Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 357

9 Cabinet Design and EMC
9.4 Application examples
Prerequisite
Actuating
EMERGENCY
STOP
Limitations
Block diagram
9-356
Is required to charge the DC link and move the drive:
S
EMERGENCY STOP is released and the safety relay –A1 is reset via push-
button –S1.
S
Safety relay –K1 and line contactor –K2 are controlled by the contacts of
safety relay –A1.
S
The instantaneous contacts of safety relay –A1 are opened. The axis–speci-
fic control enable RF (terminal 65) is switched to low. The drive is immedia-
tely braked to zero speed at the current limit.
S
After the delay time of –A1 has expired, safety relay –K1 and line contactor
–K2 are switched into a no–voltage state. The NO contacts open, and the
motor is disconnected from the torque–generating power supply through two
channels.
S
This behavior corresponds to stop Category 1, according to EN
60204–1:2006.
S
If the pulses are canceled before the drive comes to a standstill, then it co-
asts down.
S
Suspended/hanging axes must be secured using holding brakes or similar.
–S3
Fig. 9-15 Block diagram of the supplementary EMERGENCY STOP safety function
SENSE subsystem
The safety functions are initiated by the EMERGENCY STOP pushbutton,
which can be released by turning, and which is connected through two chan-
nels. This has positively opening contacts.
Fault exclusion is assumed for the positively opening contacts as well as for the
mechanical system of the EMERGENCY STOP pushbutton. An accumulation of
faults between two consecutive actuations of the EMERGENCY STOP pushbut-
ton can result in the safety function being lost. This behavior corresponds to
Category 3.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
–K2
–A1
–K1
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