LOOP CONFIGURATION TOOL (LCT)
The Loop Configuration Tool model LCT is a configuration adapter
for ExTemp infrared temperature sensors.
It is designed to be connected to the 4 to 20 mA current loop on
the safe side of an Intrinsically Safe isolator, and to a Windows PC
via USB.
This manual describes how to connect the LCT and use it to
configure the sensor. For information on connecting and using
the sensor itself, please refer to the previous sections of this
manual.
WARNING
This device MUST NOT be used in hazardous areas. It is not certified for use in
explosive atmospheres and may only be connected on the safe side of a
suitable, certified Intrinsically Safe isolator.
Do not attempt to repair a faulty unit. Contact the vendor to arrange a return.
ELECTRICAL CONNECTION
Connect the device to the 4 to 20 mA measurement loop via the hook-type connectors. For
reliable communications, the total resistance R
L
on the 4 to 20 mA loop should be within the
range specified on the connection diagrams. You may need to connect a resistor in series with
the existing measurement instrumentation on the 4 to 20 mA loop to ensure this.
WIRE IDENTIFICATION - LCT
The LCT connectors are colour coded as follows:
Colour of Wire and Hook Connector
Polarity
Red
+
Black
-
Measurement
instrumentation
LCT
PC with
software
Power supply
Hazardous Area
(All Zones IIC and IIIC)
Safe Area (Non-
Hazardous)
Intrinsically Safe
isolator
To the sensor
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