YOKOGAWA vigilantplant EJA Series User manual

Yokogawa Electric Corporation
User’s
Manual
IM 01C22T02-01E
Model EJA Series
Fieldbus Communication Type
IM 01C22T02-01E
9th Edition

i
CONTENTS
IM 01C22T02-01E
FD No. IM 01C22T02-01E
9th Edition: Jan. 2008(KP)
All Rights Reserved, Copyright © 1998, Yokogawa Electric Corporation
CONTENTS
1. INTRODUCTION............................................................................................1-1
Regarding This Manual................................................................................. 1-1
1.1 For Safe Use of Product ..................................................................... 1-1
1.2 Warranty.............................................................................................. 1-2
1.3 ATEX Documentation.......................................................................... 1-3
2. HANDLING CAUTION...................................................................................2-1
2.1 Installation of an Explosion-Protected Instrument .............................. 2-1
2.1.1 FM approval................................................................................... 2-1
2.1.2 CSA Certification ........................................................................... 2-5
2.1.3 CENELEC ATEX (KEMA) Certification ......................................... 2-5
2.1.4 IECEx Certification ........................................................................ 2-9
3. ABOUT FIELDBUS .......................................................................................3-1
3.1 Outline ................................................................................................. 3-1
3.2 Internal Structure of EJA..................................................................... 3-1
3.2.1 System/network Management VFD ............................................. 3-1
3.2.2 Function Block VFD ..................................................................... 3-1
3.3 Logical Structure of Each Block.......................................................... 3-1
3.4 Wiring System Configuration .............................................................. 3-1
4. GETTING STARTED ..................................................................................... 4-1
4.1 Connection of Devices ........................................................................ 4-1
4.2 Host Setting......................................................................................... 4-2
4.3 Bus Power ON .................................................................................... 4-3
4.4 Integration of DD................................................................................. 4-3
4.5 Reading the Parameters ..................................................................... 4-3
4.6 Continuous Record of Values ............................................................. 4-4
4.7 Generation of Alarm............................................................................ 4-4
5. CONFIGURATION.........................................................................................5-1
5.1 Network Design................................................................................... 5-1
5.2 Network Definition ............................................................................... 5-1
5.3 Definition of Combining Function Blocks ............................................ 5-2
5.4 Setting of Tags and Addresses .......................................................... 5-3
5.5 Communication Setting ....................................................................... 5-4
5.5.1 VCR Setting.................................................................................. 5-4
5.5.2 Function Block Execution Control ................................................ 5-5
5.6 Block Setting ....................................................................................... 5-5
5.6.1 Link Object ................................................................................... 5-5
5.6.2 Trend Object................................................................................. 5-6
5.6.3 View Object .................................................................................. 5-6
5.6.4 Function Block Parameters .......................................................... 5-8
5.6.5 Transducer Block Parameters...................................................... 5-9

ii
CONTENTS
IM 01C22T02-01E
6. IN-PROCESS OPERATION ..........................................................................6-1
6.1 Mode Transition .................................................................................. 6-1
6.2 Generation of Alarm............................................................................ 6-1
6.2.1 Indication of Alarm ....................................................................... 6-1
6.2.2 Alarms and Events ....................................................................... 6-1
6.3 Simulation Function............................................................................. 6-2
7. DEVICE STATUS ..........................................................................................7-1
8. GENERAL SPECIFICATIONS ......................................................................8-1
8.1 Standard Specifications ...................................................................... 8-1
8.2 Optional Specifications........................................................................ 8-2
APPENDIX 1. LIST OF PARAMETERS FOR EACH BLOCK OF THE EJA... A-1
A1.1 Resource Block ...................................................................................A-1
A1.2 Al Function Block ................................................................................A-3
A1.3 Transducer Block ................................................................................A-5
APPENDIX 2. APPLICATION, SETTING AND CHANGE OF BASIC
PARAMETERS ............................................................................................. A-7
A2.1 Applications and Selection of Basic Parameters................................A-7
A2.2 Setting and Change of Basic Parameters ..........................................A-8
A2.3 Setting the AI1 Function Block ...........................................................A-8
A2.4 Setting the AI2 Function Block .........................................................A-10
A2.5 Setting the Transducer Block............................................................A-10
APPENDIX 3. OPERATION OF EACH PARAMETER IN FAILURE MODE.... A-12
APPENDIX 4. PID BLOCK .............................................................................. A-14
A4.1 Function Diagram..............................................................................A-14
A4.2 Functions of PID Bock ......................................................................A-14
A4.3 Parameters of PID Block ..................................................................A-15
A4.4 PID Computation Details...................................................................A-17
A4.4.1 PV-proportional and -derivative Type PID (I-PD)
Control Algorithm........................................................................A-17
A4.4.2 PID Control Parameters .............................................................A-17
A4.5 Control Output...................................................................................A-17
A4.5.1 Velocity Type Output Action.......................................................A-17
A4.6 Direction of Control Action ................................................................A-17
A4.7 Control Action Bypass.......................................................................A-17
A4.8 Feed-forward .....................................................................................A-18
A4.9 Block Modes......................................................................................A-18
A4.9.1 Mode Transitions.......................................................................A-18
A4.10Bumpless Transfer ............................................................................A-19
A4.11Setpoint Limiters ...............................................................................A-19
A4.11.1 When PID Block Is in Auto Mode ............................................A-19
A4.11.2 When PID Block Is in Cas or RCas Mode...............................A-19

iii
CONTENTS
IM 01C22T02-01E
A4.12External-output Tracking ...................................................................A-19
A4.13Measured-value Tracking..................................................................A-19
A4.14Initialization and Manual Fallback (IMan) .........................................A-20
A4.15Manual Fallback ................................................................................A-20
A4.16Auto Fallback ....................................................................................A-20
A4.17Mode Shedding upon Computer Failure...........................................A-21
A4.17.1 SHED_OPT ..............................................................................A-21
A4.18Alarms ...............................................................................................A-21
A4.18.1 Block Alarm (BLOCK_ALM) .....................................................A-21
A4.18.2 Process Alarms ........................................................................A-21
A4.19Example of Block Connections .........................................................A-22
A4.19.1 View Object for PID Function Block.........................................A-22
APPENDIX 5. LINK MASTER FUNCTIONS ................................................... A-24
A5.1 Link Active Scheduler .......................................................................A-24
A5.2 Link Master........................................................................................A-24
A5.3 Transfer of LAS.................................................................................A-25
A5.4 LM Functions.....................................................................................A-26
A5.5 LM Parameters..................................................................................A-27
A5.5.1 LM Parameter List......................................................................A-27
A5.5.2 Descriptions for LM Parameters ................................................A-29
A5.6 FAQs .................................................................................................A-31
APPENDIX 6. SOFTWARE DOWNLOAD....................................................... A-32
A6.1 Benefits of Software Download.........................................................A-32
A6.2 Specifications ....................................................................................A-32
A6.3 Preparations for Software Downloading ...........................................A-32
A6.4 Flow of Software Download ..............................................................A-33
A6.5 Download Files..................................................................................A-33
A6.6 Steps after Activating a Field Device................................................A-34
A6.7 Troubleshooting.................................................................................A-35
A6.8 Resource Block’s Parameters Relating to Software Download ....... A-35
A6.9 View Objects Altered by Software Download ...................................A-37
A6.10System/Network Management VFD Parameters Relating to
Software Download ...........................................................................A-38
A6.11Comments on System/Network Management VFD Parameters
Relating to Software Download ........................................................A-39
REVISION RECORD

IM 01C22T02-01E
1-1
1. INTRODUCTION
1. INTRODUCTION
This manual contains a description of the DPharp EJA
Series Differential Pressure/Pressure Transmitter
Fieldbus Communication Type. The Fieldbus commu-
nication type is based on the same silicon resonant
sensing features as that of the BRAIN communication
type, which is employed as the measurement principle,
and is similar to the BRAIN communication type in
terms of basic performance and operation. This manual
describes only those topics that are required for
operation of the Fieldbus communication type and that
are not contained in the BRAIN communication type
instruction manual. Refer to each of the following
instruction manuals for topics common to the BRAIN
communication and Fieldbus communication types.
Table 1.1 List of Individual User’s Manuals
T0101.EPS
EJA110A, EJA120A, EJA130A IM 01C21B01-01E
EJA210A, EJA220A IM 01C21C01-01E
EJA310A, EJA430A, EJA440A IM 01C21D01-01E
EJA510A, EJA530A IM 01C21F01-01E
EJA118W, EJA118N, EJA118Y IM 01C22H01-01E
EJA438W, EJA438N IM 01C22J01-01E
EJA115 IM 01C22K01-01E
Regarding This Manual
•This manual should be passed on to the end user.
•The contents of this manual are subject to change
without prior notice.
•All rights reserved. No part of this manual may be
reproduced in any form without Yokogawa’s written
permission.
•Yokogawa makes no warranty of any kind with
regard to this manual, including, but not limited to,
implied warranty of merchantability and fitness for a
particular purpose.
•If any question arises or errors are found, or if any
information is missing from this manual, please
inform the nearest Yokogawa sales office.
•The specifications covered by this manual are
limited to those for the standard type under the
specified model number break-down and do not
cover custom-made instruments.
•Please note that changes in the specifications,
construction, or component parts of the instrument
may not immediately be reflected in this manual at
the time of change, provided that postponement of
revisions will not cause difficulty to the user from a
functional or performance standpoint.
•The following safety symbol marks are used in this
manual:
WARNING
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury. It may also be used to alert against
unsafe practices .
IMPORTANT
Indicates that operating the hardware or software
in this manner may damage it or lead to system
failure.
NOTE
Draws attention to information essential for
understanding the operation and features.
1.1 For Safe Use of Product
For the protection and safety of the operator and the
instrument or the system including the instrument,
please be sure to follow the instructions on safety
described in this manual when handling this instru-
ment. In case the instrument is handled in contradiction
to these instructions, Yokogawa does not guarantee
safety. Please give your attention to the followings.

IM 01C22T02-01E
1-2
1. INTRODUCTION
(a) Installation
•The instrument must be installed by an expert
engineer or a skilled personnel. The procedures
described about INSTALLATION are not permitted
for operators.
•In case of high process temperature, care should be
taken not to burn yourself because the surface of
body and case reaches a high temperature.
•The instrument installed in the process is under
pressure. Never loosen the process connector bolts to
avoid the dangerous spouting of process fluid.
•During draining condensate from the pressure-
detector section, take appropriate care to avoid
contact with the skin, eyes or body, or inhalation of
vapors, if the accumulated process fluid may be
toxic or otherwise harmful.
•When removing the instrument from hazardous
processes, avoid contact with the fluid and the
interior of the meter.
•All installation shall comply with local installation
requirement and local electrical code.
(b) Wiring
•The instrument must be installed by an expert
engineer or a skilled personnel. The procedures
described about WIRING are not permitted for
operators.
•Please confirm that voltages between the power
supply and the instrument before connecting the
power cables and that the cables are not powered
before connecting.
(c) Operation
•Wait 10 min. after power is turned off, before
opening the covers.
(d) Maintenance
•Please do not carry out except being written to a
maintenance descriptions. When these procedures
are needed, please contact nearest YOKOGAWA
office.
•Care should be taken to prevent the build up of drift,
dust or other material on the display glass and
name plate. In case of its maintenance, soft and dry
cloth is used.
(e) Explosion Protected Type Instrument
•Users of explosion proof instruments should refer
first to section 2.1 (Installation of an Explosion
Protected Instrument) of this manual.
•The use of this instrument is restricted to those who
have received appropriate training in the device.
•Take care not to create sparks when accessing the
instrument or peripheral devices in a hazardous
location.
(f) Modification
•Yokogawa will not be liable for malfunctions or
damage resulting from any modification made to this
instrument by the customer.
1.2 Warranty
•The warranty shall cover the period noted on the
quotation presented to the purchaser at the time of
purchase. Problems occurred during the warranty
period shall basically be repaired free of charge.
•In case of problems, the customer should contact the
Yokogawa representative from which the instrument
was purchased, or the nearest Yokogawa office.
•If a problem arises with this instrument, please
inform us of the nature of the problem and the
circumstances under which it developed, including
the model specification and serial number. Any
diagrams, data and other information you can
include in your communication will also be helpful.
•Responsible party for repair cost for the problems
shall be determined by Yokogawa based on our
investigation.
•The Purchaser shall bear the responsibility for repair
costs, even during the warranty period, if the
malfunction is due to:
- Improper and/or inadequate maintenance by the
purchaser.
- Failure or damage due to improper handling, use or
storage which is out of design conditions.
- Use of the product in question in a location not
conforming to the standards specified by
Yokogawa, or due to improper maintenance of the
installation location.
- Failure or damage due to modification or repair by
any party except Yokogawa or an approved
representative of Yokogawa.
- Malfunction or damage from improper relocation
of the product in question after delivery.
- Reason of force majeure such as fires, earthquakes,
storms/floods, thunder/lightening, or other natural
disasters, or disturbances, riots, warfare, or
radioactive contamination.

IM 01C22T02-01E
1-3
1. INTRODUCTION
1.3 ATEX Documentation
This procedure is only applicable to the countries in
European Union.
GB
All instruction manuals for ATEX Ex related products
are available in English, German and French. Should
you require Ex related instructions in your local
language, you are to contact your nearest Yokogawa
office or representative.
DK
Alle brugervejledninger for produkter relateret til
ATEX Ex er tilgængelige på engelsk, tysk og fransk.
Skulle De ønske yderligere oplysninger om håndtering
af Ex produkter på eget sprog, kan De rette
henvendelse herom til den nærmeste Yokogawa
afdeling eller forhandler.
I
Tutti i manuali operativi di prodotti ATEX
contrassegnati con Ex sono disponibili in inglese,
tedesco e francese. Se si desidera ricevere i manuali
operativi di prodotti Ex in lingua locale, mettersi in
contatto con l’ufficio Yokogawa più vicino o con un
rappresentante.
E
Todos los manuales de instrucciones para los productos
antiexplosivos de ATEX están disponibles en inglés,
alemán y francés. Si desea solicitar las instrucciones de
estos artículos antiexplosivos en su idioma local,
deberá ponerse en contacto con la oficina o el
representante de Yokogawa más cercano.
NL
Alle handleidingen voor producten die te maken
hebben met ATEX explosiebeveiliging (Ex) zijn
verkrijgbaar in het Engels, Duits en Frans. Neem,
indien u aanwijzingen op het gebied van
explosiebeveiliging nodig hebt in uw eigen taal, contact
op met de dichtstbijzijnde vestiging van Yokogawa of
met een vertegenwoordiger.
SF
Kaikkien ATEX Ex -tyyppisten tuotteiden käyttöhjeet
ovat saatavilla englannin-, saksan- ja ranskankielisinä.
Mikäli tarvitsette Ex -tyyppisten tuotteiden ohjeita
omalla paikallisella kielellännne, ottakaa yhteyttä
lähimpään Yokogawa-toimistoon tai -edustajaan.
P
Todos os manuais de instruções referentes aos produtos
Ex da ATEX estão disponíveis em Inglês, Alemão e
Francês. Se necessitar de instruções na sua língua
relacionadas com produtos Ex, deverá entrar em
contacto com a delegação mais próxima ou com um
representante da Yokogawa.
F
Tous les manuels d’instruction des produits ATEX Ex
sont disponibles en langue anglaise, allemande et
française. Si vous nécessitez des instructions relatives
aux produits Ex dans votre langue, veuillez bien
contacter votre représentant Yokogawa le plus proche.
D
Alle Betriebsanleitungen für ATEX Ex bezogene
Produkte stehen in den Sprachen Englisch, Deutsch
und Französisch zur Verfügung. Sollten Sie die
Betriebsanleitungen für Ex-Produkte in Ihrer
Landessprache benötigen, setzen Sie sich bitte mit
Ihrem örtlichen Yokogawa-Vertreter in Verbindung.
S
Alla instruktionsböcker för ATEX Ex (explosionssäkra)
produkter är tillgängliga på engelska, tyska och
franska. Om Ni behöver instruktioner för dessa
explosionssäkra produkter på annat språk, skall Ni
kontakta närmaste Yokogawakontor eller representant.
GR
       ATEX Ex
  ,   .
       Ex 
     
   Yokogawa   .

IM 01C22T02-01E
1-4
1. INTRODUCTION
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IM 01C22T02-01E
2-1
2. HANDLING CAUTION
2. HANDLING CAUTION
2.1 Installation of an Explosion-
Protected Instrument
If a customer makes a repair or modification to an
intrinsically safe or explosionproof instrument and the
instrument is not restored to its original condition, its
intrinsically safe or explosionproof construction may
be compromised and the instrument may be hazardous
to operate. Please contact Yokogawa before making
any repair or modification to an instrument.
CAUTION
This instrument has been tested and certified as
being intrinsically safe or explosionproof. Please
note that severe restrictions apply to this
instrument’s construction, installation, external
wiring, maintenance and repair. A failure to
abide by these restrictions could make the
instrument a hazard to operate.
WARNING
Maintaining the safety of explosionproof equip-
ment requires great care during mounting,
wiring, and piping. Safety requirements also
place restrictions on maintenance and repair.
Please read the following sections very carefully.
WARNING
The range setting switch must not be used in a
hazardous area.
2.1.1 FM approval
a. FM Explosionproof Type
Caution for FM Explosionproof type
Note 1. EJA Series differential, gauge, and absolute
pressure transmitters with optional code /FF15
are applicable for use in hazardous locations:
•Applicable standard: FM3600, FM3615,
FM3810, ANSI/NEMA250
•Explosionproof for Class I, Division 1,
Groups B, C and D.
•Dust-ignitionproof for Class II/III, Division
1, Groups E, F and G.
•Outdoor hazardous locations, NEMA 4X.
•Temperature Class: T6
•Ambient Temperature: –40 to 60°C
•Supply Voltage: 32V dc max.
•Current Draw: 16.5 mA dc
Note 2. Wiring
•All wiring shall comply with National
Electrical Code ANSI/NEPA70 and Local
Electrical Codes.
•When installed in Division 1, “FACTORY
SEALED, CONDUIT SEAL NOT RE-
QUIRED.”
Note 3. Operation
•Keep strictly the “CAUTION” on the
nameplate attached on the transmitter.
CAUTION: OPEN CIRCUIT BEFORE
REMOVING COVER.
“FACTORY SEALED, CONDUIT
SEAL NOT REQUIRED.”
INSTALL IN ACCORDANCE
WITH THE INSTRUCTION
MANUAL IM 1C22.
•Take care not to generate mechanical
sparking when accessing the instrument and
peripheral devices in a hazardous location.
Note 4. Maintenance and Repair
•The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric Corpo-
ration is prohibited and will void Factory
Mutual Explosionproof Approval.

IM 01C22T02-01E
2-2
2. HANDLING CAUTION
b. FM Intrinsically Safe Type
EJA Series differential, gauge, and absolute
pressure transmitters with optional code /FS15.
• Applicable standard: FM3600, FM3610, FM3611,
FM3810, ANSI/NEMA250
• FM Intrinsically Safe Approval
[Entity Model]
Class I, II & III, Division 1, Groups A, B, C, D, E,
F & G, Temperature Class T4 Ta=60°C, Type 4X
and Class I, Zone 0, AEx ia IIC, Temperature Class
T4 Ta=60°C, Type 4X
[FISCO Model]
Class I, II & III, Division 1, Groups A, B, C, D, E,
F & G, Temperature Class T4 Ta=60°C, Type 4X
and Class I, Zone 0, AEx ia IIC, Temperature Class
T4 Ta=60°C, Type 4X
• Nonincendive Approval
Class I, Division 2, Groups A, B, C & D
Temperature Class T4 Ta=60°C, Type 4X and
Class II, Division 2, Groups F & G Temperature
Class T4 Ta=60°C, Type 4X and Class I, Zone 2,
Group IIC, Temperature Class T4 Ta=60°C, Type
4X and Class III, Division 2, Temperature Class T4
Ta=60°C, Type 4X
• Electrical Connection: 1/2 NPT female
• Caution for FM Intrinsically safe type. (Following
contents refer to “DOC. No. IFM018-A12 p.1, p.2,
p.3, and p.3-1.”)
IFM018-A12
Installation Diagram
(Intrinsically safe, Division 1 Installation)
Non-Hazardous Location
Hazardous Location
F0204.EPS
Terminator
Safety Barrier
Field Instruments
Pressure
Transmitter
Field Instruments






*1: Dust-tight conduit seal must be used when installed
in Class II and Class III environments.
*2: Control equipment connected to the Associated
Apparatus must not use or generate more than 250
Vrms or Vdc.
*3: Installation should be in accordance with ANSI/
ISA RP12/6 “Installation of Intrinsically Safe
Systems for Hazardous (Classified) Locations” and
the National Electrical Code (ANSI/NFPA 70)
Sections 504 and 505.
*4: The configuration of Associated Apparatus must be
Factory Mutual Research Approved under FISCO
Concept.
*5: Associated Apparatus manufacturer’s installation
drawing must be followed when installing this
equipment.
*6: The EJA100 Series are approved for Class I, Zone
0, applications. If connecting AEx (ib) associated
Apparatus or AEx ib I.S. Apparatus to the Zone 2,
and is not suitable for Class I, Zone 0 or Class I,
Division 1, Hazardous (Classified) Locations.
*7: No revision to drawing without prior Factory
Mutual Research Approval.
*8: Terminator must be FM Approved.
Electrical Data:
• Rating 1 (Entity)
For Groups A, B, C, D, E, F, and G or Group IIC
Maximum Input Voltage Vmax: 24 V
Maximum Input Current Imax: 250 mA
Maximum Input Power Pmax: 1.2 W
Maximum Internal Capacitance Ci: 3.52 nF
Maximum Internal Inductance Li: 0 H
or
• Rating 2 (FISCO)
For Groups A, B, C, D, E, F, and G or Group IIC
Maximum Input Voltage Vmax: 17.5 V
Maximum Input Current Imax: 360 mA
Maximum Input Power Pmax: 2.52 W
Maximum Internal Capacitance Ci: 3.52 nF
Maximum Internal Inductance Li: 0 H
or
• Rating 3 (FISCO)
For Groups C, D, E, F, and G or Group IIB
Maximum Input Voltage Vmax: 17.5 V
Maximum Input Current Imax: 380 mA
Maximum Input Power Pmax: 5.32 W
Maximum Internal Capacitance Ci: 3.52 nF
Maximum Internal Inductance Li: 0 H
Note: In the rating 1, the output current of the barrier must be
limited by a resistor “Ra” such that Io=Uo/Ra. In the rating
2 or 3, the output characteristics of the barrier must be the
type of trapezoid which are certified as the FISCO model
(See “FISCO Rules”). The safety barrier may include a
terminator. More than one field instruments may be
connected to the power supply line.

IM 01C22T02-01E
2-3
2. HANDLING CAUTION
FISCO Rules
The FISCO Concept allows the interconnection of
intrinsincally safe apparatus to associated apparatus not
specifically examined in such combination. The
criterion for such interconnection is that the voltage
(Ui), the current (Ii) and the power (Pi) which intrinsi-
cally safe apparatus can receive and remain intrinsi-
cally safe, considering faults, must be equal or greater
than the voltage (Uo, Voc, Vt), the current (Io) and the
power (Po) which can be provided by the associated
apparatus (supply unit).
PoPi, UoUi, IoIi
In addition, the maximum unprotected residual capaci-
tance (Ci) and inductance (Li) of each apparatus (other
than the terminators) connected to the fieldbus must be
less than or equal to 5 nF and 10 H respectively.
Ci5nF, Li10H
In each I.S. fieldbus segment only one active source,
normally the associated apparatus, is allowed to
provide the necessary power for the fieldbus system.
The allowed voltage Uo of the associated apparatus
used to supply the bus is limited to the range of 14 V
dc to 24 V dc. All other equipment connected to the
bus cable has to be passive, meaning that the apparatus
is not allowed to provide energy to the system, except
to a leakage current of 50 A for each connected
device.
Supply unit
Trapezoidal or rectangular output characteristic only
Uo = 14...17.5 V (I.S. maximum value)
Io according to spark test result or other assess-
ment. No specification of Lo and Co is required on
the certificate or label.
Cable
The cable used to interconnect the devices needs to
comply with the following parameters:
Loop resistance Rc: 15...150 Ω/km
Inductance per unit length Lc: 0.4...1 mH/km
Capacitance per unit length Cc: 80...200 nF/km
Length of spur cable: max. 30 m (Group IIC and
IIB)
Length of trunk cable: max. 1 km (Group IIC) or 5
km (Group IIB)
Terminators
At each end of the trunk cable an approved line
terminator with the following parameters is suitable:
R= 90...102 Ω
C= 0...2.2 F (0.8...1.2 F is required in operation)
The resistor must be infallible according to IEC 60079-
11.
System evaluations
The number of passive device like transmitters,
actuators, hand held terminals connected to a single
bus segment is not limited due to I.S. reasons. Further-
more, if the above rules are respected, the inductance
and capacitance of the cable need not to be considered
and will not impair the intrinsic safety of the installa-
tion.
SAFE AREAHAZARDOUS AREA
F0205.EPS
Terminator
(FISCO Model) Ex i
Field Instruments
(Passive)
Hand-
held-
Terminal
Supply Unit and
Safety Barrier
(FISCO Model)
Terminator
Data
UU
I
I.S. fieldbus system complying with FISCO model

IM 01C22T02-01E
2-4
2. HANDLING CAUTION
Installation Diagram
(Nonincendive, Division 2 Installation)
Non-Hazardous Location
Hazardous Location
F0206.EPS
Terminator
(Nonincendive)
Power Supply
Field Instruments
Pressure
Transmitter
Field Instruments






Vmax = 32 V
Ci = 3.52 nF
Li = 0 H
FM Approved Associated Nonincendive
Field Wiring Apparatus
Vt or Voc
It or Isc
Ca
La
*1: Dust-tight conduit seal must be used when installed
in Class II and Class III environments.
*2: Installation should be in accordance with the
National Electrical Code (ANSI/NFPA 70) Sections
504 and 505.
*3: The configuration of Associated Nonincendive
Field Wiring Apparatus must be Factory Mutual
Research Approved under FISCO Concept.
*4: Associated Nonincendive Field Wiring Apparatus
manufacturer’s installation drawing must be
followed when installing this equipment.
*5: No revision to drawing without prior Factory
Mutual Research Approval.
*6: Terminator and supply unit must be FM Approved.
*7: If use ordinary wirings, the general purpose
equipment must have nonincendive field wiring
terminal approved by FM Approvals.
*8: The nonincendive field wiring circuit concept
allows interconection of nonincendive field wiring
apparatus with associated nonincendive field wiring
apparatus, using any of the wiring methods permit-
ted for unclassified locations.
*9: Installation requirements;
Vmax Voc or Vt
Imax = see note 10.
Ca Ci + Ccable
La Li + Lcable
*10: For this current controlled circuit, the parameter
(Imax) is not required and need not be aligned with
parameter (Isc or It) of the barrier or associated
nonincendive field wiring apparatus.
Electrical Data:
Maximum Input Voltage Vmax: 32 V
Maximum Internal Capacitance Ci: 3.52 nF
Maximum Internal Inductance Li: 0 H
c. FM Nonincendive approval
Model EJA Series differential, gauge, and absolute
pressure transmitters with optional code /FN15.
•Applicable standard: FM3600, FM3611, FM3810
•Nonincendive Approval
Class I, Division 2, Groups A, B, C and D
Class II, Division 2, Groups F and G
Class III, Division 1 and
Class I, Zone 2, Group IIC in Hazardous
(Classified) Locations.
Temperature Class: T4
Ambient Temperature: –40 to 60°C
Ambient Humidity: 0 to 100%R.H. (No condensation)
Enclosure: NEMA Type4X
•Electrical Parameters:
Vmax = 32 Vdc
Ci = 3.52 nF
Li = 0 µH
•Caution for FM Nonincendive type. (Following
contents refer to “DOC. No. NFM012-A08 p.1 and
p.2”)
NFM012-A08
Installation Diagram:
Safe Area
Hazardous Area
F0207.EPS
Terminator
Terminator
Field Instruments
Pressure
Transmitter
Field Instruments
Supply






Note:
1: Dust-tight conduit seal must be used when installed
in Class II and Class III environments.

IM 01C22T02-01E
2-5
2. HANDLING CAUTION
2: Installation should be in accordance with National
Electrical Code (ANSI/NFPA 70) Sections 504, 505
and Local Electrical Code.
3: The configuration of Associated Apparatus must be
Factory Mutual Research Approved.
4: Associated Apparatus manufacturer’s installation
drawing must be followed when installing this
equipment.
5: No revision to drawing without prior Factory Mutual
Research Approval.
6: Terminator and supply unit must be FM approved.
7: Installation requirements;
Vmax Voc or Vt
Ca Ci + Ccable
La Li + Lcable
2.1.2 CSA Certification
Caution for CSA Explosionproof type
Note 1. EJA Series differential, gauge, and absolute
pressure transmitter with optional code /CF15
are applicable for use in hazardous locations:
•Applicable standard: C22.2 No.0, No.0.4,
No.25, No.30, No.94, No.142, No.1010.1
•Certificate: 1010820
•Explosionproof for Class I, Division 1,
Groups B, C and D.
•Dust-ignitionproof for Class II/III, Division
1, Groups E, F and G.
•Encl “Type 4X”
•Temperature Class: T6 T5 T4
•Process Temperature: 85°C100°C120°C
•Ambient Temperature: –40 to 80°C
•Supply Voltage: 32 V dc max.
•Current Draw: 16.5 mA dc
Note 2. Wiring
•All wiring shall comply with Canadian
Electrical Code Part I and Local Electrical
Codes.
•In hazardous location, wiring shall be in
conduit as shown in the figure.
•CAUTION: SEAL ALL CONDUITS
WITHIN 50 cm OF THE ENCLO-
SURE.
UN SCELLEMENT DOIT ÊTRE
INSTALLÉ À MOINS DE 50 cm DU
BÎTIER.
•When installed in Division 2, “SEALS NOT
REQUIRED.”
Note 3. Operation
•Keep strictly the “CAUTION” on the label
attached on the transmitter.
CAUTION: OPEN CIRCUIT BEFORE
REMOVING COVER.
OUVRIR LE CIRCUIT AVANT
D´NLEVER LE COUVERCLE.
•Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous location.
Note 4. Maintenance and Repair
•The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric Corpo-
ration and Yokogawa Corporation of
America is prohibited and will void Cana-
dian Standards Explosionproof Certification.
Non-hazardous
Location
Equipment
32 V DC Max.
15 mA DC
Output current
Non-Hazardous
Locations Hazardous Locations Division 1
Non-Hazardous
Locations Hazardous Locations Division 2
50 cm Max.
Sealing Fitting Conduit
EJA Series
Non-hazardous
Location
Equipment
32 V DC Max.
15 mA DC
Output current Sealing Fitting
EJA Series
F0201.EPS
2.1.3 CENELEC ATEX (KEMA) Certifica-
tion
(1) Technical Data
a. CENELEC ATEX (KEMA) Intrinsically Safe
Type
Caution for CENELEC ATEX (KEMA) Intrinsically
safe Type.
Note 1. EJA Series differential, gauge, and absolute
pressure transmitters with optional code /KS25
for potentially explosive atmospheres:
•No. KEMA 02ATEX1344 X
•Applicable standard: EN50014:1997,
EN50020:1994, EN50284:1999
•Type of Protection and Marking Code: EEx
ia IIC T4
•Temperature Class: T4
•Enclosure: IP67

IM 01C22T02-01E
2-6
2. HANDLING CAUTION
•Process Temperature: 120°C max.
•Ambient Temperature: –40 to 60°C
Note 2. Installation
•All wiring shall comply with local installa-
tion requirements. (Refer to the installation
diagram)
Note 3. Maintenance and Repair
•The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric Corpo-
ration is prohibited and will void KEMA
Intrinsically safe Certification.
Note 4. Special Conditions for Safe Use
•In the case where the enclosure of the
Pressure Transmitter is made of aluminium,
if it is mounted in an area where the use of
category 1 G apparatus is required, it must
be installed such, that even in the event of
rare incidents, ignition sources due to impact
and friction sparks are excluded.
FISCO Model
Non-Hazardous
Locations Hazardous Locations
F0202.EPS
Terminator
(FISCO Model)
Ex i
Field Instruments
(Passive)
Hand-
held-
Terminal
Supply Unit and
Safety Barrier
(FISCO Model)
Terminator
Data
U
U
I
I.S. fieldbus system complying with FISCO
The criterion for such interconnection is that the
voltage (Ui), the current (Ii) and the power (Pi), which
intrinsically safe apparatus can receive, must be equal
or greater than the voltage (Uo), the current (Io) and the
power (Po) which can be provided by the associated
apparatus (supply unit).
PoPi, UoUi, IoIi
In addition, the maximum unprotected residual capaci-
tance (Ci) and inductance (Li) of each apparatus (other
than the terminators) connected to the fieldbus line
must be equal or less than 5 nF and 10 H respec-
tively.
Ci5nF, Li10H
Supply unit
The supply unit must be certified by a notify body as
FISCO model and following trapezoidal or rectangular
output characteristic is used.
Uo= 14...17.5 V (I.S. maximum value)
Iobased on spark test result or other assessment.
No specification of Lo and Co is required on the
certificate or label.
Cable
The cable used to interconnect the devices needs to
comply with the following parameters:
Loop resistance Rc: 15...150 Ω/km
Inductance per unit length Lc: 0.4...1 mH/km
Capacitance per unit length Cc: 80...200 nF/km
Length of spur cable: max. 30 m (IIC and IIB)
Length of trunk cable: max. 1 km (IIC) or 5 km
(EEx ia IIB T4)
Terminators
The terminator must be certified by a Notified body as
FISCO model and at each end of the trunk cable an
approved line terminator with the following parameters
is suitable:
R = 90...102 Ω
C = 0...2.2 F (0.8...1.2 F is required in operation)
The resistor must be infallible according to IEC 60079-
11. One of the two allowed terminators might already
be integrated in the associated apparatus (bus supply
unit).
Number of Devices
The number of devices (max. 32) possible on a
fieldbus link depends on factors such as the power
consumption of each device, the type of cable used,
use of repeaters, etc.
Entity Model
Non-Hazardous
Locations Hazardous Locations
F0203.EPS
Terminator
Ex i
Field Instruments
(Passive)
Hand-
held-
Terminal
Supply Unit and
Safety Barrier
Terminator
Data
U
U
I
I.S. fieldbus system complying with Entity model

IM 01C22T02-01E
2-7
2. HANDLING CAUTION
I.S. values Power supply-field device:
Po Pi, UoUi, IoIi
Calculation of max. allowed cable length:
Ccable Co- ∑Ci- ∑Ci(Terminator)
Lcable Lo- ∑Li
Number of Devices
The number of devices (max. 32) possible on a
fieldbus link depends on factors such as the power
consumption of each device, the type of cable used,
use of repeaters, etc.
b. CENELEC ATEX (KEMA) Flameproof Type
Caution for CENELEC (KEMA) Flameproof Type
Note 1. EJA Series differential, gauge, and absolute
pressure transmitters with optional code /KF25
for potentially explosive atmospheres:
•No. KEMA 02ATEX2148
•Applicable standard: EN50014:1997,
EN50018:2000
•Type of Protection and Marking Code:
EEx d IIC T6...T4
Temperature Class: T6 T5 T4
Maximum Process Temperature:
85°C100°C120°C
•Ambient Temperature:
–40 to 80°C(T5)
–40 to 75°C(T4 and T6)
•Enclosure: IP67
Note 2. Electrical Data
•Supply voltage: 32 V dc max.
Output current: 15 mA dc
Note 3. Installation
•All wiring shall comply with local installa-
tion requirements.
•The cable entry devices shall be of a
certified flameproof type, suitable for the
conditions of use.
Note 4. Operation
•Keep the “CAUTION” label to the transmitter.
CAUTION: AFTER DE-ENERGIZING,
DELAY 10 MINUTES BEFORE
OPENING. WHEN THE AMBIENT
TEMP.70°C, USE HEAT-RESISTING
CABLES90°C.
•Take care not to generate mechanical
sparking when accessing the instrument and
peripheral devices in a hazardous location.
Note 5. Maintenance and Repair
•The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric Corpo-
ration is prohibited and will void KEMA
Flameproof Certification.
c. CENELEC ATEX Type of Protection “n”
Model EJA Series differential, gauge, and absolute
pressure transmitters with optional code /KN25.
WARNING
When using a power supply not having a
nonincendive circuit, please pay attention not to
ignite in the surrounding flammable atmosphere.
In such a case, we recommend using wiring
metal conduit in order to prevent the ignition.
•Applicable standard: EN60079-15:2003, EN60529
•Referential standard: IEC60079-0:1998, IEC60079-
11:1999
•Type of Protection and Marking Code:
EEx nL IIC T4
•Group: II
•Category: 3G
•Ambient Temperature: –40 to 60°C
•Ambient humidity: 0 to 100%RH (No condensation)
•Enclosure: IP67
Note 1. Electrical Data
Ui = 32 Vdc
Ci = 3.52 nF
Li = 0 µH
Note 2. Installation
•All wiring shall comply with local installation
requirements. (refer to the installation diagram)

IM 01C22T02-01E
2-8
2. HANDLING CAUTION
Note 3. Maintenance and Repair
•The instrument modification or parts replacement by
other than authorized representative of Yokogawa
Electric Corporation is prohibited and will void
Type of Protection “n”.
Safe Area
Hazardous Area
F0208.EPS
Terminator
Terminator
Field Instruments
EJA
Pressure
Transmitter
Field Instruments
[EEx nL]
Supply Unit






Vmax = 32 Vdc
Ci = 3.52 nF
Li = 0 H
(2) Electrical Connection
A mark indicating the electrical connection type is
stamped near the electrical connection port. These
marks are as follows.
T0201.EPS
F0200.EPS
Location of the marking
(3) Installation
WARNING
•All wiring shall comply with local installation
requirements and the local electrical code.
•There is no need for a conduit seal in Division
1 and Division 2 hazardous locations because
this product is sealed at factory.
(4) Operation
WARNING
•OPEN CIRCUIT BEFORE REMOVING
COVER. INSTALL IN ACCORDANCE WITH
THIS USER’S MANUAL
•Take care not to generate mechanical sparking
when accessing the instrument and peripheral
devices in a hazardous locations.
(5) Maintenance and Repair
WARNING
The instrument modification or parts replacement
by other than authorized Representative of
Yokogawa Electric Corporation is prohibited and
will void the certification.

IM 01C22T02-01E
2-9
2. HANDLING CAUTION
(6) Name Plate
 Name plate
 Tag plate for intrinsically safe type
 Tag plate for flameproof type
F0298.EPS
No. KEMA 02ATEX1344 X
EEx ia C T4
Ui17.5V Ii360mA Pi2.52W Ci1.76nF Li0
or Ui24.0V Ii250mA Pi1.2W Ci1.76nF Li0
EEx ia B T4
Ui17.5V Ii380mA Pi5.32W Ci1.76nF Li0
ENCLOSURE:IP67 Tamb –40 TO 60
°
C PROCESS TEMP. 120
°
C
1
KS25
MODEL: Specified model code.
STYLE: Style code.
SUFFIX: Specified suffix code.
SUPPLY: Supply voltage.
OUTPUT: Output signal.
MWP: Maximum working pressure.
CAL RNG: Specified calibration range.
DISP MODE: Specified display mode.
OUTPUT MODE: Specified output mode.
NO.: Serial number and year of production*1.
TOKYO 180-8750 JAPAN:
The manufacturer name and the address*2.
*1: The first digit in the final three numbers of the
serial number appearing after “NO.” on the name
plate indicates the year of production. The follow-
ing is an example of a serial number for a product
that was produced in 2001:
The year 2001
12A819857 132
*2: “180-8750” is the zip code for the following
address.
2-9-32 Nakacho, Musashino-shi, Tokyo Japan
2.1.4 IECEx Certification
a. IECEx Flameproof Type
Caution for IECEx flameproof type.
Note 1. Model EJA Series differential, gauge, and
absolute pressure transmitters with optional code /
SF25 are applicable for use in hazardous locations:
• No. IECEx KEM 06.0005
• Applicable Standard: IEC60079-0:2004,
IEC60079-1:2003
• Type of Protection and Marking Code:
Ex d IIC T6...T4
• Enclosure: IP67
• Maximum Process Temperature: 120°C (T4),
100°C (T5), 85°C (T6)
• Ambient Temperature: –40 to 75°C (T4), –40 to
80°C (T5), –40 to 75°C (T6)
• Supply Voltage: 42 V dc max.
• Output Signal: 4 to 20 mA dc
Note 2. Wiring
• In hazardous locations, the cable entry devices shall
be of a certified flameproof type, suitable for the
conditions of use and correctly installed.
• Unused apertures shall be closed with suitable
flameproof certified blanking elements. (The plug
attached is certificated as the flame proof IP67 as a
part of this apparatus.)
• In case of ANSI 1/2 NPT plug, ANSI hexagonal
wrench should be applied to screw in.
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 10 MINUTES
BEFORE OPENING.
• WARNING:
WHEN AMBIENT TEMPERATURE ≥70°C,
USE THE HEAT-RESISTING CABLES ≥90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 4. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void IECEx Certification.

IM 01C22T02-01E
3-1
3. ABOUT FIELDBUS
3. ABOUT FIELDBUS
3.1 Outline
Fieldbus is a bi-directional digital communication
protocol for field devices, which offers an advancement in
implementation technologies for process control systems
and is widely employed by numerous field devices.
EJA Series Fieldbus communication type employs the
specification standardized by The Fieldbus Foundation,
and provides interoperability between Yokogawa
devices and those produced by other manufacturers.
Fieldbus comes with software consisting of two AI
function blocks, providing the means to implement a
flexible instrumentation system.
For information on other features, engineering, design,
construction work, startup and maintenance of
Fieldbus, refer to “Fieldbus Technical Information” (TI
38K03A01-01E).
3.2 Internal Structure of EJA
The EJA contains two virtual field devices (VFD) that
share the following functions.
3.2.1 System/network Management VFD
•Sets node addresses and Phisical Device tags (PD
Tag) necessary for communication.
•Controls the execution of function blocks.
•Manages operation parameters and communication
resources (Virtual Communication Relationship:
VCR).
3.2.2 Function Block VFD
(1)Resource block
•Manages the status of EJA hardware.
•Automatically informs the host of any detected
faults or other problems.
(2)Transducer block
•Converts sensor output to pressure signals and
transfers to AI function block.
(3)AI1 function block
•Conditions raw data from the Transducer block.
•Outputs differential pressure signals.
•Carries out scaling, damping and square root
extraction.
(4)AI2 function block
•Outputs static pressure signals.
(5)PID function block
•Performs the PID control computation based on the
deviation of the measured value from the setpoint.
3.3 Logical Structure of Each
Block
F0301.EPS
EJA
Fieldbus System/network management VFD
Function block VFD
Link Master (option)
PD Tag
Sensor
input
Resource block
Block tag
Parameters
PID function
block (option)
Communication
parameters
VCR
Node address
Function block
execution schedule
AI function
block
Output
AI function
block
Block tag
OUT
Parameters
Transducer
block
Block tag
Parameters
Sensor
Figure 3.1 Logical Structure of Each Block
Setting of various parameters, node addresses, and PD
Tags shown in Figure 3.1 is required before starting
operation.
3.4 Wiring System Configuration
The number of devices that can be connected to a
single bus and the cable length vary depending on
system design. When constructing systems, both the
basic and overall design must be carefully considered
to achieve optimal performance.

IM 01C22T02-01E
4-1
4. GETTING STARTED
4. GETTING STARTED
Fieldbus is fully dependent upon digital communica-
tion protocol and differs in operation from conven-
tional 4 to 20 mA transmission and the BRAIN
communication protocol. It is recommended that
novice users use field devices in accordance with the
procedures described in this section. The procedures
assume that field devices will be set up on a bench or
in an instrument shop.
4.1 Connection of Devices
The following instruments are required for use with
Fieldbus devices:
•Power supply:
Fieldbus requires a dedicated power supply. It is
recommended that current capacity be well over the
total value of the maximum current consumed by all
devices (including the host). Conventional DC
current cannot be used as is.
•Terminator:
Fieldbus requires two terminators. Refer to the
supplier for details of terminators that are attached
to the host.
•Field devices:
Connect Fieldbus communication type EJA. Two or
more EJA devices or other devices can be con-
nected.
•Host:
Used for accessing field devices. A dedicated host
(such as DCS) is used for an instrumentation line
while dedicated communication tools are used for
experimental purposes. For operation of the host,
refer to the instruction manual for each host. No
other details on the host are given in this material.
•Cable:
Used for connecting devices. Refer to “Fieldbus
Technical Information” (TI 38K03A01-01E) for
details of instrumentation cabling. For laboratory or
other experimental use, a twisted pair cable two to
three meters in length with a cross section of 0.9
mm2or more and a cycle period of within 5 cm
(2 inches) may be used. Termination processing
depends on the type of device being deployed. For
EJA, use an M4 screw terminal claw. Some hosts
require a connector.
Refer to Yokogawa when making arrangements to
purchase the recommended equipment.
Connect the devices as shown in Figure 4.1. Connect
the terminators at both ends of the trunk, with a
minimum length of the spur laid for connection.
The polarity of signal and power must be maintained.
EJA
Fieldbus power
supply
Terminator
Terminator
HOST
F0401.EPS
Figure 4.1 Cabling
NOTE
No CHECK terminal is used for Fieldbus com-
munication EJA. Do not connect the field indica-
tor and check meter.
Before using a Fieldbus configuration tool other than
the existing host, confirm it does not affect the loop
functionality in which all devices are already installed
in operation. Disconnect the relevant control loop from
the bus if necessary.
IMPORTANT
Connecting a Fieldbus configuration tool to a
loop with its existing host may cause communi-
cation data scrambling resulting in a functional
disorder or a system failure.

IM 01C22T02-01E
4-2
4. GETTING STARTED
4.2 Host Setting
To activate Fieldbus, the following settings are
required for the host.
IMPORTANT
Do not turn off the power immediately after
setting. When the parameters are saved to the
EEPROM, the redundant processing is executed
for an improvement of reliability. If the power is
turned off within 60 seconds after setting is
made, the modified parameters are not saved
and the settings may return to the original
values.
Table 4.1 Operation Parameters
T0401.EPS
Symbol Parameter Description and Settings
Minimum value of
communication data
intervals. Unit of time is in
octets (256 µs). Set the
maximum specification for
all devices. For EJA, set a
value of 4 or greater.
Indicates the time
necessary for immediate
reply of thje device. Unit of
time is in octets (256 µs).
Set maximum specification
for all devices. For EJA,
set a value of 4 or greater.
Slot-Time
V (ST)
First-Unpolled-Node
Minimum-Inter-PDU-
Delay
Maximum-Reply-
Delay
Unused address range.
Indicate the address next
to the address range used
by the host. Set 0x15 or
greater.
Number-of-
consecutive-
Unpolled-Node
The worst case time
elapsed until a reply is
recorded. The unit is Slot-
time; set the value so that
V (MRD) !V (ST) is the
maximum value of the
specification for all
devices. For EJA, the
setting must be a value of
12 or greater.
V (MRD)
V (MID)
V (FUN)
V (NUN)
Not used
0x00
0xF7
0xF8
0x0F
0x10
0x13
0x14
0xFB
0xFC
0xFF
V(FUN)
V(FUN)V(NUN)
LM device
Bridge device
Unused V(NUN)
Note 1: Bridge device: A linking device which brings data from one
or more H1 networks.
Note 2: LM device: with bus control function (Link Master function)
Note 3: BASIC device: without bus control function
BASIC device
Default address
Portable device address
F0402.EPS
Figure 4.2 Available Address Range