User guide

<1. Introduction>
1-1
IM 01C25R05-01EN
1. Introduction
Thank you for purchasing the DPharp EJX
multivariable transmitter.
EJX multivariable transmitters are precisely
calibrated at the factory before shipment.
To ensure both safety and efciency, please
read this manual carefully before operating the
instrument.
This manual describes the Modbus protocol
communication functions of the EJX multivariable
transmitter and explains how to set the parameters
for EJX multivariable transmitters.
For information on the installation, wiring, and
maintenance of EJX multivariable transmitters,
please refer to the user’s manual.
EJX910A / EJX930A IM 01C25R01-01E
 Regarding This Manual
• This manual should be provided 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
tness 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
ofce.
• The 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.
• Please note that changes in the specications,
construction, or component parts of the
instrument may not immediately be reected
in this manual at the time of change, provided
that postponement of revisions will not cause
difculty to the user from a functional or
performance standpoint.
• The following safety symbols 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 Safe Use of This Product
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.