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Summary of Contents for MTL 9312-FB-ST-SS-SP
- Page 1 9312-FB-ST-SS-SP Fieldbus Barrier Instruction Manual INM9312...
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Page 2: Table Of Contents
Appendix 1 - Technical data ............18 © 2008 MTL Instruments. All rights reserved. -
Page 3: General Information
9312-FB-ST-SS-SP Fieldbus Barriers INM9312-ST-SS-SP-1 Oct 2008 GENERAL INFORMATION Warning information Warnings are occasionally provided in these operating instructions in the following manner: They are always identified by the signalling word "WARNING“ and sometimes also have a symbol which is specific to the danger involved. - Page 4 Fieldbus instrument A field instrument that is capable of communicating in a fieldbus network. Typical fieldbus instruments are valves and transmitters. Host The fieldbus control system, including the fieldbus interface card. Segment A section of fieldbus that is terminated in its characteristic impedance, meaning a cable and fieldbus devices installed between a pair of terminators.
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Page 5: General Safety Information
GENERAL SAFETY INFORMATION Safety instructions for installation and operating personnel These operating instructions contain basic safety instructions for installation, operation and maintenance and servicing. Failure to comply with these instructions can endanger personnel, the plant and the environment. WARNING Risk due to unauthorised work being performed on the device! There is a risk of injury and damage to equipment Maintenance, installation, commissioning and servicing work must only be performed by personnel who are both authorised and suitably trained for this purpose... -
Page 6: Scope Of Application
Use the Fieldbus Barrier only under the conditions described in its operating instructions. Other uses are not valid. The series 9312-FB-ST-SS-SP Fieldbus Barrier is suitable for use in Zone 1 and Zone 2 hazardous areas. It is used for connecting up to eight intrinsically safe field devices to a non-intrinsically safe trunk;... -
Page 7: Functional Description
FUNCTIONAL DESCRIPTION Each 9312-FB-ST-SS-SP Fieldbus Barrier is used for connecting up to eight, intrinsically safe field devices to a non-intrinsically safe trunk; providing galvanic isolation between trunk and spurs. Up to four 9312- FB-ST-SS-SP Fieldbus Barriers may be connected in a filedbus segment, thereby providing up to 32 spurs. -
Page 8: Device Construction
DEVICE CONSTRUCTION Figure 4: Trunk connections The Ex e connection terminals for the trunk and the jumper for activating the terminating resistor are protected by a hinged cover (IP 30). Spur connections Ex i connection terminals for spurs 1 – 8 Indicator LEDs for spurs 1 –... -
Page 9: Transport, Storage And Disposal
TRANSPORT, STORAGE AND DISPOSAL Transport The product is to be transported in its original carton and handled carefully. Storage Storage temperature range: –40°C to +75°C Store in a dry place in its original packing. Disposal Ensure environmentally friendly disposal of all components according to legal regulations. MOUNTING WARNING Incorrectly installed components! -
Page 10: Examples Of Fieldbus Segment Topologies
Examples of fieldbus segment topologies Fieldbus segment with "daisy chain" structure. The trunk is looped through the Fieldbus Barrier. Fieldbus power Host supply Trunk length 1 Trunk length 2 Trunk length 3 Trunk length 4 Trunk not Ex i 9312-FB 9312-FB 9312-FB 9312-FB... -
Page 11: Cable Lengths For Trunk And Spurs
8.2.1 Proof of intrinsic safety in accordance with FISCO A spur is intrinsically safe if: ♦ the field device is certified in accordance with FISCO. ♦ the conditions regarding cable values as per IEC 60079-27 are adhered to: 15 –150 ohm/km 0.4 –... -
Page 12: Connections
Connections WARNING Laying intrinsically safe and non-intrinsically safe cables together! Explosion protection is no longer in force. Intrinsically safe and non-intrinsically safe cables must be separated in accordance with IEC 60079-14. Foundation fieldbus H1 or Profibus PA Field devices SPUR 1 –... - Page 13 Figure 9: Trunk and spur connections Trunk WARNING IP30 cover open on the non-intrinsically safe trunk: Explosion protection is not in force when the cover is open. Power to the fieldbus must be de-energised before opening the cover. If the isolating switch is inside the hazardous area it must be suitably protected. The fieldbus trunk must be secured against unauthorised activation at this time.
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Page 14: Earthing / Grounding
The 9312-FB-ST-SS-SP Fieldbus Barrier incorporates galvanically isolated safety barriers for the spur wiring, so an intrinsic safety earth connection is not required. A number of options for grounding cable screens is available on the 9312-FB-ST-SS-SP barrier, including ‘capacitive’ and direct grounding. - Page 15 Option 2 - Local grounding of spur cable shields Figure 11: Spur cable shields to earth busbar If plant or local regulations require that the spur cable shields be grounded at the Fieldbus Barrier, then the arrangement shown in Figure 11 may be adopted. With this arrangement, the spur cable shields are connected to local ground via the cable shield busbar.
- Page 16 Option 3 - Multiple points of grounding Figure 12: Multiple point grounding In installations where potential equalisation is known to provide a consistent, low impedance ground plane throughout the plant, the fieldbus cable may be grounded at more than one point. This is illustrated in Figure 12 where the trunk and spur cable shields are interconnected at the cable shield busbar (1) and the busbar is connected to local ground (2).
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Page 17: Fieldbus Terminating
Fieldbus Terminating A fieldbus terminator is required at both ends of the trunk. Spurs are operated without terminating resistors. Fieldbus Barrier is located at the end of the trunk Figure 13: - Terminator jumper fitted In this case, the terminals on the "TRUNK OUT" terminal block are not to be used. Remove the factory-provided jumper from its storage position (1). -
Page 18: Commissioning And Operation
COMMISSIONING AND OPERATION Before commissioning Test the components for correct operation and installation in accordance with the operating instruc- tions and other applicable specifications. Check that cables and lines are clamped properly. Inspect housing for damage. Inspect housing for foreign bodies. Check whether all unused cable glands and holes are sealed off properly. -
Page 19: Maintenance
10.2 Repair work WARNING Danger due to improper maintenance/repairs! Explosion protection is not guaranteed any longer. Repairs to the device must only be performed by MTL or an authorised representative 10.3 Cleaning ♦ Clean with a damp cloth only, using water or mild, non-abrasive, non-scratching cleaning agents. -
Page 20: Appendix 1 - Technical Data
APPENDIX 1 - TECHNICAL DATA Explosion protection Fieldbus Barrier II 2 (1) G D Ex mb e ib [ia] IIC/IIB T4 module BVS 06 ATEX E 135X Ta = –40°C to +75°C Spurs “FISCO“ according to IEC 60079-27 suitable enclosure neccessary Fieldbus Barrier II 2 (1) G EEx mb ed ib [ia] IIC T4 enclosure:... - Page 21 Reverse polarity protection Max. number of Fieldbus Barriers per trunk Termination Built-in terminator (100Ω + 1μF according to IEC 61158-2). A jumper between terminals indicated by connects terminator to the trunk. Spurs, intrinsically safe FISCO Ex i Number Number of field devices 1 per spur Max.
- Page 22 Enclosure material Stainless steel Degree of Protection IP 66 Cable entries Blanking plugs 8 x M 20 (spurs), stainless steel 2 x M 20 (trunk), stainless steel Breathing gland 1 x M 25, stainless steel Dimension Drawings (all dimensions in mm) 9312-FB-ST INM9312-FB-ST-SS-1 Oct 2008...
- Page 23 INM9312-FB-ST-SS-1 Oct 2008...
- Page 24 4001 W. Sam Houston Parkway N., Suite 150 Tel: + 91 (0)44 24501660/24501857 Fax: + 91 (0)44 24501463 Houston TX 77043 E-mail: sales@mtlindia.com Tel: +1 281 571 8065 Fax: +1 281 571 8069 E-mail: info@mtl-inst.com Group Internet home page http://www.mtl-inst.com/ Members of The MTL Instruments Group...
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