Elo TouchSystems E221 User Manual
Communication adapter
RS232 over the Ethernet
ELO E221
User manual
ELO E221ZKE001
Table Of Content:
1.0 Introduction.............................................................................3
1.1 Application.........................................................................3
2.0 How does it works?.................................................................4
3.0 Installation..............................................................................4
3.1 Ethernet connection............................................................4
3.2 RS-232 connection.............................................................4
3.3 Power supply......................................................................5
3.4 Driver installation..............................................................5
3.5 Virtual COM port installation............................................5
3.6 Virtual Port settings............................................................8
3.7 Uninstalling the adapter drivers.........................................8
3.8 Adapter configuration over the web interface....................8
3.9 Serial Port profiles...........................................................10
4.0 Testing...................................................................................13
5.0 Troubleshooting....................................................................14
6.0 Ordering info.........................................................................14
7.0 Technical info........................................................................15
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ELO E221ZKE001
1.0 Introduction
Ethernet as a communication medium becomes widely used not
only in commercial domain, but becomes more popular in industry
automation too. A RS232 interface is intended to connect two
devices with maximal cable length 15 meters. An adapter E221
allows to integrate the RS232 devices into the Ethernet network
thereby bridge long distances.
Bellow described adapter allows to connect two RS-232 devices
over the Ethernet network; it also allows to connect more devices to
a single network gateway (i.e. computer).
1.1 Application
This communication device altogether with supplied software
allows setting up following profiles:
1) Real Port profile. Adapter allows to connect a device with
RS232 interface straight to computer via Ethernet protocol
with virtual port application installed on,
2) Serial Bridge profile. Adapter connects two devices with
RS232 interfaces like they were connected by cable; it is
technique so called “serial tunnelling”
3) TCP socket profile. Configured as TCP client or TCP
server, establishes connection among these devices
4) UDP socket profile. Configured as UDP client or UDP
server, establishes connection among these devices.
5) Custom profile. Experienced user can access all settings
both network and serial interfaces.
Furthermore, there is possibility to create GPIO port (general
purpose input/output) with five output and/or input binary channels
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ELO E221ZKE001
to control or diagnose remote device. This GPIO maintain ±12V
levels. It can be configured to aware (e.g. by an e-mail) based on
states of those binary inputs.
2.0 How does it works?
The adapter converts RS232 signalling to the Ethernet interface. It
transfers all signals of the RS232 except RI. RS232 interface is
presented with DB9M (D-SUB, Canon), whereas Ethernet is lead
out via standard Ethernet RJ-45 socket.
Adapter can operate with full duplex with maximal bitrate
230kbps. The Ethernet layer can communicate with 10 and
100Mbps.
3.0 Installation
This chapter describes the adapter E221 installation process. The
process is divided to sub-process software and hardware
installation.
3.1 Ethernet connection
Adapter meets IEEE 802.3 specification and is to be plugged in to
the network with straight UTP cable. When configured as Serial
Bridge, the cross-over cable should be used instead.
For the first time, the adapter is configured to acquire IP address
from DHCP server, so in the network must be such a service to
dedicate IP address (e.g. AP – access point, router..). It can be later
changed to the fixed IP address.
3.2 RS-232 connection
A DB9M (D-SUB 9 pin Male) connector is wired as DTE, it means
that device with the same connector (DB9M), wired as DTE, must
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ELO E221ZKE001
be connected to the adapter with cross-over cable (null modem)
with DB9F (Female) connectors terminated. Device terminated with
DB9F can be connected straight to the adapter or over the straight
cable. All signals, TXD, RXD, RTS, CTS, DTR, DSR, DCD are
transmitted. Rx and Tx activity is indicated by LED indicators.
3.3 Power supply
The adapter can be powered with DC voltage source (range 9 to
24V) with DC connector (outer/inner diameter is 5.5/2.1 mm), inner
pin should have positive polarity. The adapter can be powered via
RS-232 connector too – positive is pin No.9, negative (ground) is
pin No.5. Powered status is indicated with green LED. The adapter
is secured against the polarity change.
3.4 Driver installation
The adapter's configuration software can operate on computers
under Operation systems both MS Windows and Linux/Unix, but
only Windows software is enclosed. Supported are version from
Win 98 to Vista. Unix/Linux software can be downloaded from
following address:
http://www.digi.com/support/productdetl.jsp?pid=2469&osvid=0&s=54&tp=1
A RealPort drivers you can find on supplied CD-ROM in
E220_drivers directory. The drivers can be downloaded from web
pages www.elo.cz too. If virtual COM port on PC is applicable, it is
neccessary to install the RealPort application. In other cases,
utilities DigiConf and DigiWiz would be used instead.
3.5 Virtual COM port installation
When connected to the network, and link device to a PC is
required, it is neccessary to install Virual Port application. Bellow
described process is for Windows XP, for other Windows version
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