PROFIBUS is one of the largest open industrial fieldbuses in the world. As with most fieldbus systems, PROFIBUS can reduce operating costs,increase productivity, decrease time to market for new products and improve product quality. 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 (limited to 9). Standard connections are made through use of a 9-pin D-Subminiature connector. Transmission speeds are selectable starting at 9.6kbs.
The PROFIBUS protocol applies to all applications; however it can be combined with industry-specific application profiles and relevant transmission technology to meet differing factory floor requirements. Applications-specific profiles include:
- PROFIBUS DP – optimised for factory automation
- PROFIBUS PA – optimised for process automations
- PROFIsafe – PROFIBUS for safety-related systems
- PROFIdrive – PROFIBUS for motion control
Available from Maser Communications, Belden’s cable for PROFIBUS DP which is in accordance with the PROFIBUS specifications – Product No. 3079A, is a 150-ohm twinax cable that matches the impedance of the factory automation system, allowing for maximum signal transmission. The cable incorporates an overall Beldfoil® shield plus a 65% tinned copper braid for maximum shielding effectiveness. It also carries a UL NEC Type PLTC listing to achieve maximum installation versatility.
Maser also offers 3706F from Belden, a cable made to the ISA/SP-50 Type A fieldbus specifications for PROFIBUS PA application. It is an 18 AWG stranded foil shielded, twisted pair cable with an intrinsically safe, blue PVC jacket.
As always with Belden industrial cables, there are special jacket compounds, colouring and armoring options to fit your exact application
requirements.
For further information contact the Maser Sales team