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Automated production lines still require a well-organised hierarchy of controller systems to function efficiently. While Ethernet-based networks are becoming increasingly popular, Fieldbus networks continue to play a crucial role on the plant floor.
Industrial Fieldbus systems are primarily used to connect and control a network of field devices in real time within a manufacturing plant. These devices include sensors, actuators, motors, switches, drives, and field controllers. Unlike traditional wiring, Fieldbus requires only a single communication point at the controller level, enabling hundreds of analogue and digital connections simultaneously. This significantly reduces both the length and volume of cabling required.
However, an effective Fieldbus network depends on a well-structured hierarchy of cables that work together to transmit data efficiently across different levels of information and priority. UNITRONIC BUS cables from LAPP provide high transmission rates and seamless data flow, ensuring smooth and reliable communication across the network.
PROFIBUS
PROFIBUS is a standard fieldbus communication protocol for automation technology, first developed in 1989 by the German Federal Ministry of Education and Research (BMBF) before being widely adopted by Siemens.
It supports fieldbus solutions across factory automation, process automation, motion control, and safety-related applications. The two main variants are PROFIBUS DP and PROFIBUS PA. DP is the dominant variant globally, offering bit rates from 1.5 Mbit/s up to 12 Mbit/s, while PA is the preferred choice for process automation in Europe.
DeviceNET
DeviceNet is a low-level industrial application layer protocol, originally developed by Allen-Bradley and now widely used by Rockwell Automation.
Built on the standard Controller Area Network (CAN) physical communication standard, DeviceNet leverages CAN hardware to define an application layer protocol. This structures the process of configuring, accessing, and controlling industrial automation devices efficiently.
AS-Interface
The Actuator Sensor-Interface (ASi) is an open technology originally developed by a consortium of 11 companies specialising in non-contact sensing devices.
ASi serves as a partner network for higher-level fieldbus systems such as PROFIBUS and DeviceNet. It can also be used to create a cost-effective remote I/O solution, requiring only a single two-conductor cable for communication and power.
CANopen
CANopen is a message-based protocol and device profile specification built on the CAN protocol, designed for embedded networking applications.
It serves as the application layer for many small and medium-sized suppliers and is unique in being the only independent industrial communication system not promoted by a single market-leading company. CANopen is also favoured by system designers, as it allows machine builders to remain independent from specific suppliers.
Wide Application Range
In telecommunications and both low- and high-frequency technology, traditional signals have been transmitted and received for many years. In office buildings, data must also be routed between floors via cabling, as wireless transmission alone is not universally reliable.
In industrial communication, modern miniature devices must not only store data but also transmit and receive it rapidly over long distances. This is achieved using data packets, with an almost unlimited number of network participants.
As a result, the application of data cables spans conventional communication technology, building infrastructure, factory automation, and process automation.
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