Loop explanation

I know how to program loops per instructions. I know the loop one is for the external wire on the thin contact and loop 2 is for the magnet

Could someone explain in layman’s terms loops and how that corresponds with open and closed settings and what that means. Not just for the thin contact but for other things. I especially get confused if there are 3 loop options. Thanks in advance

To me it’s easiest to think of loop numbers as just an extension of the txid or serial number. The txid/serial number uniquely identifies a device (such as a 2GIG-DW10-345). A device can have multiple sensors on it. The loop number is what identifies each sensor on the device. There is no inherent meaning of a loop number, it’s just an ID. The Honeywell 5800 series wireless signaling protocol supports 4 loop numbers per device so the manufacturer who designs the device can assign whatever function they want to those 4 loop numbers. Many devices are designed to just use loop 1. The 2GIG-DW10-345 uses loop 1 for the wired sensor input and loop 2 for the magnetic reed switch. For each device you install, you have to look at the manual and see what that device uses each loop number for.

Here’s a related post from a while back:

what about existing motion sensors thur a take-345 box?

All TAKE-345 zones are Loop 1.