Belden 3076F 18 AWG DataBus ISA/SP-50 Profibus Cable - Orange - 1000 Foot

PROFIBUS is the world's most popular fieldbus system. As with most fieldbus systems, PROFIBUS can reduce operating costs, increase productivity, decrease time to market for new products and improve product quality. And, unlike standard 4-20mA controls, PROFIBUS can support up to 32 devices per segment - up to a total of 126 devices, depending on total system current.
Using shielded twisted pair cable, the PROFIBUS topologies utilized in the industrial environment include the following configurations: line, tree and star (and combinations of these topologies). The network can support up to 126 nodes by using repeaters, but the number of repeaters is limited to nine. Standard connections are made through use of a 9-pin D-Subminiature connector. Transmission speeds are selectable from 9.6kbps to 12Mbps.

PROFIBUS has been developed in conjunction with the International Standards Organization OSI (Open Systems Interconnect) seven-layer model. Access to the bus is defined in the second layer of the OSI model, allowing PROFIBUS the option of multiple masters on a single twisted pair cable.

The PROFIBUS protocol applies to all applications, but it may be combined with industry-specific application profiles and relevant transmission technology to meet differing factory floor requirements. Application-specific profiles include:
PROFIBUS DP -- optimized for factory automation
PROFIBUS PA - optimized for process automation
PROFIsafe - PROFIBUS for safety-related systems
PROFIdrive - PROFIBUS for motion control