Westermo EDW-120 - Manual (Page 10)

10 6616-2211
Introduction
The EDW-120 is an Industrial Ethernet to serial adapter. The serial interface has two
parallel RS-232 ports. The Ethernet interface is 10/100BASE-T and supports the
following networking protocols: TCP, UDP, ICMP, IGMP, HTTP, ARP.
Two EDW-120 can be used to provide a serial point to point link over an Ethernet
network using either UDP or TCP. When using TCP the EDW-120 can be configured
as client or server.
Each unit passes data from
its serial interface to the
serial interface of the other
unit.
This enables long distance
serial communication using
pre-existing networks.
When EDW-120 is used
with the UDP protocol it
is also possible to
communicate one to many
(e.g. master to multiple
slaves), by using a broadcast
address or multicast
addressing
Network
Serial
Device
Configured
as UDP- or
TCP-server
Configured
as UDP- or
TCP-client
Serial
Device
Serial
Master
Serial
Slave
Serial
Slave
Serial
Slave
Network
Broadcast
Multicast
EDW-120 can also provide a remote serial interface for
a computer connected through a TCP/IP network using
a Virtual IP software.
A COM port redirector or customer written software
can be used to create virtual COM ports. This software
will redirect data, originally sent to a local COM port, to
the remote serial interface of the EDW-120. No changes
are required on the computer application software.
Together with the unit Virtual IP is delivered, this software
enables connection of 255 COM ports to virtual IP
addresses.
Application software
Data to / from COM3
Data to / from COM4
Data to / from COM5
Data to / from COM255
COM port
redirector software
Network
COM3
COM4
COM5
COM255
Netw
ork
Interface