Arduino Opta® Analog Expansion

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Arduino Opta® Analog Expansion

Modified: 15/11/2024

2.2.3 RTD Input Mode

The Analog Expansion input channels can be used for temperature metering with PT100 RTDs.

Characteristics

Details

Input range

0...1 MΩ

Bias voltage

2.5 V

2 wires RTDs can be connected to any of the eight channels.

3 Wires RTD Connection

RTD with 3 wires has generally two wires with the same color.

Connect the two wires with the same color to the - and the ICx screw terminals respectively.

Connect the wire with a different color to the + screw terminal.

3 wires RTD can only be measured by channels I1 and I2.

3 Wires RTD connection example