Lenze i550 Series - Basic Safety - STO; Connection Diagram

Basic Safety - STO
DANGER!
With the "Safe torque o" (STO) funcon, no “emergency‑s
top" 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
Acve sensors
STO
X1
SIA
GS
SIB
"
S1
S1 Acve sensor - example of lightgrid
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 Sa
fety - STO
183