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Industrial Protocols

IS4310 I2C Modbus RTU slave chip
IS4310 I2C Modbus RTU slave chip diagram
IS4310 I2C Modbus RTU slave chip memory map
IS4310 I2C Modbus RTU slave chip memory map
IS4310 I2C Modbus RTU slave chip flyer
IS4310 datasheet front page
IS4310 I2C Modbus RTU slave chip
IS4310 I2C Modbus RTU slave chip RS232 schematic
IS4310 I2C Modbus RTU slave chip isolated RS485 schematic
IS4310 I2C Modbus RTU slave chip RS485 schematic

I2C Modbus RTU Slave Chip – IS4310

Price range: $1.95 through $3.00

The IS4310 chip is a Modbus RTU Slave chip with up to 500 holding registers available for your project. It connects to your microcontroller via I2C. No libraries needed. Ideal for sensors, actuators, or mixed setups.
SKU: IS4310-S8
Select options This product has multiple variants. The options may be chosen on the product page
IS4350 Modbus TCP/IP server chip
IS4350 Modbus TCP/IP server chip general diagram
IS4350 Modbus TCP/IP server chip

Modbus TCP/IP Server Chip – IS4350

$6.83

The IS4350 is a Modbus TCP/IP server chip with I2C interface. Your microcontroller reads and writes its 65,500 Holding Registers with standard I2C commands: no TCP/IP stack or Modbus library required. Connects to Ethernet through an external LAN8742A PHY. Ideal for Modbus TCP/IP sensors, actuators and remote I/O.
SKU: IS4350-L64
IS4320 I2C Modbus RTU master chip
IS4320 I2C Modbus RTU master chip diagram
IS4320 I2C Modbus RTU master chip pinout
IS4320 I2C Modbus RTU master chip memory map
IS4320 I2C Modbus RTU master chip internal blocks
IS4320 I2C Modbus RTU master chip bus topology
IS4320 I2C Modbus RTU master chip cable routing
IS4320 I2C Modbus RTU master chip RS485 schematic
IS4320 I2C Modbus RTU master chip

I2C Modbus RTU Master Chip – IS4320

Price range: $1.95 through $3.00

The IS4320 is a chip with an integrated Modbus RTU Master stack. Your microcontroller communicates through I2C, while the chip manages frame generation, timing, and CRC. It supports Function Codes 1, 2, 3, 4, 15, and 16, making integration straightforward and significantly reducing development time.
SKU: IS4320-S8
Select options This product has multiple variants. The options may be chosen on the product page
IS4350-M1 I2C Modbus TCP/IP server module with RJ45 connector
IS4350-M1 I2C Modbus TCP/IP server module with RJ45 connector
IS4350-M1 I2C Modbus TCP/IP server module with RJ45 connector

I2C Modbus TCP/IP Server Module with RJ45 connector – IS4350-M1

$25.00

The IS4350-M1 is a Modbus TCP server module with RJ45 connector. It turns any microcontroller with an I2C port into a Modbus TCP/IP server with 65,500 Holding Registers: no TCP/IP stack, Modbus library or Ethernet hardware design required. Ideal for building Modbus TCP sensors, actuators and remote I/O.
SKU: IS4350-M1
Kappa4413USB isolated USB 4-20mA current loop transmitter
Kappa4413USB isolated USB 4-20mA current loop transmitter
Kappa4413USB isolated USB 4-20mA current loop transmitter

Isolated USB 4-20mA Current Loop Transmitter (3-Wire) – Kappa4413USB

$20.00

The Kappa4413USB is an isolated USB 4-20mA transmitter (3-wire) based on the IS4413-M1 module. Generate the loop current from your PC with simple text commands through a virtual COM port, without writing any firmware. Ideal for evaluating the IS4413-M1, testing PLC analog inputs and simulating sensors.
SKU: Kappa4413USB
USB dongle for Modbus RTU
USB dongle for Modbus RTU

USB Dongle for Modbus RTU

$25.00

USB to RS485 cable with the standard Modbus RTU pinout on its RJ45 connector. Its FTDI chip appears as a standard COM port, usually without installing drivers. Ideal for using your PC as a Modbus RTU Master or Slave and for testing our Modbus RTU boards and modules.
SKU: ISUSBMBRTU
IS4310-M3 Modbus RTU slave module
IS4310-M3 Modbus RTU slave module, bottom view
IS4310-M3 Modbus RTU slave module, top view

Modbus RTU Slave Module – IS4310-M3

$4.80

The IS4310-485M3 is a compact Modbus RS485 module with an integrated IS4310 RTU Slave chip. It includes an RS485 transceiver, dual RJ45 connectors, and 500 Holding Registers accessible via I2C. Ideal for fast integration, it simplifies Modbus communication by eliminating the need for protocol stack implementation.
SKU: IS4310-485M3

Isolated RS485 Modbus RTU Slave Module: IS4310-ISO485M1

$4.80

The IS4310-ISO485M1 is an isolated RS485 Modbus RTU slave module built around the IS4310 chip. Your microcontroller, Arduino or Raspberry Pi simply reads and writes 500 Holding Registers over I2C, while the module handles the Modbus RTU protocol on a galvanically isolated RS485 bus with two daisy-chained RJ45 connectors. Ideal for harsh environments and long cable runs.
SKU: IS4310-ISO485M1

RS232 Modbus RTU Slave Module: IS4310-232M5

$4.54

The IS4310-232M5 is a compact RS232 Modbus RTU Slave module with the IS4310 chip. It includes an RS232 transceiver, a DB9 connector, and 500 Holding Registers accessible via I2C. Ideal for adding a Modbus RS232 port to sensors, actuators and controllers without implementing a protocol stack.
SKU: IS4310-232M5
Kappa4310Ard IS4310 demoboard for Arduino
Kappa4310Ard IS4310 demoboard for Arduino
Kappa4310Ard IS4310 demoboard for Arduino
Kappa4310Ard IS4310 demoboard for Arduino

Kappa4310Ard: IS4310 Demoboard for Arduino

$15.00

The Kappa4310Ard is a plug-and-play evaluation board for the IS4310 Modbus RTU chip. It features an RS485 interface, dual RJ45 connectors, 500 Holding Registers, and built-in RGB LED and potentiometer for quick testing. Compatible with Arduino and STM32 Nucleo, it's ideal for rapid Modbus prototyping without the need for custom hardware.
SKU: Kappa4310Ard

Streamline Development with Dedicated Industrial Protocol Chips

Industrial automation relies heavily on robust and standardized communication networks to ensure seamless data exchange between sensors, actuators, and control systems. However, implementing complex protocols such as Modbus RTU, Modbus TCP/IP, or analog 4-20mA current loops directly into a microcontroller’s firmware is often a time-consuming and error-prone process. It requires deep knowledge of timing constraints, error handling, and strict compliance with industrial standards.

This category features a comprehensive range of industrial communication protocol chips designed to bridge this gap. These specialized integrated circuits and modules act as hardware accelerators, managing the entire communication stack independently. By offloading these demanding tasks from the main microcontroller, developers can ensure reliable, deterministic performance without burdening their system’s resources. Whether you are designing for factory automation, energy management, or remote monitoring, these chips provide a certified and robust foundation for your connectivity needs.

Reduce Costs and Accelerate Time-to-Market

Integrating INACKS integrated circuits and modules helps a lot to develop products within this category because it significantly simplifies the engineering process. Instead of spending weeks writing and debugging proprietary protocol stacks, the firmware engineer can interface with these chips using simple standard connections like I2C or UART.

This hardware-based approach avoids the firmware engineer having to implement the protocol by themselves, ensuring that the device is compliant from day one. Consequently, there are less costs associated with development and testing, and the final product can be ended sooner. By using a dedicated communication chip, you eliminate the risk of protocol non-compliance and can focus valuable engineering time on the core application logic rather than connectivity maintenance.

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Industrial Protocols | Lighting Protocols | Image/Video | Storage | USB Peripheral | IoT Protocols | Utility Meter