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Functional safety technology
Page 65
Product Manual
“Servo drive DIS-2 310/2 FB FS STO“
Version 4.0
6.5
Circuit examples
6.5.1
"Safe Torque Off" (STO)
1
Servo drive with a safety module
(only the relevant connections are shown)
2
Emergency-stop switch
3
Protective door
4
Light curtain
5
Safety switching device
Figure 10:
Circuit example "Safe Torque Off" (STO)
The "Safe Torque Off" (STO) safety function can be requested by various devices. The switch S1 can
be, for example, an emergency-stop switch, a switch of a protective door, a light curtain, or a safety
switching device. The safety request is realised via two channels and via the switch S1. As a result, the
output stage will be switched off via two channels. Once the output stage has been switched off, this is
output by the floating contact REL1/REL2.
1
2
3
4
5
L 230V AC
N 230V AC
PE
24V DC
C6 C5 C4 B8 B4
L1
PE
+
2
4
V
GND
N
-X1
A5
DIN9
-X1
1
5
2
S
T
O1
S
T
O2
-
X
4
0
A
u
sg
a
n
g
S
P
S
:
Reg
ler
-F
re
iga
b
e
Nur relevante Anschlüsse gezeichnet!
Ohne Querschlusserkennung!
0V DC
4
6
RE
L
1
RE
L
2
E
ing
a
n
g
S
P
S
:
S
a
fe
ty
Rückm
e
ldu
n
g
S1
sender
receiver
O
SSD
1
O
SSD
2
S1
S1
S1
Sicherheits-
schaltgerät
1
3
2
4
1
3
4
2
1
3
4
2
1
3
4
2
oder
oder
Metronix DIS-2 310/2 FB FS STO
GND
Only the relevant connections are shown!
Without crossfault detection!
P
L
C inp
u
t:
sa
fe
ty
fe
e
d
b
a
ck
P
L
C
o
u
tp
u
t:
se
rvo
d
rive
e
n
a
b
lin
g
or
or
Safety
switching
device
transmitter