Device description
Leuze electronic
MSI-SR4B
8
3
Device description
The MSI-SR4B E-Stop relay is used as a connecting element between optoelectronic protective devices
of type 3 or 4 as well as a sequential device for 1- or -2-channel protective-door and E-Stop monitors and
the machine control.
The safety relay is intended for installation on the DIN rail in the cabinet and is wired via the 16 terminals .
All connection terminals are pluggable. The individual terminal blocks are mechanically coded to prevent
swapping or skewed plug in. The safety relays are available with screw terminals or spring-cage terminals.
Figure 3.3: Internal circuit diagram MSI-SR4B
Figure 3.1: MSI-SR4B with screw terminals
Figure 3.2: MSI-SR4B with spring-cage terminals
N.O.
N.O.
13 23 33
14 24
34
S33
K1
K2
A1 (+24V)
A2 (0V)
CH1
CH2
~
=
+
S34 S35
S22
S31
S12
MSI- SR4B
N.O.
42
41
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