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CONNECTION OF THE CT24
3.3
Connection for current output
When the CT 24 is used as a standard 4−20 mA amplifier
(transmitter) only 2 input and 2 output wires have to be
connected plus two times the shielding of both cables.
This configuration is least sensitive to shielding and
grounding problems, because the voltage variations in
the cable leads are relative small.
Grounding and coupling of the shields from input cable
and output cable is often no problem and the power
supply and data logger common may be grounded as
well, preferably all at the same ground.
The cable coming from the sensor is lead through the
cable gland and directly connected to pin 2 (-) and 3 (+)
of the input connector strip.
Check your sensor manual for the colour of the wires.
The outgoing cable has the same number of wires as the
input cable and can be connected to the output strip.
Make sure both cables have their shield connected to
ground.
Input connector pins number 4 till 9 are interconnected
with the output connector pins and can be used to
transfer the signal from temperature sensors like a Pt100
or thermistor to the output cable.
(First remove the 500 Ω resistor from the terminal strip).
15
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