The four-channel switch actuator with current detection is mainly used in the building control system. It is installed as a system through the EIB/KNX bus and other bus devices, and is mainly used to control the switch load. The switch actuator can switch 4 to 12 independent electrical AC loads or three-phase loads.The maximum load current output by each switch actuator is 16 A, and it can be manually turned on or off, and its switch status can be seen.