Campbell-scientific CURS100 100 Ohm Current Shunt Terminal Input Modul Manuel d'utilisateur télécharger pdf (Page 13)

CURS100 100 Ohm Current Shunt Terminal Input Module

Datalogger Transducer

I

H

L

G

Signal

Power

Battery

–+

Ground

FIGURE 4-5. 3-wire with external power

4.3 Four-Wire Transducers

A four-wire transducer has separate wires for power input and ground and for

signal output and ground. The signal ground may or may not be internally tied

to the power ground. Some transducers have completely isolated outputs.

Datalogger

H

L

G

+12 V

I

Transducer

Signal

Power

Ground

Signal Return

FIGURE 4-6.

4-wire with datalogger power

Datalogger

H

L

G

I

Transducer

Signal

Power

Ground

Signal Return

Battery

–+

FIGURE 4-7. 4-wire with external power

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