Electrical connection
Leuze electronic GmbH + Co. KG
MSI-SR5B
22
The following circuit shows the connection of two safety switches for safeguarding flaps with no possibility
of stepping or reaching behind. The automatic start/restart must be suitable for safety-related applications.
Figure 7.5: Two safety switches, two-channel, automatic restart, separate supply lines to the switches
required, central wiring
The following connection example shows a double-muting application, each with two locally connected
muting sensors and shared evaluation of the OSSDs by the safety relay. Optimization of the wiring is
achieved by the local connection of the two reset buttons and by contactor monitoring via the safety relay
in the cabinet. The muting function for each is integrated in the AOPDs.
*
Use appropriate spark extinction circuits
**
Always use at least two contacts in the release circuit. Only use sequential contactors with positive-
guided contacts.
Figure 7.6: Two type 4 AOPDs each with two safety-relevant transistor outputs, with two muting sen
-
sors, two manual restarts (RES) and contactor monitoring (EDM)
The following connection example shows danger zone guarding by means of a laser scanner and safe
-
guarding of a service door with a safety switch. Due to the separate danger zones, a reset button is
provided for each sensor for unlocking the start/restart interlock. Contactor monitoring is performed in the
cabinet by the safety relay.
0V
MSI-SR5
7
21
13
15
23
6
8
+24V
5
16
22
24
14
(+U
b
)
(+S12)
(+S11)
(-S12)
(+S22)
(+S21)
(-S22)
(IV-O)
(RES-I)
(RES-O)
(0V-O)
(0V)
21
12
11
22
-A2
21
12
11
22
-A2
PE
+24V
0V
+24V
PE
0V
0V
0V
MLD 300,
MLD 500 - T
n.c.
1
6
3
3
-W 3
7
-W2
6
2
4
3
4
-W 1
1
5
-W 2
7
2
1
-A2
4
3
2
1
-A 1
5
MODE/MS2
n.c.
5
n.c.
MLD 330, MLD 530 - R
+24V
+24V
EDM
RES/W
A
RN
OSSD2
OSSD1
8
M-EN/T
O
SH
SH
0V
0V
MLD 300,
MLD 500 - T
n.c.
1
6
3
3
-
W 3
7
-W2
6
2
4
3
4
-
W 1
1
5
-W 2
7
2
1
-A2
4
3
2
1
-A 1
5
MODE/MS2
n.c.
5
n.c.
MLD 330, MLD 530 - R
+24V
+24V
EDM
RES/W
A
RN
OSSD2
OSSD1
8
M-EN/T
O
MS2
4
2
1
MS1
5
RES/LMP
+24V
SH
SH
SH
-W3
1
3
2
30
32
29
31
A1
A2
-K
3
1
2
1
2
L+
L+
L-
L-
-K3
-K4
MSI-SR 5B
5
-A 3
6
23
13
14
15
16
24
A1
A2
-K
4
*
*
7
8
21
22
+24V
0V
+S21
-S12
IV-0
-S22
RES-I
RES-O
0V-O
+S12
+S22
+S11
“M”
x1
x2
-MS1
+ -
-MS2
+ -
FE
FE
3
0V
FE
4
5
MS2
4
2
1
MS1
5
RES/LMP
+24V
SH
-W3
1
3
2
“M”
x1
x2
-MS1
+ -
-MS2
+ -
3
0V
FE
4
5
