Depending on how they are wired into the system, they may or may not utilize any currently provided battery backup. If more power is required additional power supplies must be purchased. Do not exceed 90% of the system's current capability. Care should be taken so this number is not exceeded. This number was then compared to the power that can be provided via this main board (referred to instruction/installation manual). The current draw of each sensor was totalled. There are two terminal screws on the NX8-E main board which provide this power. Sensors that require power are 12 volt DC with a battery backup. When a switch opens, it will send an alarm condition to the zone/panel that it is wired to.

In other words, when motion, glass break, or magnetic contact break occured, the sensors outputs went from acting like a closed switch to an open switch. All of the sensors used here used 'contact closure' outputs. The wiring to the magnetic type door and window sensors required two conductors (contact closure). The keypads also required four conductors (power and data lines). The motion sensors, and glass break sensors required four wires, two for the contact closures and two for the 12 volt power to the sensors. Two conductor (one-pair) and four conductor (two-pair) 22 gauge solid core wiring was mainly used for the remote sensors and keypads. Most of the wiring was run before installation of the drywall. In addition two more keypads (cheaper LED's), two glass break sensors, and two additional motion sensors were also purchased. The kit also included a mounting box, battery, siren, motion sensor, and LCD Keypad. The system chosen for this (my home) installation is a Caddx NX8-E with a 16-Zone Board Expander, and a Relay Expander Board. It also provides a general installation methodology and troubleshooting/general check-out procedure descriptions.įor users installing a Caddx system and who plan on using the Homeseer plugin with it, you may want to refer to Nitrox's new Installation Instructions!

This 'part-one' series is dedicated to the installation of wired magnetic sensors for doors and windows. Other sensors may include fire alarms as well as CO sensors. One common element all security systems will have is the installation of sensors for doors and windows, as well as other sensors including the more common ones of glass break and motion sensors. There are many different kinds of security systems one can obtain as well as 'home brew' one using various home automation techniques. Installation of your own home security system offers cost savings, increased available options, and flexability for future changes.

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