Safety Integrated Engineering With Starter - Siemens SINAMICS G120 Manual

3.3 Safety Integrated
All control units CU240E-2 come with the Safety Integrated function STO (Safe Torque Off).
Activating the STO function immediately ensures that the motor cannot supply any further
torque-generating energy.
Advantages for the user:
• No wearing parts, thanks to electronic shutdown
• Inverter remains connected to the supply, and always supports full diagnostics capability
• Password protected, no manipulation of the function possible
We strongly recommend that Safety Integrated engineering only be performed using the
STARTER tool. In so doing, you are guided by graphical explanations and the risk of wrong
inputs is reduced to a minimum.
STO can be used in cases where motor can decelerate to a standstill by itself within a suffi-
ciently short period of time on account of the load torque or friction, or in situations where
safety issues do not arise as a result of the motor "coasting down."
v
STARTER software and PC:
58
STO
Safety Integrated
t
The CU240E-2–F and
CU240E-2 DP-F control
units include more Safety
Integrated functions. They
have SS1 (Safe Stop 1)
and SLS (Safely Limited
Speed) also integrated – no
encoder needed! You can
find more information on
those advanced features
in the SINAMICS Safety
brochure at
http://www.automation.
siemens.com/infocenter/
order_form.aspx?tab=3&
nodekey=key_518445&l
ang=en
Note