6.11 Connecting the closed-loop control
6.11.1 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.
● Always apply all of the necessary protective measures.
● Always observe the five safety rules when working with the drive.
● Follow these steps when grounding the machine:
– Establish the connections in a cabinet.
– Ensure that the connections are also established over several cabinets.
– Establish the ground connection for the whole plant immediately.
6.11.2 Connecting the auxiliary voltage
Connect the auxiliary voltage (e.g. for SITOP) to the terminal block. The maximum cross-
section of the cables is 2.5 mm
2
. You will find detailed information in the terminal diagram or
in the circuit manual under "Technical specifications and drawings".
See also
Technical specifications and drawings (Page 139)
6.11.3 Connecting circuit breakers
To connect the circuit breaker, proceed as follows:
1. Disconnect the cabinet from the power supply.
2. Route the control cables into the cabinet from below.
3. Connect the shields of the control cables to the serrated bar. For additional information,
see Chapter "Using the equipotential bonding strip and shield bus (Page 79)".
4. Connect the control cables as specified in the circuit manual.
Electrical connection
6.11 Connecting the closed-loop control
SINAMICS GL150 6SL38503UM114PA0Z
84 Operating Instructions 04/2017
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