Connecting To The Infeed; Connecting The Motor Cables - Siemens SINAMICS S120 Manual

Establishing the connection
Connect the cable to the terminal block in the next transport unit:
● 2-phase cable (1-3): for 230 V AC at terminals -X140:1, 3
● 2-phase cable (1-4): for 24 V DC at terminal -X150:1, 4
4.5.5.4

Connecting to the infeed

Description
The voltages provided on the auxiliary power supply system must be produced by an
auxiliary power supply (e.g. by an Auxiliary Power Supply Module or by option K76 "Auxiliary
voltage generating unit in the Line Connection Module").
If an Auxiliary Power Supply Module is not available to supply power to the auxiliary power
supply system or if the Auxiliary Power Supply Module and the Cabinet Modules to be
supplied are installed in different parts of the cabinet line-up, an auxiliary power module in
the Basic Line Connection Module or Active Line Connection Module can be used to feed
power to the auxiliary power supply system. The maximum current-carrying capacity of the
auxiliary power supply system is 32 A. In the case of the external power supply, this must be
protected on the line side.
4.5.6

Connecting the motor cables

Preparatory steps
● Install and secure the cabinet units properly.
● Disconnect the cabinet units from the power supply.
● Make sure that all the necessary safety measures have been taken at the installation
location.
Electric shock when permanent magnet synchronous motors rotate
As soon as the motor rotates, a voltage is generated at the terminals, which when touched,
can result in death or severe injury.
• Electrically disconnect the motor when working on the converter.
• If it is not possible to disconnect the connecting cables to the motor, secure the motor so
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
WARNING
that it cannot undesirably rotate, e.g. using a holding brake.
Electrical installation
4.5 Connections
91