Siemens SINAMICS G120 Hardware Installation Manual page 86

Spare parts and accessories
8.3 Optional accessories
Note
Brake Relay and Safe Brake Relay
The Brake Relay and the Safe Brake Relay do not differ from each other in the installation and
the connection to the inverter.
Connection to the inverter
To ensure that you have the correct cable for connecting the Brake Relay irrespective of the
inverter size, you are supplied with two preassembled cables with different lengths. Connect
the appropriate cable to the Brake Module and to the inverter as shown below.
If you are using your own cable, ensure that the cable is insulated and rated for 600 V.
Connecting the motor holding brake via a PELV circuit
The Brake Relay must be connected to the protective conductor if the motor brake is supplied
from a PELV circuit.
Brake Relay - connection and circuit diagram
86
Rectifier
terminal box
Hardware Installation Manual, 11/2016, A5E37800827C AB
e.g. in the
motor
PM240P-2 Power Modules