Vers. No. 1.054 Released: 2/12/20114 Connection → Q.brixx A124: Connecting sensors4.14.1 VoltageYou can measure voltage differences of up to ±80 mV. The volt-age level (the potential) may be up to 1200 VDC.IMPORTANTVoltage differences which exceed the admissible limits produceincorrect measurement data, because the inputs are protectedagainst overvoltages and limit the input voltage.Fig. 4-58 A124, voltage measurement.4.14.2 ThermocoupleThermocouples can be connected directly; the comparative mea-suring point (cold junction compensation) is integrated in themodule 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 thermocouples or a referencetemperature source.TipYou will find information on the comparative measuring point andon the measurement with a reference temperature source inSection 6.5, Measuring with thermocouples, Page 102.Fig. 4-59 A124, measurement with a thermocouple.UA In+AIn –A In –AIn +
