Electrical connection
Leuze electronic
MSI-SR5B
23
*
Use appropriate spark extinction circuits
**
Always use at least two contacts in the release circuit. Only use sequential contactors with positive-
guided contacts.
Figure 7.7: One type 3 AOPD with two safety-related transistor outputs, one safety switch, manual re
-
start (RES) and contactor monitoring (EDM)
7.4
Connecting to the machine control
The safety-related parts of the control include, in addition to the safety relay described above, the subse
-
quent control elements up to the power-transfer elements that are to be stopped safely and timely. Special
attention must be given here to the adherence to the required safety category. Important information on
this topic can be found in harmonized European standard EN ISO 13849-1.
Essential prerequisite for the safe operation is the possibility of electrically influencing the interruption of
the dangerous movement as well as a sufficiently short machine stand-still time. These must be incorpo
-
rated in the calculation of the safety distance as must the response times of the safety-related chain (safety
relay, AOPDs, contactors, etc.).
Other parameters, such as access speed or additional distance to be added to the safety distance, are
dependent on the respective applications and the resolution of the used AOPD. European standard
EN ISO 13855 includes calculation formulas and examples for various arrangements.
n.c.
FP
4
FP
3
FP
2
Al
arm
n.c.
Rest
ar
t
+24V
ROTOSCAN RS4-4
FP
1
n.
c.
n.c.
OSSD2
OSS
D
1
X1
X2
reserved
n.c.
n.c.
RS232/
422
RxD-
RxD+
TxD+
TxD-
8
1
15
9
1
5
6
9
13
6
7
8
-A 1
-X 2
1
-X 1
2
-X 1
1
3
12
11
10
9
4
12
-W 1
8
11
7
4
5
3
-W 1
6
5
SH
1
4
14 15
2
9
1
2
3
2
0V
PE
+24V
PE
+24V
0V
0V
1
Shield
Al
arm
2
Var. B
Var. A
-K 3
-K 4
-K 4
-K 3
30
32
29
31
A1
A2
-K 3
1
2
1
2
L+
L+
L-
L-
+24V
0V
MSI-SR 5B
5
-A3
6
23
13
14
15
16
24
+S21
-S12
A1
A2
-K 4
IV-0
-S22
RES-I
RES-O
*
*
7
8
21
0V-O
22
S20-P3C1-M20-FH
21
12
11
22
- A2
-S1
-K3
-K4
+S12
+S22
+S11
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