Electrical connection
8.3 System integration
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
387
Table 8- 16 Order numbers
Order number (article number)
Connector size M23 with full thread
Connector size M23 with SPEED-CONNECT 6FX2003-0LU30
Prefabricated cable with full thread
1)
Prefabricated cable with SPEED-CONNECT 6FX5002-5CG10-☐☐☐☐
1)
The last 4 digits are the length code. You can find additional information in Catalog D 21.4 (2017),
Link to the Chapter "SIMOTICS Servomotors" in Catalog D 21.4
(https://support.industry.siemens.com/cs/document/109747019/
)
Connecting the holding brake
Direct connection
The holding brake in the motor is directly connected to the SINAMICS converter using
MOTION-CONNECT power cables with integrated brake connecting cable. See Chapter
"Connecting to a converter (Page 376)"
Connection to external power supply
You can also control the holding brake via an external power supply.
The external power supply can be a PELV (PELV = Protective Extra Low Voltage) power
supply, if:
● Protective separation from the motor winding is guaranteed for the brake cable in the
motor
● The power cable has reinforced insulation
Note
The relay K1, located between coil and contact, must also have reinforced insulation to
protect the internal logic voltage.
If you control the holding brake via an external power supply, you must protect the holding
brake from voltage peaks with a protective circuit. See figure "Suggested circuit for the
external power supply"
The protective circuit also guarantees the specified switching times, see Chapter "Technical
specifications (Page 76)".
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