Eaton MTL4850 Instruction Manual
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Eaton MTL4850 Instruction Manual

Hart connection systems
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Instruction Manual
MTL HART
Interfacing Solutions
®
MTL4850 and MTL4854
HART® Connection Systems
DRAFT - 11 December 2014
March 2015
INM 4850_54 Rev4

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  • Page 1 DRAFT - 11 December 2014 Instruction Manual March 2015 MTL HART Interfacing Solutions ® INM 4850_54 Rev4 MTL4850 and MTL4854 HART® Connection Systems...

  • Page 2: Declaration Of Conformity

    DRAFT - 11 December 2014 DECLARATION OF CONFORMITY We declare under our sole responsibility that the MTL4850 and MTL4854 and associated products listed below, to which this declaration relates, conform to the requirements of the Directives below by compliance with the standards listed: 1.
  • Page 3 DRAFT - 11 December 2014 DRAFT - 11 December 2014 GENERAL SAFETY INFORMATION The following methods are used in this manual to alert the user to important information:- WARNING! Warnings are provided to ensure operator safety and MUST be followed. CAUTION Cautions are provided to prevent damage to the instrument NOTE...
  • Page 4 DRAFT - 11 December 2014 THIS PAGE IS LEFT INTENTIONALLY BLANK INM MTL4850_54 Rev4...

  • Page 5: Table Of Contents

    MTL4850 – installation ........
  • Page 6 DRAFT - 11 December 2014 THIS PAGE IS LEFT INTENTIONALLY BLANK INM MTL4850_54 Rev4...

  • Page 7: Introduction

    The MTL4850 HART Maintenance System enables a user to calibrate, configure and maintain an entire network of 'smart' field devices from a single workstation. The key element that makes this possible is the MTL4850 or MTL4854 modules, which provide the multiplexing for the individual field devices, making each one addressable and identifiable from the workstation.
  • Page 8 For any application of the multiplexers where connection is made to signals which are part of a safety instrumented system then the MTL4850 must be used. Refer also to the safety manual for the MTL4850 available from the MTL website.

  • Page 9: General Purpose Or Is

    Appendix A. Connection methods There are currently three methods for linking the HART signals to the MTL4850 or MTL4854: a) using an integrated connection unit – HTP-SC32 - see Figure 2.2 b) via a connection unit to a HART interface (HMP-HM64) - see Figure 2.3 c) using an IS isolator backplane with a HART interface - see Figure 2.4...
  • Page 10 • 16-channel backplane CPH-SC16 and CPH-SC16R • 32-channel backplane CPH-SC32 and CPH-SC32R Both backplanes accommodate 16 MTL4500 Series IS isolator modules and an MTL4850 or MTL4854 multiplexer module. MTL4850/54 Figure 2.4 HART CPH-SCxx backplane The CPH-SC16 backplane is designed for MTL4541 single channel isolators and has 16 field terminals, while the CPH-SC32 has 32 field terminals for MTL4544/4544A dual channel isolator modules.

  • Page 11: Safety Information

    HART maintenance facilities. The HTP-SC32 provides a self- contained solution because the MTL4850/54 HART multiplexer is already on-board and requires only DC power and a simple RS485 link to the host management PC to get started.
  • Page 12 DRAFT - 11 December 2014 Model Description HTP-SC32 no parallel resistor, zero ohm link fitted in series (used for current inputs with 250 input impedance or HART compatible outputs) HTP-SC32-P250 parallel resistor, zero ohm link fitted in series Table 4.1 (used for 1–5V system inputs) HTP-SC32 model...

  • Page 13: Hmp-Hm64 Hart Interface

    Designed to be connected to remote connection units or backplanes via ribbon cables the HMP-HM64 HART interface provides the user with an interface easily configurable and expandable to meet system requirements. It accommodates two MTL4850/54 HART multiplexer modules and is therefore capable of supporting 64 channels itself: it can also be daisy-chained with others to support further channels on one serial RS485 link.
  • Page 14 A 5-way DIP switch array (SW1) is provided on the HMP-HM64 circuit board to enable unique HART addresses to be set for the two MTL4850 modules. The switch is binary coded, but the HMP-HM64 has only even number address setting options 0, 2, 4, 8, 16 and 32. This is because the board will accommodate two modules but it is only necessary to set the address of one of them, the other adopts the odd address immediately above it.
  • Page 15 However, this is normally unnecessary as, to maintain integrity, each group of cabinets terminals would communicate their HART signals via independent MTL4850/54 modules using the RS485 interface. HCU16AO 16ch I.S. 4-20 mA analogue...

  • Page 16: Hcu16 Hart Connection Unit

    DRAFT - 11 December 2014 HCU16 HART connection unit The HCU16 HART connection unit - see Figures 4.6 & 4.7 - provides a connection interface between the field wiring and the onward link to the host/system control for non-hazardous areas. It also provides a take-off point for the HART signals to the maintenance system. Each channel has three terminals: +ve, -ve and a transmitter supply terminal (Tx +) –...
  • Page 17 DRAFT - 11 December 2014 DRAFT - 11 December 2014 Figure 4.7 HCU16 schematic diagram HMP-HM64 HART INTERFACE INM MTL4850_54 Rev4...

  • Page 18: Hcu16Ao Hart Connection Unit

    DRAFT - 11 December 2014 HCU16AO HART connection unit Many older instruments have 4-20mA analogue outputs that are not compatible with HART data because their impedance is normally too low for the HART to operate correctly. In addition, the noise generated by the analogue output can sometimes interfere with the HART data, or sometimes the HART signal can even affect the stability of the current signal.
  • Page 19 DRAFT - 11 December 2014 DRAFT - 11 December 2014 HMP-HM64 HART INTERFACE Figure 4.9 HCU16AO schematic diagram INM MTL4850_54 Rev4...

  • Page 20: Mtl Customised Backplanes

    A 6-way DIP switch (SW1) is provided on the backplane to enable a unique HART address to be set for the MTL4850 or MTL4854. The switch is binary coded and the relevant ‘bits’ should be switched to the ON position. See Section 5.3.2 for additional information.
  • Page 21 MTL4541 MTL4541 MTL4541 MTL4541 MTL4541 MTL4546 MTL4546 MTL4546 MTL4546 MTL4546 MTL4546 MTL4546 MTL4850 HART HART Channels 14 15 Channels 1-16 17-32 DATE CODE LABEL M ea surem en t Techno log y Ltd. Lu ton , Englan d Carrier weight: 415g (nominal) Figure 4.11 CPH-SC32(R) backplane...

  • Page 22: Backplane Mounting

    DRAFT - 11 December 2014 Backplane mounting 4.7.1 Surface mounting 4.7.2 Surface mounting kit (type SMS01) is available for this purpose. SMS01 contains 40 sets of the components shown in Figure 4.12. M4 x 20mm screw (A) Locking washer (B) Figure 4.12 Backplane Surface mounting...

  • Page 23: Backplanes - Identification And Tagging

    DRAFT - 11 December 2014 DRAFT - 11 December 2014 Fit backplane Refer to figure 4.13. a) Select a mounting screw (A). b) Place a locking washer (B) and a plain washer (C) over it. c) Insert the screw through a fixing hole on the baseplate. d) Fit a spacer (D) and retain it with washer (E).

  • Page 24: 4.10 Backplanes - Connections

    DRAFT - 11 December 2014 4.10 Backplanes – connections 4.10.1 Hazardous area - field wiring connections WARNING! Personnel that carry out connection of wiring to or from hazardous areas must be correctly trained. Unless this work is done correctly, it can endanger the lives of site workers and seriously damage equipment.
  • Page 25 DRAFT - 11 December 2014 DRAFT - 11 December 2014 4.10.4 Safe area – ring-mained power supplies A “ring main” system can be used to distribute power to these backplanes in a safe area . This permits individual backplanes to be taken out of service without affecting supplies to other backplanes.

  • Page 26: 4.11 Cabling Recommendations

    The interface bus provides a connection between two CPH-SC16 or CPH-SC16(R) backplanes to provide an additional 16 modules to the MTL4850/54. This connection is made via a 34-way ribbon cable between connector P2 on the backplane carrying the multiplexer and connector P1 on the backplane carrying only the additional modules as shown in Figure 4.19.
  • Page 27 ‘false’ characters. MTL4850 multiplexer modules from MTL have no built-in facility for terminating or biasing the network; as this is often provided by the RS232/RS485 converter.

  • Page 28: Modules

    5.3.3.3 Scan list Each loop connected to an MTL4850/54 is added to the scan list if a HART device is detected on power up or if the instrument maintenance software resets the module. Loops can be added individually or removed from the scan list using the “loop rebuild“ facility in the instrument maintenance software.

  • Page 29: Fault Finding And Routine Maintenance

    2. Check that backplane power LEDs are ON. If not, check the power supply fuse(s) and, if necessary, change any of them. 3. Check that the (PWR) power LED on the MTL4850/54 module is ON. If not, and the circuit board power LED is ON, replace the module.

  • Page 30: Routine Maintenance

    FDT Technology as a frame for the various communication elements. MTL provides the software driver files to support each of these approaches. The example below shows the integration of an MTL4850 HART Multiplexer within the Emerson AMS package applying the MTL4850 DD file.

  • Page 31: Software Setup

    This second example shows the deployment of the MTL Comms DTM (Device Type Manager) within the Fieldcare package from Endress+Hauser and Metso that uses FDT Technology. The MTL Comms DTM enables an MTL4850/54 system to pass HART data to any IMS that utilises the FDT/DTM concept.

  • Page 32: Applications Involving Zone 2 Hazardous Areas

    Annex II of the directive, such as those in clause 1.2.7. c) The MTL4850/MTL4854 and associated products mentioned in the DoC are certified as meeting the requirements of IEC/EN 60079-15 for Zone 2 applications and the European...

  • Page 33: Repair

    This product cannot be repaired by the user and must be replaced with an equivalent certified product. Marking Each device is marked in compliance with the directive and relevant standards. Equipment Name: MTL4850 & MTL4854 HART Multiplexer System IECEx Certificate No: IECEx BAS 14.0125X Certification Code Ex nA IIC T4 Gc (-40°C ≤ T ≤...

  • Page 34: Appendix B - Alarm Event Log

    DRAFT - 11 December 2014 APPENDIX B - ALARM EVENT LOG The multiplexer maintains a log of alarm events that may read using the Instrument Management Software. The types of event that might appear can be grouped into the following categories: •...
  • Page 35 DRAFT - 11 December 2014 DRAFT - 11 December 2014 !Background diagnostics not running Return to MTL if alarm persists. !RAM test not running Return to MTL if alarm persists. !Bad call to diagnostic monitor Return to MTL if alarm persists. !RAM test copy address corrupted Return to MTL if alarm persists.
  • Page 36 GERMANY UNITED ARAB EMIRATES MTL Instruments GmbH, Cooper Industries/Eaton Corporation Heinrich-Hertz-Str. 12, 50170 Kerpen, Germany Office 205/206, 2nd Floor SJ Towers, off. Old Airport Road, Tel: + 49 (0)22 73 98 12 - 0 Fax: + 49 (0)22 73 98 12 - 2 00 Abu Dhabi, United Arab Emirates E-mail: mtlgmbh@eaton.com...

This manual is also suitable for:

Hmx64Mtl4854Hcu16xHtp-sc16x

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