How to use a PT100/RTD

Only applicable for NEON Temperature Transmitters using protocol v3 and v4

Connecting the PT100/RTD

3-wire PT100/RTD

The RTD wire must be connected to the temperature interface as illustrated in the following image:

The pinout of the interface when using an RTD is the following one:

Pin	Connection
Pin 1	RTD sense (red)
Pin 2	RTD + (red)
Pin 3	RTD - (white)
Pin 4	Not used

2-wire PT100/RTD

The RTD wire must be connected to the temperature interface as illustrated in the following image:

The pinout of the interface when using an RTD is the following one:

Pin	Connection
Pin 1	RTD + (red)
Pin 2	Not used
Pin 3	RTD - (white)
Pin 4	Not used

Configuring the device

The NEON Temperature Transmitter is configured by default to use a type K thermocouple. Using a PT100 is possible by changing the configuration of the transmitter once provisioned. The configuration can be changed by generating a downlink using the NEON configurator and sending the downlink using the LoRa Network Server (LNS).

Protocol v3

In the Application Configuration tab, in the field Sensor Type change the selection to the desired temperature element.

Example of Sensor Type being changed

Click Encode and send the downlink to the device through fPort 15. The device will reboot once the downlink is received changing its configuration.

Protocol v4

In the Sensor tab, in the field Sensor Type change the selection to the desired temperature element.

Example of Sensor Type being changed

Click Encode and send the downlink to the device through fPort 7. The device will reboot once the downlink is received changing its configuration.