INM 9370-RD Rev 5
3
1
OVERVIEW
This manual explains the installation and maintenance procedures for the
9372-FB-xx-yy Redundant Fieldbus Barrier enclosures and must be read in association
with the product datasheets that contain the electrical data.
The 9372-FB-xx-yy Redundant Fieldbus Barriers are field-mounted wiring hubs that create
five (or six*) intrinsically safe spur connections from a high-energy trunk, for connection
to suitably certified
F
oundation
™ 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 a pair of Fieldbus Barrier modules in a “redundant spur“
configuration to achieve significantly higher system availability than equivalent ‘simplex’
units. The 9372-FB-xx-yy 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.
The enclosure options are: electrochemically polished 316 stainless steel or glass-reinforced
plastic (GRP) and either may be installed in a Zone 1 or Zone 2 hazardous area.
The following enclosure types are available by ordering the appropriate model number.
9372-FB-Px-yy
5-spur Redundant Fieldbus Barrier enclosure
9375-FB-Px-yy
6-spur Redundant-ready Fieldbus Barrier enclosure
Where Px =
PS (pluggable screw terminal connectors) or
PC (pluggable spring clamp connectors)
and yy =
SS (316L stainless steel enclosure) or
PP (GRP enclosure - black)
* See section 2.2
937X-FB-Px-yy Redundant Fieldbus Barrier
5-spur enclosures
Figure 1.1 - Example of model 9372-FB-XX-SS
