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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 3.1:
MSI-SR4B with screw terminals
A1 (+24V)
S33
+
~
=
MSI- SR4B
A2 (0V)
Figure 3.3:
Internal circuit diagram MSI-SR4B
Leuze electronic
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
S34 S35
S31
S22
13 23 33
CH1
K1
CH2
K2
S12
14 24 34
Figure 3.2:
MSI-SR4B with spring-cage terminals
41
42
MSI-SR4B
Device description
8
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