Eaton 9387-FB, 9388-FB Fieldbus Barrier internal components, without enclosures

• For Foundation™ fieldbus networks in

hazardous areas

• Pre-assembled system components

for 6 or 12 intrinsically safe spur

connections

• For assembly into user-specified field

enclosures

• Spurs 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 9387-FB (6-spur) and 9388-FB (12

spur) Fieldbus Barrier assemblies provide

intrinsically safe spur connections from a

high-energy trunk, for connection to

suitably certified Foundation™ fieldbus H1

instruments. Each unit comprises pre-wired

and assembled system components on a

stainless steel baseplate, for installation into

a suitably certified field enclosure. Connection

facilities are provided for the trunk and spur

wiring, as well as all electronic modules

needed to support a fully-working Fieldbus

Barrier. In a typical application, an Ex e

(increased safety) certified field enclosure will

be selected to allow installation in a Zone 1

hazardous area; third-party approval of the

enclosure and contents is normally required.

Alternative uses include applications that are

not satisfied by the 9370-FB Series Fieldbus

Barriers in standard enclosures, such as the

installation of multiple fieldbus segments

inside a single field enclosure.

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 units are bus powered and

require no additional power supply in the

field. When used with a fieldbus host control

system, power for the trunk may be provided

by MTL power supplies in redundant or non

redundant format.

The 9387-FB and 9388-FB share the unique

features of MTL’s class-leading 9370-FB

Series Fieldbus Barrier system. 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.