ELSNER 70534 KNX S4-B12 DES Actuator for 4 Drives with 3 Limit

The KNX S4-B12 DES and KNX S1R-B4-UP DES actuators are electronic control units for the control of three-stroke motors, such as those used for shutters. Two separate descent commands allow you to position the slats in a working position (downhill end 1) or in a closed position (descent 2)

These actuators are particularly interesting for KNX projects in Switzerland, Luxembourg and Belgium: the KNX S4-B12 DES and the KNX S1R-B4-UP DES meet country-specific requirements for shading as protection from heat and glare.