NORVI X-RTD4

The NORVI X-RTD4 is a 4-channel RTD acquisition expansion module designed for the NORVI X modular controller platform.

It enables accurate temperature measurement using 2-wire RTD sensors, with a single MAX31865 RTD-to-digital converter shared across four RTD inputs via an analog multiplexer.

The module is optimized for industrial temperature monitoring applications where multiple RTD sensors are required with minimal hardware complexity.

Product Features

• 4 × RTD temperature input channels
• Supports 2-wire RTD sensors
• High-accuracy MAX31865 RTD reader
• Multiplexed RTD input architecture
• SPI interface via NORVI X expansion bus
• Compact industrial expansion module design

System Architecture

• RTD Reader IC: MAX31865
• Input Selection: Analog multiplexer
• RTD Channels: 4 (selected sequentially via multiplexer)
• Communication: SPI (shared across channels)