Connecting The Holding Brake - X7 (Feed Drive Only) - Siemens SINUMERIK 808D ADVANCED Commissioning Manual

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