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1MRS750527-MUM

Feeder Terminal

Technical Reference Manual, General

REF 54_

Current transducers

When a current transducer is connected to the RTD/analog input, the SHUNT and

IN+ terminals are linked together as are the GND and IN- terminals. The incoming

current signal is connected to the IN+ terminal and the outgoing current signal to the

IN- terminal.

currtran_b

Fig. 5.1.9.6.-2 Principle diagram for the connection of current transducers

Voltage transducers

When a voltage transducer is connected to the RTD/analog input, the GND and IN-

terminals are linked together. The incoming voltage signal is connected to the IN+

terminal and the return voltage signal lead to the IN- terminal.

volttran_b

Fig. 5.1.9.6.-3 Principle diagram for the connection of voltage transducers

*) The GND terminals are galvanically isolated from the supply and enclosure of the

feeder terminal, but they are all connected to each other, that is, they share the same

potential. When several inputs are connected to single-ended signal sources that

share a common ground, ground loops result if the connection GND <-> IN- is done

on every input. In this situation, the connection GND <-> IN- is done on only one of

the concerned RTD/analog inputs.

SHUNT

IN -

GND

IN +

DIFF

Transducer

amplifier

Sensor