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Electrical connection
KTX or KTX125 Level Transmitters must only be operated when connected to an
certified intrinsically safe control circuit of ignition protection type:
KTX125...:
KTX...:
The electrical data on the type plate and the additional regulations governing intrinsically safe
circuits must be complied with. This work must be done by trained specialist personnel.
The electrical connection of
the
KTX125...
Level Transmitters is realised
with integrated terminals. See
the
connection
diagram
terminal box
for example:
Figure 1 – Level Transmitters without
head-mounted transmitter.
Figure 2 – Level Transmitters with head-
mounted transmitter.
Calibration
On the KTX125 or KTX Transmitters, no re calibration is required. In the case of an installed head
mounted transmitter, this transmitter has already been adjusted at the factory to the reed
measuring chain. Additional adjustments are usually not required.
Selecting the connection cable
The connection cable must be selected as suitable for the expected ambient
conditions (temperature, aggressive atmosphere, weathering, etc.). The connection
cables shall be identified to prevent confusion with non-intrinsically safe circuits. Where a colour is
used it shall be light blue. The diameter of the connection cable must be within the clamp range of
the cable gland. If other cable diameters are used, moisture may penetrate into the equipment.
Use of single bunched conductors is not permissible!
Cable capacitance and inductance
Ensure that the total cable inductance and or capacitance do not exceed the values as
stated on the intrinsically safe control device .
07.05.2014
Ex ia
Ex ia or Ex ib
or
KTX...
Figure 1
inside
the
blue
brown
black
Internal circuuit diagram
Rev. 8
Figure 2
top
100%
I
-
A
botton
12 - 30V DC
0%
EEx ia / EEx ib
6 / 30
R
+
4 - 20mA
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