User manual Version 2.3
ABLELink
®
Ethernet-Serial Server GW21R
1. Introduction
The Atop GW21R Ethernet-Serial Server is a gateway between Ethernet (TCP/IP) and RS-232/RS-485
communications. The information transmitted by GW21R is transparent to both host computers (Ethernet)
and devices (RS-232/RS-485). Data coming from the Ethernet (TCP/IP) is sent to the designated
RS-232/RS-485 port and data being received from RS-232/RS-485 port is sent to the Ethernet (TCP/IP)
transparently.
In the computer integration manufacturing or industrial automation area, the Atop GW21R Ethernet-Serial
Server is used for field devices to direct connect to Ethernet network. Terminal Server (main control
program run in GW21R) transforms whatever data received from RS-232/RS-485 to TCP/UDP port then
connect devices to the Ethernet network via a single application program or multiple application programs.
Many control devices provide the ability to communicate with hosts through RS-232/RS-485 however
RS-232/RS-485 serial communication has its limitations. For one, it is hard to transfer data through a long
distance. With Atop GW21R, it is possible to communicate with a remote device in the Intranet
environment or even in the Internet and thus, increases the communication distance dramatically.
GW21R from Atop Technologies Inc. offers one RS-232/ RS-485 port, one RJ45 Ethernet and Watch-Dog
Timer etc.
1.1 Packaging
Atop Ethernet-Serial Server x 1
Atop Ethernet-Serial Server quick start guide x 1
Product CD containing configuration utility and sample programs x 1
Copyright © 2004 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
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