Universal use of various temperature sensors
TM 220/A, TM 240/A
Analog input modules TM 220/A and TM 240/A enable the direct connection of thermoelements (2-conductor technique). The calibration and linearization of the temperature values takes place via a microcontroller. A sensor failure, should it occur, is reported to the higher-level central module and can be evaluated in the application.
Analog input module TM 225/A enables the direct connection of PT100 resistor sensors. Up to four temperature sensors can be operated with 2- or 4-conductor technique. With the 4-conductor technique, the interference associated with the conductor lengths is compensated for and the precision of the measurement thereby increased.