Pt100 Temperature Sensors - ABB LWT300 Series User Manual

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A p p E N D I X E

PT100 temperature sensors

The temperature sensor circuit (PT100) must be connected in accordance with the requirements of the
CSA certificate. The temperature sensor circuit (PT100) and the digital output (pulse/limit value output)
must be connected in accordance with the requirements of the Ex certificate.
A metal cable gland or conduit should always be used for the PT100 cable since a shielded cable is used.
Connect the shielding within the metal cable gland.
To offer IP rating 4X/6P or IP 66/68, cable glands/sealing plugs must be screwed in using a suitable
sealing compound.
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Figure 59 Pt100 terminals
A(+)
B(-)
QR
code
1
NOTICE – CONNECTION OF A PT100 TEMPER ATURE SENSOR
You can simulate an external temperature by using a 100-ohm resistor [equivalent to 0 °C
(32 °F)] with two jumpers installed between the terminals for the Pt100 connection.
This resistor (including the jumpers in the case of 4-wire connections) must be removed
before connecting the Pt100.
If neither a Pt100 nor the resistor is connected, LevelMaster emulation registers will have
a –73 °C (–100 °F) value and an error status for the external temperature sensor. The map
register offset in this Appendix is Base 0 (first register address is at 0).
+
COMM.
PWR
USE WIRING RATED
5 °C MIN. ABOVE MAX.
AMBIENT TEMPERATURE
SURGE
P/N :3KQZ207165U0400
INSIDE
RTD
2 3 4
Pt100 temperature
sensor terminals