Siemens SINUMERIK 840D sl Manual page 167

Warning
In a fault situation, voltages as high as 2 kV can occur at chafed or damaged cables.
Depending on the speed of the motors, the motor terminal voltage of the 1FE1 motors can
attain values as high as 2 kV.
Connection example for VPM 120
Figure 5-40
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
Voltage Protection Module 120 connection
Connection of the Components
5.13 Voltage Protection Module (VPM)
5-83