Modbus Rtu Cable

1200 m or more are possible.

Modbus rtu cable.

From power limited tray cable pltc and plenum cmp rated cable to low smoke zero halogen cable you get the ideal solution for your automation network. Modbus is a data communications protocol originally published by modicon now schneider electric in 1979 for use with its programmable logic controllers plcs. Cable termination rs485 modbus rtu line line bias when the rs485 network is not being actively driven by a device the differential pair is more susceptible to interference and noise. In environments where excessive interference.

Modbus tcp ip is simply the modbus rtu protocol with a tcp interface that runs on ethernet. Modbus is popular in industrial environments because it is openly published and royalty free. Of slaves also depend on the data logger specification. So if you desire data fast and you want to come into the 21st century then modbus tcp ip is the way.

In order to avoid signal reflections a 120 ohm termination resistance must be fitted on each end of. Maximum length is 100 m 328 ft. The cable shield must be earthed only in one point. The atv212 drive includes a line termination as standard.

Modbus cable interface quickly and easily with most existing plant control architectures by using belden cabling for modbus. Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices. Modbus serial link connection is carried out using rs 485 double shielded twisted pair cables supplied without connector reference. Go back to modbus rs485 cabling rules 8.

Correct termination of the shield drain to a dedicated ground terminal or chassis should provide noise rejection. Set switch sw103 to term to connect the internal 120 ω termination resistor. 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. However the cable recommended for long lengths can be expensive so if there is an existing ethernet infrastructure in place it may be more affordable to convert from bacnet ms tp or modbus rtu over rs 485 to bacnet tcp ip or modbus tcp ip over ethernet.

Under ideal conditions cable lengths of 4000 ft.