Vers. No. 6.1
86 Released: 25/04/2017
4 Connecting the modules → Q.bloxx A124: Connecting sensors
Further information on transducers and sensors can also be
found in Chapter 6 ff. page 135.
4.20.1 Voltage
You can measure voltage differences of up to ±80 mV. The volt-
age level (the potential) may be up to 1200 V
DC
.
Voltage differences which exceed the admissible limits produce
incorrect measurement data, because the inputs are protected
against overvoltages and limit the input voltage.
Fig. 4-83 A124, voltage measurement.
4.20.2 Thermocouple
Thermocouples can be connected directly; the comparative mea-
suring point (cold junction compensation
) is integrated in the
module plug. You can connect the following types of thermocou-
ple: B, E, J, K, L, N, R, S, T and U.
Alternatively, you can also use two ther
mocouples or a reference
temperature source.
You will find information on the comparative measuring point and
on the measurement with a reference temperature source in
Section 6.6, Measuring with thermocouples, page 148.
Fig. 4-84 A124, measurement with a thermocouple.
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