Electrical connection
Leuze electronic
MC3x
34
Figure 7.13: Example 1: Two-channel connection of an MC3xS2x with start/restart interlock and contactor
monitoring (EDM), contact drawing without activation by actuator
The following wiring diagram shows the connection of two MC3xS2x for achieving safety category 3 and
Performance Level e or d. If the guard cannot be reached or stepped around the “Automatic start/restart”
operating mode is permissible for the benefit of an efficient system design.
Figure 7.14: Example 2: Connection of two MC3xS2x with automatic start/restart and contactor monitor
-
ing (EDM), contact drawing without activation by actuator
The following wiring diagram shows the connection of several MC3xS2x for achieving safety category 3
and Performance Level e or d in the case of access safeguarding (start/restart interlock, EDM). Up to 30
moveable guards can be monitored in this way. Safeguarding in the switch-off circuit must satisfy the spec
-
ifications for K1, K2 as well as those of the downstream contactors.
Figure 7.15: Example 3: Connection of four MC3xS2x with start/restart interlock, contact drawing without
activation by actuator
0V
MSI-MC311
S11
S12
EDM
S22
A2
S21
+24V
A1
SR2
SR1
MC3xS2x
K3
K4
0V
MSI-MC311
S11
S12
EDM
S22
A2
S21
+24V
A1
SR2
SR1
MC3xS2x
K3
K4
MC3xS2x
0V
MSI-MC311
S11
S12
EDM
S22
A2
S21
+24V
A1
SR2
SR1
MC3xS2x
MC3xS2x
MC3xS2x
MC3xS2x
K3
K4
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