Selecting The Supply Voltage; Connection For Current Output - Kipp & Zonen CT24 Instruction Manual

3.2

Selecting the supply voltage

The CT 24 operates as a so-called 2 wire current transmitter. This
means that the amplifier receives its operating current from the
loop that represents the current output signal.
The loop has to be powered with a power supply capable of
providing a voltage between 12 and 30 Volt @ 125 Ohm. When
later on the current is to be transformed to a voltage, it is important
to select the power supply voltage in accordance with the desired
output voltage.
Example:
Required voltage over the CT 24 is 9 Volt (minimum value)
Required voltage over the 500 Ohm resistor is 10 Volt (@ 20 mA)
This implies that the supplied voltage has to be at least
9+10 = 19 Volt.
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.
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.
INSTRUCTION MANUAL CT 24
CONNECTION OF THE CT 24 CONNECTION OF THE CT 24
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