Compatible with ALL3418v2/3419/3500/4500/5000 1-port contact input module in the housing Connection of a (potential-free) contact Open contacts are rated as 2,5 cm ( 1 inch ), closed ones as "0 - ideal, for example, for quiescent current loops (door contacts) with pulse extension For For operation on the control panels, a suitable patch cable in your desired length is required ATTENTION NOT COMPATIBLE WITH OLD SERIES ALL3000/4000 The ALL4440 is an I2C single-contact input for the ALLNET MSR series of generation 2 (ALL3418/3419/3500 etc.) The ALL4440 has 2 connections: 1x RJ45 I2C interface, where you can connect a suitable patch cable of your desired length (not included in delivery). On the other hand, you can use the 2 green PINS to connect the optional door contacts (ALL3041) to the vibration alarm (ALL3044) to the shock sensor (ALL3043).