YOKOGAWA YFGW520 User manual

User’s
Manual YFGW520
Field Wireless Access Point
Read Me First
IM 01W02E02-11EN
IM 01W02E02-11EN
3rd Edition
This document species the important information to use this product correctly and
safely and the License Agreement of Attached Software for YFGW520 Field Wireless Ac-
cess Point.
Before use the product, be sure to read this document rst.
The conguration of the eld wireless system is described in User’s Manual of the
YFGW410 Field Wireless Management Station (IM 01W02D01-01EN). Read that document
rst.
Contents
Introduction...................................................................................................2
Safety Precautions .......................................................................................3
Explosion Protected Type Specications ...............................................11
Installation of an Explosion Protected Instrument ......................... 12
FM Approval (United States)............................................................... 14
FM Approval (Canada)......................................................................... 17
ATEX ...................................................................................................... 21
IECEx ..................................................................................................... 28
Ground Cable Connection .................................................................. 36
How to Use Online Manual ....................................................................... 37
Preparation to Use YFGW520 Attached Software ................................. 37
Copyright and Trademark Notices .......................................................... 38
Patent Notice ............................................................................................. 38
Open Source Software ............................................................................. 39
About User’s Manual ................................................................................ 39
Information of User’s Manual Revision .................................................. 40
Field Wireless Access Point Setup Tool
Software License Agreement................................................................... 41

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Introduction
This manual (IM 01W02E02-11EN) describes the safety precautions, explosion protected
type specications and the license agreement of attached software for the YFGW520.
There are three documents including this one for the YFGW520 listed below. Read them
along with this manual.
Document No. Document name Description
IM 01W02E02-01EN YFGW520
Field Wireless Access Point
This manual is stored in the attached DVD-ROM for
YFGW520. It describes installation, wiring, operation,
maintenance and specication of the YFGW520.
IM 01W02E02-11EN YFGW520
Field Wireless Access Point
Read Me First
This manual. It describes the safety precaution,
explosion protected type specications and the
license agreement of the attached software for the
YFGW520.
GS 01W02E02-01EN YFGW520
Field Wireless Access Point
Product specication including detailed model and
sufx code, optional specications and accessory of
the YFGW520.
nRegarding This User's Manual
lThis manual should be provided to the end user. Please recommend end users
to keep this manual at hand and refer to it as needed.
lThis manual and the identication tag attached on packing box are essential
parts of the product; keep them in a safe place for future reference.
lBefore use, read this manual thoroughly to comprehend its contents.
lThe purpose of the User’s Manual is to describe details of functions provided
in this product, not to warrant the product's suitability to the specic purposes
of customers.
lNo part of this manual may be reproduced in any form without Yokogawa's
written permission.
lThe contents of this manual may be changed without prior notice.
lAll reasonable effort has been made to ensure the accuracy of the contents of
this manual. However, if any errors or omissions are found, please inform any
of sales ofces listed on the back cover or your local distributor.
lThe specications covered by this manual are limited to those for the standard
type under the specied model number break-down and do not cover custom-
made instruments. When products whose sufx code or optional codes
contain code “Z” and an exclusive document is attached, please read it along
with this manual.
lPlease note that this User’s Manual may not be revised for any specication
changes, construction changes or operating part changes that are not
considered to affect function or performance.

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Safety Precautions
nSafety, Protection, and Modication of the Product
lIn order to protect the operator, product, and system controlled by the
product, observe the safety precautions described in this User’s Manual. If
users handle contrary to these instructions, we can not guarantee the safety.
lIf this instrument is used in a manner not specied in this User’s Manual, the
protection provided by this instrument may be impaired.
lModication of the product is strictly prohibited.
lIf customers attempt to repair or modify explosion protected type products
and fail to return them to their original state, the explosion protected structure
of this product will be lost, resulting in a hazardous state. All repairs and
modications of the product must be consulted with Yokogawa.
lIf any protection or safety circuit is required for the system controlled by the
product or for the product itself, prepares it separately.
lBe sure to use the spare parts approved by Yokogawa Electric Corporation
(hereafter simply referred to as Yokogawa) when replacing parts or
consumables.
lThe following symbols are used in the product and User’s Manual to indicate
that there are precautions for safety:
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 or physical damage. 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.

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NOTE
Draws attention to information essential for understanding the operation and features.
TIP Indicates additional information.
SEE
ALSO
Indicates a source to refer to
Indicates a protective grounding terminal. Before using the product, ground the terminal.
Indicates a functional grounding terminal. Before using the product, ground the terminal.
Indicates a DC supply
nSafe Use of This Product
This product is designed to be used by a person with specialized knowledge. For the safety
of the operator and to protect the instrument and the system, please be sure to follow this
manual’s safety instructions when handling this instrument. If these instructions are not heeded,
the protection provided by this instrument may be impaired. In this case, Yokogawa cannot
guarantee that the instrument can be safely operated. Please pay special attention to the
following points:
(a) Installation
• This instrument may only be installed by an engineer or technician who has an expert
knowledge of this device. Operators are not allowed to carry out installation unless they meet
this condition.
• All installation shall comply with local installation requirements and the local electrical code.
(b) Wiring
• The instrument must be installed by an engineer or technician who has an expert knowledge
of this instrument. Operators are not permitted to carry out wiring unless they meet this
condition.
(c) Operation
• Wait 1 min. after the power is turned off, before opening the covers.
(d) Maintenance
• Please carry out only the maintenance procedures described in this manual. If you require
further assistance, please contact the nearest Yokogawa ofce.
• Care should be taken to prevent the build up of dust or other materials on the display glass
and the name plate. To clean these surfaces, use a soft, dry cloth.
(e) Explosion Protected Type Instrument
• Users of explosion protected instruments should refer rst to “Explosion Protected Type
Specications” section of this manual.
• The use of this instrument is restricted to those who have received appropriate training in the
device.

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• Take care not to create sparks when accessing the instrument or peripheral devices in a
hazardous location.
• Repair or modication to this instrument by customer will cause malfunction of explosion
protect function and hazardous situation. If you need to repair or modication, please contact
the nearest Yokogawa ofce.
(f) Modication
• Yokogawa will not be liable for malfunctions or damage resulting from any modicationmade
to this instrument by the customer.
(g) Product Disposal
• The instrument should be disposed of in accordance with local and national legislation/
regulations.
nWarranty
lThe warranty terms of this instrument are described in the quotation. We will
make any repairs that may become necessary during the guaranteed term free
of charge.
lPlease contact our sales ofce or your local distributor if this instrument
requires repair.
lIf the instrument is faulty, contact us with complete details about the
problem and the length of time it has been faulty, and state the model and
serial number. We would appreciate the inclusion of drawings or additional
information.
lThe results of our examination will determine whether the product will be
repaired free of charge or on an at-cost basis.
nThe guarantee will not apply in the following cases:
lDamage due to negligence or insufcient maintenance on the part of the
customer.
lProblems or damage resulting from handling, operation or storage that
violates the intended use and specications.
lProblems that result from using or performing maintenance on the instrument
in a location that does not comply with the installation location specied by
Yokogawa.
lProblems or damage resulting from repairs or modications not performed by
Yokogawa or someone authorized by Yokogawa.
lProblems or damage resulting from inappropriate installation after delivery.

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l Problems or damage resulting from disasters such as res, earthquakes,
storms, oods, or lightning strikes and external causes.
n Warranty and Disclaimer
l Yokogawa assumes no responsibilities for this product except as stated in the
warranty.
l 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.
n Authorized Representative in the EEA
The Authorized Representative for this product in the EEA is: Yokogawa Europe B.V.
Euroweg 2, 3825 HD Amersfoort, THE NETHERLANDS.
n Notes on Hardware
lAppearance and Accessories
Check the following when you receive the product:
• Appearance
• Standard accessories
Contact our sales representative or your local distributor if the product’s coating has come off or
any accessories are missing.
l Model and Sufx Codes
The name plate on the product contains the model and sufx codes. Verify that the specication
indicated in the “MODEL AND SUFFIX CODES” and “OPTIONAL SPECIFICATIONS” in General
Specications “GS 01W02E02-01EN” is in compliance with the specications written on the order
sheet. If you have any questions, contact our sales ofce or your local distributor.
n Notes on Attached Software
l Before opening the media package, read YFGW520 Software License
Agreement. Once the package is opened, it is thought that the contract is
agreed.
l Yokogawa assumes no responsibilities for this software except as stated in
the warranty.
l This software is used with this product exclusively. This can be installed in the
computer which connects with this product.

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n Regulatory Compliance for Radio and Telecommunication
Please conrm that an installation region fullls a standards, require additional regulatory
information and approvals, contact to Yokogawa Electric Corporation.
l Radio Equipment Directive
Hereby, Yokogawa Electric Corporation declares that the radio equipment type YFGW520 is
in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is
available at the following internet address:
http://www.yokogawa.com/d/
l EMC Conformity Standards
EN 301 489-1, EN 301 489-17, EN 61326-1, EN 55011 Class A, Group 1, EN 61000-6-2
CAUTION
This equipment is a Class A product.
This equipment is not intended for use in residential environments and may not provide adequate
protection to radio reception in such environments.
Please use this equipment in the industrial environment only.
l Safety Conformity Standards
Applicable standard: EN 61010-1, EN 62479, EN 60825-1
(1) Pollution Degree 2
“Pollution degree” describes the degree to which a solid, liquid, or gas which deteriorates
dielectric strength or surface resistivity is adhering. “2” applies to normal indoor atmosphere.
Normally, only non-conductive pollution occurs. Occasionally, however, temporary conductivity
caused by condensation must be expected.
(2) Installation Category I
“Overvoltage category (Installation category)” describes a number which denes a transient
overvoltage condition. It implies the regulation for impulse withstand voltage. “I” applies to
electrical equipment which is supplied from the circuit when appropriate transient overvoltage
control means (interface) are provided.
(3) Laser Safety
100BASE-FX (Single mode Fiber) model of YFGW520 is compliant with IEC 825-1 Class 1 and
CDRH 21-CFR 1040 Class 1 eye safety requirements.
CAUTION
• To avoid eye injury although, please do not see a light source.
CAUTION
• When the maximum operating temperature is more than 60°C, use the wiring cable of 80°C
or higher temperature rating.

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l Spectrum Conformity Standard
EN 300 328
lFCC compliance
FCC ID: SGJ-WFC015
FCC Approval (Part 15C)
This device complies with part 15 of the FCC Rules. Operation is subject to the following two con-
ditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Co-located:
This transmitter must not be co-located or operated in conjunction with any other antenna or
transmitter.
FCC WARNING
Changes or modications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
NOTE
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio commu-
nications. Operation of this equipment in a residential area is likely to cause harmful interference
in which case the user will be required to correct the interference at his own expense.
RF Exposure Compliance:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environ-
ment and meets the FCC radio frequency (RF) Exposure Guidelines. This equipment should be
installed and operated keeping the radiator at least 20 cm or more away from person’s body.

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l ISED compliance
IC: 8999A-WIC014
This device complies with ISED’s applicable licence-exempt RSS standard(s). Operation is sub-
ject to the following two conditions: (1) this device may not cause interference, and (2) this device
must accept any interference, including interference that may cause undesired operation of the
device.
This radio transmitter 8999A-WIC014 has been approved by ISED to operate with the antenna
types listed below with the maximum permissible gain and required antenna impedance for each
antenna type indicated. Antenna types not included in this list, having a gain greater than the
maximum gain indicated for that type, are strictly prohibited for use with this device.
Antenna type Gain
Sleeve 2.14 dBi
Collinear 9 dBi
Hybrid patch 15 dBi
French:
Le présent appareil est conforme aux CNR d’ISDE applicables aux appareils radio exempts de
licence. L’exploitation est autorisée aux deux conditions suivantes : (1) l’appareil ne doit pas
produire de brouillage, et (2) l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.
Le présent émetteur radio 8999A-WIC014 a été approuvé par Industrie Canada pour fonctionner
avec les types d’antenne énumérés ci-dessous et ayant un gain admissible maximal.
Les types d’antenne non inclus dans cette liste, et dont le gain est supérieur au gain maximal
indiqué, sont strictement interdits pour l’exploitation de l’émetteur.
Type d’antenne Gain
Sleeve 2.14 dBi
Collinear 9 dBi
Hybrid patch 15 dBi
RF Exposure Compliance:
This equipment complies with IC radiation exposure limits set forth for an uncontrolled environ-
ment and meets RSS-102 of the IC radio frequency (RF) Exposure rules. This equipment should
be installed and operated keeping the radiator at least 20 cm or more away from person’s body.
French:
Cet équipement est conforme aux limites d’exposition aux rayonnements énoncées pour un envi-
ronnement non contrôlé et respecte les règles d’exposition aux fréquences radioélectriques (RF)
CNR-102 de l’IC. Cet équipement doit être installé et utilisé en gardant une distance de 20 cm ou
plus entre le radiateur et le corps humain.
lRRA compliance
This product complies with the Radio Waves Act (Republic of Korea).
Registration No: R-R-YHQ-WRA011, R-C-YHQ-WRA013
Equipment Name: Field Wireless Access Point
Model name: YFGW520
Trade Name: Yokogawa Electric Corp.
Manufacturer: Yokogawa Electric Corp.
Country of Origin: Japan

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nControl of Pollution Caused by the Product
lEU RoHS
This product is in conformity with the following standard:
EN 50581:2012 (Technical documentation for the assessment of electrical and electronic
products with respect to the restriction of hazardous substances)
lChina RoHS
This is an explanation for the product based on “Control of Pollution caused by Electronic
Information Products” in the People’s Republic of China.
電子情報製品汚染制御管理弁法（中国版 RoHS）
产品中有害物质或元素的名称及含量
型号 部件名称
有害物质
铅
（Pb） 汞 （Hg） 镉 （Cd） 六价铬 （Cr(VI)） 多溴联苯 （PBB） 多溴二苯醚 （PBDE）
YFGW520
现场无线接入点
壳体 × ○ ○ ○ ○ ○
基板组件 × ○ ○ ○ ○ ○
电源连接线 × ○ ○ ○ ○ ○
天线组件 × ○ ○ ○ ○ ○
○ ：表示该部件的所有均质材料中的有害物质的含量均在GB/T26572 标准中所规定的限量以下。
× ：表示至少该部件的某些均质材料中的有害物质的含量均在GB/T26572 标准中所规定的限量以上。
环保使用期限：
该标识适用于SJ /T11364 中所述，在中华人民共和国销售的电子电气产品的环保使用期限。
注）该年数为“环保使用期限”，并非产品的质量保证期。

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Explosion Protected Type Specications
n Optional Specications (For Explosion Protected Type)
Item Description Code
Factory
Mutual
(FM) *1*2*3
United
States
FM Nonincendive Approval (United States)
Certicate: FM17US0294X
Applicable standard: FM Class 3600:2018, FM Class 3611:2018, FM Class 3810:2018,
NEMA 250:2014
Nonincendive for Class I, Division 2, Groups A, B, C and D. Class I, Zone 2, Group IIC. Suitable for
Class II, Division 2, Groups F and G, and Class III, Division 1
Enclosure: Type 4X
Amb. Temp.(Tamb): –40 to 70°C (–40 to 158°F ), Altitude: Up to 3000 m
FN17
Canada FM Non-Incendive and Type n Approval (Canada)
Certicate: FM17CA0150X
Applicable standard: C22.2 No. 94-2:2015, C22.2 No. 213:2017, CAN/CSA-C22.2 No. 60079-0:2015,
CAN/CSA-C22.2 No. 60079-11:2014, CAN/CSA-C22.2 No. 60079-15:2016,
CAN/CSA-C22.2 No. 60529:2016, CAN/CSA-C22.2 No. 61010-1-12:R2017
Non-incendive for Class I, Division 2, Groups A, B, C, D
Suitable for Class II, Division 2, Groups F, G; Class III, Division 1
Ex nA [ic] IIC T4 Gc
Enclosure: Type 4X, IP66
Amb. Temp(Tamb): –30 to 70°C (–22 to 158°F ), Altitude: Up to 3000 m
CN17
ATEX *1*2ATEX Type n declaration
Applicable standard: EN 60079-0: 2012+A11:2013, EN 60079-11:2012, EN 60079-15:2010
II 3 G Ex nA [ic] IIC T4 Gc X
Enclosure: IP66 according to EN 60079-15
Amb. Temp.(Tamb): –30 to 70°C (–22 to 158°F)
Atmospheric pressure: 70 kPa to 110 kPa (Altitude: Up to 3000 m)
KN27
ATEX Flameproof Approval
Certicate: DEKRA 15ATEX0042 X
Applicable Standard: EN 60079-0:2012+A11:2013, EN 60079-1:2014, EN 60079-11:2012
II 2 G Ex db [ib] IIC T4 Gb
Um: 250 V
Amb. Temp.(Tamb): –40 to 70°C (–40 to 158°F)
KF27
IECEx *1*2
*3 IECEx Type n Approval
Certicate: IECEx DEK 14.0028X
Applicable standard: IEC 60079-0:2011, IEC 60079-11:2011, IEC 60079-15:2010
Ex nA [ic] IIC T4 Gc
Enclosure: IP66 according to IEC 60079-15
Amb. Temp.(Tamb): -30 to 70°C (-22 to 158°F)
SN27
IECEx Flameproof Approval
Certicate: IECEx DEK 15.0021X
Applicable Standard: IEC 60079-0:2011, IEC 60079-1:2014, IEC 60079-11:2011
Ex db [ib] IIC T4 Gb
Um: 250 V
Amb. Temp.(Tamb): –40 to 70°C (–40 to 158°F)
SF27
*1: G1/2 electrical connection (Electrical connection code: 0) cannot be selected.
*2: Applies only English manual language (Manual language code: 1).
*3: CE marking is omitted from the product when this option is selected

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n Installation of an Explosion Protected Instrument
If a customer makes a repair or modication to an explosion protected instrument and the
instrument is not restored to its original condition, its explosion protected construction may be
compromised and the instrument may be hazardous to operate. Please contact Yokogawa
before making any repair or modication to an instrument.
CAUTION
The installation of the devices should be carried out by the engineers or other professional per-
sonnel of the related expertise. The installation should not be carried out by operators or other
unprofessional personnel.
CAUTION
This instrument has been tested and certied as being explosion protected. 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
• A modication of the equipment would no longer comply with the construction described in
the certicate documentation.
• To preserve the safety of Flameproof equipment requires great care during mounting,
wiring, and piping. Safety requirements also place restrictions on maintenance and repair
activities. Please read the following sections very carefully.
NOTE
• The front and rear cover are locked by an Allen head bolt (a shrouding bolt) on Flameproof
type instruments. When the shrouding bolt is driven clockwise by an Allen wrench, it is going
in and cover lock is released, and then cover can be opened by hand.
• When a cover is closed, it is the must turn the shrouding bolt counterclockwise and lock the
cover. Tighten the shrouding bolt to a torque of 0.7 N·m.
Shrouding bolt
F02.ai

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NOTE
• YFGW520 should be installed in upright position.
• YFGW520 does not have a power switch inside. Prepare a dedicated breaker for the
external power line to turn ON/OFF the device.
• Make sure that the breakers are installed in the power supply circuits located in non-
hazardous areas so that the power can be shutoff when abnormality occurs.
• Electrostatic charge may cause an explosion hazard. Avoid any actions that cause the
generation of electrostatic charge, such as rubbing with a dry cloth on the non-metalic parts
(excluding glass parts) or coated parts of product.
• Take care not to generate mechanical sparking when access to the instrument and
peripheral devices in hazardous area.
• The antenna and surge protective device provided with YFGW520 are simple apparatus in
accordance with IEC 60079-11 or EN 60079-11.
• They are passive components and their internal inductance and capacitance are
negligible regarding intrinsically safe installation.
• They do not contain any voltage and/or current-limiting devices.
•
They do not contain any means of increasing voltage or current, such as DC-DC converters.
• Surge protective device is not separated from the earth and must earthed together with
YFGW520 in accordance with IEC 60079-14 or EN 60079-14.
• Surge protective device has metallic enclosures and no risk for electrostatic discharges.
• As for the temperature class, they are classied as T4 for Ta ≤ 70°C, since the power
applied to them is ≤ 130 mW and their surface area is > 20 mm2.
• Lc of the provided cable is 0.21 μH/m.
• Cc of the provided cable is 83 pF/m.

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n FM Approval (United States)
Caution for FM Nonincendive Approval (United States).
(1) Technical Data
Note 1. Model YFGW520 Field Wireless Access Point with optional code FN17 is applica-
ble for use in hazardous (classied) locations.
• Applicable standards: FM Class 3600:2018, FM Class 3611:2018, FM Class 3810:2018,
NEMA 250:2014
• Nonincendive for Class I, Division 2, Groups A, B, C and D; Class I, Zone 2, Group IIC
Suitable for Class II, Division 2, Groups F and G, and Class III, Division 1
• Locations: Indoor and Outdoor use
• Enclosure: Type 4X
• Temperature Class: T4
• Ambient Temperature: –40 to 70°C (-40 to 158°F)
• Altitude: Up to 3000 m
• Power Supply: Rated Voltage: 24 V DC
Voltage Range*1: 10.0-26.4 V DC
*1: The equipment shall not be operated outside the range.
• Power dissipation: ≤ 3.5 W
• RF Power: ≤ 60 mW
(2) Electrical Parameters
Refer to Control Drawing (NFM027-A15).
(3) Operation
Refer to Control Drawing (NFM027-A15).
(4) Maintenance and Repair
WARNING
• Only personnel authorized by Yokogawa Electric Corporation can repair the equipment.

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(5) Control Drawing
F03.ai

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F04.ai
NOTE
The equipment must be installed in accordance with the user’s manual.

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n FM Approval (Canada)
Caution for FM Nonincendive Approval (Canada).
(1) Technical Data
Note 1. Model YFGW510 Field Wireless Access Point with optional code CN17 is applica-
ble for use in hazardous area.
• Certicate: FM17CA0150X
• Applicable standards:
C22.2 No. 94-2:2015, C22.2 No. 213:2017, CAN/CSA-C22.2 No. 60079-0:2015,
CAN/CSA-C22.2 No. 60079-11:2014, CAN/CSA-C22.2 No. 60079-15:2016,
CAN/CSA-C22.2 No. 60529:2016, CAN/CSA-C22.2 No. 61010-1-12
• Hazardous Location Ratings:
Nonincendive for Class I, Division 2, Groups A, B, C, D;
Suitable for Class II, Division 2, Groups F,G; Class III, Division 1
Ex nA [ic] IIC T4 Gc
• Temperature Class: T4
• Ambient Temperature: –30 to 70°C (-22 to 158°F)
• Altitude: ≤ 3000 m
• Enclosure: Type 4X, IP66
• Power Supply: Rated Voltage: 24 V DC
Voltage Range*1: 10.0-26.4 V DC
*1: The equipment shall not be operated outside the range.
• Power dissipation: ≤ 3.5 W
• RF Power: ≤ 60 mW
(2) Electrical Connection
The type of electrical connection depends on the marking below on YFGW520.
Marking The type of electrical connection Note
MM20 (ISO) M20 X 1.5
A or N ANSI 1/2 NPT 1/2-14 NPT
• This marking is incused at the back side of the electrical connection block.
Marking
F05.ai

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(3) Operation
The equipment shall be installed so that pollution degree 2 in accordance with IEC 60664-1 is
maintained inside the enclosure.
WARNING
• Electrostatic charges on the non-metallic parts (excluding glass parts) or coated parts of the
Field Wireless Access Point shall be avoided.
• Take care not to generate mechanical sparking when accessing to the equipment and pe-
ripheral device in hazardous locations.
(4) Maintenance and Repair
The maintenance of the equipment must be in accordance with the user’s manual.
When opening the cover, the enclosure should be dry and clean to prevent the ingress of
water and dust.
WARNING
• Only personnel authorized by Yokogawa Electric Corporation can repair the equipment.

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(5) Control Drawing
F06.ai

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F07.ai
NOTE
The equipment must be installed in accordance with the user’s manual.