Mounting and connecting the device 
  3.2 Mounting the device 
SIMATIC IPC PX-39A PRO 
Operating Instructions, 11/2022, A5E51699950-AA  
49 
7.  Connect all cables according to the description in section "Connecting the device". 
8.  Fasten the cover plate ⑤ to the device with the 2 screws, torque 1.5 Nm.  
Check that the seal is sitting correctly. 
9.  Fasten the cover plate ⑨ from the PRO device product package with 4 M4x12 screws, 
torque 1.5 Nm.  
Alternatively, you can extend the PRO device by adding an Extension Unit at the bottom. 
Read the associated documentation.