MTL 937 FB SS Series Instruction Manual

6 or 12-spur fieldbus barrier

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937x-FB-XX-SS

6 or 12-spur Fieldbus Barrier Assembly

Instruction Manual

(for Version 2 models and later)

INM9370-SS

Table of Contents

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Summary of Contents for MTL 937 FB SS Series

Page 1 937x-FB-XX-SS 6 or 12-spur Fieldbus Barrier Assembly Instruction Manual (for Version 2 models and later) INM9370-SS...
Page 2 INM9370-SS-2 Oct 2010...
Page 4 • No changes to any of the components that might impair their explosion protection are permitted. If any information provided here is not clear: • Contact MTL or one of its representatives. Note: Improper installation and operation of the enclosure can result in the invalidation of the guarantee.
Page 5: Overview
937X-FB-XX-SS Fieldbus Barrier INM9370-SS-2 6- & 12-spur, stainless steel enclosure October 2010 9376-SP - trunk surge 9377-FB - fieldbus barriers protection module 9378-FT - fieldbus terminator module Trunk terminal assembly (TTA) FS32 - spur surge protection module Protective ground stud Carrier Trunk input/output Spur connectors...
Page 6: Description
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-Relcom F800 or FPS Series redundant power supplies. The enclosures are supplied pre–drilled for all trunk and spur cable entries and fitted with Ex e certified blanking plugs and a breather.
Page 7 9371-FB-PS-SS Fieldbus Barrier System, 6 spur Ø 11 x 4 places Figure 3 .1 - External dimensions and mounting hole positions for the 6-way enclosure (9371-FB-XX-SS) 9373-FB-PS-SS Fieldbus Barrier System, 12 spur Ø 11 x 4 places Figure 3 .2 - External dimensions and mounting hole positions for the 12-way enclosure (9373-FB-XX-SS) INM9370-SS-2 Oct 2010...
Page 8: Preparation
CAUTION It is not permitted to create additional holes in the enclosure as this would violate the certification . 3 .2 Preparation a) Remove any temporary protection or packing materials. b) The enclosure can be mounted on any suitable structure using the enclosure’s integral mounting brackets.
Page 9: Initial Electrical Installation
INITIAL ELECTRICAL INSTALLATION WARNING! Before starting any electrical installation work, ensure that the incoming trunk connection is isolated from any source of power . CAUTION Enclosure temperatures could rise to 75°C . Ensure that all cables and cable glands fitted are rated to withstand these temperatures . 4 .1 Overview Obtain access to the contents of the enclosure by removing the lid which is secured to the...
Page 10: Trunk Connections
Whichever method is used, it is important to connect the screen/shield to a ground at only one end of the cable. The following options are available to the user. WARNING! The following may involve changes to wiring in the Trunk Terminal Assembly . No part of the Trunk Terminal Assembly may be worked while the enclosure is powered, unless the environment is known to be non-hazardous .
Page 11 4 .3 .1 Trunk Terminal Assembly Inside the enclosure, the trunk cables are terminated in a Trunk Terminal Assembly (TTA). This is a sub-enclosure with a protective lid, secured with a single screw. This assembly, together with its warning label, is intended to deter a user from working on the trunk connections without isolating trunk power.
Page 12 Non- intrinsically 9371-FB safe trunk 6-spur enclosure Host Control System 9377-FB Fieldbus Barrier Fieldbus module Power Supply (6-spur) Intrinsically safe spur Fieldbus instruments Non- intrinsically 9371-FB 9371-FB safe trunk 6-spur enclosure 6-spur enclosure Host Control System 9377-FB Fieldbus Barrier 9377-FB Fieldbus Barrier Fieldbus module module...
Page 13 Position of Terminator Trunk Surge module module (optional) Cover retaining screw Slide protective cover in this direction to remove Trunk wiring terminals Protective ground stud Trunk cable entry area Enclosure wall Figure 4 .6 - Trunk Termination Assembly (TTA) 1S 2S 3S 1–...
Page 14: Trunk Terminator Module 9378-Ft
4 .4 Trunk Terminator module 9378-FT If the enclosure provides the last (or only) spur connections on the segment, the trunk must be terminated correctly to ensure that the optimum signal quality is maintained. The Trunk Termination Assembly (TTA) has provision for an 9378-FT Terminator module to be fitted when required.
Page 15: Final Checks
To fit an FS32: 1. Unscrew the two captive screws securing the standard pluggable connector (supplied on the carrier) and remove it from its socket. 2. Insert the FS32 module into the now vacant socket on the carrier, tighten the two side securing screws and the central “protective ground”...
Page 16: Fieldbus Barrier - Fitting And Removal
5 .2 Fieldbus Barrier - fitting and removal The 9377-FB Fieldbus Barrier module(s) may be fitted or removed without the need to isolate trunk power. The trunk connections to the barrier module on the carrier have spark suppression by design and cannot cause ignition while they are being connected or disconnected.
Page 17: Terminator And Trunk Surge Protection Modules
5 .3 Terminator and Trunk Surge Protection modules Front clip Safety retaining clip loop Trunk surge Terminator protection module module (2-pins) (4-pins) Rear clip Figure 5 .3 - Module connectors and retaining clips 5 .3 .1 Fitting and removal Both modules have connectors that are designed to prevent an ignition-capable spark when the module is installed or removed.
Page 18: Spur Connections
5 .3 .1 .2 Removing a module Refer to Figures 5.3 and 5.4 for further information. Removal is a two-step process that first breaks the electrical connection, followed by the physical removal of the module from the TTA. • Press the clip at the rear of the module and tilt the module forward until the clip disengages at the rear •...
Page 19: Trunk Connections
5 .5 Trunk connections WARNING! No work is permitted on any part of the Trunk Terminal Assembly while the enclosure is powered, unless the environment is known to be non- hazardous . Gaining access to the contents of the Trunk Terminal Assembly requires the trunk power to the enclosure to be isolated, or a gas clearance certificate obtained.
Page 20: Troubleshooting
TROUBLESHOOTING The Fieldbus Barriers inside the enclosure are fitted with LED indicators to assist the user in fault identification. Consult the following tables to understand the meaning of the LED states. Power LED (Green) Trunk power applied Insufficient or no trunk power CAUTION! The Power LED will not light until the voltage at the barrier has risen to a value of at least 15.7V, but could remain lit even after the voltage has dropped to around...
Page 21: Atex Information
ATEX INFORMATION The Essential Health and Safety Requirements (Annex II) of the EU Directive 94/9/ EC [the ATEX Directive - safety of apparatus] requires that the installation manual of all equipment used in hazardous areas shall contain certain information. This annex is included to ensure that this requirement is met.
Page 22: Repair
b) Care should be taken to limit dust accumulation on the exterior of the apparatus to a depth not exceeding 5mm. c) Maintenance of internal components while powered is limited to those actions permitted in Section 5 of this manual. 7 .4 Repair The modules used in this product cannot be repaired by the user and must be replaced...
Page 23: Appendix 1 - Enclosure Wiring Diagrams
APPENDIX 1 - ENCLOSURE WIRING DIAGRAMS Wiring diagram for 9371-FB-XX-SS page 20 Wiring diagram for 9373-FB-XX-SS page 21 INM9370-SS-2 Oct 2010...
Page 24: Wiring Diagram For 9371-Fb-Xx-Ss
8 .1 Wiring diagram for 9371-FB-XX-SS INM9370-SS-2 Oct 2010...
Page 25: Wiring Diagram For 9373-Fb-Xx-Ss
8 .2 Wiring diagram for 9373-FB-XX-SS INM9370-SS-2 Oct 2010...
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Page 28 Tel: +39 (0)2 61802011 Fax: +39 (0)2 61294560 3413 N. Sam Houston Parkway W. E-mail: info@mtl-inst.it Suite 210 Houston TX 77086 Tel: +1 281 571 8065 Fax: +1 281 571 8069 E-mail: csinfo@mtl-inst.com Group Internet home page http://www.mtl-inst.com/ Members of The MTL Instruments Group...

This manual is also suitable for:

9373-fb-st-ss 9371-fb-ps-ss 9371-fb-pc-ss 9373-fb-ps-ss 9373-fb-pc-ss