Fieldbus Overview
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 2
Agenda
 Basic Concepts
 Interoperability
 Benefits from Fieldbus Installations
 Availability of Fieldbus Devices
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 3
Foundation Fieldbus is the basis for modern
control and automation products.
 Advanced functions added to field
instruments
 Expand view for the operator
 Enable migration of functions the field
 Reduce wiring and installation costs
 Reduce I/O equipment by one-half or
more
 Provide increased information flow to
enable automation of engineering,
maintenance, and support functions
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 4
What is Fieldbus?
Definition...
Control room
operator stations
Control systems
(DCS or PLC)
P
T
L
F
Fieldbus
A digital, two-way, multi-drop communication
link among intelligent field devices and
automation systems.
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 5
DCS
4 - 20 mA
Proprietary Bus
4 -20 mA 4 -20 mA
A Typical Plant Today
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 6
Today's Communications
Controller PLC
GW PLC
Computer
GW
Remote I/O
cards & terms
Remote I/O
cards & terms
Two wire
Transmitters &
Control Elements
PLC - DCS
PLC
PLC
Remote I/O
M
Simple
Sensors &
Switches
Motor
Drives
Programmable
Controller
(PLC) Networks
Distributed
Control
System
Network
Electrical Signals
4-20mA or
proprietary
digital
Proprietary
Busses
Proprietary
Interfaces
Many different types of proprietary digital communications-
Limited information from the field available to the control room.
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 7
DCS
A Plant with Fieldbus
High Speed Fieldbus (100 Mbits/s)*
Low Speed Fieldbus (31.25 Kbits/s)
*Fast Ethernet
Maintenance
A Plant with Fieldbus
Interoperable devices
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 8
Fieldbus Cable Types
Cable Type and Description Size Length
 Type A (New) Shielded, twisted-pair
– H1: 31.25 Kbps #18 AWG 1900* m
– H2: 1.0 Mbps #22 AWG 750* m
– H2: 2.5 Mbps #22 AWG 500* m
 Type B (Existing) Multi-twisted-pair, w/shield
– H1: 31.25 Kbps #22 AWG 1200* m
 Type C Multi-twisted-pair, w/o shield
– H1: 31.25 Kbps #26 AWG 400* m
 Type D Multi-core, w/o shield
– H1: 31.25 Kbps #16 AWG 200* m
* Spurs count in overall length
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 9
Fieldbus : more than just communication
DCS or
PLC
XMTR
4 -20 mA
MMI
TAG : FT-234A
VALUE : 456.5
UNIT : cuft/s
STATUS : Good, with
alarm at
400cuft/s not
acknowledged
XMTR
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 10
Freedom of Choice !
Allows digital instruments to be
connected onto a Fieldbus network and have
them communicate all available functionality
to each other and with the networked hosts.
TM
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 11
Function
Block(s)
Transducer
Block
Resource
Block
FOUNDATION™
fieldbus
FOUNDATION Fieldbus Blocks, Trends,
Alerts
Basic Components
µP
Plugged
Impulse
Line
Electronics
Diagnostics
Communication
Diagnostics
Trend
Alert
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 12
Automatic Address Assignment
 This feature allows fast and safe
commissioning of the Fieldbus Network!
 No dip switches, no pre-configuration.
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 13
Unique Information is Maintained by
Device
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 14
Standardized Function Block Application
Designed For Process Industry Requirements
AI PID AO
PIDAI
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 15
Fieldbus Function Blocks
 Discrete Input
 Discrete Output
 Analog input
 Analog Output
 PID, PI, I Control
 P, PD Control
 Control Selector
 Manual Loader
 Bias/Gain Station
 Ratio Station
Basic
 Pulse Input
 Complex Analog Output
 Complex Discrete Output
 Step Output PID
 Device Control
 Setpoint Ramp Generator
 Splitter
 Input Selector
 Signal Characterizer
 Lead Lag
 Deadtime
 Arithmetic
 Calculate
 Integrator(Totalizer)
 Timer
 Analog Alarm
 Discrete Alarm
 Analog Human Interface
 Discrete Human Interface
Advanced
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 16
AI
PID
AI
PID AO
CAS
IN
IN
SP
Product
Steam
TT100
TIC100
FT101
FIC101 FCV101
TIC100.OUT
Easy control strategy configuration
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 17
Communication Services and Deterministic
Scheduling For Time Critical Control
TT100.OUT
TIC100.OUT
FT101.OUT
FIC101.OUT
FIC101.
BCKCAL_OUT
FCV101.
BCKCAL_OUT
TT100.OUT
TIC100.OUT
Cyclic Acyclic
TT
FCV
FT
macro-cycle macro-cycle
FIC101.
BCKCAL_OUT
FT101.OUT
FIC101.OUT
FCV101.
BCKCAL_OUT
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 18
Standard Measurement and Control
Diagnostics Supported by Devices
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 19
Devices Provide Predictive Diagnostics
Provide Information On Life Expectancy and Performance
Degradation
Device Performance
Failure
Predictive Alarm
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 20
Predictive Maintenance Examples
 Transmitter generates an alert
when
 the probe tip degenerates
 the device has exceeded
factory maximum field
temperature usage
• Cycle Counter
• Valve Signature
• Dynamic Error Band
 O2 Sensor creates alert when the
sensor fouls
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 21
Classic I/O
H1
Other Buses
Other Buses
Event is Time Stamped At The Source!
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 22
Interoperability Allows...
 Devices from different manufacturers are able
to interact with each other without Host
interaction
– Control in the field works seamlessly
– Devices do not conflict with each other
 Host can read/write the resource and
transducer block parameters
 Device diagnostics may be accessed by the
host
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 23
Test System
Device Description Test Cases
Device Interoperability Testing at the
FOUNDATION
Test Function Block
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 24
Interoperability Is a Reality
Modern control systems support
Foundation Fieldbus devices from all
manufacturers
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 25
New Types of Fieldbus Devices May be
Easily Added
Device Descriptions may be
added in accordance with the
FOUNDATION standards.
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 26
A Device Is Registered by the Fieldbus
FOUNDATION after it passes these tests:
FOUNDATION™ fieldbus Physical Layer
Conformance Test Specification (FF-830)
Interoperability Test of Standard Function
Blocks, Resource Block and System/network
Management Functions
Device Description (DD) Interoperability Test
All Files necessary (Capabilities File) for the
device definition are included and appropriate.
Registered Devices
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 27
Types of Fieldbus Devices That Have
Been Registered
 Mass Meter
 Pressure Differential
 Pressure Absolute
 Valve Positioner
 Valve Actuator
 Rotary Valve Actuator
 Radar Level
 Mag Flow
 Digital Valve Controller(on/off)
 Digital Valve Controller
 pH/ORP
 pH
 Temperature
 Coriolis Mass Flow
 Nuclear Level Gauge
 Vortex Flow
 2-wire In Situ O2
 Conductivity
 Conductivity/Resistivity
 Continuous Gas Analyzer
 Gas Chromatograph
 Fieldbus to Current
 Fieldbus to Pressure
 Current to Fieldbus
 Recorder
 Fieldbus Controller
 Discrete I/O
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 28
Edmonton, Canada
Syncrude - Canada
Control System
– DeltaV
– Honeywell Scan
3000/TPS
Fieldbus Devices
– Rosemount
– Fisher Controls
– Valtek
– Yokogawa
– Honeywell
– Smar
– E + H
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 29
Royal Dutch Shell - Amsterdam
Shell - Amsterdam
Control System
– DeltaV
– Yokogawa Centum
– Honeywell Scan 3000
– Smar
Fieldbus Devices
– Fuji
– Yokogawa
– Fisher Controls
– Rosemount
– Honeywell
– Smar
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 30
Test Reports
Foundation Fieldbus
Interoperability
Test Report
Shell Research Center
Amsterdam
Peter Eigenrann
Bindert Douma
Fieldbus brings dramatic
savings in installation and
commissioning, but the real
value is seen during plant
operation...
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 32
Over 120,000 Foundation Fieldbus devices
in more than 4,000 installations
NumberofFieldbusProjects
0
1000
2000
3000
4000
O
ct-98
Jan-99
Apr-99
Jul-99
O
ct-99
Jan-00
Apr-00
Jul-00
O
ct-00
Jan-01
Apr-01
Jul-01
Source: Fieldbus Foundation
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 33
Driving Forces For Acceptance
 Saving in installation and commissioning of field
devices
 Greater access to device information
 Freedom of choice in device selection enabled by
Foundation Interoperability
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 34
Cost savings for first 64 wells versus
competitors’ solution:
• Engineering 336 vs. 480 KUSD
• Commissioning 14 vs. 86 KUSD
• Wiring 206 vs. 596 KUSD
Audited Savings 556 vs. 1162 KUSD
Other Reductions:
• Terminations 84%
• I/O Cards 93%
• Panel Space 70%
• Transmitters 28%
• Maintenance 50 - 80%
Savings at ARCO Alaska
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 35
Fieldbus Installation and
Commissioning
Category Conventional I/O Fieldbus Savings
Wiring 2 wires per device 16 devices per 2 wires 90%
Commissioning 2 - 4 hrs per device 5 min per device 96%
Space 75 loops per cabinet Eliminates 75% of
space
75%
Instrument
Engineering
3 hrs per device 1 hr per device 67%
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 36
Before
Courtesy: Cargill Corporation
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 37
After
Courtesy: Cargill Corporation
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 38
256 I/O
BEFORE
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 39
4,000
Fieldbus ‘I/O’
AFTER
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 40
Over 50 Registered Fieldbus Devices are
Available Today From 20 manufacturers
Fuji
[File Name or Event]
Emerson Confidential
27-Jun-01, Slide 41
Types of Fieldbus Devices That Have
Been Registered
 Mass Meter
 Pressure Differential
 Pressure Absolute
 Valve Positioner
 Valve Actuator
 Rotary Valve Actuator
 Radar Level
 Mag Flow
 Digital Valve Controller(on/off)
 Digital Valve Controller
 pH/ORP
 pH
 Temperature
 Coriolis Mass Flow
 Nuclear Level Gauge
 Vortex Flow
 2-wire In Situ O2
 Conductivity
 Conductivity/Resistivity
 Continuous Gas Analyzer
 Gas Chromatograph
 Fieldbus to Current
 Fieldbus to Pressure
 Current to Fieldbus
 Recorder
 Fieldbus Controller
 Discrete I/O
Note: See www.fieldbus.org for latest listing

Fieldbus Tutorial Part 1 - Fieldbus Overview

  • 1.
  • 2.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 2 Agenda  Basic Concepts  Interoperability  Benefits from Fieldbus Installations  Availability of Fieldbus Devices
  • 3.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 3 Foundation Fieldbus is the basis for modern control and automation products.  Advanced functions added to field instruments  Expand view for the operator  Enable migration of functions the field  Reduce wiring and installation costs  Reduce I/O equipment by one-half or more  Provide increased information flow to enable automation of engineering, maintenance, and support functions
  • 4.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 4 What is Fieldbus? Definition... Control room operator stations Control systems (DCS or PLC) P T L F Fieldbus A digital, two-way, multi-drop communication link among intelligent field devices and automation systems.
  • 5.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 5 DCS 4 - 20 mA Proprietary Bus 4 -20 mA 4 -20 mA A Typical Plant Today
  • 6.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 6 Today's Communications Controller PLC GW PLC Computer GW Remote I/O cards & terms Remote I/O cards & terms Two wire Transmitters & Control Elements PLC - DCS PLC PLC Remote I/O M Simple Sensors & Switches Motor Drives Programmable Controller (PLC) Networks Distributed Control System Network Electrical Signals 4-20mA or proprietary digital Proprietary Busses Proprietary Interfaces Many different types of proprietary digital communications- Limited information from the field available to the control room.
  • 7.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 7 DCS A Plant with Fieldbus High Speed Fieldbus (100 Mbits/s)* Low Speed Fieldbus (31.25 Kbits/s) *Fast Ethernet Maintenance A Plant with Fieldbus Interoperable devices
  • 8.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 8 Fieldbus Cable Types Cable Type and Description Size Length  Type A (New) Shielded, twisted-pair – H1: 31.25 Kbps #18 AWG 1900* m – H2: 1.0 Mbps #22 AWG 750* m – H2: 2.5 Mbps #22 AWG 500* m  Type B (Existing) Multi-twisted-pair, w/shield – H1: 31.25 Kbps #22 AWG 1200* m  Type C Multi-twisted-pair, w/o shield – H1: 31.25 Kbps #26 AWG 400* m  Type D Multi-core, w/o shield – H1: 31.25 Kbps #16 AWG 200* m * Spurs count in overall length
  • 9.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 9 Fieldbus : more than just communication DCS or PLC XMTR 4 -20 mA MMI TAG : FT-234A VALUE : 456.5 UNIT : cuft/s STATUS : Good, with alarm at 400cuft/s not acknowledged XMTR
  • 10.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 10 Freedom of Choice ! Allows digital instruments to be connected onto a Fieldbus network and have them communicate all available functionality to each other and with the networked hosts. TM
  • 11.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 11 Function Block(s) Transducer Block Resource Block FOUNDATION™ fieldbus FOUNDATION Fieldbus Blocks, Trends, Alerts Basic Components µP Plugged Impulse Line Electronics Diagnostics Communication Diagnostics Trend Alert
  • 12.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 12 Automatic Address Assignment  This feature allows fast and safe commissioning of the Fieldbus Network!  No dip switches, no pre-configuration.
  • 13.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 13 Unique Information is Maintained by Device
  • 14.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 14 Standardized Function Block Application Designed For Process Industry Requirements AI PID AO PIDAI
  • 15.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 15 Fieldbus Function Blocks  Discrete Input  Discrete Output  Analog input  Analog Output  PID, PI, I Control  P, PD Control  Control Selector  Manual Loader  Bias/Gain Station  Ratio Station Basic  Pulse Input  Complex Analog Output  Complex Discrete Output  Step Output PID  Device Control  Setpoint Ramp Generator  Splitter  Input Selector  Signal Characterizer  Lead Lag  Deadtime  Arithmetic  Calculate  Integrator(Totalizer)  Timer  Analog Alarm  Discrete Alarm  Analog Human Interface  Discrete Human Interface Advanced
  • 16.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 16 AI PID AI PID AO CAS IN IN SP Product Steam TT100 TIC100 FT101 FIC101 FCV101 TIC100.OUT Easy control strategy configuration
  • 17.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 17 Communication Services and Deterministic Scheduling For Time Critical Control TT100.OUT TIC100.OUT FT101.OUT FIC101.OUT FIC101. BCKCAL_OUT FCV101. BCKCAL_OUT TT100.OUT TIC100.OUT Cyclic Acyclic TT FCV FT macro-cycle macro-cycle FIC101. BCKCAL_OUT FT101.OUT FIC101.OUT FCV101. BCKCAL_OUT
  • 18.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 18 Standard Measurement and Control Diagnostics Supported by Devices
  • 19.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 19 Devices Provide Predictive Diagnostics Provide Information On Life Expectancy and Performance Degradation Device Performance Failure Predictive Alarm
  • 20.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 20 Predictive Maintenance Examples  Transmitter generates an alert when  the probe tip degenerates  the device has exceeded factory maximum field temperature usage • Cycle Counter • Valve Signature • Dynamic Error Band  O2 Sensor creates alert when the sensor fouls
  • 21.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 21 Classic I/O H1 Other Buses Other Buses Event is Time Stamped At The Source!
  • 22.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 22 Interoperability Allows...  Devices from different manufacturers are able to interact with each other without Host interaction – Control in the field works seamlessly – Devices do not conflict with each other  Host can read/write the resource and transducer block parameters  Device diagnostics may be accessed by the host
  • 23.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 23 Test System Device Description Test Cases Device Interoperability Testing at the FOUNDATION Test Function Block
  • 24.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 24 Interoperability Is a Reality Modern control systems support Foundation Fieldbus devices from all manufacturers
  • 25.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 25 New Types of Fieldbus Devices May be Easily Added Device Descriptions may be added in accordance with the FOUNDATION standards.
  • 26.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 26 A Device Is Registered by the Fieldbus FOUNDATION after it passes these tests: FOUNDATION™ fieldbus Physical Layer Conformance Test Specification (FF-830) Interoperability Test of Standard Function Blocks, Resource Block and System/network Management Functions Device Description (DD) Interoperability Test All Files necessary (Capabilities File) for the device definition are included and appropriate. Registered Devices
  • 27.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 27 Types of Fieldbus Devices That Have Been Registered  Mass Meter  Pressure Differential  Pressure Absolute  Valve Positioner  Valve Actuator  Rotary Valve Actuator  Radar Level  Mag Flow  Digital Valve Controller(on/off)  Digital Valve Controller  pH/ORP  pH  Temperature  Coriolis Mass Flow  Nuclear Level Gauge  Vortex Flow  2-wire In Situ O2  Conductivity  Conductivity/Resistivity  Continuous Gas Analyzer  Gas Chromatograph  Fieldbus to Current  Fieldbus to Pressure  Current to Fieldbus  Recorder  Fieldbus Controller  Discrete I/O
  • 28.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 28 Edmonton, Canada Syncrude - Canada Control System – DeltaV – Honeywell Scan 3000/TPS Fieldbus Devices – Rosemount – Fisher Controls – Valtek – Yokogawa – Honeywell – Smar – E + H
  • 29.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 29 Royal Dutch Shell - Amsterdam Shell - Amsterdam Control System – DeltaV – Yokogawa Centum – Honeywell Scan 3000 – Smar Fieldbus Devices – Fuji – Yokogawa – Fisher Controls – Rosemount – Honeywell – Smar
  • 30.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 30 Test Reports Foundation Fieldbus Interoperability Test Report Shell Research Center Amsterdam Peter Eigenrann Bindert Douma
  • 31.
    Fieldbus brings dramatic savingsin installation and commissioning, but the real value is seen during plant operation...
  • 32.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 32 Over 120,000 Foundation Fieldbus devices in more than 4,000 installations NumberofFieldbusProjects 0 1000 2000 3000 4000 O ct-98 Jan-99 Apr-99 Jul-99 O ct-99 Jan-00 Apr-00 Jul-00 O ct-00 Jan-01 Apr-01 Jul-01 Source: Fieldbus Foundation
  • 33.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 33 Driving Forces For Acceptance  Saving in installation and commissioning of field devices  Greater access to device information  Freedom of choice in device selection enabled by Foundation Interoperability
  • 34.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 34 Cost savings for first 64 wells versus competitors’ solution: • Engineering 336 vs. 480 KUSD • Commissioning 14 vs. 86 KUSD • Wiring 206 vs. 596 KUSD Audited Savings 556 vs. 1162 KUSD Other Reductions: • Terminations 84% • I/O Cards 93% • Panel Space 70% • Transmitters 28% • Maintenance 50 - 80% Savings at ARCO Alaska
  • 35.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 35 Fieldbus Installation and Commissioning Category Conventional I/O Fieldbus Savings Wiring 2 wires per device 16 devices per 2 wires 90% Commissioning 2 - 4 hrs per device 5 min per device 96% Space 75 loops per cabinet Eliminates 75% of space 75% Instrument Engineering 3 hrs per device 1 hr per device 67%
  • 36.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 36 Before Courtesy: Cargill Corporation
  • 37.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 37 After Courtesy: Cargill Corporation
  • 38.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 38 256 I/O BEFORE
  • 39.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 39 4,000 Fieldbus ‘I/O’ AFTER
  • 40.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 40 Over 50 Registered Fieldbus Devices are Available Today From 20 manufacturers Fuji
  • 41.
    [File Name orEvent] Emerson Confidential 27-Jun-01, Slide 41 Types of Fieldbus Devices That Have Been Registered  Mass Meter  Pressure Differential  Pressure Absolute  Valve Positioner  Valve Actuator  Rotary Valve Actuator  Radar Level  Mag Flow  Digital Valve Controller(on/off)  Digital Valve Controller  pH/ORP  pH  Temperature  Coriolis Mass Flow  Nuclear Level Gauge  Vortex Flow  2-wire In Situ O2  Conductivity  Conductivity/Resistivity  Continuous Gas Analyzer  Gas Chromatograph  Fieldbus to Current  Fieldbus to Pressure  Current to Fieldbus  Recorder  Fieldbus Controller  Discrete I/O Note: See www.fieldbus.org for latest listing