Post on 29-Mar-2015
FieldbusTechnology
Presenter:
Todd Shadle
tshadle@phoenixcon.com
Lead Product Marketing Specialist
Serial / Process Fieldbus
Outline
1) What is ‘process’2) Fieldbus Overview3) Layout of Fieldbus Networks
1) General layout2) Hazardous locations / I.S.
4) Definition of Fieldbus and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Factory Automation / Process Automation
• Factory Automation– Making things – solids– Factory functions
• Machine Control
• Material Handling
– More discrete signals than analog
• Process Automation– Batch / Continuous – fluids– Pipes, Tanks, Valves, Pumps– Process functions
• Flow rates
• Pressure
• Temperature
• Levels
– More analog than discrete– Challenges
• Explosive
• Possibility of spills (environmental concerns)
• Toxic / Corrosive
Outline
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layout2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Market Distribution
ARC Definition of Fieldbusvs. Device Networks
Process Control
Logic Control
Simple Devices Complex Devices
Bit Byte Block
Type of Devices
Type of Control
MessageType
Devicebus
Sensorbus
Fieldbus
We Will Continue to Live in a Multi-Protocol World
Process Automation
Fieldbus & Device Network Applicability
DiscreteDiscrete
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Seri
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FM
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CA
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Lin
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Con
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ProcessProcess
Devic
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SD
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Worl
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Lon
Work
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ATM
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BusinesBusinesss
ControlControl
DeviceDevice
Bit-level Bit-level SensorSensor I
Loop
Growth – Global Shipments
Fieldbus Benefits
• Open Automation Infrastructure• Greatly Improved Asset Management• Reduced Wiring Costs ???• Reduced Process Variability (digital vs analog)• Increased Capacity Utilization• Reduced Maintenance Costs• Reduced Commissioning – auto detection• Reduced Spare Parts Inventory (trending data)• Improved Safety & Regulatory Compliance
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layouts2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Outline
12 | Process Fieldbus | Vogt | Interface | 04/10/23
FF powersupply / conditioner
Transient suppressor
Host with FF cards
Control Cabinet
General Layout – FF H1 Segment
Bulk powersupply
“SEGMENT”
“TRUNK”“SPURS”
Field
long distance (up to 1900m total) FF devices
Terminator
Additional SEGMENTS
Terminator
Foundation Fieldbus
Field
FF devices
T
Segment protectors
T
Redundant with diode and backup UPS
Emerson Yokogawa Honeywell Siemens Smar Invensys ABB
Devices per segment
• <32 protocol supported
• <16 host supported
• 8-12 installed reality
13 | Process Fieldbus | Vogt | Interface | 04/10/23
PLC
General Layout
“TRUNK”
Field
long distance (up to 1900m total)
T
Profibus PA
DP/PA Coupler
DP/PA Link
Terminator
“SEGMENT”
DP
“SPURS”
FF devices
Terminator
FF devices
T
Outline
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layout2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Safe AreaGeneral Purpose
Class 1 Div 2Zone 2
Control Cabinet
FNICO
Control Cabinet
Class I, Div.1Zone 1,0
FISCO
Ex – Traditional Solution
Entity
Safe areaGeneral purpose
NI Cond. / Barrier
PowerPowerSupplySupply
Junction Box / Segment Protector
Junction Box / Segment Protector
Junction Box / Segment Protector
Junction Box / Segment Protector
Centralized - NI and IS protection done in the
control cabinet
Fieldbus Nonincendive Concept
Fieldbus Intrinsically Safe Concept
Classical Calculations
IS Cond. / Barrier
IS Cond. / Barrier
Voltage and Current limited to the field
Low Power
Lower Power
Lowest Power
Class I, Div.2Zone 2
Class I, Div.2Zone 2
Control Cabinet
Zone 1
Ex – High Power Trunk
Safe areaGeneral purpose
Junction Box / Segment Protector
Junction Box / Segment Protector
Distributed - NI and IS protection done in the
field
Junction Box / Segment Protector
NI Barrier NI Barrier
IS Barrier
IS Barrier
Energy limiting PER SPUR
Class I, Div.1Zone 0
Junction Box / Segment Protector
Junction Box / Segment ProtectorHigher V = longer cable runs
Higher I = maximum # number of instruments per segment, even for IS
PowerPowerSupplySupply
PowerPowerSupplySupply
Safe AreaGeneral Purpose
Class 1 Div 2Zone 2
Class 1 Div 1Zone 1Zone 0
Control Cabinet
19 | Process Fieldbus | Vogt | Interface | 04/10/23
Intrinsic Safety Isolators
20 | Process Fieldbus | Vogt | Interface | 04/10/23
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layouts2) Hazardous locations / I.S.
4) Definition of Fieldbus and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Outline
Technical Basics of Foundation Fieldbus
• Bi-directional digital communications protocol used for communication between Foundation Fieldbus devices and the control system
• Digital communications and DC-powered network– Increases data to the user for diagnostics and asset management– Consolidates wiring versus standard point-to-point– Provides power and communications over a single shielded twisted pair
• FF is more than communications – control in the field via function blocks
• Manchester Bi-phase L encoding• Data rate of 31.25 kbps (H1 layer)• Pass token• Devices/Instruments…
– Will work between 9 – 32Vdc• 10mA – 20mA avg.
– Transmit using current signaling– Receive using voltage signaling
30mA10mA
Current – Voltage Signaling
24VDCPowerand
Conditioner
FF Device100 Ω
1µF
100 Ω
1µF
20mA
20mA5mA5mA
+
_
+
_+
_
+
_
5mA5mA
24
24.5
23.5
Cheap-O-scope
Outline
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layout2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
• Junction module provides a ‘star’ connection for end instruments to connect to the bus.
• Short circuit protection prevents an instrument failure from disrupting the entire segment.
FIELDBUS SEGMENT PROTECTORS
FF powersupply / conditioner
Transient suppressor
Host with FF cards
Control Cabinet
General Layout – FF H1 Segment
Bulk powersupply
T
Field
FF devices
T
Terminator
Device Fault Short Circuit
Terminator
FF powersupply / conditioner
Transient suppressor
Host with FF cards
Control Cabinet
General Layout – FF H1 Segment
Bulk powersupply
Field
FF devices
T
Terminator T
Terminator131 mA
56 mA
6 devices at 15 mA each Segment protector
circuitry limits short
90 mA
Device Fault Example
15 mA
• Short circuit protection: 15-60mA, fixed / switchable• 2,4,6,8,10,12-spur versions• A device can be removed without disrupting communication• Terminator: built-in, switchable, external, or automatic• LED indication of status• Access points for handheld communicators• Entire approvals range available in most cases… Zone 0-1-2,
Div 1-2• Compatible with FISCO, FNICO, or Entity• Pluggable screw terminals• IP20 DIN mount and IP67 with enclosure options
Device Couplers
• Trunk Module– Power from the trunk to TBus– Limits trunk voltage (9..32V)– Low voltage warning < 12V– User configurable shield– External terminator (-ET)
installed in trunk-Out terminal
Device Couplers
• 2-Spur Module– Two nonincendive spur outputs– Ease of wiring in enclosure – Four discrete current-limiting
setpoints
New Couplers
Outline
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layout2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
• FF Power supplies are used to provide power to each segment while allowing for isolation between segments.
• An integrated filter prevents the power supply from eliminating, or sinking, the superimposed data on the network.
FOUNDATION FIELDBUS POWER SUPPLIES
Fieldbus Power Supplies
• Single channel isolated and multi channel redundant versions
• 1,2,4,8-segment variations• Alarm contact for indication of failures• Advanced bus diagnostics• Built-in terminators• Input 18-30Vdc• Output 14-30Vdc @ 350-1A load• Non isolated versions also available (“power conditioner”) FF-831
Outline
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layout2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Fieldbus Cable Types vs. Max. Length
Type “A” is Preferred cable type according to IEC/ISA standard for new
installationsSource: Foundation Fieldbus Wiring and Application Guideline
Recommended Maximum Spur Length, m(ft)
Cable Connections
• Typical Connections are discrete to terminal blocks• Some manufacturers offer over molded 7/8” connectors• Most Instrument manufacturers offer discrete and 7/8”
connections
Foundation Fieldbus Cables and Connectors
1) What is ‘process’2) Fieldbus Overview3) Layout of FF network
1) General layout2) Hazardous locations / I.S.
4) Definition of FF and Technology5) Components
1) Segment protectors2) Power supplies3) Cabling & Connection4) Hosts (DCS) and instruments
Outline
Major Suppliers & FF-Compatible Products
ABB InvensysControl Systems Control SystemsMagmeters Pressure TransmitterPressure Transmitter Temperature TransmitterVortex/Swirl Meters Vortex FlowmeterMass Flowmeter
Emerson Process Solutions HoneywellControl Systems Control SystemsDigital Valve Controller Pressure TransmitterFloVue Final Control System Temperature TransmitterPressure TransmitterTemperature Transmitter YokogawaValve Positioner Control SystemsVortex Flowmeters Analytical EquipmentMagmeters Valve PositionerAnalytical Equipment Temperature TransmitterCoriolis Flowmeters Vortex Flowmeter
Pressure Transmitter
Thank you for the Opportunity