Connecting up   
6.7 Functional ground 
  SCALANCE XM-400 
64  Operating Instructions, 09/2018, C79000-G8976-C306-08 
 
Functional ground 
Position 
The functional ground is established via a grounding screw. 
The connector for the grounding cable is in the center of the underside of the device. 
 
Figure 6-5  Position of the grounding bolt on the SCALANCE XM-400 
Connecting up functional ground 
 
Grounding terminal with cable 
Bolt with spring washer and washer 
Follow the steps below to connect the functional ground: 
1.  Loosen the grounding screw. 
2.  Put the grounding terminal 
①, and the bolt ② together as shown in the drawing. 
3.  Screw in the bolt 
② with a maximum tightening torque of 1.5 Nm.