SIEMENS
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Siemens NC 62 · 2016
5
SINAMICS S120 drive system
Supplementary system components
Safe Brake Relay
■
Overview
Safe Brake Relay
With the Safe Brake Relay the brake is controlled in accordance
with IEC 61508 SIL 2 and EN ISO 13849-1.
■
Design
The Safe Brake Relay can be installed below the Power Module
on the shield connection plate.
The Safe Brake Relay has the following connections and
interfaces:
•
1 two-channel transistor output stage to control the motor
brake solenoid
•
1 connection for the cable harness (CTRL) to the Power
Module in blocksize format
•
1 connection for the 24 V DC power supply
The connection between the 24 V DC supply and the Safe Brake
Relay must be kept as short as possible.
The scope of supply of a Safe Brake Relay includes the following:
•
2 cable harnesses for connecting to the CTRL socket of the
Power Module
- Length 0.32 m (1.05 ft) for frame sizes FSA to FSC
- Length 0.55 m (1.80 ft) for frame sizes FSD to FSF
■
Integration
The 24 V DC solenoid of the motor brake is directly connected
to the Safe Brake Relay. External surge suppressors are not
required.
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Technical specifications
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Selection and ordering data
Article No.
6SL3252-0BB01-0AA0
Product designation
Safe Brake Relay
Power supply
20.4 ... 28.8 V DC
Recommended rated supply voltage
26 V DC (to compensate for voltage
drop in feeder cable to 24 V DC
motor brake solenoid)
Power requirement, max.
• Motor brake
2 A
• at 24 V DC
0.05 A + power requirement of
motor brake
Conductor cross-section, max.
2.5 mm
2
Dimensions
• Width
69 mm (2.71 in)
• Height
63 mm (2.48 in)
• Depth
33 mm (1.3 in)
Net weight
0.17 kg (0.37 lb)
Description
Article No.
Safe Brake Relay
Including cable harness for
connection to Power Module
6SL3252-0BB01-0AA0
© Siemens AG 2016