Inputs Analog Input Sensors Temperature Sensors Flow sensors Humidity sensors Potentiometers Pressure Sensors Tank Levels Load Calls Light Sensors Speed and position sensors PT100 Inputs Using the extension module It can be connected with one two-wire or three-wire Resistance Temperature Detector (RTD) PT100. The RTD sensor is comprised of a resistor that changes value with Using a two-wire connection the unit can not compensate error/ temperature. The most common RTD by far is the PT100 385. This tolerance caused by the resistance in measurement loop. The measurement error of 1Ω is equivalent to an error of 2.5 °C.
The element measures 100 Ohms @ 0 degrees C (32 °F) and 138.5 three-wire technology can inhibit the influence of measurement Ohms @ 100 °C (212.0 °F). The temperature range for a PT100 inputs is within -50 to 300 °C (resolution 0.3 °C). results caused by cable length (ohmic resistance). Two-wire connection MIRCO PLC PT100 Inputs MIRCO PLC PT100 Inputs Three-wire connection Compensator Input “+” ADC A RTD PT100 Input “-” A - Amplifier; ADC - Analog-to-Digital Converter A - Amplifier; ADC - Analog-to-Digital Converter 7 Compensator Input “+” RTD PT100 Input “-” A ADC