hart interfcae solns
TRANSCRIPT
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ELCON INSTRUMENTSI/O I n t e r f a ce, I n t r i n s i c S a f e t y an d S o l u t i o n s
a Pepperl+Fuchs group company
http://www.elconinstruments.com/http://www.elconinstruments.com/http://www.pepperl-fuchs.com/http://www.pepperl-fuchs.com/http://www.elconinstruments.com/http://www.his.elconinstruments.com/ -
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2
IN DEX
ABOUT US 3
INTRODUCTION TO P.A.M. (PLAN T ASSET MAN AGEMENT) 4-5
SMART INSTRUMENTATIO N AND PAM SYSTEMS 6
HIS (HART INTERFACE SOLUTIONS) - A BETTER WAY 7
HIS ARCHITECTURE 8-9
HIS SO LUTIO NS - GENERAL APPLICATIO N 10-11
HIS SOLUTIONS - INTRINSIC SAFETY APPLICATION 12
HIS SOLUTIONS - INTRINSIC SAFETY & REMOTE I/ O 13
MUX 2700 HART MULTIPLEXER 14-16
USING OPC WITH HIS 17
ACCESSORIES 18
MORE INFORMATION? 19
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ELCON INSTRUMENTSI/O I nt e r f a ce, I n t r i n s i c S a f e t y an d S o l u t i o n s
ABOUT US
Founded in Milan, Italy during 1970, Elcon Instruments has been the worldleader with innovative intrinsic safety Interface (IS) solutions for the process
industry.
Commencing 2001, Elcon Instruments will join the Pepperl+Fuchs Group of
companies with a mission to provide our customers with a diversified rangeof speciali sed Intrinsic Safety and general purpose I/ O Interfacingproducts. These products will be supported by the largest international sales
and technical support team in our market sector.
Innovative Solutions for the Process Control Industry.
This catalog highlights the range of HIS (HART Interface Solutions) whichhave been designed in partnership with the Fisher-Rosemount AMS group.
Elcon has designed a range of solutions utilising our unique HART Interfacehardware, to enable you to implement F-R market leading AMS (AssetManagement Solutions) software.
Our HIS brochure aims to provide you with all the knowledge necessary toallow you to implement a cost effective Plant Asset Management strategy,which will simplify and reduce the cost of running your plants assets.
If you cannot find a suitable solution for your application within ourbrochure, please visit our dedicated HIS website
www.his.elconinstruments.com to view the latest solutions or to find yournearest AMS expert.Alternatively e-mail us [email protected].
http://www.his.elconinstruments.com/mailto:%[email protected]:%[email protected]:%[email protected]://www.his.elconinstruments.com/ -
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IN TRODUCTION
SHD SHD
B
A
G
RS485
SHD+24
-
SHD+24
-
32Channel
Hart
Multip
lexer
MUX
2700
FAULTHARTTX
PWRON
SHD SHD
B
A
G
RS485
SHD+24
-
SHD+24
-
32Channel
Hart
Mul t
iplexer
MUX
2700
FAULTHARTTX
PWRON
Plant Wide LAN
DCS, ESD or F&G
I/ O Blocks
DCS + HMI Software
Connector to suit
DCS, ESD or F&G
I/ O cards
HIS
Field
Termination
Panels
HART Protocol Field Devices (32 per panel)
PAM systems provide live access to device information, and
streamline all activities related to calibration, configuration andmaintenance of instrumentation, while automatically recording
an instruments complete maintenance and diagnostic history.This information alone simplifies the task of regulatory compli-
ance, and saves hundreds of hours in preparation time.
In all industrial plants significant resources are dedicated to the
maintenance of cri tical plant assets. To reduce and contain thecost of plant maintenance, Plant Asset Management (PAM) sys-
tems are instrumental in improving both process efficiency andresource utilization. The savings obtained by implementing an
asset management strategy, increases plant availability and
contribute directly to improving the bottom line.
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Model
2116/HAT/
FR-
A0-HART-01
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
CH1
CH2
2000
FAULTSTATUS
PWR
ON
32 ChannelHart
Multiplexer
MUX
2700
FAULT HARTTX
SHD SHD
B
A
G
RS485
SHD+24
-
SHD+24
-
32
Channel
Hart
Multiplexer
MUX
2700
FAULTHARTTX
PWRON
PAM SYSTEMAsset Management Software
Standard 4-20 mA connection for Control Signals
Multidrop RS485 HART Communications
Connector to suit
DCS, ESD or F&G
I/ O cards
Intrinsic Safety (Exi) Soultion
HART Signals from Hazardous Area
P.A.M . (PLAN T ASSET M AN AGEM EN T)
Asset Management Solutions (AMS) from Fisher-Rosemount, is
the leader PAM systems for instrumentation in the market today.AMS requires connectivity to devices in the field in order tocommunicate live with device and perform maintenance and
diagnostic functions. The HART Interface Solution (HIS) family ofsolutions from Elcon, provides the most sophisticated, elegant
and modular means of connecting a PAM system to HARTinstrumentation in the field.
A PAM system can be implemented as a stand alone system or
in conjunction with a distributed control system (DCS).Regardless of the type and size of the installation, Elcon has asolution. In fact, we have a solution for virtually all DCSs in the
market today, and hundreds of successful installations world-wide.
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SMART IN STRUMEN TATION AN D PAM SYSTEMS
Simultaneous Analog and Digital Communication
Because the average value of the FSK signal is always zero,
the 4-20 mA Analog signal is not affected.The digital communication signal has a response time of
approximately 2-3 data updates per second withoutinterrupting the analog signal. Minimum loop impedance of230 Ohm is required for communication.
HART Field Device Features
W hilst new emerging all dig ital communications such as
Foundation Fieldbus and Profibus are starting to gain someacceptance, HART allows users to get many of the benefits ofdigital communications whilst still maintaining traditional
Analog wiring and control architecture.
HART offers:
Digital CapabilityAccess to all instrument parameters and diagnostics.Supports multivariable instruments.
On-line device status.
Analog Compatibility
Simultaneous analog and digital communications.Compatible with existing 4-20 mA equipment and wiring.
InteroperabilityFully open defacto standard.
Common command and data structure.Enhanced by Device Description Language.
AvailabilityField proven technology with more than 5,000,000 installations.Large and growing selection of products.
Used by more smart instruments than any other in the industry.
For more information please visit the HART Foundation on
www.hartcomm.org
The Process Control Industrys standarization on the HART
communications protocol for field devices has created a marketfor HART based software and hardware. Attracted by the
opportunity most manufacturers have created a wide range ofproducts to serve this industry. Routine maintenance is a very
inefficient way of managing plant assets because it tends toignore the current operating condition of the equipment. In many
cases perfectly functioning equipment is repaired because theschedule dictates a repair, while in other cases maintenance of
the equipment is ignored, thus compromising availability.
An inherent requirement of optimizing plant utilization is theavailability of real-time monitoring data about the equipment.
The data is used to implement predictive and proactivemaintenance programs that rely on the instrumentation to provide
self-diagnostics.
These programs eliminate the need for routine maintenance as, in
effect, field equipment can announce when it needs attention.
Evidence of this is given by the recent releases of PAM software
from major control system suppliers.
Using an asset management software systems coupled with HIShardware, maintenance or control room staff can continuallymonitor devices immediately detect and identify problems with
field equipment. All of this adds up to significant savings asproblems are intercepted before they cause major plant upsets.
In the area of device diagnostics, the PAM system via HIS can
access or exercise the diagnostics embedded in the HARTdevices. This allows engineering staff to focus their valuable time
on problem instruments, wi th no time wasted walking out to themarshalling cabinet or to the field.
HART Protocol
Introduction
HART is an acronym for Hig hwayAddressable Remote Transducer.
The HART protocol makes use of the Bell202 Frequency Shift Keying (FSK)
standard to superimpose digital signalsat a low level on top of the 4-20 mA.
This enables two way communications totake place and makes it possible for
additional information beyond just the normalprocess variable to be communicated to/ from a smart field
instrument.The HART protocol communicates without interrupting the
4-20 mA signal and allows a host application (master) to gettwo or more digital updates per second from a field device.
HART has been a protocol adopted by the majority of the
major manufacturers of process control field equipment.It is an open standard that is administered by the HART
Communications Foundation.
As the digital FSK signal is phase continuous, there is no
interference with the 4-20 mA signal.The relative simplicity of the HART protocol makes it easy for
both end users and suppliers to gain experience and benefitfrom the enhanced two-way communication capability of
smart field instruments using this technology.
The digital signal is made up of two frequencies - 1,200 Hz
and 2,200 Hz representing bits 1 and 0, respectively.
WEVE GOT
ABILITY
FIELD COMM UNICATION S PROTOCOL
Sine waves of these two frequencies are superimposed on the
direct current (dc) analog signal cables to providesimultaneous analog and digital communications.
Fig. 1
20 mA
4 mA
Time
Note: Drawing not to scale.
Analog
Signal
Digital
Signal
1 00
0
0
11
11
HART Signal superimposed on 4-20 mA
http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/http://www.hartcomm.org/ -
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HIS (HART Interface Solutions) - A BETTER WAY
Traditional Connection with HART Field Devices
The illustration in Figure 2 below shows the typical approach
connecting with a HART field device using HHC (Hand HeldCommunicator).The HHC can be viewed as a simplified PAM component as it
provides diagnostic information to a user, however its limited
in usefulness for the following reasons;
Only one instrument at a time can be accessed and
communicated with.
Valuable diagnostics and maintenance informationcannot be shared easily and in real time with other users.
New physical connection required for each field deviceto be interrogated.
HIS Benefits
Control System IndependentIrrespective of the particular DCS, ESD or F&G systeminstalled in a plant, HIS provides an independent means ofconnecting field devices to a PAM system.
A Step to FieldbusHIS is an ideal way for a user to receive many of thebenefits available from digital Fieldbus communications
without losing the training and expertise invested in the4-20 mA infrastructure and wi thout having to upgrade theDCS to Fieldbus.
Pre-Packaged Solutions
Elcon have made available solutions for the most commonapplication scenarios including interfacing with field deviceslocated in Hazardous explosive environments such as found
in the Oil & Gas, Petrochemical, Pharmaceutical Industries,Glass and Food Industries.
Control IntegrityThe design of each component that makes up HIS packages
ensures that at no time will the use of HIS affect the integrityof the control system.
Integral HART Filtering & Integral Impedance Boosting
Some DCS or I/ O cards do not have adequate minimumimpedance (230 ), as specified by the HART standard toensure reliable HART communicati ons and/ or can be
adversely affected by the HART signal modulating theanalog current.Elcon have developed a filter which is placed in series withthat particular I/ O channel.
This filter allows the passing of low frequency 4-20 mA dccurrent, and can boost impedance to ensure reliable HART
signals.
As this is an issue only with a select number of DCS, ESD orF&G I/ O modules Elcon ensure that adequate filtering circuitis packaged in solutions designed for specific systems.
Cost EffectiveHIS solutions represent exceptional value. Installation costsare kept to a minimum due to the packaged approach taken
ensuring that the right solution fits the application.In addition when costs are analyzed on a per instrumentbasis HIS represents a very small percentage of the price of
that device.
Legend:Color = 4-20 mA SignalColor = HARTSignal
Typical HART Connection Using HHC Fig. 2
V1
V2
V3
+
V4
V5
+
LDS1
DS2
LDS2
DS1
V6
V7
V8
V9
V10
V11
V12
V13
V14
B13
B 1 A 1
A13
V15
V16
V17
V18
V19
B13
B1 A1
A13
B13
B1 A1
A13
V20
V21
V22
V23
V24
V25
V26
RSUP1
RSUP2
V27
31J4
31J3
31J2
31J1
V28
V29
V30
V31
V32
B13
B1 A1
A13
X4
M arshal l ingCabinet
Fie ld DCS Ca bine t
Field Mounted HARTTransmitters & Valves
Hand HeldCommunicator
I/ O Card Racks
FTP(Field Termination Panels)
HIS SolutionsTo put it simply, HIS is the Enabling Hardware used for the
implementation of a PAM (Plant Asset Management) system.It provides the physical layer connectivi ty between PAMsoftware and the assets to be managed by that software,
typically transmitters and valves, whilst still maintaining thecontrol connectivity (4-20 mA) between field devices andProcess Control Systems.
As HART is an open standard, users wishing to set up a PAMsystem are no longer tied to the standard proprietary offeringfrom their control system vendor.
HIS allows you to tie together Asset Managements Softwarefield devices and any DCS, PLC and F&G control system,even from different suppliers.
HIS hardware solutions allow a PC running PAM software to be
able to communicate with all HART field devices simultaneously24 hours a day, 7 days a week.
Elcon have developed a range of packaged hardware solutions
that combine all the necessary hardware required to achievethis connection in a simple and cost effective manner.
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HART IN TERFACE SOLUTION S
General Solutions
Integrated Control System Specific HIS Panels
Replacement of proprietary DCS, ESD or F&Gtermination panels.
Best & lowest cost solution.
Solutions for new or upgrade installations.
Fully integrated, eliminates redundant hardware.
Saves space and simplifies design.
The most cost effective, elegant and integrated
approach is shown in Fig. 3, where HISTerminati on Panel i s used as the field w ir ing
termination assembly.This integrated concept reduces wiring and frees
valuable control room space. The HIS panelincorporates the HART Multiplexer, contol system andfilters (if required), to allow di rect connection to the
I/ O cards using standard DCS vendor cable sets.
External HIS Panel - Parallel Connection
Using DCS, ESD or F&G termination panels andseparate external HIS panels.
Ideal for retrofitting existing installations.
Maintains all existing hardware and field
wiring.
The illustration in Fig. 4 shows typical scenario of
multiple field devices, connected to a DCS, ESD orF&G control System I/ O card via the Field wiring
Termination Panel wi th a parallel connection to aremote HIS Panel.
As all field signals are available at this onelocation this is an ideal point to link over to HISpanel, by simply wiring across the field
marshalling terminals, or by using special 1 In 2Out terminals.
HART filtering can be supplied with this solution.
External HIS Panel - Series Connection
Using DCS, ESD or F&G termination panels andseparate external HIS panel, but breaking into the
loop for a cleaner Series wiring solution.
Can replace marshalling terminals.
Cleaner installation.
As seen in Fig. 5, the existing wiring from field
devices to the Field wiring Termination Panel (FTP)is removed and wired through the HIS panel.Using this approach, the 4-20 mA signal connects
to the control system via a traditional hardwareconfiguration, while allowing a point of connection
for the HART Multiplexer.
HART filtering is not supported with this solution.
V1
V2
V3
+
V4
V5
+
LDS1
DS2
LDS2
DS1
V6
V7
V8
V9
V10
V11
V12
V13
V14
B13
B 1 A 1
A13
V15
V16
V17
V18
V19
B13
B1 A1
A13
B13
B1 A1
A13
V20
V21
V22
V23
V24
V25
V26
RSUP1
RSUP2
V27
31J4
31J3
31J2
31J1
V28
V29
V30
V31
V32
B13
B1 A1
A13
X4
Elcon HIS Panel
Field Mounted HART
Transmitters & Valves
G
A
B
G
A
B
RS-485
SH
D
SHD
32ChannelHart
Multiplexer
MUX
2700
FAULT HARTTX
PWR
ON
AMS Workstation
RS-485 toRS-232 converter
I/ O Card Racks
FTP(Field Termination Panels)
Fig. 4
32 ChannelHart
Multiplexer
MUX
2700
FAULT HARTTX
PWR
ON
Fie ld DCS Cabine tMa rshalling Cabinet
RS-485 toRS-232 converter
AMS Workstation
I/ O Card Racks
Elcon HIS Panel
Fig. 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
32
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
32
31
32 ChannelHart
Multiplexer
MUX
2700
FAULT HARTTX
PWR
ON
V1
V2
V3
+
V4
V5
+
LDS1
DS2
LDS2
DS1
V6
V7
V8
V9
V10
V11
V12
V13
V14
B13
B1 A1
A13
V15
V16
V17
V18
V19
B13
B1 A1
A13
B13
B1 A1
A13
V20
V21
V22
V23
V24
V25
V26
RSUP1
RSUP2
V27
31J4
31J3
31J2
31J1
V28
V29
V30
V31
V32
B13
B1 A1
A13
X4
Legend:
Color
= 4-20 mA Signal
Color = HART Signal
I/ O Card Racks
FTP(Field Termination Panels)
Field Mounted HARTTransmitters & Valves AMS Workstation
RS-485 toRS-232 converter
Elcon HIS Panel
Fig. 5
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0
HIS SOLUTION S
RS-485 toRS-232 converter
AMS Workstation
Field Mounted HARTTransmitters & Valves
Integrated Control System Specific HIS Panels Fig. 8
Fie ld DCS Ca bine t
I/ O Card Racks
Legend:
Color = 4-20 mA SignalColor = HART Signal
Foxboro
Yokogawa
Honeywell
Integrated Control System Specific HIS Panels
Replacement of Proprietary DCS, ESD or F&G Termination Panels.
Solutions for new or upgrade installations.
Simple to implement.
Most integrated solution and eliminates redundantDCS/ PLC hardware.
Saves space and simplifies design.
Lowest cost solution.
Solutions where a HIS panel replaces the standard FieldTermination Panel normally supplied by the DCS System vendor.
As seen in Fig . 8 below, Elcon HIS panels combine all thestandard features included in the proprietary panels along with
a position for the HART Multiplexer and adds HART filters (ifrequired).
This is by far the most cost effective and elegant HIS solution.
Example of existing Panels:
- ABB.
- Elsag Bailey.
- Foxboro.
- Honeywell.
- Siemens Moore Products.
- Triconex.
- YISS Yokogawa Safety System.
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HPSM/ 32/ MM-01 MiniMux (Single Mux) panel with field andcontrol system terminal connections.Suitable for series connection and patching to marshalling
terminals.
HPSM/ 32/ TB-02/ HF16 (or 32) Single Mux panel with either16 or 32 HART filters and terminals for field and controlsystem connection. Suitable for pass through or patching
to marshalling terminals.
HPMM/ 2108/ 64-HART-D Two position Mux panel with fourSub D connectors. Suitable for patching to marshalling
terminals.
External HIS Panel - Series ConnectionExternal HIS Panel - Parallel Connection
Fie ld DCS Ca bine t
Elcon HIS Panel
M arshal l ingCabinet
Field Mounted HARTTransmitters & Valves
AMS Workstation
RS-485 toRS-232 converter
FTA(Field Termination Assembly)
Field Mounted HARTTransmitters & Valves
RS-485 toRS-232 converter
Elcon HIS
Panel
Fie ld DCS Ca bine t
AMS Workstation
Fig. 10Fig. 9
I/ O Card Racks I/ O Card Racks
Legend:
Color
= 4-20 mA Signal
Color = HART Signal
GEN ERAL APPLICATIO N
HPSM/ 32/ MM-01
Ex ternal HIS Panels
Used in conjunction with proprietary DCS termination Panels
Ideal solution for retrofit installations.
Simple to implement.
Small footprint to add HART. Retains all existing DCS, ESD or F&G hardware.
The Illustrations below highlight the two most popular methods ofaccessing HART signals externally to the DCS FTP using thepopular HPSM/ 32/ MM-01 "MiniMux" Panel.
General purpose panels such as these are purely passivedevices that in no way affect the integrity of the 4-20mA controlsignal.
Connection to marshalling terminals (See Fig. 9).
Using either the existing terminals (with wiring in parallel) or forneater wiring "1 in 2 Out" terminals. Specific signal pairscontaining HART signals can be connected over to the
HPSM/ 32/ MM-01 via screw terminals.
Series connection (See Fig. 10).The HPSM/ 32 / MM -01 panel, is wired between the field
Signals and DCS FTP. This particular solution is also ideal forconnecting to PLC I/ O cards, as it provides a convenient fieldwiring termination point.
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HIS SOLUTION S - IN TRIN SIC SAFETY
Integral a nd Remote MUX Panels
Elcon HiD2000 Termination Panels with Intrinsic Safety Isolators.
Fully integrate Intrinsic Safety and HART Mux panels.
Replaces DCS, ESD or F&G field termination panels.
Solutions for new or upgrade installations Simple to implement
Saves space and simplifies design.
HiD2000 is an ideal solution for applications where field
devices with HART are located in a hazardous area andtherefore need to pass through I.S. Isolators.
This solution uses Elcon HiD2000 plug-in I.S. Isolator family with
either integral HART multiplexer position or HART connectors topatch over to a separate MultiMux HART panel.
Two options are available.
1. If -HART appears in the HiD2000 termination board
model number, then a position is available to plug on aMux 2700 directly on the I.S. termination board (see
Fig. 11).
2. If -H appears in the HiD2000 termination board model
number, then this I.S. termination board feature HARTconnectors which can be patched over to an externalHART panel like the MultiMux Model N o.
HPMM/ 64/ CONA-01 (see Fig. 12).
Note both models are available with either a standard Sub D
connector (Elcon standard boards) or with DCS/ PLC connectorsto plug directly to DCS, ESD or F&G system I/ O cards using
their standard system cabling.
I/ O Card Racks
RS-485 toRS-232
converter
Intrinsic Safety with Remote HIS PanelIntrinsic Safety with Integrated HIS & FTP
Fie ld DCS Ca bine t
Field Mounted HARTTransmitters & Valves
AMS Workstation
I/ O Card Racks
RS-485 toRS-232 converter
Fie ld DCS Ca bine t
Field Mounted HARTTransmitters & Valves
AMS Workstation
Remote MultiMUXHART Panel
Fig. 12Fig. 11
Legend:
Color = 4-20 mA SignalColor = HART Signal
Elcon Custom HIS FTP(Field TerminationPanel) with HiD2000 Intrinsic Safety
Patch Cable
Elcon Custom HIS FTP(Field TerminationPanel) with HiD2000 Intrinsic Safety
HiD2000 with
integrated MUX 2700
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Remote Fieldbus I/ O M ux Panels
HiD3000 Fieldbus Remote I/ O with integral Mux 2700.
Remote I/ O for Safe and Hazardous Area's.
Can accept signals from Zone 0,1 and 2.
Zone 2 mounting. Redundant Fieldbus gateway modules.
Fully integrate Intrinsic Safety and HART Mux panels.
Replaces DCS/ PLC I/ O cards.
Simple to implement.
Saves space and simplifies design.
HiD3000 Remote I/ O system can accept signals from a safe orhazardous area and converts these to industry standardFieldbuses output like Profibus, Modbus RTU using either a
single or dual (redundancy) Gateway Modules.
A position on the termination board is included to mount theMux2700.
Intrinsic Safety
3116/ HAT-2G/ SABUS-R-HART (16 module position panel).
3108/ HAT-2G/ SABUS-R-HART (8 module position panel).Both feature integral HART MUX 2700 position.Supplied with blue terminals for connecting hazardous
area field devices. Output is an industry standard Fieldbus(e.g. Profibus, Modbus RTU) which is wired direct to thecontral system Fieldbus communication card, which
eliminates control system FTP and I/ O cards.
General Application
3116/ FCT-2G/ SABUS-R-HART (16 module position panel).3108/ FCT-2G/ SABUS-R-HART (8 module position panel).
Both feature integral HART MUX 2700 position.Supplied with grey terminals for connecting field devices.
Output is an industry standard Fieldbus (e.g. Profibus,Modbus RTU) which is wired direct to the contral systemFieldbus communication card, which eliminates control
system FTP and I/ O cards.
HIS SOLUTION S - IN TRINSIC SAFETY AN D REM OTE I/ O
Intrinsic Safety and Remote I/ O System Fig. 13
Elcon Fieldbus I/ O with HART. HiD3000 replacesFTP(Field Termination Panel) and DCS I/ O
Fieldbus I/ O Card
RS-485to
RS-232converter
Fie ld DCS Ca bine t
Field Mounted HARTTransmitters & Valves
AMS Workstation
Legend:
Color = 4-20 mA SignalColor = HART SignalColor = Fieldbus Signal
Field/ ControlRoom Mounting
Hand HeldCommunicator
(on HART test jacks)
HiD3000 with
integrated MUX 2700
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4
32 channel input.
RS485 serial data connection.
Communicate with HARTTransmitters and HART I/ P
Valve positioners.
No complicated master/ slave configuration.
Low power consumption, compact solution.
Application
The Mux270 0 HART Multiplexer provides 32 signal channels forconnection to smart transmitters or control devices supporting digital
communication according to the HART standard.Alternatively up to 16 HART only (i.e. no 4-20mA signal) devices can beconnected to each channel in multidrop configuration.
Full three-port isolation is included and each input channel has dual-capacitor isolation for freedom of loop connection.
It acts as a gateway between a workstation - typically a PC with suitablePAM software - and the field instrumentation.
Each Mux2700 is networked simply by connecting the high-speed RS485
output in multi-drop configuration.The Mux2700 interrogates each field device, under the supervision of theworkstation, retrieving information for storage in its internal database,
which can then be accessed at ease.
Specifications
DCSupply
Current consumption: 28 mA at 24 V, typical, RS485 quiescent.Power dissipation: 0.7 W at 24 V.
Signal channels
N umber of channels: 3 2.Dc isolation: dual capacitor each channel.Common mode voltage: up to 30 V.
Differential mode clamping: 5.2 V (for transient or ac signals).Common mode clamping: 10 V (for transient or ac signals).Receive signal range: 0.12 Vpp < signal < 1.5 Vpp.Receive impedance: > 5000 ohms.Carrier detect level: signal > 0.12 Vpp, CD asserted.
signal < 0.08 Vpp, CD not asserted.Transmit amplitude: 200 load - 0.43 Vpp < signal < 0.49 Vpp.
50 0 load - 1.1 Vpp < signal < 1.2 Vpp.Device type: secondary device.Impedance level: Hi gh impedance device.Data li nk type: HART Primary or Secondary M aster.
Field multi-drop support: option available upon request.
Note: the Mux 2700 generally complies with the HART FSK PhysicalLayer Speci f icat ion Rev. 8.0 avai lable f rom the HARTCommunication Foundation. HART is a registered trademark of theHART Communication Foundation.
Galvanic Isolation Specifications
24 V supply/ Field channels: 1400 Vac, rms.
24 V supply / RS-485 serial port: 1400 Vac, rms.
RS-485 serial por t/ Field channels: 500 Vac, rms.
Serial Port
Line type: RS-485, differential pair plus ground.Line speed: 9600 or 19200 Baud, switch selectable.Line topology: multi-point, master-slave connection.Unit address: 1 to 31, switch selectable.
M UX 2700 HART M ULTIPLEXER
Selector SwitchesSW 1-SW 5: Unit slave address.SW 6-SW 7: Baud rate.SW 8: Test mode.
LED IndicatorsPower ON: green.HART transmission: yellow.Fault: red.
1 2 S 3 4 5 6 S 7 8 9 10 S11121314 S15161718 S19202122 S23242526 S27282930 S3132
1 2 S 3 4 5 6 S 7 8 9 10 S11121314 S15161718 S19202122 S23242526 S27282930 S3132
32Cha n
nel
Hart
Multiplexer
MUX
2700
FAULTHARTTX
PWRON
1 2 S 3 4 5 6 S 7 8 9 10 S11121314 S15161718 S19202122 S23242526 S27282930 S3132
1 2 S 3 4 5 6 S 7 8 9 10 S11121314 S15161718 S19202122 S23242526 S27282930 S3132
32Cha
nnel
Hart
Multiplexer
MUX
2700
FAULTHARTTX
PWRON
1 2 S 3 4 5 6 S 7 8 9 10 S11121314 S15161718 S19202122 S23242526 S27282930 S3132
1 2 S 3 4 5 6 S 7 8 9 10 S11121314 S15161718 S19202122 S23242526 S27282930 S3132
32Cha
nnel
Hart
Multiplexer
MUX
2700
FAULTHARTTX
PWRON
PC HostMaintenanceWorkstation
RS-485 toRS-232 converter
Multi-dropRS-485 network(up to 31 units)
Mux ConnectionsFig. 14
WEVEGOT
ABILITY
FIELDCOMMUNICATIONSPROTOCOL
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High Specification Front end Design
Two Decoupling Capacitors are provided, one for ecch signalconnection.Both + Ve (positive) & - Ve (negative) signal wires are therefore
decoupled from DC signal. Only the high frequency digitalHART protocol signal passes through to the internal Multiplexercircuitry.
Failure of any one capacitor from either a short circuit or opencircuit means that availability of 4-20 mA control signal will notbe affected.
No DC loading of 4-20 mA Control Signal.
No single point of failure.
High Noise Immunity.
The purpose of these capacitors is to block the DC signal
component present on each 4-20 mA external loop, avoidingboth a DC error induced on the loop and any undesirableground-loop.
The presence of a non-polarised capacitor in series with both the+ and the terminal of each channel is very convenient for avariety of reasons, as summarised in the following:
It is possible to sense the HART signal at di fferent DC voltage
levels on each channel, as often required when the same MUXinter faces both Transmitters and I/ P devices or in othermixed configurations.
It is not mandatory, to connect the + MUX terminal to the +side of the 4-20 mA current loop (in fact, the MUX inputterminals are basically not polarised).
As better explained on page 16, the MUX can tolerate one ormore short-failed input capacitors while still working properly,the probability of loop interference is also very low for a wide
range of internal MUX faults.
The MUX input isolation was designed to allow the highestflexibility in connecting the channels to sense the HART signal.
The max 30 Vdc input voltage (specified between all terminals,both belonging to the same channel or not) makes it possible toconnect any MUX terminal to whatever voltage level can be
derived from a 24 Vdc supply, +20% tolerance included.
DESIGN FEATURES
Self Contained Architecture
Each Multiplexer module is a stand alone device containing allnecessary hardware to communicate with up to 32 HARTprotocol enabled Field Devices and a host PC via RS485 (see
Fig. 14).
Fast Polling. One module design.
RS485 di rect from module.
No communications bottleneck.
Ideal for valve diagnostics.
Wide Software Compatibility
Fully compatible with F-R AMS (Ver 5.0 is also an OPC server),ValveLink, and Cornerstone.Additional compatability extends to HART OPC server softwareavailable from HCF (HART Communication Foundation).Allowing users to write dedicated applications for their specificneeds.Fully tested, by a ll key PAM vendors. Reliable support &upgrade path through strong F-R Partnership.
Three-port Isolation
The three-port isolation structure of the MUX2700 is depicted inFig. 16 below. As you can see, both the 24 V supply input andthe RS-485 serial interface are isolated from the HART section,that is to say, from the HART signals on the field devices.
This is full galvanic isolation, implemented either by transformeror by optocoupler.
ELCON INSTRUMENTSI /O I n t e r f ac e , I n t r i ns i c S a f e t y a n d S o l u ti o n s
RS-485INTERFACE
OPTO
ISOLATOR
HART
MODEM
MUX
A
CPU
A A31
B A30
A32
C32
C1
B32
B1
0.68 F
2.2 F
0.68 F
2.2 F
CH 1
CH 2
A1
A3
24 V
A4, A5, A6
SCREEN
POWERSUPPLYUNIT
DCSupplyBus
+
RS485DataBus
F
Mux.
&
HART
Ch. 2
Ch. 1
Ch. 32
RS485I/F
~=
=
~=
~
Mux Three Port IsolationFig. 16Mux Block DiagramFig. 15
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6
What is OPC?
The OPC Specification is a non-proprietary
technical specification that defines a set of stan-dard interfaces based upon Microsofts
OLE/ COM technology. The application of theOPC standard interface makes possible inter-
operabi lity between automation/ control applications, field sys-tems/ devices and business/ office applications.
Traditionally, each software or application developer was re-quired to write a custom interface, or driver, to exchange data
with hardware field devices. OPC eliminates this requirement bydefining a common, high performance interface that permits this
work to be done once, and then easily reused by any standardor custom software application. This means that a software ap-plication designer can concentrate on the core objective, as all
the housekeeping functions are provided by OPC.
OPC & HIS
In a HART environment this means that the field dynamic device
data once only available within the HART host applications localenvionment (if the host application is also an OPC server) can
now be made available to any OPC compliant application.
What isan OPC Server?
OPC Server is a software application that resides on a PC. It pro-vides the connectivity between the HIS serial network and any
client OPC application. Using an OPC Server connected to an El-con HIS package
HART informationcan now be distrib-
uted to any OPCcompliant client soft-
ware located any-where across an en-
terprise's network in-frastructure.
OPC server soft-ware is included asan optional module
within the Fisher-Rosemount' s Asset
Management Solu-tions (AMS) V. 5.0
software or avail-able from the HART
Communications
Foundation as a standalone application package.HART OPC Server enables
1. SCADA / HMI software connectivity.2. Ethernet Connectivity.3. Custom Applications.
SCADA / HMI software connectivity
The primary benefit of using an OPC Server such as AMS withElcon HIS products, is the ability to share device information from
HART instruments with other software applications. Most popularSCADA or MMI/ HMI software are now OPC compliant and
therefore are able to communicate with the HART OPC Serverand individually talk with any HART field device on the plant for
reporting, trending, graphing etc.
Ethernet Connectivity
Once HART data is passed to an OPC Server it can then be
made available via an enterprises LAN or Wan network usingEthernet. Information can also be made accessed via the Internet
or a companys extranet infrastructure. This for example meansthat a instrument expert located at the factory in the USA can
look at diagnostics information on a particular instrument in hiscustomers plant locat-
ed on the other side ofthe world.
Powerful Custom
ApplicationsPerhaps the most pow-
erful feature is the po-tential for a user or sys-
tem integrator to quicklybe able to design a cus-
tom application to per-form a specific function.
For example field com-missioning tools can bedesigned as a client ap-
plication that allow mul-tiple field devices from
a specific area in aplant to be locked at certain values, all at the same time, so as to test
out a DCS or ESD system's correct operation. Such applications cansave time and money especially at commissioning and start up phas-
es of a new project. A similar task using conventional methods wouldinvolve significantly more time and money. Elcon can advise on de-
signing a custom application to meet your specific needs.
What is Available from the HART Device Using OPC HART Host?
Each HART device has a wealth of information that can be clas-sified as Device Common and Device Specific. Most control sys-
tems can only access one piece of this information, usually theprimary variable via 4-20 mA. OPC allows the full potential of aHART devices functionality to be realized especially the new bred
of multivariable instruments, independently of the control system.Listed below is a sampling of what information is available any
HART field Device to an OPC server;
Typical HART data items available via OPC
Digital Proces Data
Primary Variable (PV); PV Units
Secondary Variable (SV); SV Units
Tertiary Variable (TV); TV UnitsQuaternary Variable (QV); QV Units
PV Damping Time
PV Upper Sensor Limit
PV Lower Sensor Limit
PV Minimum Span
4-20 mA Data
Loop Current (mA)
Percent Range
Upper Range Value (Span)
Lower Range Value (Zero)
Device Information
Manufacturer Code
Device Code
Tag
Descriptor
Message
Device Status
Device Malfunction
More Status Available
Configuration Changed
PV Out of Limits
Non-PV Out of Limits
Loop Current Fixed
Loop Current Saturated
1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 1 3 2 3 1
1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 1 3 2 3 1
3 2 Ch a nne l
Ha rt
Mul t i pl e xe r
MUX
2 7 0 0
FA U LTH AR TTX
PWR
ON
HARTHOST I/ O SystemsModem
Multiplexers
OPC Server
SCADA
TrendingMIS/ MRP
SPC/ SQC
Web Server
Device Setup
Valve Diagnostics
Instrument Management
Field Device Manufacturing
HART - Pass-Trough
OPCServer
HART Server Fig. 17
PC Network
PV; PV Units
OPC Server /HART Host
Fig. 18
OPC Client
HART Host
Subscribe:
PV; PV Units
Note: Contact instruments device vendors for specific details.
OPC SERVER SOFTWARE
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ELCON INSTRUMENTS
Short Circuit Failure of OneDecoupling CapShort Circuit fai lure of one capacitordoes not effect the loop operation andthe HART signal is fully operational.
ELCON INSTRUMENTS
ELCON INSTRUMENTS
0 V
PowerSupply
24 Vdc
CH 1 CH 2 CH 3
CH 2
CH 1
CH 32 ~=
=
~=
~
F
Mux.
&
HART
RS485
I/F
+
CH 2
CH 1
CH 32 ~=
=
~=
~
F
Mux.
&
HART
RS485
I/F
+
CH 2
CH 1
CH 32
Open Circuit Failureof One Decoupling CapOpen Circuit failure of one capacitordoes not effect the loop operation andthe HART signal i s fully operational.
Typical DCS Termination
Assembly Panel
To DCS I/ O Card
Normal Operation EachUnder normal operation, the 4-20 mA control signalis protected by the in line capacitors which ensure
that no DC loading is placed on the loop. Both the4-20 mA and HART communication signal isoperational.
~=
=
~=
~
Mux Connections Fig. 19
F
Mux.
&
HART
RS485
I/F
+
M UX 2700 HART M ULTIPLEXER
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8
Power Supplies
Model No.: PS1550 & PS2500
Each HIS package requires a nominal 24Vdc supply to power
the Mux2700. However if a integrated Control System specificHIS solution is required, then this will also need to supply power
to the field device, placing a heavy burden on the power supplyemployed. Therefore Elcon have available various high integrity
power supply solutions, offering modular redundancy and highavailability.
For further details consult our PS-Range brochure or websitewww.elconinstruments.com.
PS1550
PS2500
MUX ADAPT27/ 17
1700 HHT
RS485/ 232 Converter
Model No.: Westermo MA-44
PC's do not normally include a RS485 port, therefore it isrecommended to use an external module to convert theRS48 5 signa l from each of the MUX270 0 modules toRS232.For this function Elcon recommends the Westermo MA-44.
Up to 31 MUX2700s can be connected on a maximum of1200 m of cable to each PC Serial Port.
For additional information refer to the Westermo websitewww.westermo.se
Adapters
Model No.: MUX ADAPT 27/ 17
PCB adapter to use the new Model MUX2700 on older styleMUX1700 termination boards.
Model No.: 1700 HHT & 2700 HHT
PCB Adapter used for trouble shooting single HART loops.The 1700HHT & 2700HHT plugs onto the termination board in placeof the MUX and provides access to all 32 HART signals via test jacksfor HHC hook-up.
ACCESSORIES
http://www.elconinstruments.com/http://www.westermo.se/http://www.elconinstruments.com/http://www.westermo.se/ -
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MORE INFORMATION?
his.elconinstruments.com
w w w
http://www.his.elconinstruments.com/mailto:[email protected]://www.his.elconinstruments.com/http://www.his.elconinstruments.com/http://www.his.elconinstruments.com/mailto:[email protected] -
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