The ZSK 2 is a modern light time pulse switch (impulse switch) that combines a high degree of comfort, flexibility and functionality with easy handling and operation. By pressing the light button briefly or for a longer period of time, you can choose between two independently adjustable time ranges. This enables individually configurable short-term / long-term switching in a range of 0.25 to 150 minutes. Pressing the light button again switches off the consumers immediately. Two operating modes allow the long-term switching to be blocked. The ZSZ 2 contains an additional external voltage input (8v-230V UC) that is galvanically isolated from the other inputs and outputs and can be controlled by a door intercom system without a coupling relay, for example, and two additional inputs for central switching on and off., Dimensions: 18x55mm, 230V AC - 1 NO contact (potential-free) 16A, tvK/tvL -18/-150min