2IM 04L57B01-02EN
Precautions Related to the Protection,
Safety, and Alteration of the Product
• Improper handling or use can lead to injury to the user or
damage to the instrument. This symbol appears on the
instrument to indicate that the user must refer to the user’s
manual for special instructions. The same symbol appears
in the corresponding place in the user’s manual to identify
those instructions. In the manual, the symbol is used in
conjunction with the word “WARNING” or “CAUTION.”
“Handle with care.” To avoid injury and damage to the instrument,
the operator must refer to the explanation in the manual.
Functional ground terminal (do not use this terminal
as a protective ground terminal.)
Direct current
• For the protection and safe use of the product and the
system in which this product is incorporated, be sure to
follow the instructions and precautions on safety that are
stated in this manual whenever you handle the product.
Take special note that if you handle the product in a
manner that violates these instructions, the protection
functionality of the product may be damaged or impaired.
In such cases, Yokogawa does not guarantee the quality,
performance, function, and safety of product.
• When installing protection and/or safety circuits such as
lightning protection devices and equipment for the product
and control system or designing or installing separate
protection and/or safety circuits for fool-proof design and
fail-safe design of the processes and lines that use the
product and the control system, the user should implement
these using additional devices and equipment.
• If you are replacing parts or consumable items of the
product, make sure to use parts specified by Yokogawa.
• This product is not designed or manufactured to be used
in critical applications that directly affect or threaten human
lives. Such applications include nuclear power equipment,
devices using radioactivity, railway facilities, aviation
equipment, air navigation facilities, aviation facilities, and
medical equipment. If so used, it is the user’s responsibility
to include in the system additional equipment and devices
that ensure personnel safety.
• Do not modify this product.
Notes on 920 MHz Wireless
Communication
• 920 MHz wireless communication can be used only in the US
(Area suffix code: A) or Republic of Korea (Area suffix code: K).
• Only US FCC standards and UL standards are supported.
(Area suffix code: A)
• Only Korea KC mark standards are supported.(Area suffix code: K)
• This product has obtained FCC certification or KC mark
conformity. As such, the following acts may be punishable
by law.
• Disassembling or altering the product
• Removing the certification label
• Using an antenna other than the specified option
• Communication may not be possible in the following
locations due to radio signal reflection.
• Where strong magnetic field, static electricity, or radio
interference occurs
• Rooms with metallic walls (including concrete containing
metal reinforcement material), inside cabinets, etc.
• If another wireless device using the same radio frequency
band as this product is present in the communication area
of this product, data rate degradation or communication
errors may occur, preventing normal communication.
• Because this product uses radio signals, bear in mind that
communication may be intercepted by third parties.
• This equipment complies with FCC radiation exposure limits set
forth for an uncontrolled environment and meets the FCC radio
frequency (RF) Exposure Guidelines.
This equipment has very low levels of RF energy that is deemed
to comply without testing of specific absorption rate(SAR).
• Communication errors can occur when wireless
communication is temporarily interrupted due to
environmental factors such as radio interference.
• When several GX70SMs perform wireless communication
with a single coordinator, there is a slight possibility that
data loss may occur due to collision of data transmitted
simultaneously from the GX70SMs to the coordinator.
In addition, communication errors may occur due to
operating environment conditions such as electromagnetic
interference from other devices.
● DoNotOperateinanExplosiveAtmosphere
Donotoperatetheinstrumentinthepresenceofam-
mablegas,vapors,orcombustibledust.Operation
in such an environment constitutes a safety hazard.
Prolonged use in a highly dense corrosive gas (H2S,
SOx,etc.)willcauseamalfunction.
● DoNotRemoveCovers
ThecovershouldberemovedbyYokogawa’squalied
personnel only.
● DamagetotheProtection
Operatingtheinstrumentinamannernotdescribedin
this manual may damage the instrument’s protection.
● InstallationandWiring
• To prevent electric shock, do not apply voltages that
exceedtheratingstotheinputterminals.
• Make sure to use appropriate wires, and torque. To
prevent electric shock due to damage, prevent strong
tension from being applied to the cords.
● Using920MHzwirelesscommunication
•Donotinstalloruseinsideaircraftsorhospitalsorin
areas where the use of wireless devices is prohibited.
•Donotinstallorusenearautomaticdoors,re
alarms, and other automatically controlled equip-
ment.
Theradiosignalsfromthisproductmayaectthe
equipment and may cause a malfunction.
•Donotinstallorusenearcardiacpacemakersor
electronic devices that involve highly accurate con-
trol or minute signals.
Doingsomaycausethemtomalfunction.
•Donotusetheproductinmedicalequipmentorother
applications that require high level of safety or in
systems (e.g., trunk line communication equipment,
computersystems)thatrequireextremelyhighreli-
ability.
Malfunction or failure may cause life-threatening ac-
cidents or great social disruption.
This instrument is a Class A product.
Operation of this instrument in a residential area may cause
radio interference, in which case the user is required to take
appropriate measures to correct the interference.
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