NORVI X-UARTIO | DATASHEET

The NORVI X-UARTIO is a versatile communication expansion module for the NORVI X modular controller platform. It provides multiple serial communication interfaces including RS485, RS232, and UART, enabling flexible connectivity to industrial devices, sensors, meters, and peripherals.

The module uses shared MCU I/O lines with intelligent switching, allowing multiple physical ports to be supported while minimizing processor pin usage. Interface selection is fully controlled via firmware.

Product Features #

• 2 × RS485 communication ports
• 2 × RS232 communication ports
• 4 × UART ports (multiplexed)
• Industrial-grade RS485 and RS232 transceivers
• Flexible I/O routing via GPIO- and CS-controlled switching
• UART pins usable as GPIO when not configured for UART
• Designed for NORVI X expansion architecture

System Architecture #

• RS485: Half-duplex differential communication
• RS232: Full-duplex serial communication
• UART (TTL level): Direct MCU UART / GPIO connectivity

Applications #

• Industrial automation and control systems
• Modbus RTU and serial fieldbus communication
• Sensor and meter integration
• Legacy device connectivity via RS232
• Multi-device UART expansion
• OEM and system integrator solutions

Product Block Diagram #

Main #

Complementary #

Mechanical Properties #

Environment #

Electrical Characteristics #

Grid Powered Devices #

I/O Specifications #

System Architecture Overview #

The NORVI X-UARTIO expansion uses shared MCU RX/TX lines that are routed to different physical connectors using onboard switching logic. Only one channel per interface group can be active at a time.

Interface groups:

• RS485 Group → RS485-1 or RS485-2
• RS232 Group → RS232-1 or RS232-2
• UART A Group → UART-1 or UART-2
• UART B Group → UART-3 or UART-4

Terminal Configuration #

GPIO Utilization #

RS485 Interface

• RX: IO5
• TX: IO11
• Channel Select: P1_3 – Expanded IO from CPU
• Active Channel: RS485-1 or RS485-2

Only one RS485 channel can be active at a time.

RS232 Interface

• RX: IO6
• TX: IO12
• Channel Select: CS3
• Active Channel: RS232-1 or RS232-2

Only one RS232 channel can be active at a time.

UART A (UART-1 / UART-2)

• RX: IO7
• TX: IO13
• Channel Select: P1_4 – Expanded IO from CPU – Refer CPU Datasheet

UART A pins can also be configured as GPIO

UART B (UART-3 / UART-4)

• RX: IO10
• TX: IO14
• Channel Select: CS2

UART B pins can also be configured as GPIO.

Expansion Port #

Utilized GPIO Connections are highlighted in Yellow. They cannot be used for any other purpose with this module connected.