The dS Alarm 400 module is designed to convert up to four low voltage signals to the digitalSTROM system. This means that, for example, four window contacts, glass breakage or water sensors can be monitored via wiring (closed-circuit principle). The 12 volt DC line voltage is generated in the module itself. It is installed in a standard flush-mounted box. The AKM200 terminal technology integrated in the module translates the states of the four lines into the digitalSTROM system. This means that, for example, each contact/sensor can be assigned a precise location.