Fieldbus Technology

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FieldbusTechnology
Presenter Todd Shadle tshadle_at_phoenixcon.com Lead
Product Marketing Specialist Serial / Process
Fieldbus
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Outline

• What is process
• Fieldbus Overview
• Layout of Fieldbus Networks
• General layout
• Hazardous locations / I.S.
• Definition of Fieldbus and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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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

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Outline

• What is process
• Fieldbus Overview
• Layout of FF network
• General layout
• Hazardous locations / I.S.
• Definition of FF and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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Market Distribution
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ARC Definition of Fieldbusvs. Device Networks
Type of Control
Process Control
Fieldbus
Devicebus
Logic Control
Sensorbus
Type of Devices
Complex Devices
Simple Devices
Message Type
Bit
Byte
Block
We Will Continue to Live in a Multi-Protocol World
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Process Automation
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Fieldbus Device Network Applicability
ATM / FDDI
Business
FF HSE H2
Profibus FMS
Control
ControlNet
Profibus DP
CCLink
Interbus
Device
DeviceNet
SDS
CAN
FF H1
LonWorks
WorldFIP
Bit-level Sensor
I Loop
ASI
Seriplex
Discrete
Process
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Growth Global Shipments
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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

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Outline

1. What is process
2. Fieldbus Overview
3. Layout of FF network
4. General layouts
5. Hazardous locations / I.S.
6. Definition of FF and Technology
7. Components
8. Segment protectors
9. Power supplies
10. Cabling Connection
11. Hosts (DCS) and instruments

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General Layout FF H1 Segment
Control Cabinet
Redundant with diode and backup UPS
Foundation Fieldbus
Bulk power supply
Emerson Yokogawa Honeywell Siemens Smar Invensys
ABB
Host with FF cards
SEGMENT
FF power supply / conditioner
T
Terminator
Transient suppressor
Segment protectors
Field
Field
Additional SEGMENTS
SPURS
TRUNK
Terminator

• Devices per segment
• lt32 protocol supported
• lt16 host supported
• 8-12 installed reality

T
long distance (up to 1900m total)
FF devices
FF devices
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General Layout
Profibus PA
PLC
DP
Terminator
T
SEGMENT
DP/PA Coupler
DP/PA Link
Field
SPURS
TRUNK
Terminator
T
long distance (up to 1900m total)
FF devices
FF devices
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Outline

• What is process
• Fieldbus Overview
• Layout of FF network
• General layout
• Hazardous locations / I.S.
• Definition of FF and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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Safe AreaGeneral Purpose
Control Cabinet
Class 1 Div 2Zone 2
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Ex Traditional Solution
Centralized - NI and IS protection done in the
control cabinet
Safe area General purpose
Control Cabinet
Junction Box / Segment Protector
Voltage and Current limited to the field
Class I, Div.2 Zone 2
Power Supply
Junction Box / Segment Protector
Low Power
NI Cond. / Barrier
FNICO
Fieldbus Nonincendive Concept
Class I, Div.1 Zone 1,0
Junction Box / Segment Protector
IS Cond. / Barrier
FISCO
Lower Power
Fieldbus Intrinsically Safe Concept
Entity
IS Cond. / Barrier
Junction Box / Segment Protector
Lowest Power
Classical Calculations
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Ex High Power Trunk
Distributed - NI and IS protection done in the
field
Safe area General purpose
Control Cabinet
Junction Box / Segment Protector
NI Barrier
NI Barrier
Class I, Div.2 Zone 2
Power Supply
Junction Box / Segment Protector
Junction Box / Segment Protector
Power Supply
IS Barrier
Zone 1
Junction Box / Segment Protector
Energy limiting PER SPUR
Class I, Div.1 Zone 0
IS Barrier
Junction Box / Segment Protector
Higher V longer cable runs Higher I maximum
number of instruments per segment, even for IS
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Safe AreaGeneral Purpose
Control Cabinet
Class 1 Div 2Zone 2
Class 1 Div 1Zone 1 Zone 0
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Intrinsic Safety Isolators
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Outline

1. What is process
2. Fieldbus Overview
3. Layout of FF network
4. General layouts
5. Hazardous locations / I.S.
6. Definition of Fieldbus and Technology
7. Components
8. Segment protectors
9. Power supplies
10. Cabling Connection
11. Hosts (DCS) and instruments

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Profibus PA

• Different from DP
• BUS Speed 31.25Kb/s
• Physical layer same as Foundation Fieldbus
• All PA devices operate from a DP master
• Connected via a linking device
• Logical communication the same as DP
• Master(s) / Slave (Poll Response)
• www.pto.org

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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

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Current Voltage Signaling
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24.5
23.5
20mA
Cheap-O-scope
5mA
5mA
30mA
10mA
20mA
24VDCPowerand Conditioner
FF Device
100 O
100 O
1µF
5mA
1µF
5mA
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Outline

• What is process
• Fieldbus Overview
• Layout of FF network
• General layout
• Hazardous locations / I.S.
• Definition of FF and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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FIELDBUS SEGMENT PROTECTORS

• 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.

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General Layout FF H1 Segment
Control Cabinet
Bulk power supply
Host with FF cards
Device Fault Short Circuit
FF power supply / conditioner
T
Terminator
Transient suppressor
Field
Terminator
T
FF devices
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General Layout FF H1 Segment
Control Cabinet
Bulk power supply
Device Fault Example
Host with FF cards
6 devices at 15 mA each
FF power supply / conditioner
Segment protector circuitry limits short
T
131 mA
90 mA
Terminator
56 mA
15 mA
Transient suppressor
Field
T
Terminator
FF devices
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Device Couplers

• 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

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Device Couplers

• Trunk Module
• Power from the trunk to TBus
• Limits trunk voltage (9..32V)
• Low voltage warning lt 12V
• User configurable shield
• External terminator (-ET) installed in trunk-Out
  terminal

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New Couplers

• 2-Spur Module
• Two nonincendive spur outputs
• Ease of wiring in enclosure
• Four discrete current-limiting setpoints

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Outline

• What is process
• Fieldbus Overview
• Layout of FF network
• General layout
• Hazardous locations / I.S.
• Definition of FF and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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FOUNDATION FIELDBUS POWER SUPPLIES

• 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.

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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 _at_ 350-1A load
• Non isolated versions also available (power
  conditioner)

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Outline

• What is process
• Fieldbus Overview
• Layout of FF network
• General layout
• Hazardous locations / I.S.
• Definition of FF and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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Fieldbus Cable Types vs. Max. Length
Type A is Preferred cable type according to
IEC/ISA standard for new installations
Source Foundation Fieldbus Wiring and
Application Guideline
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Recommended Maximum Spur Length, m(ft)
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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

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Foundation Fieldbus Cables and Connectors
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Outline

• What is process
• Fieldbus Overview
• Layout of FF network
• General layout
• Hazardous locations / I.S.
• Definition of FF and Technology
• Components
• Segment protectors
• Power supplies
• Cabling Connection
• Hosts (DCS) and instruments

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Major Suppliers FF-Compatible Products
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Thank you for the Opportunity