YOKOGAWA FLXA202 User manual

User’s
Manual
TM
TM
FLXA21
2-Wire Analyzer
FOUNDATION Fieldbus
Communication
IM 12A01A02-71E
IM 12A01A02-71E
3rd Edition

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IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
uIntroduction
Thank you for purchasing the FLXATM21 2-Wire Analyzer.
Please read the following respective documents before installing and using the FLXA21.
This manual describes only those topics that are required for operation of the FOUNDATION
Fieldbus communications.
For information about the FLXA21 other than FOUNDATION Fieldbus, refer to the User’s Manual
(IM 12A01A02-01E).
nNotes on Handling User’s Manuals
• Please hand over the user’s manuals to your end users so that they can keep the user’s
manuals on hand for convenient reference.
• Please read the information thoroughly before using the product.
• The purpose of these user’s manuals is not to warrant that the product is well suited to any
particular purpose but rather to describe the functional details of the product.
• No part of the user’s manuals may be transferred or reproduced without prior written
consent from YOKOGAWA.
• YOKOGAWA reserves the right to make improvements in the user’s manuals and product at
any time, without notice or obligation.
• Ifyouhaveanyquestions,oryoundmistakesoromissionsintheuser’smanuals,please
contact our sales representative or your local distributor.
nDrawing Conventions
Somedrawingsmaybepartiallyemphasized,simplied,oromitted,fortheconvenienceof
description.
Somescreenimagesdepictedintheuser’smanualmayhavedi󰀨erentdisplaypositionsor
character types (e.g., the upper / lower case). Also note that some of the images contained in this
user’s manual are display examples.
Media No. IM 12A01A02-71E 3rd Edition : Mar. 2018 (YK)
All Rights Reserved Copyright © 2015, Yokogawa Electric Corporation

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nModel Name used in this Manual
The model names, FLXA21-PH and FLXA21-SC, are used in this manual.
The FLXA21-PH means the FLXA21 with the output of FOUNDATION Fieldbus communication
and with measurement of pH and/or ORP. The exact model & style code is as follows;
 FLXA21-D-P-D-□□-P1-NN-F-N-LA-N-NN (1st input: pH/ORP)
or
 FLXA21-D-P-D-□□-S1-NN-F-N-LA-N-NN (1st input: pH/ORP (SENCOMTM sensor))
And, the FLXA21-SC means the FLXA21 with the output of FOUNDATION Fieldbus
communication and with measurement of conductivity. The exact model & style code is as
follows;
 FLXA21-D-P-D-□□-C1-NN-F-N-LA-N-NN (1st input: Conductivity (SC))
l Model&Su󰀩xCodes
Model Su󰀩xcode Option code Description
FLXA21 ······················································· ·················· 2-Wire Analyzer
Power supply -D ·················· Always -D
Housing -P ·················· Plastic
Display -D ·················· Anti-glare LCD
Type -AB
-AD
-AG
-CB
-CD
-CH
-EG
-DD
··················
··················
··················
··················
··················
··················
··················
··················
General purpose for CE, RCM
General purpose for CSA
General purpose for KC
IS for ATEX, IECEx (Note 5) (Note 7)
IS for FM, CSA (Note 5)
IS for NEPSI (Note 5)
IS for KOSHA (Note 5)
NI for FM, CSA (Note 6)
1st input -P1
-C1
-S1
··················
··················
··················
pH/ORP (Note 3)
Conductivity (SC)
pH/ORP (SENCOM sensor)
2nd input -NN ·················· Without input
Output (Note 1) -F ·················· FOUNDATION Fieldbus
—-N ·················· Always -N
Language set (Note 2) -LA ·················· English and 11 languages
Country -N ·················· Global except Japan
—-NN ·················· Always -NN
Option Mounting hardware
Hood
Tag plate
Conduit adapter
/UM
/U
/PM
/H6
/H7
/H8
/SCT
/CB4
/CD4
/CF4
Universal mounting kit (Note 4)
Pipe and wall mounting hardware
Panel mounting hardware
Hood, stainless steel
Hood, stainless steel + urethane coating
Hood, stainless steel + epoxy coating
Stainless steel tag plate
Conduit adapter (G1/2 x 4 pcs)
Conduit adapter (1/2NPT x 4 pcs)
Conduit adapter (M20 x 1.5 x 4 pcs)
Notes:
1:TheFLXA21hasanotheroutputtypeof“4-20mA+HART”(su󰀩xcode:-A).RefertoIM12A01A02-01E.
2: These languages are message languages on the analyzer’s display.
One analyzer has English and 11 languages.
All languages are as follows; English, Chinese, Czech, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian
and Spanish.
3: This input is to be come from an analog pH/ORP sensor.
4: The universal mounting kit contains the pipe and wall mounting hardware (/U) and the panel mounting hardware (/PM).
5: Type “-CB”, “-CD”, “-CH”, “-EG” are intrinsic safety (IS).
6: Type “-DD” is nonincendive (NI).
7: Product registration is done by Yokogawa Taiwan Corporation as an importer in Taiwan.

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uSafety Precautions
n Safety,Protection,andModicationoftheProduct
• In order to protect the system controlled by the product and the product itself and ensure
safe operation, observe the safety precautions described in this user’s manual. We assume
no liability for safety if users fail to observe these instructions when operating the product.
• Ifthisinstrumentisusedinamannernotspeciedinthisuser’smanual,theprotection
provided by this instrument may be impaired.
• If any protection or safety circuit is required for the system controlled by the product or for
the product itself, prepare it separately.
• Be sure to use the spare parts approved by Yokogawa Electric Corporation (hereafter
simply referred to as YOKOGAWA) when replacing parts or consumables.
• Modicationoftheproductisstrictlyprohibited.
• The following words are used this manual.
CAUTION
This symbol gives information essential for understanding the operations and functions.
NOTE
This symbol indicates information that complements the present topic.
nWarning and Disclaimer
The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor
responsibility to any person or entity with respect to any direct or indirect loss or damage arising
from using the product or any defect of the product that YOKOGAWA can not predict in advance.

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nFLXA21
• The FLXA21 should only be used with equipment that meets the relevant IEC, American,
Canadian, and Japanese standards. Yokogawa accepts no responsibility for the misuse of
this unit.
• Don’t install “general purpose type” instruments in the hazardous area.
• The Instrument is packed carefully with shock absorbing materials, nevertheless, the
instrument may be damaged or broken if subjected to strong shock, such as if the
instrument is dropped. Handle with care.
CAUTION
Electrostatic discharge
The FLXA21 contains devices that can be damaged by electrostatic discharge.
When servicing this equipment, please observe proper procedures to prevent such damage.
Replacement components should be shipped in conductive packaging. Repair work should
be done at grounded workstations using grounded soldering irons and wrist straps to avoid
electrostatic discharge.
CAUTION
• Do not use an abrasive or organic solvent in cleaning the instrument.
• Substitution of components may impair suitability for Division 2.
Do not remove or replace while circuit is live unless area is known to be non-hazardous.
Explosion Hazard – Do not disconnect equipment unless area is known to be
nonhazardous.
Do not reset circuit breaker unless power has been removed from the equipment or the area
is known to be non-hazardous.
CAUTION
This instrument is a EN61326-1 Class A product, and it is designed for use in the industrial
environment. Please use this instrument in the industrial environment only.
CAUTION
When you open the front panel, make sure the screws are completely out of the screw holes, and
then open the front panel slowly in order not to damage the threaded parts on the housing. If the
threaded parts are damaged and the screws cannot be tightened, the waterproof performance
will deteriorate.
CAUTION
Be careful to touch the concentrated sulfuric acid.

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nMark position of intrinsic safety
The mark position of intrinsic safety is shown as follows
FLXA21-D-P-D-CB-□1-NN-F-N-LA-N-NN(FOUNDATIONFieldbus)
FLXA21-D-P-D-CD-□1-NN-F-N-LA-N-NN(FOUNDATIONFieldbus)
FLXA21-D-P-D-DD-□1-NN-F-N-LA-N-NN(FOUNDATIONFieldbus)
FLXA21-D-P-D-CH-□1-NN-F-N-LA-N-NN(FOUNDATIONFieldbus)
FLXA21-D-P-D-EG-□1-NN-F-N-LA-N-NN(FOUNDATIONFieldbus)
*2
*1
*4
*3
*7
*6
*5
*8
Type: -CB
Type: -CD Type: -DD Type: -CH
*1: This marking conforms to Intrinsic safety of IECEx.
*2: This marking conforms to Intrinsic safety of ATEX.
*3: This marking conforms to Intrinsic safety of CSA.
*4: This marking conforms to Intrinsic safety of FM.
*5: This marking conforms to nonincendive of CSA.
*6: This marking conforms to nonincendive of FM.
*7: This marking conforms to Intrinsic safety of NEPSI.
*8: This marking conforms to Intrinsic safety of KOSHA.
Type:-EG
-F (FOUNDATION Fieldbus)-F (FOUNDATION Fieldbus)

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nProduct Disposal:
The instrument should be disposed of in accordance with local and national legislation/
regulations.
nWarranty and service
Yokogawa products and parts are guaranteed free from defects in workmanship and material
under normal use and service for a period of (typically) 12 months from the date of shipment from
the manufacturer.
Individual sales organisations can deviate from the typical warranty period, and the conditions of
sale relating to the original purchase order should be consulted. Damage caused by wear and
tear,inadequatemaintenance,corrosion,orbythee󰀨ectsofchemicalprocessesareexcluded
from this warranty coverage.
In the event of warranty claim, the defective goods should be sent (freight paid) to the service
department of the relevant sales organisation for repair or replacement (at Yokogawa discretion).
The following information must be included in the letter accompanying the returned goods:
• Part number, model code and serial number
• Original purchase order and date
• Length of time in service and a description of the process
• Description of the fault, and the circumstances of failure
• Process/environmental conditions that may be related to the failure of the device.
• A statement whether warranty or nonwarranty service is requested
• Complete shipping and billing instructions for return of material, plus the name and phone
number of a contact person who can be reached for further information.
Returnedgoodsthathavebeenincontactwithprocessuidsmustbedecontaminated/
disinfectedbeforeshipment.Goodsshouldcarryacerticatetothise󰀨ect,forthehealthand
safety of our employees.
Material safety data sheets should also be included for all components of the processes to which
the equipment has been exposed.

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nCopyright and Trademark Notices
The copyrights of online manual contained in the CD-ROM are reserved.
TheonlinemanualisprotectedbythePDFsecurityfrommodication,however,itcanbeoutput
via a printer. Printing out the online manual is only allowed for the purpose of using the product.
When using the printed information of the online manual, check if the version is the most recent
one by referring to the CD-ROM’s version.
No part of the online manual may be transferred, sold, distributed (including delivery via a
commercial PC network or the like), or registered or recorded on video tapes.
FLEXA, FLXA and SENCOM are trademarks or registered trademarks of Yokogawa Electric
Corporation.
Adobe, Acrobat and Acrobat Reader are either registered trademarks or trademarks of Adobe
Systems Incorporated in the United States and/or other countries.
All other company and product names mentioned in this user’s manual are trademarks or
registered trademarks of their respective companies.
We do not use TM or ® mark to indicate those trademarks or registered trademarks in this user’s
manual.
lFLXA21’s fonts
(c) Copyright 2000-2001 /efont/ The Electronic Font Open Laboratory. All rights reserved.
Redistributionanduseinsourceandbinaryforms,withorwithoutmodication,arepermitted
provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials provided
with the distribution.
3. Neither the name of the team nor the names of its contributors may be used to endorse or
promoteproductsderivedfromthisfontwithoutspecicpriorwrittenpermission.
THIS FONT IS PROVIDED BY THE TEAM AND CONTRIBUTORS “AS IS” AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE TEAM OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS FONT, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.

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uCE marking products
nAuthorised Representative in EEA
The Authorised Representative for this product in EEA is Yokogawa Europe B.V. (Euroweg 2,
3825 HD Amersfoort, The Netherlands).
n IdenticationTag
Thismanualandtheidenticationtagattachedonapackingboxareessentialpartsofthe
product.
Keep them together in a safe place for future reference.
nUsers
This product is designed to be used by a person with specialized knowledge.
nHow to dispose the batteries:
This is an explanation about the EU Battery Directive. This directive is only valid in the EU.
Batteries are included in this product. Batteries incorporated into this product cannot be removed
by yourself. Dispose them together with this product.
WhenyoudisposethisproductintheEU,contactyourlocalYokogawaEuropeB.V.o󰀩ce.Donot
dispose them as domestic household waste.
Battery type: Manganese dioxide lithium battery
Notice:
The symbol (see above) means they shall be sorted out and collected as ordained in the EU
Battery Directive.
nInformation of the WEEE Directive
Thisproductispurposelydesignedtobeusedinalargescalexedinstallationsonlyand,
therefore, is out of scope of the WEEE Directive. The WEEE Directive does not apply. This
product should be disposed in accordance with local and national legislation/regulations.
The WEEE Directive is only valid in the EU.

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IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
FLXA21
2-Wire Analyzer
FOUNDATION Fieldbus Communication
CONTENTS
IM 12A01A02-71E 3rd Edition
uIntroduction....................................................................................................i
uSafety Precautions ......................................................................................iii
uCE marking products................................................................................viii
1. About FOUNDATION Fieldbus ................................................................ 1-1
1.1 Internal Structure of FLXA21 ........................................................................... 1-1
1.2 Logical Structure of Each BLOCK .................................................................. 1-2
1.3 WiringSystemConguration .......................................................................... 1-2
1.4 Regulatory Compliance.................................................................................... 1-2
2. Preparation................................................................................................ 2-1
2.1 Cables, terminals and glands for FOUNDATION Fieldbus........................... 2-1
2.2 Shielding and grounding ................................................................................. 2-3
2.3 How to download DD for CFF .......................................................................... 2-3
3. Getting started .......................................................................................... 3-1
3.1 Connection of Devices ..................................................................................... 3-1
3.2 Host Setting ....................................................................................................... 3-2
3.3 Bus Power ON ................................................................................................... 3-3
3.4 Integration of DD ............................................................................................... 3-3
3.5 Set the parameters using DTM ........................................................................ 3-3
3.6 Reading the Parameters................................................................................... 3-4
3.7 Continuous Record of Values.......................................................................... 3-4
3.8 Generation of Alarm.......................................................................................... 3-4
3.9
PRIMARY/SECONDARY/TERTIARY/QUATERNARY_VALUE Value Assignment .... 3-4
4. Conguration............................................................................................ 4-1
4.1 Network Design................................................................................................. 4-1
4.2 NetworkDenition ............................................................................................ 4-2
4.3 DenitionofCombiningFunctionBlocks...................................................... 4-3
4.4 Setting of Tags and Addresses ....................................................................... 4-4
4.5 Communication Setting ................................................................................... 4-5
4.5.1 VCR Setting ....................................................................................... 4-5
4.5.2 Function Block Execution Control...................................................... 4-8
4.6 Block Setting ..................................................................................................... 4-8
4.6.1 Link Object ......................................................................................... 4-8
4.6.2 Trend Object ...................................................................................... 4-8

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4.6.3 View Object ........................................................................................ 4-9
5. ExplanationofBasicItems...................................................................... 5-1
5.1 AI Function Block.............................................................................................. 5-1
5.1.1 Function Blocks.................................................................................. 5-1
5.1.2 MODE_BLK ....................................................................................... 5-1
5.1.3 CHANNEL.......................................................................................... 5-2
5.1.4 XD_SCALE/OUT_SCALE ................................................................. 5-2
5.1.5 L_TYPE.............................................................................................. 5-3
5.1.6 PV_FTIME ......................................................................................... 5-3
5.1.7 Alarm Priority...................................................................................... 5-3
5.1.8 Alarm Threshold................................................................................. 5-3
5.1.9 IO_OPTS ........................................................................................... 5-3
5.1.10 STATUS_OPT.................................................................................... 5-4
5.2 Sensor Transducer Block ................................................................................ 5-4
5.2.1 MODE_BLK ....................................................................................... 5-4
5.2.2 BLOCK_ERR ..................................................................................... 5-5
5.2.3 XD_ERROR....................................................................................... 5-5
6. In-process operation................................................................................ 6-1
6.1 Mode Transition ................................................................................................ 6-1
6.2 Generation of Alarm.......................................................................................... 6-1
6.3 Simulation Function ......................................................................................... 6-4
6.4 Write lock (Write-protect) function.................................................................. 6-4
7. List of parameters for each block of the FLXA21 ................................. 7-1
7.1 Resource Block................................................................................................. 7-2
7.2 Analog input Block ........................................................................................... 7-9
7.3 Sensor Transducer Block .............................................................................. 7-12
8. Diagnostic Information ............................................................................ 8-1
8.1 DEVICE STATUS................................................................................................ 8-1
8.2 Status of each parameter in failure mode FLXA21-PH ............................... 8-14
8.3 Status of each parameter in failure mode FLXA21-SC ............................... 8-21
Appendix1 LinkMasterFunctions....................................................... App.1-1
Appendix2 SoftwareDownload............................................................ App.2-1
Appendix3 ControlDrawings ............................................................... App.3-1
App.3.1ATEXandIECExFLXA21:Intrinsicsafety“ia”.....................................App.3-1
App. 3.2 FM FLXA21: Intrinsic safety, Nonincendive..........................................App.3-3
App. 3.3 CSA FLXA21: Intrinsic safety, Nonincendive........................................App.3-6
App.3.4NEPSIandKOSHAFLXA21:Intrinsicsafety“ia”.................................App.3-9
Revision Record.......................................................................................................i
App.3.1ATEXandIECExFLXA21:Intrinsicsafety“ia”.....................................App.3-1
App. 3.2 FM FLXA21: Intrinsic safety, Nonincendive..........................................App.3-3
App. 3.3 CSA FLXA21: Intrinsic safety, Nonincendive........................................App.3-6
App.3.4NEPSIandKOSHAFLXA21:Intrinsicsafety“ia”.................................App.3-9

<1. About FOUNDATION Fieldbus> 1-1
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
1. About FOUNDATION Fieldbus
FOUNDATIONFieldbusisabi-directionaldigitalcommunicationprotocolforelddevices,which
o󰀨ersanadvancementimplementationtechnologiesforprocesscontrolsystemsandiswidely
employedbynumerouselddevices.
FLXA21FOUNDATIONFieldbuscommunicationtypeemploysthespecicationstandardized
by The FOUNDATION Fieldbus, and provides interoperability between Yokogawa devices and
those produced by other manufacturers. FOUNDATION Fieldbus comes with software consisting
ofthreeAIfunctionblocks,providingthemeanstoimplementexibleinstrumentationsystem.
For information on other features, engineering, design, construction work, startup and
maintenance of FOUNDATION Fieldbus, refer to http://www.yokogawa.com/fbs/fbs-index.htm.
1.1 Internal Structure of FLXA21
TheFLXA21containstwovirtualelddevices(VFD)thatsharethefollowingfunctions.
nSystem/network Management VFD
• Sets node addresses and Physical Device tags (PD Tag) necessary for communication
• Controls the execution of function blocks
• Manages operation parameters and communication resources (Virtual Communication
Relationship: VCR)
nFunction Block VFD
lResource block
• Manages the status of FLXA21 hardware
• Automatically informs the host of any detected faults or other problems
lSensor Transducer block
• Converts sensor output to process values and transfers to AI function block by channels
lAI1, AI2, AI3 function block
• Conditions raw data from the Sensor Transducer block
• Outputs conditioned process values
• Carries out scaling, damping and square root extraction

<1. About FOUNDATION Fieldbus> 1-2
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
1.2 Logical Structure of Each BLOCK
System/network management VFD
Function block VFD
PD Tag
Sensor
input
Resource block
Block tag
Parameters
Communication
parameters
VCR
Node address
Function block
execution schedule
AI function
block
AI function
block
Output
AI function
block
Block tag
OUT
Parameters
SENSOR
Transducer block
Block tag
Parameters
Sensor
Figure 1.1 Logical Structure of Each Block
Setting of various parameters, node addresses, and PD Tags shown in Figure 1.1 is required
before starting operation.
1.3 WiringSystemConguration
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 allow device performance to be fully exhibited.
1.4 Regulatory Compliance
lSafety, EMC and RoHS Compliance
Safety: UL 61010-1
UL 61010-2-030
CAN/CSA-C22.2 No.61010-1
CAN/CSA-C22.2 No.61010-2-030
EN61010-1
EN61010-2-030
EMC: EN61326-1 Class A, Table 2 (For use in industrial locations)
   Inuenceofimmunityenvironment(CriteriaA):Outputshiftisspeciedwithin±25%ofF.S.
EN61326-2-3
EN61326-2-5
RCM: EN61326-1 Class A, Table 2

<1. About FOUNDATION Fieldbus> 1-3
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
Korea Electromagnetic Conformity Standard Class A 한국 전자파적합성 기준
A급 기기 (업무용 방송통신기자재)
이 기기는 업무용(A급) 전자파적합기기로서 판매자 또는
사용자는 이 점을 주의하시기 바라며, 가정외의 지역에서
사용하는 것을 목적으로 합니다.
RoHS: EN 50581: 2012 (Style 3.03 or newer)
Installation altitude: 2000 m or less
Category based on IEC 61010: I (Note 1)
Pollution degree based on IEC 61010: 2 (Note 2)
Note1: Installationcategory,calledover-voltagecategory,speciesimpulsewithstandvoltage.
Equipment with “Category I” (ex. two-wire transmitter) is used for connection to circuits in which measures are taken
to limit transient over-voltages to an appropriately low level.
Note 2: Pollution degree indicates the degree of existence of solid, liquid, gas or other inclusions which may reduce
dielectric strength. Degree 2 is the normal indoor environment.
l ExplosionProtectedTypeCompliance
Item Description 'Type' in MS code
Europe
(ATEX)
[Intrinsic safety “ia”]
Applicable Standard: EN 60079-0: 2012 + A11: 2013, EN 60079-11: 2012
CerticateNo: DEKRA11ATEX0109X
Marking/Rating: II1GExiaIICT4Ga,FISCOelddevice
Ambient Temperature: -20 to 55°C
Control Drawing: Refer to App. 3.1
-CB
International
(IECEx)
[Intrinsic safety “ia”]
Applicable Standard: IEC 60079-0: 2011, IEC 60079-11: 2011
CerticateNo: IECExDEK11.0044X
Marking/Rating: ExiaIICT4Ga,FISCOelddevice
Ambient Temperature: -20 to 55°C
Control Drawing: Refer to App. 3.1
United
States (FM)
[Intrinsically safe / Nonincendive]
Applicable Standard: Class 3600: 2011, Class 3610: 2010,
Class 3611: 2004, Class 3810:2005,
NEMA 250: 2014, ANSI/ISA 60079-0: 2013,
ANSI/ISA 60079-11: 2014
CerticateNo: 3039632
Marking/Rating: IS CL I, DIV 1, GP ABCD CL I, ZN 0, AEx ia IIC
NI CL I, DIV 2, GP ABCD CL I, ZN 2 IIC
FISCOelddevice
T4: for ambient temperature: -20 to 55°C
Enclosure: Type 4X
Control Drawing: Refer to App. 3.2
-CD
Canada
(CSA)
[Intrinsically safe / Nonincendive]
Applicable Standard: C22.2 No.0-10 (R2015),
CAN/CSA-C22.2 No.94-M91 (R2011),
C22.2 No.213-M1987 (R2013),
CAN/CSA-C22.2 No.60079-0:11,
CAN/CSA-C22.2 No.60079-11:14,
CAN/CSA-C22.2 No.61010-1-12,
CAN/CSA-C22.2 No.61010-2-030-12
CerticateNo: 2425510
Marking/Rating: ExiaIICT4Ga,FISCOelddevice
Intrinsicaly safe for Class I, Division 1, Groups A, B,
C, D, T4
Nonincendive for Class I, Division 2, Groups A, B,
C, D, T4
Ambient Temperature: -20 to 55°C
AmbientHumidity: 0–100%(NoCondensation)
Enclosure: IP66, NEMA 4X
Control Drawing: Refer to App. 3.3

<1. About FOUNDATION Fieldbus> 1-4
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
Item Description 'Type' in MS code
United
States (FM)
[Nonincendive]
Applicable Standard: Class 3600: 2011, Class 3611: 2004,
Class 3810: 2005, NEMA 250: 2014
CerticateNo: 3039632
Marking/Rating: NI CL I, DIV 2, GP ABCD ZN 2 IIC
T4: for ambient temperature: -20 to 55°C
Control Drawing: Refer to App. 3.2
-DD
Canada
(CSA)
[Nonincendive]
Applicable Standard: C22.2 No.0-10 (R2015),
CAN/CSA-C22.2 No.94-M91 (R2011),
C22.2 No.213-M1987 (R2013),
CAN/CSA-C22.2 No.61010-1-12,
CAN/CSA-C22.2 No.61010-2-030-12
CerticateNo: 2425510
Marking/Rating: Nonincendive for Class I, Division 2, Groups A, B,
C, D, T4
Ambient Temperature: -20 to 55°C
AmbientHumidity: 0–100%(NoCondensation)
Enclosure: IP66, NEMA 4X
Control Drawing: Refer to App. 3.3
China
(NEPSI)
[Intrinsic safety “ia”]
Applicable Standard: GB3836.1-2010, GB3836.4-2010,
GB 3836.20-2010
CerticateNo: GYJ18.1051X
Marking/Rating: ExiaIICT4Ga,FISCOelddevice
Ambient Temperature: -20 to 55°C
Control Drawing: Refer to App. 3.4
-CH
Korea
(KOSHA)
[Intrinsic safety “ia”]
Applicable Standard: Notice of Ministry of Labor No. 2016-54
CerticateNo: 15-AV4BO-0160X
Marking/Rating: ExiaIICT4,FISCOelddevice
Ambient Temperature: -20 to 55°C
Control Drawing: Refer to App. 3.4
-EG

<2. Preparation> 2-1
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
2. Preparation
TheFLXA21FOUNDATIONFieldbusisprovidedwiththreecableglands.Therstisusedforthe
electrode wiring as the other is used for the power wiring shown in Figure 2.1.
For sensor cable
For power supply
For grounding cable
Figure 2.1 Cable gland diagram
2.1 Cables, terminals and glands for
FOUNDATION Fieldbus
Wire and install the system by referring to chapter 2 in the FLXA21 instruction manual (IM
12A01A02-01E).
The FOUNDATION Fieldbus power supply is 9 to 32 V DC. The wiring is the same.
However, for the FOUNDATION Fieldbus cables, see Table 2.1.
Table 2.1 FOUNDATION Fieldbus Cables and transmissible Length
Parameters Conditions Type A Type B Type C Type D
MaxDCResistance,Ω/km per conductor 22 56 132 20
Max Attenuation, dB/km 1.25 f, (39 kHz) 3.0 5.0 8.0 8.0
Gauge —#18 AWG
(0.82 mm2)
#22 AWG
(0.32 mm2)
#26 AWG
(0.13 mm2)
#16 AWG
(1.25 mm2)
Max Length, meters —1,900 1,200 400 200
Note: 1900 m is trunk + sum of Spurs (Max length type A cable)
Yokogawa recommends the use of Type A.
Usage of Type B and D is restricted.
Yokogawa does not recommend the use of Type C.
Table 2.2 Recommended length of Spur Cables
Number of spur cables Length of a non-intrinsically
safe spur cable
15-16 60 m
13-14 90 m
1-12 120 m
Note: • 1 device per spur.
• Keep as short as possible (min 1 m)

<2. Preparation> 2-2
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
lWhen using a SENCOM module
WhenusingaSENCOMmodule,youneedtousethesuppliedcableclamptoxthesensor
cables in place. Attach the supplied cable clamp as shown in Figure 2.2.
Sensor cable
Cable cramp
Figure 2.2 When using a SENCOM module
lDIP switches
Figure 2.3 shows the DIP switches for setting the address and write protection.
Normally, you do not have the change them from the default settings.
Write protection switch (Default: OFF)
Address switch
(Default: Hardware address is disabled)
ON
OFF
1: Write protect
2: Simulate (only for FOUNDATION Fieldbus)
1
ON
OFF
2
1 2
3 4 5 6 7 8
7
Address bit
6 5 4 3 2 1 0
Figure 2.3 DIP switches

<2. Preparation> 2-3
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
2.2 Shielding and grounding
Grounding and shielding of FLXA21 is necessary for a safe and reliable operation. Please use
one of the following schemes (A or B) as these will give proper shielding and grounding. One
should pay special attention to instruments that required an external power supply (besides the 9
to 32 V supplied by the bus).
Power
unit
trunck cable Spur
Spur
FLXA21
Field
device
Junction
box
V1
V3
V2
V4
V1 = V2 = V3 = V4
Potential equalisation line (German practice)
Power
unit
trunck cable Spur
Spur
FLXA21
Field
device
Junction
box
High integrity earth, 0.1R or better
Neutral star-point bonding (English practice)
A
B
Figure 2.4 Shield and grounding
2.3 How to download DD for CFF
IfyoudonothavetheDDorCapabilityle(CFF)les,youcandownloadthemfromourwebsite.
http://www.yokogawa.com/an/download/an-dl-eldbus-001en.htm
*: This address is subject to change without prior notice. If the above address cannot be
accessed,consultyournearestsaleso󰀩ceortheagencyfromwhichyoupurchasedthe
product.

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<3. Getting started> 3-1
IM 12A01A02-71E 3rd Edition : Mar. 23, 2018-00
3. Getting started
FOUNDATIONFieldbusisfullydependentupondigitalcommunicationprotocolanddi󰀨ersin
operation from conventional 4 to 20 mA transmission communication protocol. It is recommended
thatnoviceusersuseelddevicesinaccordancewiththeproceduresdescribedinthissection.
Theproceduresassumethatelddeviceswillbesetuponabenchoraninstrumentshop.
3.1 Connection of Devices
The following instruments are required for use with FOUNDATION Fieldbus devices:
• Power supply
FOUNDATION 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
FOUNDATION Fieldbus requires two terminators. Refer to the supplier for details of
terminators that are attached to the host.
• Field devices
Connect FLXA21 FOUNDATION Fieldbus communication type.
Two or more FLXA21 devices or other devices can be connected.
• Host
 Usedforaccessingeld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 details
of the host are explained in the rest of this material.
• Cable
Used for connecting devices. Refer to “Fieldbus Technical Information” (TI 38K03A01-01E)
for details of instrumentation cabling.
FOUNDATION Fieldbus uses twisted pair wires. To meet the Electro Magnetic Interference
standards a shielded twisted pair is obligated.
Refer to Yokogawa when making arrangements to purchase the recommended equipment.
Connect the devices as shown in Figure 3.1. 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.
Fieldbus
power supply
Terminator
Terminator HOST
Terminator
Figure 3.1 Cabling
NOTE
BeforeusingaFOUNDATIONFieldbuscongurationtoolotherthantheexistinghost,conrm
itdoesnota󰀨ecttheloopfunctionalityinwhichalldevicesarealreadyinstalledinoperation.
Disconnect the relevant control loop from the bus if necessary.