Modbus Rtu Cable Type

The protocol interconnects field equipment such as sensors.

Modbus rtu cable type.

With its open and simple specifications the modbus protocol is widely used to control device communications in industrial applications. For example belden 3105a cable can be specified but different types of cable with equivalent characteristics can be used. Type of cables to use. 30 m in electrically quiet environments the type of cable used is usually not a concern but when you need to run long distances in noisy environments at higher baud rates the type of.

Type of cable to use. Modbus has been a standard for interfacing remote i o and plcs into the process dlc system for over 20 years allowing most legacy control systems to interface easily with modbus. Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices. In modbus protocol one master communication with many devices approx 240 device.

For modbus communications a shielded and twisted pair cable is used. Modbus protocol is a messaging structure developed by modicon in 1979 used to establish client server communication between intelligent devices. Here describe a difference between modbus ascii vs modbus rtu vs modbus tcp ip below. Modbus rtu is an open serial rs 232 or rs 485 protocol based on master slave or client server architecture.

The cable to be used is a shielded twisted pair telephone type. One example of such cable is belden 3105a. The wattnode bacnet and modbus meters communicate using rs 485 tia eia 485 a half duplex differential signaling at 9600 19200 38400 and 76 800 baud. Modbus is a data communications protocol originally published by modicon now schneider electric in 1979 for use with its programmable logic controllers plcs.

Over short distances 100 ft. The 3 most common modbus type used today. As indicated in the following table modbus modes and functions differ depending on cable type. 1 modbus ascii 2 modbus rtu based on serial communication like rs485 rs422 rs232 3 modbus tcp ip based on ethernet.

Go back to modbus rs485 cabling rules 5. Modbus cable interface quickly and easily with most existing plant control architectures by using belden cabling for modbus.