Fieldbus technology has become established in recent years
alongside conventional field devices and field devices with
HART support. The solutions from the Profibus Organisation or
the Fieldbus FoundationTM are now used in the majority of new
installations. Solutions with fieldbus barriers have largely
replaced the FISCO installations. Fieldbus barriers, such as
the R. STAHL field device couplers, are operated in Zone 1 or
2 on a non-intrinsically safe bus (often called power trunk)
and can integrate both Ex i / FISCO field devices (Ex i FDC),
Ex d / Ex m field devices (Ex e FDC) and simple digital and Ex
i signals (digital I/O couplers). The bus is supplied with the
necessary power for up to 32 field devices using a single
power supply or redundant fieldbus power supplies.
Besides the new ISbus components for the FOUNDATIONTM fieldbus
and Profibus PA , R. STAHL also supplies all-inclusive system
solutions. These range from different types of field housing,
made from plastic, stainless steel, or aluminium, and
innovative solutions with Ex-plug connectors for the
non-intrinsically safe fieldbus to complete system solutions
for all different forms of field signal. Depending on the
application and customer requirements, R. STAHL optimally
combines the components and systems from the Fieldbus ISbus
and remote I/O IS1 sectors to create the most efficient and
low-cost solution.
