Connections And Cables - Siemens SINAMICS G120D Operating Instructions Manual

4.2.7

Connections and cables

Danger of electrical shock by touching the pins in the motor terminal box
The temperature sensor and motor holding brake connections are at DC link negative
potential. Touching the pins in the motor terminal box can lead to death due electrical
shock.
• Keep the motor terminal box closed whenever the mains is applied to the converter.
• Insulate the cables that are not used.
• Use appropriate insulation on the cables.
NOTICE
Damage of the converter by disconnecting the motor during operation
The disconnection of the motor cable by a switch or contactor during operation may
damage the converter.
• Disconnect converter and motor during operation only if it is necessary in terms of
Connectors
"Switched" and "unswitched" 24 V power supply
The unswitched 24 V power supply (1L+) is required for the device to function.
The switched 24 V (2L+) supplies the two digital outputs. Switching brings all of the actuators
connected to the digital outputs into the no-voltage state.
If you don't need the switching of 2L+ power supply, then both the switched as well as the
non-switched 24 V may come from the same supply.
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
DANGER
personal security or machine protection.
Installation
4.2 Electrical Installation
41