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Fieldbus equipment

MTL intrinsically safe fieldbus barriers

Crouse-Hinds series MTL fieldbus barriers provide intrinsically safe spur connections from a high-energy trunk, for connection to suitably certified Foundation™ fieldbus H1 instruments.  Our intrinsically safe fieldbus barriers are available in a variety of configurations and materials, maximizing appliction flexibility.  

  • 9373-FB3 range: Complete enclosure systems for 12 intrinsically safe spur connections
  • 9377-FB3 range:  Compact fieldbus barrier module for 12 intrinsically safe spur connections
  • 937x-FB2 range: Complete enclosure system for 6 or 12 intrinsically safe spur connections
  • 9372-FB range: Redundant fieldbus barrier enclosure for up to 6 intrinsically safe spur connections
  • 9387-FB range: Open frame, redundant fieldbus barrier with pre-assembled system components for up to 5 intrinsically safe spur connections

Open frame versions are designed for installation into user-selected field enclosures. These are suitable for applications requiring special enclosure features such as viewing window or removable gland plate, or where multiple Fieldbus Barrier segments are required in a single enclosure.  Each unit comprises of pre-wired and assembled modular components on a stainless steel baseplate, for installation into an Ex e certified field enclosure without the need for additional internal wiring or ancillary components.

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Certifications and compliances

9373-FB3 range:

  • Ex II 2(1) GD or Ex db eb ib mb [ia Ga] T4 Gb if TP32 trunk surge protector fitted
  • Ex eb ib mb [ia Ga] C T4 Gb
  • Ex tb IIIC T80°C Db
  • Baseefa19ATEX0023X
  • IECEx BAS 19.0016X

9377-FB3 range:

  • Ex II 2(1) G
  • Ex eb ib mb [ia Ga] C T4 Gb
  • Baseefa 19 ATEX0024U
  • IECEx BAS 19.0017U

937x-FB2 range:

  • Ex II 2(1) GD
  • Ex d e ib mb [ia Ga] IIC T4 Gb
  • Ex tb IIIC T80°C Db
  • Baseefa 14ATEX0112X
  • IECEx BAS 14.0058X

9372-FB range:

  • Ex II 2(1)GD
  • Ex d e ib mb [ia Ga] IIC T4 Gb
  • Ex tb IIIC T80°C Db
  • Baseefa 09ATEX0185X 
  • IECEx BAS09.0082X

9387-FB range:

  • Ex II 2(1)G
  • Ex d e ib mb [ia Ga] IIC T4 Gb (-40°C to +75°C)
  • Baseefa 09 ATEX0184U 
  • IECEx BAS09.0081U

For environmental ratings, operating temperatures and shock & vibration ratings, please refer to the datasheets in the resources section.

Design features

  • For Foundation™ fieldbus networks in hazardous areas
  • All models offer compact, modular construction with an ergonomic mechanical design
  • All models compatible with FISCO and Entity-certified fieldbus instruments
  • All models availabe with optional, integrated surge protection for trunk and spurs

9373-FB3 range:

  • Complete enclosure systems for 12 intrinsically safe spur connections
  • Mount in Zone 1 (gas) or 21 (dust) with spurs connected into Zone 0

9377-FB3 range:

  • Compact fieldbus barrier module for 12 intrinsically safe spur connections
  • Mount in Zone 1 (gas) with spurs connected into Zone 0
  • Easy mounting via DIN-rail or panel fixing

937x-FB2 range:

  • Complete enclosure system for 6 or 12 intrinsically safe spur connections
  • Mount in Zone 1 (gas) or 21 (dust) with spurs connected into Zone 0

9372-FB range:

  • 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

9387-FB range:

  • Pre-assembled system components for up to 5 intrinsically safe spur connections
  • For assembly into user-specified field enclosure
  • For installation in a Zone 1 hazardous area, mount module into an Ex e certified field enclosure

Standard materials

  • 9373-FB3 range: stainless steel enclosure
  • 937x-FB2 range: stainless steel or glass reinforced polyester enclosures
  • 9372-FB range: stainless steel or glass reinforced polyester enclosures 
  • 9387-FB range: stainless steel backplate
Specificaties

Ordering Information

Part Number Description Range Hazardous Area Certificationsc*
1. Simplex, 12 way MTL Compact Fieldbus Barrier
9373-FB3    Fieldbus Barrier system, 12 spur SS enclosure FB3 ATEX & IECEx Approved
9377-FB3-Px    Fieldbus Barrier module, 12 spur FB3 ATEX & IECEx Approved
2. Redundant versions, Glass Reinforced Polyester and Stainless Steel enclosures
9372-FB-Px-xx    Redundant Fieldbus Barrier system, 5 spur FB ATEX & IECEx Approved
3. Redundant version, Open Frame– for installation into 3rd party enclosure
9387-FB-xx-R    Redundant Fieldbus Barrier baseplate, 5-spur FB ATEX & IECEx Approved
4. Simplex versions, Stainless Steel (SS) enclosure
937x-FB2-Px-SS    Fieldbus Barrier system, 6 and 12 spur, SS enclosure FB2 ATEX & IECEx Approved
5. Simplex versions, Glass Reinforced Polyester (GRP) enclosure
937x-FB2-Px-PP    Fieldbus Barrier system, 6 and 12 spur, GRP enclosure FB2 ATEX & IECEx Approved
6. Simplex versions, Open Frame – for installation into 3rd party enclosure
938x-FB2-Px-xx    Fieldbus Barrier baseplate, 6 and 12 spur FB2 ATEX & IECEx Approved
7. Accessories
9376-SP    Trunk surge protection device FB, FB2 ATEX & IECEx Approved
FS32-XE    Fieldbus trunk surge protection device FB3 ATEX & IECEx Approved
FS32    Fieldbus spur surge protection device FB, FB2, FB3 ATEX & IECEx Approved
9378-FT    Fieldbus barrier terminator  FB ATEX & IECEx Approved
F93-XE    Fieldbus barrier terminator FB2 ATEX & IECEx Approved
9377-FB-R   Fieldbus barrier module FB, FB2 ATEX & IECEx Approved
* Select Certification Reports under the Resources tab for full list of certifications
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