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If the Siemens positioner is set to the input level “P manual mode”, the power supply must already be connected, and the air supply must be connected immediately thereafter. It is also necessary to ensure proper air quality: oil-free industrial air with dust particles of <30μm, and the dew point at operating pressure F should be 20K lower than the lowest ambient temperature. The two pneumatic single-acting linear actuators are installed together directly at the back of the Siemens positioner. · Pressure position Y1: After connecting the air outlet E, secure it with the provided screws. Through the collection area and spring area, the air outlet E ensures a dry flow of instrument air to prevent corrosion. https://img-blog.csdnimg.cn/20201116135843949.pngdata:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw== The specific steps are as follows: 1. The air inlet pressure and the actuator pressure must be connected to a pressure tank. 2. The connection uses metric thread G1/4 DIN 45141. PZ: Inlet air pressure 1.4~7 bar. Y1: Pressure for Siemens actuator 1; use single-acting or double-acting actuators. Y2: Pressure for Siemens actuator 2; use double-acting actuators. E: Exhaust outlet (remove the silencer if necessary). 3. Safety setting in case of power failure: Single-acting: Release pressure at Y1; Double-acting: Maximum positioning pressure at Y1 (inlet air pressure) ； For Y2 vent 4, connect the Siemens positioner pressure Y1 or Y2 (only for double-acting actuators) and set it safely according to the instructions. 5. Connect to inlet air PZ. Finally, one small detail to note: spring-return actuators require a sufficiently high air supply pressure in order to move the linkage to the farthest position of the actuator.