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Analog Input - Temperature Sensor

Metalfor 9 years ago in Master modules / MD4 • updated by Gustav Widén (System support) 4 years ago • 3
Hello I'm new here in the forum and I'm already gathering information to take new designs decisions.
The question is if any of you have used a temperature sensor in the analog input of a MD4-7? Was it PTC or NTC? Because in pdf only talks about connect a PTC sensor with a pull-up resistor. Kind regards. Diego.
Thomas Moberg (System support) 9 years ago
Hello Diego.

The difference between a PTC and NTC sensor is how they behave when the temperature changes.
On a PTC (positive temperature coefficient) the resistance increases with increasing temperature.
On a NTC (negative temperature coefficient) the resistance decreases with increasing temperature.

Metalfor 9 years ago
Hello Thomas. I´ve already know about the signal behavior of resistances with different coefficient. The question is if have you ever used PTC/NTC sensors in the analogic input of a MD4?.
Gustav Widén (System support) 4 years ago

Old post, but see this topic for a discussion on reading 2-wire sensors on VIN using a pull-up

https://forum.iqan.se/en/communities/5/topics/2502-reading-thermistors-on-mc43

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