User manual

ADAM-4572 & EKI-122X Series User Manual 2
1.1 Overview
Advantech’s ADAM-4572 and EKI-1221/1222/1224/1221D/1222D series of Modbus
Gateways (the following manual will use EKI-122X series instead of complete model
name) are a robust, feature-rich, and cost effective way to integrate of Ethernet and
Serial Modbus devices. The ADAM-4572 and EKI-122X series provides one, two or
four serial ports, one or two Ethernet ports, 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 series 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 series greatly improves
the device connectivity reliability, increase system stability, and simplify the
redundant configuration.
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 ADAM-4572 and EKI-122X series provides a
feature that can allow users to select master or slave operation for each serial port.
The ADAM-4572 and EKI-122X series not only allows Ethernet master can control
serial slaves, but also allow serial masters to control Ethernet or serial slaves.
Furthermore, the EKI-122X series can allow both Ethernet and serial slaves to be
controlled by both Ethernet and serial masters.
The ADAM-4572 and EKI-122X series supports various operating modes: RTU
Master, RTU Slave, ASCII Master, and ASCII Slave.
1.2 Features
 Provides dual 10/100 Mbps auto-sensing Ethernet ports (EKI-122X series only)
 Integration of Modbus TCP and Modbus RTU/ASCII networks
 Supports COM port's baud rate up to 921.6 kbps
 Supports up to 16 TCP connections and 32 requests simultaneously
 Supports 31 slaves (RS-485) per serial port
 Supports auto-bypass function (EKI-1221D/1222D only)
 Software selectable RS-232/422/485 communication
 Auto searching slave ID over configuration utility
 Mounts on DIN-rail, wall, or panel
 Class I, Division 2 certificate for EKI-122X series