Fieldbus and Multipoles systems
Description and Advantages of Serial Systems
Components that use a serial communication interface have the advantage of a very simple connection to the control unit (usually a PLC). A single cable, with a reduced number of wires inside, enables the interconnection of a vast network of components spread throughout the plant. The advantage of a serial network is the reduction of setup times, ease of connecting functions, reduction of connection errors, and a significant amount of information that the installed components can transfer.
Serial or Multipole Systems: Which to Choose?
Serial systems facilitate reduced wiring, transmitting all information over a single line where various devices can be installed, such as valve islands, operator panels, and motors, and making them suitable for long-distance communications. A control panel can be installed alongside the PLC since the PLC itself does not require I/O cards and has a reduced footprint. Multipole systems are preferrable when the amount of information or the number of devices to be connected, and the distance of the functions is not significant, generally in small-scale plants and automation applications.
Description and Advantages of Multipole Systems
Multipole systems are an evolution of point-to-point electrical connections. Grouping functions into islands they also allow grouping of the individual connecting cables into a single multi-wire cable, facilitating easier installation and aesthetics.
Future Trends in Serial and Multipole Systems
Technological evolution is leading to an increase in data exchanges to and from machines. This is promoting improved component efficiency, and consequently, increased communication between components and the management part of the system. This combined with the introduction of communication security systems and application flexibility, demonstrates characteristics that are more commonly seen in serial systems.
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