MSI-EM200-4RO safe extension module
Leuze electronic
MSI 100/200
43
Block diagram
Figure 5-2
MSI-EM200-4RO block diagram
Insulation coordination
The following table shows the insulation of the relay outputs between one another and for the
logic area of the device.
Legend:
Logic
TBUS
SAFE
TBUS
SAFE
Monitoring
Outputs
A1
M0 M1 M2 M3
A2
13 23 33 43
K1
K2
K3
K4
14 24 34 44
Power
24V DC
Table 5-1
Insulation coordination
A1A2
24V/0V
13/14
23/24
33/34
43/44
A1A2
24V/0V
-
6 kV ST
6 kV ST
6 kV ST
6 kV ST
13/14
-
-
4 kV BI
4 kV BI
4 kV BI
23/24
-
-
-
4 kV BI
4 kV BI
33/34
-
-
-
-
4 kV BI
43/44
-
-
-
-
-
BI
Basic insulation
ST
Safe insulation
Basic insulation
(Rated surge voltage 4 kV)
A mix of safe extra-low voltage and low voltage is not permitted.
Safe insulation / reinforced insulation
(Rated surge voltage 6 kV)
Reinforced insulation (e.g., through larger clearances and creepage distances of the con-
ductor tracks) is designed to a higher overvoltage category than the basic insulation. It is,
therefore, not possible to mix safe extra-low voltage circuits U
25 V AC or U
60 V DC
and circuits with higher voltage.