Device description
Leuze electronic GmbH + Co. KG
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 of the 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