Siemens Simatic M7-400 Manual do Utilizador Página 535

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Interface Submodules
13-39
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Non-Isolated Measured Value Sensors
Potential differences must not arise between non-isolated measured value sensors.
If necessary, you must take additional installation measures (equipotential bonding
conductor) to ensure this.
Figure 13-14 shows the connection of non-isolated measured value sensors.
+
-
V
E0
Non-isolated
measured value
sensors
Ground bus
+
-
V
E1
M
SENSOR
MV
0+
M
0-
MV
1+
M
1-
Figure 13-14 Connection of Non-Isolated Measured Value Sensors
Connection of Voltage Sensors
Figure 13-15 shows the connection of voltage sensors to the analog input module.
+
-
U
+
-
U
+24 V
MV
0+
M
0-
MV
1+
M
1-
M
L+
V
CM1
V
CM0
0 V
Figure 13-15 Connection of Voltage Sensors
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