Wiring method : 1. Direct control mode wiring The electrical be controlled is single-phase power supply, Power consumption does not exceed the rated capacity of the switch(Resistive load 10A Inductive load 5A ),Can be used to directly control mode 2. Single-phase expansion mode wiring The electrical be controlled is single-phase power supply, Power consumption does not exceed the rated capacity of the switch.Then you need a capacity in excess of the electrical power to the expansion of exchanges and contacts 3. The three-phase working mode wiring The electrical be controlled is three-phase power supply ,It requires an external three-phase AC contactor. Control contactor coil voltage is AC220V '50Hz ' s wiring mode.Note 1.Details page pictures is only for reference, part of a difference does not affect the user experience, please know it. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Please forgive it. Product Features : SCM control , more reliable Original AC 10V probe signal transmission, 500m , and more secure Hight-quality electronic components to ensure low failure rate , stable operatiSpec : Working voltage : 220V Length of sensor cable: 2m or 5m Rated power : 1100W Probe distance : 300M Manual and automatic switching : Yes