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1.3.2.1.3.4.2.2.1 How to connect a temperature sensor
There is no particular input for temperature sensors in Node. Four analog inputs are available. Any of these
can be used to measure the temperature sensor resistance. But the single-ended (AI 1, AI 2) is more accurate
than the differential inputs (AI 3, AI 4) because the voltage difference is less. A simple circuit with an extra
resistor for voltage dividing has to be implemented externally. For details about using temperature sensors
please
check our System integration guide
.
1.3.2.1.3.4.3 Attaching a voltage divider
A voltage divider is needed when the Analog In needs to be calibrated. This is required for adjusting the
measuring range when using a temperature sensor.
The image below depicts how to connect an RTD sensor resistance using the single-ended analog input.
Attention
The ADC value is scaled to 16 bit since firmware v5.0.
Firmware v4.x
Synapticon Documentation
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