Lenze i550

Basic Safety - STO
DANGER!
With the "Safe torque o" (STO) funcon, no “emergency stop" can be executed according to EN 60204−1
without addional measures. There is no electrical isolaon between the motor and inverter and no service
switch or maintenance switch!
Possible consequences: Death or severe injuries
▶
"Emergency stop" requires electrical isolaon, e. g. via a central mains contactor.
Connecon diagram
The connecon diagrams shown are only example circuits. The user is responsible for the correct
safety-related design and selecon of the components!
Acve sensors
STO
X1
SIA
GS
SIB
"
S1
S1 Acve sensor - example of light grid
Passive sensors
STO
X1
SIA
GS
SIB
"
S2
S1
X1
SIA
GS
SIB
"
S1
DC 24 V SELV/PELV
+24 V 0 V
S1 Passive sensor
S2 Safety switching device
S1 Passive sensor
Electrical installaon
Funconal safety
Basic Safety - STO
169