Principles of analog value processing
4.4 Wiring and connecting current transducers
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
245
4.4 Wiring and connecting current transducers
Introduction
This chapter describes the wiring and connecting of current transducers and rules to be
observed.
Supported current transducers
● As 2-wire transducer
● As 4-wire transducer
Wiring and connecting 2-wire transducers with power supply from the module
The 2-wire transducer is wired to the short circuit-proof supply voltage at the terminals of the
analog input module.
The 2-wire transducer converts the process variable into a current. 2-wire transducers must
be electrically isolated.
Figure 4-6 Wiring and connecting 2-wire transducers to electrically isolated AI
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