FOUNDATIONTM Fieldbus H1,
physical layer products
from MTL and Relcom
for DCS
TM Solutions inc
September, 2003
Copyright © 2003 by MTL Instruments and Relcom Inc
Fieldbus Terminology
Splice <1m Segment
Trunk
Terminator
Spurs
Terminator
Copyright © 2003 by MTL Instruments and Relcom Inc
Topology
Control Network
Junction
Box
Chicken Foot
Point-to-Point Bus with Spurs Daisy-Chain
or Tree
Copyright © 2003 by MTL Instruments and Relcom Inc
Spur Lengths
In General, Keep as Short as Practical
uSegmentDevices Maximum Spur Length
u 1-12 120 m
u 13-14 90 m
u 15-16 60 m
These numbers Assume 1 Device per Spur
Remember, These are Recommendations
Copyright © 2003 by MTL Instruments and Relcom Inc
Fieldbus Cable
u Shielded Twisted Pair (18 Ga.) is most commonly used.
u Type A Fieldbus Cable (eg. Belden 3076F) is preferred.
Cable Distance Characteristic Resistnce Atten.
Type meters Impedance Ohm/km dB/km Description
Type A 1900 100 22 3 18 AWG Each Twisted
Pair is Shielded
Type B 1200 100 56 5 22 AWG Multiple
Twisted Pair, one Shield
Type C 400 unknown 132 8 26 AWG Multiple
Twisted Pair, no Shield
Type D 200 unknown 20 8 16 AWG Multi-core, no
Twist, no Shield
Copyright © 2003 by MTL Instruments and Relcom Inc
Fieldbus Electrical Circuit Diagram
Near-End Far-End
Power Conditioner Terminator Terminator
Field Devices
100 Ω 100 Ω
Signal
+ Isolation
9-32V 1 µF 1 µF
- Inductors
1900M Max.
To H1
Interface
Card
Copyright © 2003 by MTL Instruments and Relcom Inc
Physical layer components
Safe or Zone/Division 2 hazardous area
Host
Link Active Scheduler
DCS / PLC
• Up to 32 devices/link
T Terminator
1 2 3
– Most hosts limited to Fieldbus Power Supply
16 devices MTL5995
• Devices MTL / Relcom
Wiring Components
– 9-32V required + short circuit protection
– 13 - 30mA/device FCS-MBx-SG
(typically 20 mA)
• MTL5995
– 19V Normally non-arcing
spur live disconnect
– 350mA Trunk MTL951
Spur
– Switchable terminator
T Terminator:
FBT1, FCS-MBT
Copyright © 2003 by MTL Instruments and Relcom Inc
Isolated power conditioners
To more power conditioners
Segment 2
PC
Note:
Terminators Segment 1
and host connection PC
not shown
Isolation
Bulk Power Bulk Power
Supply A Supply B Power
PC Conditioner
Protects against cross talk
and multi segment failure from multiple earth faults
Copyright © 2003 by MTL Instruments and Relcom Inc
Crosstalk
To more power conditioners
Segment 2
PC
Note:
Terminators Segment 1
and host connection PC
not shown
Bulk Power Bulk Power
Supply A Supply B Power
PC Conditioner
Copyright © 2003 by MTL Instruments and Relcom Inc
Earth faults
To more power conditioners
Segment 2
PC
Note:
Terminators Segment 1
and host connection PC
not shown
Bulk Power Bulk Power
Supply A Supply B Power
PC Conditioner
With 2 earth faults, all segments fail
Copyright © 2003 by MTL Instruments and Relcom Inc
MTL5995 Power Supply
Isolation and 19V,350mA output
power conditioning
Zone 2 and Division 2
mounting Market leader
Copyright © 2003 by MTL Instruments and Relcom Inc
Power supplies: redundant power
conditioners
To more backplanes
Note:
PC Segment
Alarm circuitry
terminators
and host connection PC Power Supply
not shown Backplane
Power Supply
Module
Bulk Power Bulk Power
Supply A Supply B Isolation
Power
PC Conditioner
Alarm
Copyright © 2003 by MTL Instruments and Relcom Inc
Redundant Power System
Reduced wiring Redundant isolated
power conditioning
Alarm circuitry
Replace power
Redundant DC modules without
power inputs resetting fieldbus
25V, 350mA output
Copyright © 2003 by MTL Instruments and Relcom Inc
Redundant Power System
Copyright © 2003 by MTL Instruments and Relcom Inc
Custom Redundant Power System
Replace power Redundant isolated
modules without power conditioning
resetting fieldbus
Connection to
redundant 4ch H1
Integrated cards
terminator
Redundant 24Vdc
power inputs
4 segments
25V, 350mA output Alarm module
Copyright © 2003 by MTL Instruments and Relcom Inc
Power supplies: single power conditioner
To more backplanes
Note:
Alarm circuitry Segment
terminators PC
and host connection
not shown
Bulk Power Bulk Power isolation
Supply A Supply B Power
PC Conditioner
• Ideal passive power conditioner: 5mH inductor + 50Ω
resistor
• But: voltage load dependant 14.5-32V+ 6W power
dissipation
Copyright © 2003 by MTL Instruments and Relcom Inc
Wiring Using a Traditional Junction Box
Interconnects between
spurs
Junction box has to be
drawn and documented
Any wiring errors cost
commissioning time
Copyright © 2003 by MTL Instruments and Relcom Inc
Megablock Series
SpurGuardTM option
Power LED >9V -short circuit protection
-visual indication of fault
Securable, pluggable
connectors
2, 4 and 8 drop versions Overvoltage protection
Copyright © 2003 by MTL Instruments and Relcom Inc
F118 Customize 10-way Megablock
SpurGuardTM option
-short circuit protection Connector
Power LED >9V -visual indication of fault
Switch selectable
Terminator
Over voltage protection
Copyright © 2003 by MTL Instruments and Relcom Inc
Megablock Junction Box Options
Copyright © 2003 by MTL Instruments and Relcom Inc
Fieldbus Device Commissioning and
Maintenance Tools
Basic life support: bus powered
>9V 3, signal 3, polarity 3
Signal generator for wire testing
Fieldbus monitor: bus powered
measures: DC volts, signal, noise
device count, new device
communication errors
Copyright © 2003 by MTL Instruments and Relcom Inc
Hazardous Areas
• Fieldbus H1 can be used in hazardous areas with
any of these protection techniques
Area Protection Technique Live working *
Zone/ normally non-arcing 7
Division 2 non-incendive 3
Zone/ increased safety/flameproof/explosionproof 7
Division 1 intrinsic safety 3
– *Live working without a gas clearance certificate
• Techniques allowing live working preferred
• Live connection/disconnection helps commissioning,
maintenance and expansions
Copyright © 2003 by MTL Instruments and Relcom Inc
Hazardous Areas
Safe or Zone/Division 2
Hazardous area
RP302 RP302 RP302
Repeater
1 2 3 1 2 3
1 2 3 1 2 3
IS fieldbus isolator MTL5053
Up to max. 4 isolator per H1 card
T T T T
Safe or Zone/Division 1
Hazardous area
Max. up to 4 IS fieldbus
device per isolator
T Terminator
FBT1, FCS-MBT
T T T
Copyright © 2003 by MTL Instruments and Relcom Inc
Non-incendive protection
All Gas Groups
350mA, typically 16 devices
No
No live
live working
working
OR
Live
Live connection/
connection/ Division 2 or Zone 2 Hazardous Area
disconnection
disconnection
Copyright © 2003 by MTL Instruments and Relcom Inc
NET9000 Series
• Designed for the harshest
process environment
• -40 to +70 deg C
• 5g vibration
• 30g shock
• G3 corrosive resistance
• IP65 in enclosure
• Zone 2 and Class I Div 2
mounting
Copyright © 2003 by MTL Instruments and Relcom Inc
Non-incendive protection
Live
Live connection/disconnection
connection/disconnection
trunk,
trunk,spurs
spursand
anddevices
devices
Gas Group C,D; IIB 330mA, typically 16 devices
Non
Non incendive
incendive or
or IS
IScertifed
certifed field
field devices
devices
Gas Group A,B; IIC: 120mA, typically 6 devices
Division 2 or Zone 2 Hazardous Area
Copyright © 2003 by MTL Instruments and Relcom Inc
Intrinsically safe protection - FISCO
Live
Live connection/disconnection
connection/disconnection
trunk,
trunk,spurs
spursand
anddevices
devices
Gas Group C,D; IIB 250mA, typically 12 devices
Gas Group A,B; IIC: 110mA, typically 5-6 devices
Safe Area
Div 2 or Zone 2 Division1 or Zone 1 Hazardous Area
Hazardous Area
Copyright © 2003 by MTL Instruments and Relcom Inc
912x-IS FISCO power supplies
• Fieldbus repeater for
multidrop power supplies
• Power, fault and comms
LEDs
• Switch selectable
terminator for host, fixed IS
terminator
• Switch selectable power
for host H1 card
• 250V ac DC power/host/IS
fieldbus isolation
Copyright © 2003 by MTL Instruments and Relcom Inc
Fantastic FISCO
• Engineer an IS fieldbus the same as general purpose
fieldbus
– Voltage from power supply
– Current required by devices
– Ohm’s law - resistance of cabling
– Require >9V at devices
Copyright © 2003 by MTL Instruments and Relcom Inc
Is that all there is to FISCO?
• Formerly IS installations done using IEC/EN60079-14
‘Entity’ required:
– calculation of cable parameters
– comparison of safety descriptions
– creation of descriptive system document
• Now IEC TS 60079-27 FISCO Technical
Specification
– Eliminates need to calculate cable parameters
– Reduces safety documentation to a list of devices
– Allows addition of devices without a review of safety
documentation
Copyright © 2003 by MTL Instruments and Relcom Inc
Fieldbus Intrinsically Safe COncept
• Field cables must conform to the following specification:
– Loop resistance must be between 15 and 150 ohms / km
– Loop inductance must be between 0.4 and 1 mH / km
– Loop capacitance must be between 80 and 200 nF / km
– Maximum length of each spur cable is 30m in IIC and IIB
– Maximum length of each trunk cable is 1 km in IIC or 5 km in IIB
• The limits are not restrictive
– typical Fieldbus cable has parameters of 50ohms/km, 0.8mH/km and
120nF/km
Copyright © 2003 by MTL Instruments and Relcom Inc
FISCO Safety Descriptions
Entity FISCO
Ui 24V 17.5V
Ii 250mA 380mA
Pi 1.2W 5.32W
Ci 5nF 5nF
Li 20µH 10µH
Copyright © 2003 by MTL Instruments and Relcom Inc
FISCO power supply -with entity devices
Safe or Zone/Division 2
hazardous area
FISCO
power supply
Zone/Division 1 hazardous area
Entity certified
IIC/A,B,C,D FISCO
Entity spur device
certified
connector
devices
Copyright © 2003 by MTL Instruments and Relcom Inc
932X-SC Spur Connectors
• 9321-SC connects FF816 entity
certified devices to FISCO power
supply segment.
• 9322-SC connects devices located
in Zone 0 to EEx ib fieldbus trunk
• DIN rail mounting
Copyright © 2003 by MTL Instruments and Relcom Inc
MTL Relcom – Non-arcing + Flameproof
FOUNDATION Fieldbus Solution
All Gas Groups
Live
Live connection/
connection/
disconnection
disconnection
OR
Zone 1 or 2 Hazardous Area
Copyright © 2003 by MTL Instruments and Relcom Inc
MTL951 live disconnect for zones 1 & 2
• Ideal for
– EEx nA normally non-sparking
– EEx d flameproof
– EEx e increased
• Fieldbus signal and 110/230V
ac power versions
• BASEEFA certified EEx de IIC
T4
• Simple and Inexpensive
Copyright © 2003 by MTL Instruments and Relcom Inc
Surge protection
MA-4000 Power Supply Protection FP32 Segment Protection
TP32 Instrument Protection
Copyright © 2003 by MTL Instruments and Relcom Inc
Surge protection
Copyright © 2003 by MTL Instruments and Relcom Inc
Surge protection
Copyright © 2003 by MTL Instruments and Relcom Inc
Surge protection
Copyright © 2003 by MTL Instruments and Relcom Inc
Surge protection
TP32
Copyright © 2003 by MTL Instruments and Relcom Inc
MTL/Relcom power supply/
wiring component users
• Shell Malampaya • Shell Deer Park
• Shell Athabasca • Shell Brent Alpha
• Arco/Philips Alaska • Suncor
• Syncrude • Gulf Petroleum Indonesia
• Anheuser Busch • Merisol
• BP Amoco Lima • Rutgers Organics
• Corning • Petronas Malaysia
• Exxon Mobil • Baxter
• Abbott Laboratories • Degussa
• Scanraff • Pertamina Dumai Indonesia
• Bayer • Conoco
• BASF • Citgo
• NPC • Genzyme
Copyright © 2003 by MTL Instruments and Relcom Inc
FOUNDATIONTM Fieldbus H1
physical layer products
from MTL and Relcom
Any Questions?
TM Solutions inc.
Tel: 02-784-2526
Fax: 02-784-2547
sales@tmsolution.co.kr
www.tmsolution.co.kr
www.imadang.co.kr
Copyright © 2003 by MTL Instruments and Relcom Inc
