2008-04-22
Belden expands line of DataBus cables for FieldBus applications
Belden has introduced new FieldBus Type A multi-pair cables and foil/braid cables which provide installation flexibility in many different environments and where multiple or extended cable runs are required.
The number of devices possible on a fieldbus link will vary depending on factors such as the power consumption of each device, the use of repeaters, signal attenuation, type of cable used and distance. Because of the superior features of Belden DataBus cables, standard distance limitations can be exceeded without any system enhancements or any sacrifice in system performance.
Belden FieldBus cables are suitable for use in Class 1, Div. 2 applications and compliant with FieldBus Specification IEC 61158-2 (ISA/SP-50). They are also RoHS compliant and CE approved. Features include excellent electrical characteristics and low capacitance for long runs.
Cables are available with 22, 18, 16 and 14 AWG stranded tinned copper conductors, and as multi-pair cables available in 2 to 24 pairs. Versions are available with Beldfoil® shields and Beldfoil Plus Braid shields.
As always with Belden industrial cables, for specific applications, custom cable constructions are available with 600V, TC rated; aluminum or steel interlocked armor; CPE jacket or LSOH jacket; various jacket colors; alternate black and white color-coded pairs; multi-pair type B 22 AWG, PLTC-rated, individually and/or overall shielded; and multi-pair 18 AWG, TC-rated, individually and/or overall shielded.
About Fieldbus
Fieldbus is an all-digital, serial, two-way communications protocol that standardizes the interconnection of field devices at a communications rate of 31.25 kB/s. The field devices are made accessible to communication networks (running at 1 or 2.5 Mb/s), through use of linking devices. Because a simple twisted pair of wires can carry the signals between the field devices and the networks, Fieldbus users can reduce the amount of I/O and control equipment (due to distribution of control into the field devices), plus they can use fewer Intrinsically Safe (IS) barriers, cabinets, cables and connectors. And, since the wire pair can support multiple functions within a single device (such as diagnostics, control and auto error correction), the twisted pair cable becomes the integral part of a more efficient, more reliable, and more cost-effective industrial control system.
With FOUNDATION Fieldbus, end users have the freedom to implement tightly integrated digital control based on a unified system architecture and a high-speed backbone (HSE) for plant operations. This, in turn, removes the constraints on device and sub-system interoperability. Fieldbus has chosen Ethernet for HSE control backbone 100Mb/s transmissions.
