Eaton 9377-FB3-Px MTL Compact Fieldbus Barrier Module 12 spur

• For Foundation™ fieldbus networks inhazardous areas

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

• Easy mounting via DIN-rail or panel fixing

• Compatible with FISCO and Entity-certified fieldbus instruments

• Compact, modular construction

• Optional, integrated surge protection for trunk and spurs

The 9377-FB3-Px Fieldbus Barrier module is a further enhancement

of the established 937x product range, and provides a compact

and economic solution for Foundation fieldbus networks in

hazardous area applications. The field-mounted barrier receives

power and FOUNDATIONTM fieldbus H1 communications via

a non-intrinsically safe trunk and converts this to a number of

galvanically isolated, intrinsically safe, spur connections.

The trunk terminals are implemented as increased safety (Ex e)

and the spur terminals as intrinsically safe (Ex ia) for connection

to IS fieldbus instruments in IIC, Zone 0 hazardous areas.  The spur

connections are compatible with both FISCO and Entity-certified

field instruments.

For Zone 1 hazardous area mounting the fieldbus barrier must be

mounted in a suitable, increased safety, (Ex e) enclosure that will

segregate spur and trunk cabling in accordance with hazardous

area requirements. Complete, pre-assembled enclosure systems

are also available -consult Eaton. The barrier module has a separate

compartment, which contains increased safety (Ex e) trunk wiring

terminals where the incoming trunk wiring terminates. This

compartment has a protective cover to deter interference, and

carries a warning to the user not to work on trunk wiring without

first isolating the power. A fieldbus terminator is included; this

can be disabled where the fieldbus trunk is extended to a second

Fieldbus Barrier Module.

A single barrier module provides 12 spur connections. Each spur is

short circuit protected, so that other devices continue to operate in

the presence of field wiring faults.

Surge protection can also be added on the spur connections by the

use of individual Spur Surge protection modules (part no. FS32).

Surge protection of the fieldbus trunk connection can be provided

using protector type TP32-I-NDI; consult Eaton MTL for pre

engineered enclosure systems containing appropriate electrical

and mechanical hardware.

The 9377-FB3-Px fieldbus barrier module is bus-powered and

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

fieldbus host control system, power for the trunk must be provided

only by a supply conforming to IEC 61158-2. e.g. MTL F800 or MTL

918x-x2 range of redundant power supplies.

The module has four mounting lugs with holes, enabling it to be

mounted to a suitable mounting plate inside an enclosure using

either bolts or fixed studs. Alternatively, it has built-in mounting

clips to permit it to be mounted onto ‘top-hat’ DIN rail, 35mm x

7.5mm, complying with EN60715 or similar local standards.