to get this info.
Smoke, water, glass breakage, etc. detectors that are X-10 compatible will work with these systems. See the above sites for a selection. Also, the DWS is a great device to use in conjunction with non-x-10 devices. You simply wire it to the particular sensor’s normally closed contact (NC) (in place of the included magnetic contact) and when the sensor responds to a condition it will open the contact and the DWS will send an RF signal.
As for Jeff’s garage scenario: buy a regular PIR and power it with an ordinary ac/dc adaptor of the correct voltage. Connect a DWS to its NC contact and the DWS will send an RF signal whenever movement is detected, whether the system is in armed away or armed home mode.
For animals X-10 suggests making a “pet corridor” by placing a piece of electrical tape on the bottom of the lense. Use white tape and you will not even notice it.
OK, I think I’ve covered it all (once again).
By the way x10 is having a great sale for the next 3 days. Check it out and you'll save big on the system and components and also get freebees!
-CL