Simply, it’s an Arduino library for communicating with Modbus slaves over RS232/485 via RTU (remote terminal unit) protocol. In conclusion, the Modbus 2-channel 5V relay module is a very useful device ...

The system offers many of the perks of PLC programming alongside the familiar Arduino platform, and supports a number of protocols as well including CANOpen, Modbus RTU, and Modbus TCP.

The MGate MB3170 and MB3270 are 1- and 2-port Modbus gateways that convert between Modbus TCP, ASCII and RTU communication protocols. Listen to the Automation World Gets Your Questions Answered ...