Foundation Fieldbus Cable Specification

Ff 844 is the new fieldbus foundation cable compliance specification.

Foundation fieldbus cable specification.

1 2009 fieldbus foundation dr. With the high cost of downtime in industrial applications it pays to invest in cables like belden s fieldbus to ensure maximum protection and performance. All trunk cables and spur cables must follow specification for instrument cabling iec 61158 2. These more detailed specifications are needed so that devices made by different manufacturers are interoperable in a control system.

Foundation fieldbus cable length fieldbus segment is limited to a maximum of 1900 meters this total segment length is computed by adding the length of the main trunk line and all the spurs that extend from it. Ff 844 h1 and iec 61158 2 type a. Belden cables are designed to withstand the destructive effects of temperature extremes humidity moisture dust and oil. Detailed implementation requirements beyond the standard are available from the fieldbus foundation an industry consortium that promotes fieldbus technology.

Fieldbus cable is rated according to a four level code a b c or d each successive letter representing a cable of lower quality6. Bear in mind that the maximum length given for each cable type is the total length. Foundationtm fieldbus itc and pltc listed cables explained. Fieldbus profiles are standardized by the international electrotechnical commission iec as iec 61784 61158.

It is targeted for applications using basic and advanced regulatory control and for much of the discrete control associated with. Fieldbus is the name of a family of industrial computer networks used for real time distributed control. It is an open architecture developed and administered by fieldcomm group. Fieldcomm group manages the f oundation fieldbus technical specifications and other related documents and provides.

A complex automated industrial system is typically structured in hierarchical levels as a distributed control system dcs. In this hierarchy the upper levels for production. Foundation fieldbus styled foundation fieldbus is an all digital serial two way communications system that serves as the base level network in a plant or factory automation environment. Fieldbus is defined in iec standard 61158 2.

Our ff cable features excellent electrical charateristics low capacitance for long runs rohs compliant and ce marked. The fieldcomm group is the developer owner and standards organization for the f oundation fieldbus technology establishing and controlling new developments and enhancements that support the needs of the process automation industry. Ff 844 includes the electrical requirements of isa 50 02 and iec 61158 but it also contains some additional requirements which help you know your cable is the right cable for use in foundation fieldbus control networks. Cable specification foundation fieldbus ff 844 h1 cable design based on en 50288 7 bs 5308 part 1 iec 60332 electrical properties.