Eaton 9372-FB Series Redundant Fieldbus Barrier Enclosures, 5/6 spur

• For Foundation™ fieldbus networks in hazardous areas

• Redundant configuration for super high system availability

• Complete enclosure systems for up to 6 intrinsically safe spur connections

• Failure alarm direct to host control system via integrated fieldbus device

• Mount in Zone 1 (gas) or 21 (dust) with spurs connected into Zone 0

• Compatible with FISCO and Entity certified fieldbus instruments

• Ergonomic mechanical design

•  Pluggable system components, without 'gas free' constraints

• Optional, integrated surge protection for trunk and spurs

The 9372-FB Redundant Fieldbus Barriers are field-mounted wiring hubs that create

up to six intrinsically safe spur connections from a high-energy trunk, for connection to

suitably certified Foundation™ fieldbus H1 instruments. They may be installed in Zone 1

(gas) or Zone 21 (dust) hazardous areas, with the trunk wiring implemented using suitably

protected cable and increased safety (Ex e) connection facilities.

Each enclosure system uses duplicated Fieldbus Barrier modules in a redundant

configuration to achieve significantly higher system availability than equivalent

‘simplex’ units. 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 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.