Safety Precautions
• This instrument conforms to IEC safety class I
(provided with terminal for protective grounding),
Installation Category II, and EN61326-1 (EMC
standard), Measurement Category II (CAT II).*
* Measurement Category II (CAT II) are for the analog
input modules (GX90XA) and PID control mopdule
(GX90UT).
Measurement category II (CAT II) applies to
measuring circuits connected to low voltage
installation, and electrical instruments supplied
with power from fixed equipment such as electric
switchboards.
• This instrument is an EN61326-1 (EMC standard)
class A instrument (for use in commercial, industrial, or
business environments). The influence rate (judgment
condition A) in the immunity test environment is within ±
10 % of the range.
• The general safety precautions described here must
be observed during all phases of operation. If the
SMARTDAC+ is used in a manner not described in
this manual, the SMARTDAC+ safety features may be
impaired. Yokogawa Electric Corporation assumes no
liability for the customer’s failure to comply with these
requirements.
• The SMARTDAC+ is designed for indoor use.
■ About This Manual
• Please pass this manual to the end user. We also ask
you to store this manual in a safe place.
• This guide is intended for the following personnel:
Engineers responsible for installation, wiring, and
maintenance of the equipment.
Personnel responsible for normal daily operation of the
equipment.
• Read this manual thoroughly and have a clear
understanding of the product before operation.
• This manual explains the functions of the product. It
does not guarantee that the product will suit a particular
purpose of the user.
■ Precautions Related to the Protection, Safety,
and Alteration of the Product
The following safety symbols are used on the product
and in this manual.
the operator must refer to the explanation in the manual.
Protective ground terminal
Functional ground terminal
(do not use this terminal as a protective ground terminal.)
Alternating current
Direct current
ON (power)
OFF (power)
• 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.
● Use the Correct Power Supply
Ensure that the source voltage match-
es the voltage of the power supply be-
fore turning ON the power. In the case
of portable type and the GX60 (power
inlet type), ensure that it is within the
maximum rated voltage range of the
provided power cord before connect-
ing the power cord.
● Use the Correct Power Cord and Plug
(Portable Type, GX60 (power inlet
type))
To prevent electric shock or re, be
sure to use the power cord supplied
by Yokogawa. The main power plug
must be plugged into an outlet with a
protective earth terminal. Do not dis-
able this protection by using an ex-
tension cord without protective earth
grounding.
The power cord is designed for use
with this instrument. Do not use the
power cord with other instruments.
● Connect the Protective Grounding
Terminal
Make sure to connect the protective
grounding to prevent electric shock
before turning ON the power.
The power cord that comes with the
portable type and the GX60 (power
inlet type) are three prong type power
cord. Connect the power cord to a
properly grounded three-prong outlet.
● Do Not Impair the Protective Ground-
ing
Never cut off the internal or external
protective grounding wire or dis-
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