USER MANUAL 1.2 | B-FORTIS CC-SLIM SERIES
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Temperature measurement AI (T)
Fig. 19: Connection example: temperature measurement
No.
Description
1
PT 100 with 2-wire connection
2
PT 100 with 3-wire connection
Only use the corresponding AGND for each input.
Do not connect AGNDs from different channels.
Do not connect to the common GND. The required connections can already be found on the cir-
cuit board.
Cables to the PT100(0) sensors should be connected as directly as possible and without detours
(avoid the use of terminals and terminal blocks).
Only connect PT100(0) sensors to AI (U/T) channels.
2-wire measurement
Resistance can result in a measurement error, which in the case of long cables with a small cross-sec-
tion can be up to 10°. If the temperature of the sensor is known, this deviation can be subtracted and
compensated through the software (alternatively, use 3-wire measurement).
3-wire measurement
The nearest AI (U) connection is used to compensate the resistance in the cable. It can only be used
directly in conjunction with the following AI (U/T) channel. Channels 1 and 2, and also channels 3 and 4
each form a pair for 3-wire measurement.
