This wiring guide is the first in a series of topics designed to make the installation of a Honeywell security system simple. A fresh out of the box Vista 20P and an assortment of it's most popular accessories will be wired from scratch and then programmed to meet the needs of a typical do-it-yourself installation.
The transformer converts your 110 volt house voltage into a low voltage, current limited power source for the alarm panel. Neither the transformer or panel wiring is polarity sensitive (the red and black wire can connect to either terminal of the transformer or control panel). Make sure not to plug in the transformer before all other wiring is complete.