Advantech EKI-1200 Series User manual

User Manual
EKI-1200 Series
1/2/4-port Modbus Gateways

EKI-1200 Series User Manual ii
Copyright
The documentation and the software included with this product are copyrighted 2022
by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd. reserves the right
to make improvements in the products described in this manual at any time without
notice. No part of this manual may be reproduced, copied, translated or transmitted
in any form or by any means without the prior written permission of Advantech Co.,
Ltd. Information provided in this manual is intended to be accurate and reliable. How-
ever, Advantech Co., Ltd. assumes no responsibility for its use, nor for any infringe-
ments of the rights of third parties, which may result from its use.
Acknowledgments
Intel and Pentium are trademarks of Intel Corporation.
Microsoft Windows and MS-DOS are registered trademarks of Microsoft Corp.
All other product names or trademarks are properties of their respective owners.
Product Warranty (5 years)
Advantech warrants to you, the original purchaser, that each of its products will be
free from defects in materials and workmanship for five years from the date of pur-
chase.
This warranty does not apply to any products which have been repaired or altered by
persons other than repair personnel authorized by Advantech, or which have been
subject to misuse, abuse, accident or improper installation. Advantech assumes no
liability under the terms of this warranty as a consequence of such events.
Because of Advantech’s high quality-control standards and rigorous testing, most of
our customers never need to use our repair service. If an Advantech product is defec-
tive, it will be repaired or replaced at no charge during the warranty period. For out of-
warranty repairs, you will be billed according to the cost of replacement materials,
service time and freight. Please consult your dealer for more details.
If you think you have a defective product, follow these steps:
1. Collect all the information about the problem encountered. (For example, CPU
speed, Advantech products used, other hardware and software used, etc.) Note
anything abnormal and list any on screen messages you get when the problem
occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information readily available.
3. If your product is diagnosed as defective, obtain an RMA (return merchandize
authorization) number from your dealer. This allows us to process your return
more quickly.
4. Carefully pack the defective product, a fully-completed Repair and Replacement
Order Card and a photocopy proof of purchase date (such as your sales receipt)
in a shippable container. A product returned without proof of the purchase date
is not eligible for warranty service.
5. Write the RMA number visibly on the outside of the package and ship it prepaid
to your dealer.
Edition 1
Printed in Taiwan July 2022

iii EKI-1200 Series User Manual
Declaration of Conformity
CE
This product has passed the CE test for environmental specifications. Test conditions
for passing included the equipment being operated within an industrial enclosure. In
order to protect the product from being damaged by ESD (Electrostatic Discharge)
and EMI leakage, we strongly recommend the use of CE-compliant industrial enclo-
sure products.
FCC Class A
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 communications. Opera-
tion 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.
Technical Support and Assistance
1. Visit the Advantech web site at www.advantech.com/support where you can find
the latest information about the product.
2. Contact your distributor, sales representative, or Advantech's customer service
center for technical support if you need additional assistance. Please have the
following information ready before you call:
–Product name and serial number
–Description of your peripheral attachments
–Description of your software (operating system, version, application software,
etc.)
–A complete description of the problem
–The exact wording of any error messages

EKI-1200 Series User Manual iv
Warnings, Cautions and Notes
Document Feedback
To assist us in making improvements to this manual, we would welcome comments
and constructive criticism. Please send all such - in writing to: support@advan-
tech.com
Packing List
Before setting up the system, check that the items listed below are included and in
good condition. If any item does not accord with the table, please contact your dealer
immediately.
1 x Industrial Modbus Device
1 x DIN-Rail Mounting Bracket and Screws
1 x Wall-mounting Bracket
Warning! Warnings indicate conditions, which if not observed, can cause personal
injury!
Caution! Cautions are included to help you avoid damaging hardware or losing
data. e.g.
There is a danger of a new battery exploding if it is incorrectly installed.
Do not attempt to recharge, force open, or heat the battery. Replace the
battery only with the same or equivalent type recommended by the man-
ufacturer. Discard used batteries according to the manufacturer's
instructions.
Note! Notes provide optional additional information.

v EKI-1200 Series User Manual
Safety Instructions
Read these safety instructions carefully.
Keep this User Manual for later reference.
Disconnect this equipment from any DC outlet before cleaning. Use a damp
cloth. Do not use liquid or spray detergents for cleaning.
For plug-in equipment, the power outlet socket must be located near the equip-
ment and must be easily accessible.
Keep this equipment away from humidity.
Put this equipment on a reliable surface during installation. Dropping it or letting
it fall may cause damage.
The openings on the enclosure are for air convection. Protect the equipment
from overheating. DO NOT COVER THE OPENINGS.
Make sure the voltage of the power source is correct before connecting the
equipment to the power outlet.
Position the power cord so that people cannot step on it. Do not place anything
over the power cord.
All cautions and warnings on the equipment should be noted.
If the equipment is not used for a long time, disconnect it from the power source
to avoid damage by transient overvoltage.
Never pour any liquid into an opening. This may cause fire or electrical shock.
Never open the equipment. For safety reasons, the equipment should be
opened only by qualified service personnel.
If one of the following situations arises, get the equipment checked by service
personnel:
–The power cord or plug is damaged.
–Liquid has penetrated into the equipment.
–The equipment has been exposed to moisture.
–The equipment does not work well, or you cannot get it to work according to
the user's manual.
–The equipment has been dropped and damaged.
–The equipment has obvious signs of breakage.
DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT WHERE THE
STORAGE TEMPERATURE MAY GO -40°C (-40°F) ~ 85°C (185°F). THIS
COULD DAMAGE THE EQUIPMENT. THE EQUIPMENT SHOULD BE IN A
CONTROLLED ENVIRONMENT.
The sound pressure level at the operator's position according to IEC 704-1:1982
is no more than 70 dB (A).
DISCLAIMER: This set of instructions is given according to IEC 704-1. Advan-
tech disclaims all responsibility for the accuracy of any statements contained
herein.

EKI-1200 Series User Manual vi
Safety Precaution - Static Electricity
Static electricity can cause bodily harm or damage electronic devices. To avoid dam-
age, keep static-sensitive devices in the static-protective packaging until the installa-
tion period. The following guidelines are also recommended:
Wear a grounded wrist or ankle strap and use gloves to prevent direct contact to
the device before servicing the device. Avoid nylon gloves or work clothes,
which tend to build up a charge.
Always disconnect the power from the device before servicing it.
Before plugging a cable into any port, discharge the voltage stored on the cable
by touching the electrical contacts to the ground surface.

vii EKI-1200 Series User Manual
Contents
Chapter 1 Introduction..........................................1
1.1 Overview ................................................................................................... 2
1.2 Device Features........................................................................................ 2
Chapter 2 Getting Started.....................................3
2.1 Understanding Modbus Gateways............................................................ 4
2.1.1 Protocol Overview......................................................................... 4
2.1.2 Modbus RTU................................................................................. 5
2.1.3 Modbus ASCII............................................................................... 5
2.1.4 Modbus ASCII............................................................................... 6
2.2 Specifications............................................................................................ 6
2.3 Hardware................................................................................................... 8
2.3.1 Front View..................................................................................... 8
2.3.2 Rear View ................................................................................... 14
2.3.3 Left View ..................................................................................... 17
2.3.4 Top View ..................................................................................... 17
2.3.5 Bottom View................................................................................ 18
2.3.6 LED Indicators ............................................................................ 19
2.3.7 Dimensions ................................................................................. 20
2.4 Connecting Hardware ............................................................................. 23
2.4.1 DIN Rail Mounting....................................................................... 23
2.4.2 Wall-Mounting ............................................................................. 27
2.4.3 Serial Connection........................................................................ 31
2.4.4 Power Connections..................................................................... 31
Chapter 3 Configuration .....................................34
3.1 Configuration Utility Overview ................................................................. 35
3.2 Installing the Configuration Utility............................................................ 35
3.3 Menu Bar................................................................................................. 38
3.4 Quick Tool Bar ........................................................................................ 39
3.4.1 Utility Settings ............................................................................. 40
3.4.2 Discovering Your Device Server ................................................. 41
3.4.3 Network Settings......................................................................... 44
3.5 Administrator Settings ............................................................................. 47
3.5.1 Locate the Serial Device Server ................................................. 47
3.5.2 Securing the Serial Device Server .............................................. 48
3.5.3 Restore to Factory Default Settings ............................................ 50
3.5.4 Resetting the Device................................................................... 51
3.5.5 Add to Favorite............................................................................ 52
3.5.6 Update Firmware ........................................................................ 53
Chapter 4 Web Interface .....................................54
4.1 Overview ................................................................................................. 55
4.2 Accessing the Web Page ........................................................................ 55
4.2.1 Accessing the Web Page via Configuration Utility ...................... 55
4.2.2 Accessing the Web Page via Web Browser................................ 55
4.3 System .................................................................................................... 56
4.4 Ethernet Configuration ............................................................................ 57
4.5 Port Configuration ................................................................................... 58

EKI-1200 Series User Manual viii
4.5.1 Basic ........................................................................................... 58
4.5.2 Operation .................................................................................... 58
4.6 Monitor .................................................................................................... 62
4.6.1 Setting......................................................................................... 62
4.6.2 Statistic ....................................................................................... 63
4.6.3 Connected IP .............................................................................. 64
4.7 Syslogd ................................................................................................... 65
4.7.1 Syslogd Setting........................................................................... 65
4.7.2 Syslogd Message ....................................................................... 65
4.7.3 Modbus IP Mapping.................................................................... 66
4.7.4 Modbus Port Mapping................................................................. 66
4.7.5 Modbus Slave Response Time................................................... 66
4.8 Tools ....................................................................................................... 67
4.8.1 Ping............................................................................................. 67
4.8.2 Reboot ........................................................................................ 68
4.9 Management ........................................................................................... 68
4.9.1 Change Password ...................................................................... 68
4.9.2 Export Device Settings ............................................................... 69
4.9.3 Import Device Settings................................................................ 69

ix EKI-1200 Series User Manual
List of Figures
Figure 2.1 Modbus System Architecture 1...................................................................................... 5
Figure 2.2 Modbus System Architecture 2...................................................................................... 5
Figure 2.3 EKI-1211 Front View ..................................................................................................... 8
Figure 2.4 EKI-1221 Front View ..................................................................................................... 9
Figure 2.5 EKI-1221I-MT Front View ............................................................................................ 10
Figure 2.6 EKI-1222 Front View ................................................................................................... 11
Figure 2.7 EKI-1222I-SC Front View ............................................................................................ 12
Figure 2.8 EKI-1224 Front View ................................................................................................... 13
Figure 2.9 EKI-1211 Rear View .................................................................................................... 14
Figure 2.10 EKI-1221 and EKI-1222 Rear View ............................................................................. 15
Figure 2.11 EKI-1224 Rear View .................................................................................................... 16
Figure 2.12 EKI-1211 Left View...................................................................................................... 17
Figure 2.13 EKI-1211 Top View...................................................................................................... 17
Figure 2.14 EKI-122x Top View...................................................................................................... 18
Figure 2.15 EKI-1221I and EKI-1222I Top View............................................................................. 18
Figure 2.16 EKI-1211 Bottom View ................................................................................................ 18
Figure 2.17 EKI-1221I and EKI-1222I Bottom View ....................................................................... 19
Figure 2.18 EKI-1211 System LED Panel ...................................................................................... 19
Figure 2.19 EKI-122x System LED Panel....................................................................................... 19
Figure 2.20 EKI-1211 Dimensions.................................................................................................. 20
Figure 2.21 EKI-1221 Dimensions.................................................................................................. 20
Figure 2.22 EKI-1221I-MT Dimensions .......................................................................................... 21
Figure 2.23 EKI-1222I-SC Dimensions........................................................................................... 21
Figure 2.24 EKI-1222 Dimensions.................................................................................................. 21
Figure 2.25 EKI-1224 Dimensions.................................................................................................. 22
Figure 2.26 Installing the DIN Bracket (EKI-1211 Series) .............................................................. 23
Figure 2.27 Installing the DIN-Rail Mounting Kit (EKI-1211 Series) ............................................... 24
Figure 2.28 Correctly Installed DIN Rail Kit .................................................................................... 24
Figure 2.29 Installing the DIN-Rail Mounting Kit (EKI-122x Series) ............................................... 25
Figure 2.30 Correctly Installed DIN Rail Kit (EKI-122x Series)....................................................... 25
Figure 2.31 Removing the DIN-Rail (EKI-1211 Series) .................................................................. 26
Figure 2.32 Removing the DIN-Rail (EKI-122x Series) .................................................................. 26
Figure 2.33 Installing Wall Mount Plates (EKI-1211 Series)........................................................... 27
Figure 2.34 Securing Wall Mounting Screws.................................................................................. 28
Figure 2.35 Wall Mount Installation (EKI-1211 Series)................................................................... 28
Figure 2.36 Installing Wall Mount Plates (EKI-122x Series) ........................................................... 29
Figure 2.37 Securing Wall Mounting Screws.................................................................................. 30
Figure 2.38 Wall Mount Installation (EKI-1211 Series)................................................................... 30
Figure 2.39 Wall Mount Installation (EKI-122x Series) ................................................................... 31
Figure 2.40 DB9 Pin Assignment.................................................................................................... 31
Figure 2.41 Power Adapter Electrode Label Indication .................................................................. 32
Figure 2.42 Power Wiring for EKI-1211 .......................................................................................... 33
Figure 2.43 Power Wiring for EKI-1200-CE Series......................................................................... 33
Figure 3.1 InstallShield Wizard 1 of 4 ........................................................................................... 36
Figure 3.2 InstallShield Wizard 2 of 4 ........................................................................................... 36
Figure 3.3 InstallShield Wizard 3 of 4 ........................................................................................... 37
Figure 3.4 InstallShield Wizard 4 of 4 ........................................................................................... 37
Figure 3.5 Configuration Utility Overview ..................................................................................... 38
Figure 3.7 View > Settings > Main Form Setting .......................................................................... 40
Figure 3.8 View > Settings > Device Manager ............................................................................. 41
Figure 3.9 Open View of Serial Device Configuration Utility......................................................... 42
Figure 3.10 Selecting a Group........................................................................................................ 42
Figure 3.11 Selecting a Device....................................................................................................... 43
Figure 3.12 Viewing Basic Settings ................................................................................................ 43
Figure 3.13 Utility Overview............................................................................................................ 44
Figure 3.14 Network Settings Overview ......................................................................................... 45

EKI-1200 Series User Manual x
Figure 3.15 Reset Device ............................................................................................................... 46
Figure 3.16 Locate the Serial Device Server.................................................................................. 47
Figure 3.17 Lock the Serial Device Server ..................................................................................... 48
Figure 3.18 Enter a Password ........................................................................................................ 48
Figure 3.19 Reset Device ............................................................................................................... 49
Figure 3.20 Unlock the Serial Device Server.................................................................................. 49
Figure 3.21 Restore to Factory Default Settings ............................................................................ 50
Figure 3.22 Reset Device ............................................................................................................... 51
Figure 3.23 Add to Favorite ............................................................................................................ 52
Figure 3.24 Update Firmware......................................................................................................... 53
Figure 4.1 Accessing the Web Page via Configuration Utility ...................................................... 55
Figure 4.2 System ........................................................................................................................ 56
Figure 4.3 Ethernet Configuration ................................................................................................ 57
Figure 4.4 Port Configuration > Basic........................................................................................... 58
Figure 4.5 Master Mode ............................................................................................................... 59
Figure 4.6 Slave Mode ................................................................................................................. 59
Figure 4.7 Port Configuration > Operation > Modbus Slave Mode............................................... 60
Figure 4.8 Port Configuration > Operation > Modbus Master Mode............................................. 61
Figure 4.9 Monitor > Setting ......................................................................................................... 62
Figure 4.12 Syslogd > Syslogd Setting .......................................................................................... 65
Figure 4.13 Syslogd > Syslogd Message ....................................................................................... 65
Figure 4.14 Syslogd > Modbus IP Mapping.................................................................................... 66
Figure 4.15 Syslogd > Modbus Port Mapping ................................................................................ 66
Figure 4.16 Syslogd > Modbus Slave Response Time................................................................... 66
Figure 4.17 Tools > Ping ................................................................................................................ 67
Figure 4.18 Tools > Reboot............................................................................................................ 68
Figure 4.19 Management > Change Password.............................................................................. 68
Figure 4.20 Management > Import ................................................................................................. 69

Chapter 1
1Introduction

EKI-1200 Series User Manual 2
1.1 Overview
Advantech’s EKI-1200 Series of Modbus Gateways (the following manual will use
EKI-1200 Series instead of complete model name) are a robust, feature-rich, and
cost effective way to integrate Ethernet and Serial Modbus devices. The EKI-1200
Series provides serial ports (one, two or four), Ethernet ports (one or two), a wide
range of power inputs, and a compact slim design, making them an ideal solution for
connecting multiple Modbus/ RTU and Modbus/ASCII serial devices to Modbus TCP
(Ethernet).
Originally developed for PLCs in industrial automation and manufacturing control
applications, Modbus is one of the most popular open standard protocols in use
today. The communication mode can be Modbus RTU/ASCII (Serial) or Modbus TCP
(Ethernet). Many industrial devices use Modbus as their communication standard.
However, the Ethernet-based Modbus protocol is different from the original serial-
based protocols that a Modbus Gateway is needed to be a bridge for integration.
The two Ethernet ports allow the EKI-122x-CE to establish two separated Ethernet
connections to two Ethernet domains or two Ethernet switches in the same domain.
Through a dual Ethernet connection, the EKI-122x-CE greatly improves the device
connectivity reliability, increase system stability, and simplify the redundant configura-
tion.
The Modbus/RTU and Modbus/ASCII protocols define how a “master” device polls
one or more “slave” devices and write real-time data over RS-232, RS-422, or RS-
485 serial data communication. The EKI-1200 Series provides a feature that can
allow users to select master or slave operation for each serial port. The EKI-1200
Series not only allows Ethernet master can control serial slaves, but also allow serial
masters to control Ethernet or serial slaves. Furthermore, the EKI-1200 Series can
allow both Ethernet and serial slaves to be controlled by both Ethernet and serial
masters.
The EKI-1200 Series supports various operating modes: RTU Master, RTU Slave,
ASCII Master, and ASCII Slave.
1.2 Device Features
Provides 2 x 10/100 Mbps Ethernet ports for LAN redundancy
Integration of Modbus TCP and Modbus RTU/ASCII networks
Supports up to 921.6 kbps and any baud rate setting
Supports up to 16 connections and 32 simultaneously requests
Auto searching slave ID over configuration utility
Software selectable RS-232/422/485 communication
Mounts on DIN-rail and Wall mount
Built-in 15 KV ESD protection for all serial signals
Automatic RS-485 data flow control
Supports surge protection for DC power ports with line to line 2 KV, and line to
earth 4 KV; for signal ports with 4 KV.
'I' models support a wide operating temperature
'CI' models support isolation and wide operating temperature
EKI-1211: supports one Ethernet port and up to 230.4 Kbps baud rate

Chapter 2
2Getting Started

EKI-1200 Series User Manual 4
2.1 Understanding Modbus Gateways
Networks have become increasingly vital for industrial automation applications. Many
control devices today do not have a network port and can only communicate with a
dedicated local PC or control panel. Advantech’s revolutionary network-enabling
technology is now allowing control devices with serial ports to connect to the Ethernet
and share networks quickly and cost-effectively. The EKI-1200 Series are network-
based, Modbus gateways for integrating new and existing Mo bus/RTU and Modbus/
ASCII serial devices to newer TCP/IP networked-based devices. Manufacturers,
system integrators, and end users can now take advantage of Modbus gateways to
create networked applications for remote managing and accessing data for their
control devices that wasn’t possible before.
2.1.1 Protocol Overview
Originally developed for PLCs in industrial automation and manufacturing control
application, Modbus has become one of the most popular open standard protocols in
use today. When it comes to planning data communication for open, multi-vendor
industrial control systems, Modbus is the first choice of end-users and integrators.
Although it’s not the most powerful protocol available, its rare simplicity allows not
only rapid implementation, but also remains flexible enough to be applied in virtually
all industrial situations. The communication mode of Modbus can be ASCII, RTU, or
TCP/IP. Modbus gateways are used to support applications such as protocol conver-
sion between serial (Modbus/ASCII or Modbus/RTU) and networked (Modbus/TCP)
Modbus devices or it can be used to bridge Modbus serial devices over TCP/IP net-
work.
The Modbus/RTU and Modbus/ASCII protocols define how a “master” device polls
one or more “slave” devices to read and write real-time data over RS-232, RS-422, or
RS-485 serial data communication. The simplicity of Modbus/RTU not only allows
rapid implementation, but can also remain flexible enough to be applied in virtually all
industrial situations.
During Modbus network communication, the protocol determines how each controller
will know its device address, recognize a message addressed to it, determine the
kind of action to be taken, and extract any data or other information contained in the
message. If a reply is required, the controller will construct the reply message and
send it back using Modbus protocol.
The way controllers communicate with each other is by using a master-slave tech-
nique, in which only one device (the master) can initiate queries. The other devices
(the slaves) respond by supplying the requested data to the master, or by taking the
action requested in the query. Typical master devices include host processors and
programming panels. Typical slaves include programmable controllers.
It is the master that can address individual slaves and initiate a broadcast message
to all slaves. On the other hand, slaves return a response to queries that are
addressed to them individually. Responses are not returned to broadcast queries
from the master.
The Modbus protocol has a definite format for the master’s query, which incorporates
the device (or broadcast) address, a function code defining the requested action, any
data to be sent, and an error-checking field. The slave’s response message, which is
also constructed using Modbus protocol, contains fields confirming the action taken,
any data to be returned, and an error-checking field. If an error occurred in receipt of
the message, or if the slave is unable to perform the requested action, the slave will
construct an error message and send it as its response.

5 EKI-1200 Series User Manual
The basic system architecture is as below:
Figure 2.1 Modbus System Architecture 1
Figure 2.2 Modbus System Architecture 2
2.1.2 Modbus RTU
The Modbus/RTU protocol defines how a “master” device polls one or more “slave”
devices to read and write data in real-time over RS-232, RS-422, or RS-485 serial
data communication.
When using RTU mode, each 8-bit byte in a message contains two 4-bit hexadecimal
characters. The main advantage of this mode is that its greater character density
allows better data throughput than ASCII mode for the same baud rate.
Nevertheless, each message must be transmitted in continuous stream.
2.1.3 Modbus ASCII
When using ASCII mode, each 8-bit byte in a message is sent as two ACSII
characters. The primary advantage of this ASCII mode is that it allows time intervals
of up to one second to occur between characters without causing an error.
PWR2
P-Fail
DC12-48VDC12-48V
PWR1
V2-V2+V1-V1+
1A@24V
1
2
1
2
P1P2Status
Default
EKI-1222
Tx
Rx
Tx
Rx
SerialPorts
PWR2
P-Fail
DC12-48VDC12-48V
PWR1
V2-V2+V1-V1+
1A@24V
1
2
1
Default
LAN
SerialPorts
SerialPorts
P1P2 Status
EKI-1221
Tx
Rx
Ethernet 1
Ethernet 2
1
2
RS232
(Modbus / Ascll)
(Modbus / RTU)
(Modbus / Ascll) RS485
(Modbus / RTU) RS485
R
/ Asc
RTU
R
(Modbu
us /
(Mo
(
dbu
u
s /
PC
Host (PC)
EKI 1222
EKI 1221
PLC
Modbus / TCP
Master Device
o
o
RTU)
485
RS485
U) RS4
A
(Mo
(
(Mo
(M
Asc
Ascll)
(Modbus / A
/
A
A
PWR2
P-Fail
DC12-48VDC12-48V
PWR1
V2-V2+
V1-V1+
1A@24V
1
2
13
24
P1P2
Status
Default
LAN
SerialPorts
EKI-1224
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Ethernet 1
RS232/422/485
Ethernet 2
Mode RTU ASCII
Coding System 8-bit binary.
Two hexadecimal character con-
tained in each ASCII character of
the message
Hexadecimal.
One hexadecimal character con-
tained in each ASCII character of
the message
Bits per Byte 1 start bit,
8 data bits,
1 bit for even/odd parity; no bit for
parity
1 stop bit if parity is used;
2 bits if no parity
1 start bit,
7 data bits,
1 bit for even/odd parity; no bit for
parity
1 stop bit if parity is used;
2 bits if no parity
Error Check CRC LRC

EKI-1200 Series User Manual 6
2.1.4 Modbus ASCII
As a new extension of Modbus/RTU, the Modbus/TCP protocol defines how Modbus/
RTU messages are encoded within and transported over TCP/IP-based networks.
Modbus/TCP is just as simple to implement and flexible to apply as the original Mod-
bus/RTU. The Modbus/TCP protocol is defined by its form of encapsulation for a
Modbus request or response. That means the Modbus request or response data is
encapsulated in TCP frame that has a six-byte header in Modbus/TCP protocol.
Modbus/TCP enables the use of Modbus messaging in an Intranet running the TCP/
IP protocols. Modbus/TCP is most commonly used for Ethernet attachment of PLC’s
or I/O modules to other simple field buses or I/O networks.
2.2 Specifications
Specifications Description
Interface I/O Port EKI-1211: 1 x RJ45 + 1 x RS-232/422/485
EKI-1221: 2 x RJ45 + 1 x RS-232/422/485
EKI-1221I: 2 x RJ45 + 1 x RS-232/422/485
EKI-1221I-MT: 1 x RJ45 + 1 x RS-232/422/485
EKI-1222I-SC: 1 x RJ45 + 2 x RS-232/422/485
EKI-1221CI-DE: 2 x RJ45 + 1 x RS-232/422/485
EKI-1222: 2 x RJ45 + 2 x RS-232/422/485
EKI-1222I: 2 x RJ45 + 2 x RS-232/422/485
EKI-1222CI-DE: 2 x RJ45 + 1 x RS-232/422/485
EKI-1224: 2 x RJ45 + 4 x RS-232/422/485
EKI-1224I: 2 x RJ45 + 4 x RS-232/422/485
EKI-1224CI: 2 x RJ45 + 4 x RS-422/485
Power Connector Terminal block
Physical Enclosure Metal with solid mounting hardware
Installation DIN-Rail and Wall mount
Dimensions
(W x H x D)
EKI-1211: 46 x 85.1 x 21.2 mm
(1.81" x 3.35" x 0.83")
EKI-1221/1222: 30 x 140 x 95mm
(1.18" x 5.51" x 3.74")
EKI-1224: 42 x 140 x 95mm
(1.65" x 5.51" x 3.74")
LED Display System LED EKI-1211: Power, Status
EKI-122x: Power 1, Power 2, Status
Port LED LAN: Speed, Link/Active
Serial: Tx, Rx
Environment Operating
Temperature
EKI-1211/EKI-1221/EKI-1222/EKI-1224:
-10°C ~ 60°C (14°F ~ 140°F)
CI models: -40°C ~ 70°C (-40°F ~ 158°F)
I models: -40°C ~ 75°C (-40°F ~ 167°F)
Storage
Temperature
EKI-122x: -20°C ~ 80°C (-4°F ~ 176°F)
EKI-1211: -40°C ~ 85°C (-40°F ~ 185°F)
Ambient Relative
Humidity
5 ~ 95% RH

7 EKI-1200 Series User Manual
Ethernet
Communications
Compatibility IEEE 802.3, IEEE 802.3u
Speed 10/100 Mbps
Port Connector EKI-1221: 2 x RJ45
EKI-122x: 8-pin RJ45
Protection EKI-1211: built-in 2.25 KV magnetic isolation
EKI-122x: built-in 1.5 KV magnetic isolation
Serial
Communications
Port Type EKI-1211: RS-232/422/485
EKI-122x: RS-232/422/485, software selectable
CI models: RS-422/485
Port Connector DB9 male
Data Bits 5, 6, 7, 8
Stop Bits 1, 1.5, 2
Parity None, Odd, Even, Space, Mark
Flow Control XON/XOFF, RTS/CTS
Baud Rate EKI-1211: 300 bps ~ 230.4 kbps
EKI-122x: 50 bps ~ 921.6 kbps, any baud rate
setting
Protection EKI-1211: Built-in 8 KV ESD for all signals
EKI-122x: Built-in 15 KV ESD for all signals
CI models: 2KV Isolation for RS-422/485 signals
Power Power
Consumption
EKI-1211: 1W
EKI-1221: 3.2W
EKI-1222: 3.2W
EKI-1224: 4.1W
Power Input EKI-1221: 9 ~ 36VDC
EKI-122x: 12 ~ 48VDC, redundant dual inputs
Software OS Support 32-bit/64-bit Windows 2000/XP/Vista/7/8/8.1/10, Win-
dows Server 2003/2008/2008 R2/2012/2012 R2
Utility Advantech EKI Device Configuration Utility
Operation Modes Modbus RTU Master/Slave mode
Modbus ASCII Master/Slave mode
Configuration Windows Utility, Web Browser
Protocols Modbus RTU, Modbus TCP, Modbus ASCII
Regulatory
Approvals
EMC CE, FCC Part 15 Subpart B (Class A)
Specifications Description

EKI-1200 Series User Manual 8
2.3 Hardware
2.3.1 Front View
The following view depicts the EKI-1211.
Figure 2.3 EKI-1211 Front View
No. Item Description
1. Terminal block Connect cabling for power wiring.
2. Serial port DB9 pin-out, supports RS-232/422/485
3. System LED panel See “LED Indicators” on page 19 for further details.
4. Ground terminal Screw terminal used to ground chassis.
Status
RX
TX Default
LNK /
ACT
ON:100M
OFF:10M 9-36 VDC
EKI-1211
4
3
2
1

9 EKI-1200 Series User Manual
The following view depicts the EKI-1221.
Figure 2.4 EKI-1221 Front View
No. Item Description
1. System LED panel See “LED Indicators” on page 19 for further details.
2. Default button Press for at least 10 secs. to rest device to default settings.
3. ETH port RJ45 ports x 2
4. Serial port DB9 pinout, supports 232/422/485
1
2
Default
LAN
TxRx
P1 P2 Status
Serial ports
EKI-1221-CE
1
2
3
4

EKI-1200 Series User Manual 10
The following view depicts the EKI-1221I-MT.
Figure 2.5 EKI-1221I-MT Front View
No. Item Description
1. ETH port RJ45 port
2. Fiber Port ST multi-mode fiber port
3. Serial port DB9 pinout, supports 232/422/485
4. System LED panel See “LED Indicators” on page 19 for further details.
EKI-1221I-MT
TxRx
LNK/ACT
LAN1 LAN2
Serial port
1
P1 P2 Status
1
3
2
4