Siemens SINUMERIK 808D ADVANCED

Commissioning Manual
01/2017
117
Behaviors of the STO function
Terminal
State
Action
STO1
STO2
High level High level Safe The servo motor can normally run when you power on the servo
drive.
Low level
Low level
Safe
The servo drive starts up normally but the servo motor cannot run.
High level
Low level
Unsafe
Alarm occurs and servo motor coasts down.
Low level
High level
Unsafe
Alarm occurs and servo motor coasts down.
For more information about the STO function, see the SINUMERIK 808D/SINUMERIK 808D ADVANCED Function Manual.
4.4.5
Connecting the holding brake - X7 (feed drive only)
Holding brake (drive side)
Type
Illustration
Signal
Description
Brake interfaces
Phase B+
B+: + 24 V, motor brake voltage positive
Phase B- B-: 0 V, motor brake voltage negative
Maximum cable cross-section: 1.5 mm
2
Input voltage tolerance: 24 V ± 10%
Holding brake (motor side)
Type
Illustration
Signal
Description
Brake connector
1: B+
Phase Brake +
2: B- Phase Brake -
Wiring