The 9372-FB Redundant Fieldbus Barrier is based on MTL’s revolutionary

9370-FB Series 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.

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.

Optional features include pluggable surge protection components for the fieldbus

trunk and individual spurs. Connection facilities with generous room for cable

management are provided within the Fieldbus Barrier enclosure for the trunk and

spur wiring.

For added flexibility, a redundant-capable enclosure can be specified part-populated

with one 6-spur module (model no. 9375-FB). This permits future upgrading from

simplex to redundant mode simply by plugging in an additional Fieldbus Barrier

module and optional alarm module.

The 9372-FB Fieldbus Barrier 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-Relcom power supplies.