Connecting Current Transducers - Siemens SIMATIC S7-300 Manual

Priniples of analog value processing

4.4 Connecting current transducers

4.4 Connecting current transducers
4.4
Introduction
This chapter contains a description of wiring current transducers and points to which
particular attention must be paid.
Current transducers which can be wired up
● As 2-wire transducer
● As 4-wire transducer
Wire 2-wire transducer with supply via module
The 2-wire transducer is wired to a short circuit-proof supply voltage at the terminals of the
analog input module.
This transducer converts the measured variable into a current. 2-wire transducers must be
electrically isolated.
Figure 4-6
4-8
Wire 2-wire transducers to electrically isolated AI
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04