If you can't run a wire back to the panel, you can wire the steel door contact to the Honeywell 5816 door and window sensor, which can serve as both a wired and wireless zone at the same time. This product, and other Honeywell sensors, feature internal screw terminals designed to connect a wired contact. If using the wired zone, program to Loop 1. For the wireless zone, program to Loop 2.
Can Honeywell's wireless sensors be used on metal doors and frames?
If you can't run a wire back to the panel, you can wire the steel door contact to the Honeywell 5816 door and window sensor, which can serve as both a wired and wireless zone at the same time. This product, and other Honeywell sensors, feature internal screw terminals designed to connect a wired contact. If using the wired zone, program to Loop 1. For the wireless zone, program to Loop 2.