SIEMENS
“The prevention of accidents should not
be regarded as a requirement of the law,
but rather as an act of human obligation
and economic sense.”
Werner von Siemens, 1880
Drive
Currently available integrated safety functions
STO
SS1
SS2
SOS
SBC
SLS
SSM
SDI
SLP
SP
SBT
SINAMICS V90
✔
SINAMICS G120C
✔
SINAMICS G120
✔
✔
✔
✔
✔
✔
SINAMICS G120D / G110M*
✔
✔
✔
✔
✔
SINAMICS G130 / G150 / G180**
✔
✔
✔
✔
✔
✔
SINAMICS S110
✔
✔
✔
✔
✔
✔
✔
✔
SINAMICS S120 Booksize and Blocksize
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
SINAMICS S120 Chassis and Cabinet Modules
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
SINAMICS S150
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
SINAMICS SM150
✔
*G110M only STO
**G180 only STO
Functions to safely stop the drive:
Safe Torque Off (STO)
“Safe Torque Off” ensures that torque is no longer output
at the motor shaft.
Safe Stop (SS1) with/without encoder
“Safe Stop 1” safely brakes drives with a high kinetic
energy before STO is activated.
Safe Stop (SS2) with encoder
“Safe Stop 2” safely brakes drives with a high kinetic
energy and activates SOS.
Safe Operating Stop (SOS) with encoder
“Safe Operating Stop” (as alternative to STO) brings the
drive into closed-loop position control, maintains its
position and monitors standstill.
Safe Brake Control (SBC)
After STO, “Safe Brake Control” activates a holding brake
so that the drives can no longer move, e.g. as a result of
gravity.
Functions to safely monitor the speed of a drive:
Safely Limited Speed (SLS) with/without encoder
“Safely Limited Speed” prevents specified maximum speeds
from being exceeded.
Safe Speed Monitor (SSM) with/without encoder
“Safe Speed Monitor” signals once a specified speed has
been fallen below.
Safe Direction (SDI) with/without encoder
“Safe monitoring of motion/direction of rotation” ensures
that the selected direction of rotation is maintained.
Safely Limited Position (SLP) with encoder
“Safely Limited Position” prevents a specified position
from being exceeded.
Safe Position (SP)
“Safe Position” transfers the position values, safely deter-
mined in the drive, to a safety-related control system via
safe PROFIsafe communication.
Safe Brake Test (SBT)
“Safe Brake Test” checks the specified holding torque of a
brake.
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For SINAMICS, the safety functions integrated in the drive can be roughly sub-divided into two classes: