Connecting Voltage Sensors - Siemens SIMATIC S7-300 Reference Manual
Programmable logic controllers module data
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Analog Modules
4.9
Connecting Voltage Sensors
Note
The necessary connecting cables, which result from the potential connection of the
analog input module and the sensors, are not drawn in the figures shown below.
In other words, you must continue to take note of and implement Section 4.8 with
its generally valid information for connecting sensors.
Abbreviations and mnemonics used in the figure below
The abbreviations and mnemonics used in the figure below have the following
meanings:
M +:
M–:
M
ANA
M :
L +:
U +:
Connection of voltage sensors
Figure 4-11
4-50
Measuring lead (positive)
Measuring lead (negative)
:
Reference potential of the analog measuring circuit
Ground terminal
Terminal for 24 VDC supply voltage
Measuring lead for voltage input
L+
M
+
M+
U
M–
–
M+
+
M–
U
–
M
Connecting Voltage Sensors to an Isolated AI
ADC
ANA
Programmable Logic Controllers S7-300 Module Data
Backplane
bus
A5E00105505-03
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