Siemens Sinamics G120 CU240E Operating Instructions Manual page 136

Functions
5.10 Technological functions
Timing of the motor holding brake after an OFF2 or STO command
Contrary to a standard motor holding brake, after an OFF2 command, the brake is
immediately closed. The normal timing sequence of the motor holding brake function is
interrupted by the following signals, without taking into account the brake closing time:
● OFF2 command, or
● For fail-safe applications, in addition, after "Safe Torque Off" (STO)
136
Inaktiv
OFF2
Active
Motor excitation
finished
P0346
1
0
Open
Closed
Brake Release Time
Figure 5-11 Function diagram, motor holding brake after an OFF2 command
t
t
t
t
t
Brake Closing Time
Operating Instructions, 08.10. 2008, t.b.d.
Frequency inverter