Home > Belden introduces PROFIBUS cables for field bus applications

Belden introduces PROFIBUS cables for field bus applications

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Belden has developed a cable for PROFIBUS DP that is in accordance with the PROFIBUS specifications. The cable, Product No. 3079A, is a 150-ohm twinax (twisted pair) 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.
 
The cable also carries a UL NEC Type PLTC listing to achieve maximum installation versatility. Belden also offers Product No. 3076F; a cable made to the ISA/SP-50 Type A fieldbus specifications for PROFIBUS PA application. The cable 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, coloring, and armoring options to fit the exact application requirements.
 
About PROFIBUS
 
PROFIBUS is one of the largest open industrial field busses in the world. As with most field bus
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.
 
PROFIBUS Features
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 starting at 9.6kbs. PROFIBUS has been developed on 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.
 
PROFIBUS Applications
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 the following:
PROFIBUS DP — optimized for factory automation
PROFIBUS PA — optimized for process automation
PROFIsafe — PROFIBUS for safety-related systems
PROFIdrive — PROFIBUS for motion control
 
Belden Cables for PROFIBUS
Belden has developed a cable for PROFIBUS DP that is in accordance with the PROFIBUS specifications. The cable, Product No. 3079A, is a 150-ohm twinax (twisted pair) 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. The cable also carries a UL NEC Type PLTC listing to achieve maximum installation versatility. Belden also offers Product No. 3076F; a cable made to the ISA/SP-50 Type A fieldbus specifications for PROFIBUS PA application. The cable 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, coloring, and armoring options to fit the exact application requirements.
 

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