The 9372-FB may therefore be selected for critical process

applications where failure of the Fieldbus Barrier would

otherwise result in unacceptable downtime or lost production.

It is also ideal for use in Fieldbus Safety Instrumented Function

(SIF) networks in which nuisance trips cannot be tolerated.

Failure annunciation to the host control system is provided by

means of an integrated Foundation™ fieldbus device with Digital

Input Function Block capability.

In common with conventional Fieldbus Barriers, each

intrinsically safe spur is capable of supporting a FISCO or ‘Entity’

certified fieldbus device located in a Zone 0 or 1

hazardous area. The short-circuit protected spurs are

galvanically isolated from the trunk and require no protective

ground connection in the field.

The 9372-FB redundant fieldbus barrier is based on our

revolutionary 9370-FB range of products, which are supplied

as complete, factory-assembled enclosure systems that do not

require additional wiring, customised housings or complex

ancillary components. Electrical and mechanical aspects of the

design are integrated, providing the industry’s first complete,

ergonomic solution for ‘High Energy Trunk’ applications in

hazardous areas.