Liquidew I.S. User Manual
20
97092 Issue 5.3, September 2021
INSTALLATION
2.4.2.2 Sensor Signal Input Connection
HAZARDOUS AREA INFORMATION
Cables from transmitters mounted in hazardous areas can be
connected directly to the
SENSOR INPUTS
connector block.
There are built-in Galvanic I.S. barriers for all connections
made to this connector block.
Refer to ATEX/
QPS
/IECEx certificates for the dew-point and
temperature transmitters’ connection cable requirements
which stipulate maximum permissible mutual capacitance and
inductance to resistance ratio.
All wiring procedures should be in accordance with local
electrical codes.
Two input ports are provided for signals from the dew-point transmitter and the
temperature transmitter respectively. They are connected via a single 6-way push fit
connector block labelled
SENSOR INPUTS
as shown below.
Figure 12
SENSOR INPUTS Connector Block
The method of connection is as follows:
a. Remove the terminal block from the
SENSOR INPUTS
socket.
b.
Strip back the wires of the dew-point transmitter signal cable, exposing
approximately 6mm (0.2”)-the use of crimps/wire ferrules is recommended.
c.
Insert the +4...20 mA lead into the
Dew Point
+V
terminal way on the
terminal block and tighten the screw.
d.
Insert the –4...20 mA lead into
Dew Point
mA
terminal way on the
terminal block and tighten the screw.
e.
Strip back the wires of the temperature transmitter signal cable,
exposing approximately 6mm (0.2”) - the use of crimps/wire ferrules is
recommended.
f.
Insert the +4...20 mA lead into the
Temp./Press
.
+V
terminal way on
the terminal block and tighten the screw.
g.
Insert the –4...20 mA lead into the
Temp./Press
.
mA
terminal way on
the terminal block and tighten the screw.
h.
Check that the wiring has been completed correctly.
i.
Push the terminal block firmly back into the
SENSOR INPUTS
socket.
