Interbus

The Interbus is a standardized fieldbus used in automation technology. It is an open bus concept that is standardized as an international(IEC 61158), European(EN 50254) and national standard(DIN 19258), is suitable for real-time transmission ofprocess data and supports all PLC systems regardless of manufacturer. The Interbus is the ideal continuation of Ethernet in automation. This also includes the protocol structure and the integration of the TCP/IP protocol and thus the continuity of communication from the sensors and actuators via the Internet. The Interbus works with transmission rates of 125 kbit/s, 500 kbit/s and 2 Mbit/s, whereby up to 254 participants can be connected as so-called remote bus participants. The media access takes place as a time slot, the transmission by means of message technology procedures with service elements or with the summation frameprocedure. The Interbus is characterized by a short, constantcycle time and high transmission reliability. It is divided into subsystems, such as the remote bus, the remote installation bus and the local bus. In terms of topology, it is a ring topology that mutates into a tree topology through distributors. The remote bus is used to connect stations that are spatially far apart, the remote installation bus is for stations that also receive the +24 V supply voltage via the Interbus, and the local bus is for stations that are close together. The Interbus can use STP cables, fiber optic cables or infrared connections as transmission medium. With STP cables, the distance between two nodes can be up to 400 m without repeaters. A PCF fiber (Plastic Clad Fiber) with a wavelength of 660 nm can bridge a maximum of 70 m, an HPCF plastic fiber(Hard Polymer Clad Silica Fiber) up to 300 m, and fiber optic cables up to 3,000 m. The cycle time depends on the number of subscribers, since in the summation frame method the user data of all subscribers are pushed through the ring one after the other. With 512 subscribers and a

Englisch:	Interbus
Updated at:	26.10.2012
#Words:	322
Links:	field, bus, automation, international electrotechnical commission (IEC), enterprise network (EN)
Translations:	DE
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