Connecting transducers
4.5 Wiring current transducers
Analog value processing
Function Manual, 06/2014, A5E03461439-AC
73
Wiring 2-wire transducers to an analog input for 4-wire transducers
The figure below shows an alternative to the above connection: supplying the 2-wire
transducer from supply line L+ of the module. If you use this type of connection, you will
need to set the "Current (
)" measurement type in STEP 7.
In this type of connection, galvanic isolation between the supply voltage L+ and the analog
circuit will be removed.
Equipotential bonding cable (only relevant to modules with M
ANA
connection)
Figure 4-5 Example: Wiring 2-wire transducers to an analog input for 4-wire transducers
Wiring and connecting 4-wire transducers
4-wire transducers provide terminals for connecting a separate supply voltage. They are
powered with an external supply and are frequently called "active transducers". If you use
this type of connection, you will need to set the "Current (
)" measurement
type in STEP 7.
Equipotential bonding cable (only relevant to modules with M
ANA
connection)
Figure 4-6 Example: Wiring 4-wire transducers to an analog input module
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