Braking Relay; Technical Data Of The Brake Relay - Siemens SINAMICS G120 Installation Manual

8.9

Braking relay

The converter 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
There are no differences between the Brake Relay and the Safe Brake Relay in terms of
installation and connection to the converter.
Connection to the converter
To ensure that you have the correct cable for connecting the Brake Relay irrespective of the
converter size, you are supplied with two preassembled cables with different lengths.
Connect the appropriate cable to the Brake Module and to the converter 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.
Note
The Brake Relays are not limited regarding switching cycles.
8.9.1

Technical data of the brake relay

Input voltage
Input current
Max. connection cross-section:
Degree of protection
Switching capability of the NO
contact
Output voltage
Output current
External, controlled power supply required. Recommended voltage: 26 VDC
1)
Power Module PM240-2
Hardware Installation Manual, 01/2020, A5E33294624B AL
Brake Relay
6SL3252-0BB00-0AA0
via the Power Module
via the Power Module
2.5 mm²
IP20
1-phase 440 VAC, 3.5 A
1-phase 30 VDC, 12 A
-
-
Accessories
8.9 Braking relay
Safe Brake Relay
6SL3252-0BB01-0AA0
20.4 ... 28.8 VDC
1)
Max. 2.5 A
2.5 mm²
IP20
-
24 V
max. 2 A
141