Siemens Sinamics PM250 - Connecting a Motor Holding Brake

Spare parts and accessories
8.2 Optional accessories
PM250 Power Module
Hardware Installation Manual, 01/2016, A5E36265179B-AA
81
8.2.5
Connecting a motor holding brake
The inverter uses the Brake Relay to control the motor holding brake. Two types of Brake
Relay exist:
● The Brake Relay controls the motor holding brake
● The Safe Brake Relay controls a 24 V motor holding brake and monitors the brake control
for short-circuit or cable breakage.
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 show
n below.
If you are using your own cable, ensure that the cable is insulated and rated for 600
V.