MTL4840 HART maintenance system Instruction Manual INM4840
Contents CONTENTS Page PAGE 1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 2.1 General purpose or IS? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.
MTL4840 HART maintenance system INM4840-5 Nov 2007 Figure 1.1 - BPHM64 HART backplane 1. manage up to sixteen of the MTL4842 modules, making a possible total of 256 HART devices per MTL4841 module. INTRODUCTION This instruction manual describes the procedures for installing, connecting, checking and maintaining the MTL4840 HART® maintenance system, which is a simple interface between smart devices in the field and HART instrument management software running on a PC.
Hazardous area Safe area Workstation PC running instrument management software Up to 7936 * HART® devices RS232 Process control system eg DCS, PLC RS232/485 convertor RS485 To up to 31 MTL4841 communications modules 1 2 3 31 MTL4841 communications modules 1–16 1–16 P MTL4046P 1–16 16 HART 3 HART HART 2 HART 1 MTL4842 HART interface modules I 1–16 Each MTL4841 handles up to 16 MTL4842 HART interface modules* 4/20mA + HART signals MTL4041 B 1–16 1–16 Each MTL4842 handles up to 16 HAR
Various solutions are available to suit individual DCS types and a listing of the currently available connection units and backplanes is given in Appendix A. The HART signals, for routing to the maintenance system, are derived from those passing through the connection unit. The connection unit method is used for field devices in non-hazardous areas. 2.3 The second method of getting the HART signals for the maintenance system is to pick them off the backplane (Figure 2.
BPHM64 PWR HART Tx2+ Ch2+ Ch2- Tx1+ Tx1+ Ch1+ Ch1- FIELD 2 Ch1+ BPHM64 SYSTEM Ch1HART INTERFACE Ch2+ Ch2MTL4842 2 4 4 MTL4842 MTL4842 MTL4842 3 3 6 6 5 5 8 8 7 7 HCU16 10 10 9 9 DCS terminals To additional 30 (max.) MTL4841 comms.
4 INSTALLATION 4.1 4.2.3 System overview See Figures 2.1 and 4.1. 4.2 BPHM64 HART backplane For medium to large scale installations, the BPHM64 HART backplane is the method of choice to handle the HART maintenance signals passing to and from the field devices. Connect the ribbon cables to the appropriate connector for the corresponding MTL4842 module. 4.2.4 DC supply in P1 0V PWR2 P2 P3 PWR 1 2 HART signal connections 206 mm P5 MTL4842 MTL4842 See Section 4.
+24 or Tx+ from DCS 2 wire transmitter input Tx1 + Ch1 + Ch1 Tx Tx1 + Ch1 + Ch1 DCS input + DCS input +24 or Tx+ from DCS 3/4 wire transmitter input Tx1 + Ch1 + Ch1 Tx Tx1 + Ch1 + Ch1 DCS input + DCS input Field terminals BPHM64 HART INTERFACE System terminals Tx1 + Ch1 + Ch1 Tx1 + Ch1 + Ch1 Tx2 + Ch2 + Ch2 Tx2 + Ch2 + Ch2 Tx3 + Ch3 + Ch3 Tx3 + Ch3 + Ch3 Tx4 + Ch4 + Ch4 Tx4 + Ch4 + Ch4 Tx5 + Ch5 + Ch5 Tx5 + Ch5 + Ch5 Tx6 + Ch6 + Ch6 Tx6 + Ch6 + Ch6
Field terminals BPHM64 HART INTERFACE System terminals P1 Smart positioner Smart positioner + 1 2 Filter 1 + 3 4 Filter 2 1 + 2 3 + 4 TB1 Smart positioner Smart positioner 5 6 Filter 3 7 8 Filter 4 1 + Filter 5 2 5 + 6 Filter 6 4 + 8 1 3 4 TB2 TB6 5 Filter 7 6 5 6 7 Filter 8 8 7 8 1 Filter 9 1 2 2 3 Filter 3 10 4 4 TB7 TB3 5 Filter 5 11 6 6 7 Filter 7 12 8 8 1 Filter 1 13 2 2 3 Filter 14 4 3 4 TB4 TB8
4.6 FIELD The HMU range of connection units is designed for applications where a smaller footprint is required or where only a small number of HART signals need to be connected. They are based on a HART control board combined with one or two of the HCU16 or HCU16AO boards. Consult Figures 4.5 and 4.6 for field and system connections to these backplanes.
1 3 5 7 P2 Tx2+ Ch2+ Ch2- FIELD 125 mm Tx1+ Ch1+ BPHM64 SYSTEM Ch1HART INTERFACE Tx2+ Ch2+ Ch2- 1 3 5 7 2 4 6 8 10 9 12 11 14 13 16 15 2 4 6 8 1 3 5 7 9 10 11 12 13 14 P1 15 16 1 3 5 7 Tx2+ Ch2+ Ch2- P2 Tx2+ Ch2+ Ch2- Tx1+ Ch1+ Ch1- Tx1+ Ch1+ Ch1- FIELD FIELD Tx1+ Ch1+ BPHM64 SYSTEM Ch1HART INTERFACE HCU16 Tx1+ Ch1+ BPHM64 SYSTEM Ch1HART INTERFACE Tx2+ Ch2+ Ch2- Tx2+ Ch2+ Ch2- 1 3 5 7 2 4 6 8 10 9 12 11 14 13 16 15 1 3 5 7 2 4 6 8 P1
4.7 BPMH and BPSH Backplanes 4.8 Backplane mounting 4.7.1 BPMH16 and BPSH16 backplanes 4.8.1 Using mounting plate VMPH16 • 16 x MTL4041A/B/P isolators, 16 x MTL4046/C/P isolators, or a mixture of these isolators Attach the backplane to the VMPH16 mounting plate using the screws provided. Use mounting centres ‘D’ - shown in figure 4.11 - to attach plate to required surface or structure. • 1 x MTL4841 communications module 4.8.2. • 1 x MTL4842 HART interface module.
BPSH16 B BPMH16 B C C 15 A 12 112 13 13 9 314 10 10 11 11 12 112 314 9 A 8 8 A 6 5 A 3 3 112 5 A 19 B 4 28.5 28.5 BPSH16 BPMH16 C 19 B 132 A 1 2 A 1 2 4 112 6 7 A 7 A A 14 14 15 16 A 16 A C 132 170 170 25 BPSH16-32 122 VMPH16 A A A A 14 12 11 13 MTL4044 MTL4044 MTL4044 9 331 347 10 MTL4044 MTL4044 8 MTL4044 7 MTL4044 6 5 MTL4044 4 MTL4044 3 MTL4044 2 MTL4044 1 MTL4044 28.
4.9 4.8.3 DIN-rail mounting – with DIN-rail mounting kit DMK01 & mounting plate VMPH16 DIN-rail mounting kits (type DMK01 or DMK04) are available for this purpose. DMK01 contains 40 sets of the components shown in Figure 4.12, while DMK04 contains 4 sets of these components. Backplanes – identification and tagging A rectangular area for identification is provided on each backplane see Figure 4.11. In addition, tagging strips are available (TSK18) for mounting over the backplane safe-area connections.
4.11 Backplanes – connections 4/20mA MTL4041B/ MTL4041P Power supply and data connections are also made to the backplanes. See section 4.5.3 for power connections and 4.5.4 for data connections. 4.11.1 Hazardous area MTL4041A only Safe-area circuit connections are made to the backplane in one of two ways – either by multiway connectors (BPMH16) or by screw clamp terminals (BPSH16 & BPSH16-32). The following sections explain the methods for connecting these two types.
4.11.2 BPSH16 & BPSH16-32 - screw-clamp terminals In the case of the screw-clamp terminal backplanes, each module position is provided with a 2-way split-level terminal block for safe area signals. Primary power supply + + _ _ Secondary power supply The connection procedure is:Check pin assignments for the MTL4041B/P as per Figure 4.17. 1 2 PWR 0 V PWR 0 V Check pin assignments for the MTL4046P as Figure 4.
4.12 Cabling recommendations 4.12.1 HART signals cable Biasing When no communication is taking place, the bus is in an undefined, floating state and, consequently, noise on the bus may be decoded as real characters. Well-written software should discard most of these characters, but the system may be further protected by biasing the bus to a known state and thereby preventing the reception of ‘false’ characters.
Table 5.1 - MTL4841 address switch setting options 5 MODULES 5.1 MTL4841 and 4842 – installation Switch Number 1 ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON Place the MTL4841 over its connector, in the position marked on the backplane. Ensure that the module is not tilted, which could damage the connector pins, then press it carefully to the backplane. All safe-area circuit and power connections are made through this connector.
5.3.2 MTL4842 – setting and configuration Up to 16 MTL4842 HART interface modules can be connected to a single MTL4841 communications module. Each MTL4842 must be configured with a unique address by using the four switches located on the top of the module. Table 5.2 shows the switch settings for the individual addresses. 5.3.3 The MTL4840 system is controlled by a host computer running instrument management software.
6.3 Routine maintenance It is advisable to check the general condition of the installation occasionally to make sure that no damage or deterioration has occurred. The following should be checked at least once every two years (more frequently for particularly harsh environments): 7 SOFTWARE CONNECTIVITY 7.1 Introduction The MTL HART system provides access from a PC to the HART field devices for configuration, diagnostics and the monitoring of device performance.
APPENDIX A In addition to a comprehensive range of generic MTL4000 Series backplanes, MTL has also developed a very wide range of custom backplanes to meet the requirements of its customers. The following listing is provided to illustrate the breadth of generic and custom types created to meet the needs for individual system manufacturers and their DCS models. The listing also includes a range of HART connection boards, explained earlier, to suit both general and custom requirements.
BPM32-MPSAM Siemens Moore BPSN-08-AI Simrad Norge BPSN-16-AIH Simrad Norge BPM16-2AI3700 Triconex BPM16-AI3700-L Triconex BPM16-AI3700-R Triconex BPM32-AIH3700 Triconex BPM32-AIH3704E Triconex HCU3700/ISOREP Triconex BPYOK-AI Yokogawa Centum CS BPYOK-AI(16) Yokogawa Centum CS BPYOK-AIO Yokogawa Centum CS BPYOK-MA Yokogawa Centum CS BPYOK-MA(16) Yokogawa Centum CS BPY-MA Yokogawa Centum CS AMC80HCU Yokogawa Centum CS AMM11HCU Yokogawa Centum CS BPYR3-AAI135/835 Yokogawa Cen
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MTL Instruments Pty Limited 1/30 Canvale Road Canning Vale Perth, WA 6155 Australia Tel: +61 (0)8 9455 2994 Fax: +61 (0)8 9455 2805 E-mail: enquiries@mtlaus.com.au MTL Canada Safety Instrumentation #102, 4249 97 Street Edmonton, Alberta Canada T6E 5Y7 Tel: +1 780 485 3132 Fax: +1 780 485 3122 E-mail: cinfo@mtlnh.com MTL Instruments China Co. Ltd. Room 1002A, The Gateway No 10 Yabao Road, Chaoyang District Beijing 100020 China Tel: +86 010 8562 5718/5720/5721 Fax: +86 010 8562 5725 E-mail: bjsales@mtl-inst.
