Modbus Rtu Cable Type

Over short distances 100 ft.

Modbus rtu cable type.

In modbus protocol one master communication with many devices approx 240 device. Go back to modbus rs485 cabling rules 5. As indicated in the following table modbus modes and functions differ depending on cable type. Modbus is popular in industrial environments because it is openly published and royalty free.

One example of such cable is belden 3105a. Modbus cable interface quickly and easily with most existing plant control architectures by using belden cabling for modbus. Modbus is a data communications protocol originally published by modicon now schneider electric in 1979 for use with its programmable logic controllers plcs. 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 protocol is a messaging structure developed by modicon in 1979 used to establish client server communication between intelligent devices. The protocol interconnects field equipment such as sensors. The 3 most common modbus type used today. Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices.

Type of cable to use. With its open and simple specifications the modbus protocol is widely used to control device communications in industrial applications. Here describe a difference between modbus ascii vs modbus rtu vs modbus tcp ip below. The cable to be used is a shielded twisted pair telephone type.

Modbus rtu is an open serial rs 232 or rs 485 protocol based on master slave or client server architecture. 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. 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.

But any cable with similar characteristics can be used to connect all the devices together. For modbus communications a shielded and twisted pair cable is used.