Mitsubishi Electric smart Remote Terminal Units (smart RTUs) are intelligent remote terminals which can supply data to the enterprise system over long distances from diverse plant systems such as oil and gas pipelines, switching stations, tunnels or sewage treatment plants.

This innovative solution enables a fully automated production process to be controlled and monitored remotely, and allows the number of personnel employed on site to be reduced to a minimum or even zero. The smart RTU utilises tested and industrially hardened control and I/O modules, making them robust and well suited for use in extreme temperature conditions.  They support GPRS, EDGE, Ethernet, radio modem or satellite modem communications for transferring data.

Oil, gas, power and water applications

A new intelligent add-on data transfer module looks after the whole complex process of protocol handling.  As a result, all system engineers have to do is create the monitoring and control logic required in the built-in IEC-61131 PLC programming language. An expanding library of protocols and pre-configured function blocks required for the relevant industry such as protocol standards for the water and waste water, infrastructure, oil and gas industries or the communication standards DNP3, IEC 60870-5 and IEC 61850 for the energy industry is being developed on an ongoing basis.

The flexibility if the smart RTU is enhanced when paired with Mitsubishi’s ultra-compact FX3UC PLC.  FX3UC PLC start at 16 I/O with 8 digital inputs and 8 transistor outputs but is 70% smaller than a comparable FX3U PLC but retains the same features and performance: memory for up to 64 k of PLC program steps; up to 96 directly connected I/O; up to 384 I/Os by adding expansion modules and networked I/O points.  Like the FX3UC the 24V dc supply and low power consumption mean smart RTUs are suitable for use with a photo-voltaic system or wind turbine.

Secure communication

Information sent over the Internet uses Secure Socket Layer (SSL) technology to provide protection for essential infrastructure data against potential attacks from hackers and cyber terrorism.  SSL is a  cryptographic protocol creates a secure connection between a client and a server, over which any amount of data can be sent securely.

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