Uniquely, the key modular components of the system (Fieldbus

Barrier, Terminator and Surge Protectors) may be ‘hot-plugged’ by

design and without gas-clearance procedures or separate isolating

switches. This virtually eliminates the risk associated with hazardous

area maintenance activities, speeds module replacement and avoids

the need for specialist operator training. Further optional features

include pluggable surge protection components for the fieldbus trunk

and individual spurs.

The 9387-FB-R Fieldbus barrier assembly is bus powered and

requires no additional power supply in the field. When used with a

fieldbus host control system, power for the trunk may be provided by

redundant MTL power supplies.