6.5 Connecting ground
DANGER
Insufficient grounding
The drive must be grounded to ensure that it operates safely and reliably. If the drive is
operated with insufficient grounding, then the protection and monitoring functions can fail.
Death, serious injury, or material damage will result.
To ensure the correct functioning of the protection and monitoring equipment, ground the
device.
To ensure the drive operates safely, connect a protective grounding conductor.
A grounding bar and a grounding lug can be found in the lower area of the cabinets. Grounding
bar and grounding lug are used for grounding the components installed in the cabinet.
① Grounding bar
② Grounding lug
Image 6-4 Example: Grounding bar and grounding lug
6.6 Laying the signal lines
NOTICE
Malfunction due to common cable installation
Malfunctions can occur in the converter if cables with differing voltage levels are laid together
with internal cables in one cable duct in the cabinet.
Do not run cables coming from the outside, for example to the terminal strips, together with
internal cables in one cable duct.
Electrical connection
6.6 Laying the signal lines
SINAMICS SM120 6SL38855?B
Operating Instructions 12/2015 79
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