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  • Welcome to the IS4310 Modbus Chip Wiki
  • Datasheet
    • Presentation
    • Description
      • Function Codes
      • Exception Codes
      • IS4310 Advantages
      • Modbus UART Port
    • Pin Description
    • Memory Description
      • Memory Map Table
      • HOLDx Registers
      • MBADR Register
      • MBBDR Register
      • MBPAR Register
      • MBSTP Register
    • I2C-compatible Bus Description
      • Single Word Read
      • Multiple Word Read
      • Single Word Write
      • Multiple Word Write
  • Hardware Examples
    • RS485 Design Example
    • Isolated RS485 Design Example
    • Bus Topology
    • Cable Wiring
  • Firmware Examples
    • Arduino Example
    • STM32 Reading Example
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  2. Description

Modbus UART Port

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Last updated 20 days ago

The IS4310 is compatible with any Modbus RTU Serial Interface, including RS485, RS422, RS232, and others, thanks to its UART port. A transceiver matching the serial interface of the field bus (RS485, RS422, RS232, etc.) must be connected to the IS4310 UART port. This transceiver adapts the field bus voltage levels to 3.3V or 5V, ensuring proper operation with the IS4310.

Note: Connecting field buses like RS485 or others directly to the IS4310 will not work and will permanently damage the device.

For example, if the customer application connects to an RS485 field bus, an RS485 transceiver such as the THVD1330 should be used.