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So when the CT 24 is used with a voltage output, 2 input
and 4 output wires have to be connected plus two times
the shielding of both cables.
Of course any other R
L
output current to a voltage, as long as the guideline from
chapter 5 is followed. (E.g. RL= 50 Ω to make an output
voltage range of 0.2 to 1 V ).
If the resistor is placed at the end of the current loop
(near the power supply), only two wires are necessary.
The power supply but also the loop
"indicator" or passive receiver should be
floating from ground to give highest freedom
of connection or configuration.
With a voltage output connection it is most advantageous
to use a power supply and read out equipment both
floating from ground.
Only in that case the shield of the input cable or the
sensor housing (and not more) can be grounded at the
sensor side.
Connect only input cable shield and output cable shield
together, if you have to ground at the data logger side.
The CT 24 will oscillate probably, but connecting the
signal+ of the data logger to the same ground will stop
this. This is of course only possible with floating data
logger and floating power supply of course.
(At principle a shielded output cable is no must and the
input cable shield can also be carried on to the data
logger by a single wire).
18
CONNECTION OF THE CT24
can be used to transform the
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