Analog Modules
4-51
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
4.10 Connecting Current 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 figures below
The abbreviations and mnemonics used in the figures below have the following
meanings:
M +: Measuring lead (positive)
M–: Measuring lead (negative)
M
ANA
: Reference potential of the analog measuring circuit
M : Ground terminal
L +: Terminal for 24 VDC supply voltage
I +: Measuring lead for current input
Supply voltage of the sensors
The 2-wire transmitter receives its short-circuit-proof power supply via the
terminals of the analog input module.
This transmitter then converts the measured variable into a current. Two-wire
transmitters must be isolated sensors.
Four-wire transmitters have separate power supplies.
To Next Page
Loading...
Need help?
General
