Analog Input Wiring

Analog Inputs are used to measure signals that continuously vary. Analog Inputs divided into Temperature Inputs (An Temp) and Analog Voltage Inputs (An Volt). The primary difference between An Temp and An Volt channels is that An Temp inputs have an internal pull-up resistor fitted that makes them only suitable for use with thermistor type (NTC or PTC) temperature sensors.

Some An Temp inputs have a configurable pull-up value, typically 1kOhm, 10kOhm or no internal pull-up but these inputs are still restricted to temperature readings only.

External pull-up resistors can be fitted to An Volt inputs to make them suitable for reading temperature sensors (measuring resistance).

Both An Temp and An Volt inputs are capable of measuring signals over a 0-5V range, signal voltages outside that range will not damage the inputs but will not be measured.