This manual covers several different models of NetCom Devices, in
particular the Wireless operating devices. In general the operation is the
same on all models, except where explicitly noted otherwise.
The VS NetCom devices are designed to remotely operate serial ports
over networks. The new network interface is WLAN (Wireless LAN
according to 802.11g) with 54Mbit/s transfer rate. The interface of
100Mbit/s Ethernet as on all cable operated models is also available.
The transport is implemented via TCP/IP protocol. Therefore control is
available via WLAN, Ethernet, Intranet and Internet. Starting with
Firmware version 2.2 all communication with the device may happen
encrypted with strong algorithms.
The supplied driver software hides the network transfer from your
applications. Software applications using standard COM ports need no
change to operate via NetCom through the virtual serial ports.
The devices come with a steel case well suited for industrial
environments.
NetCom supports high serial speeds up to 3.6 Mbps. All serial ports
operate in three configurable ways. There is the common RS-232 mode
(up to 921 kbps), and the ports also offer the industrial RS-422 and
RS-485 configuration (up to 3.6 Mbps). In RS-485 mode the NetCom
may use the Automatic Receive Transmit (ART) control logic to follow
the RS-485 specifications for transmitting data. No special code is
necessary to be implemented in your software applications.
2.1. FEATURES
Single power supply DC 9V-30V, 200-600 mA@12V
AC 100-240V 47-63Hz, 25VA
Wireless LAN 802.11b/g for 54Mbit/s
Ethernet 10/100BaseTx for auto-configuration
Three serial port interfaces: RS-232, RS-422 and RS-485
Max. 3.686.400 bps, half- and full-duplex
TCP/IP configuration fixed or by DHCP
Easy remote configuration via SNMP
Drivers for Windows™ and Linux operating systems
Documented interface for every networked operating system
Page 11
NetCom 123 WLAN, 423 WLAN,
2.2. PRODUCT SPECIFICATIONS
Most of the characteristics are common for all models. However some
must differ from model to model.
2.2.1. COMMON CHARACTERISTICS
Processor ARM9 (KS8695P)
Memory 16MB SDRAM
2MB Flash
WLAN antenna SMA-reverse
Ethernet connector RJ45 10BaseT/100BaseTx
Serial connector DB9 male (similar to PC)
Serial Speed 1 bps up to 3.69 Mbps
Parity None, Even, Odd, Mark, Space
Data bits 5, 6, 7, 8
Stop bits 1, 2 (1.5)
Serial signals
Protocols TCP/IP, UDP, SNMP, DHCP, ICMP, ARP,
Serial operation RS232, RS422/485 configured by DIP switch
Management Serial console, Telnet, Webbrowser, SNMP
Driver software Windows 2000/XP, Windows NT, Linux
Management software Driver installation and configuration program,
Operating temp. 0° to 55°C
Approval CE, FCC
Table 1: Specifications, common
RS-232 TxD, RxD, RTS, CTS,
DTR, DSR, DCD, RI, GND
RS-422,
Tx+/Tx-, Rx+/Rx-, GND
RS-485 4-wire
RS-485 2-wire Data+/Data-, GND
Telnet, RTelnet, HTTP
or by software
Management console
823RM WLAN, 1623RM WLAN
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12
2.2.2. SPECIFIC CHARACTERISTICS
2.2.2.1. NetCom 123 WLAN
Power requirement DC 9V to 30V, 300 mA@12V
Dimensions
Weight 250 g
Table 2: Characteristics of NetCom 123 WLAN
2.2.2.2. NetCom 423 WLAN
Power requirement DC 9V to 30V, 400 mA@12V
Dimensions
Weight 500 g
Table 3: Characteristics of NetCom 423 WLAN
2.2.2.3. NetCom 823RM WLAN (19” version)
Power requirement AC 100V to 240V, 47-63Hz, 25VA
Dimensions 258×149×45 mm³ (W×D×H)
Weight 1350 g
Table 4: Characteristics of NetCom 823RM WLAN
73×115×27 mm³ (W×D×H)
101×121×27 mm³ with connectors
169×93×29 mm³ (W×D×H)
169×99×29 mm³ with connectors
278×155×46 mm³ with connectors
2.2.2.4. NetCom 1623RM WLAN (19” version)
Power requirement AC 100V to 240V, 47-63Hz, 25VA
Dimensions
258×149×45 mm³ (W×D×H)
278×155×46 mm³ with connectors
Weight 1450 g
Table 5: Characteristics of NetCom 1623RM WLAN
2.3. PACKING LIST
√
VS NetCom
Power supply adapter,
√
12V 1 A for NetCom 123 WLAN and NetCom 423 WLAN Power cord for NetCom 823RM WLAN and 1623RM WLAN
CD-ROM with driver and configuration software
√
Quick Installation Guide
√
Page 13
NetCom 123 WLAN, 423 WLAN,
3. HARDWARE CONFIGURATION
3.1. POWER SUPPLY
The NetCom device is powered by a single 9-30V power supply. It
requires 200 mA up to 1500 mA of current, depending on the device
type and voltage supplied. A suitable power supply adapter is part of
the packaging. Connect the cable to the power jack at the rear side of
NetCom, and put the adapter into the socket. For the 19” devices of
course just plug the power cord into the socket.
The Power LED on NetCom (red) will light.
You can connect a power supply of your choice, providing the technical
requirements are met.
3.2. NETWORK
The NetCom may use WLAN or Ethernet at customers choice. By
factory settings both interfaces are enabled, and the priority is set for
Ethernet (via cable). If no cable is connected here, the Wireless
interface is active. Both interfaces use the same MAC Address, to allow
for seamless failover from cable to wireless operation.
3.2.1. WLAN A NTENNA
The connector used for the WLAN Antenna is known as SMA-Reverse.
This is a standard type to allow for simple connection of different equipment. Just fit the supplied antenna by carefully screwing it to theconnector. You are free to connect a cable and a different antenna of your choice, as long as it is designed for WLAN. When the NetCom detects an operational WLAN it can connect to, the Blue LED lights.
3.2.2. WLAN C ONFIGURATION
The pre-defined operation mode is ad-hoc, which means you do not
need an Access Point to get access to the NetCom. Any computer with
WLAN equipment may contact the NetCom. The configuration of the
NetCom is done with the tools described later. This is the most easy
way of installation.
However the Ad-hoc mode is not encrypted by definition. As a result
any station can read the data transferred to the NetCom. This also
includes the passwords. Further in case of problems, it is harder to find
the source of the problems. Therefore the recommended method is to
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823RM WLAN, 1623RM WLAN
14
use the Ethernet connector for the first configuration. Or in case of
doubt, use the serial port for this.
The configuration of the WLAN parameters should follow in a later
step. This is especially the case, if encryption or certain other
parameters require certain configuration.
3.2.3. ETHERNET
The connector for Ethernet is the usual RJ45. Simply connect it to your
(switching) Hub. When the connect is done the Link LED on NetCom
(yellow) will light. When data traffic occurs on the network, this LED
will blink. It depends on your network whether a 100Mbit or a 10Mbit
connect will be established. A 100Mbit net causes the Speed LED on
NetCom (green) to light, otherwise it will remain dark.
Red LED Yellow LED Green LEDStatus
Off -- -- Device off, no power
On Off Off No connection
On On Off 10Mbit connection established
On Blink Off 10Mbit data transfer (traffic)
On On On 100Mbit connection established
On Blink On 100Mbit data transfer (traffic)
Table 6: LED Function
3.3. SERIAL PORT SIMPLE SETTINGS
There is one set of 4 Dip switches to configure the operation mode of
the NetCom Device. This switch is the Master configuration for each
serial port. All ports operate in the same mode, unless the DIP switches
configure for software setting. Before connecting a serial device, the
serial port configuration must be completed.
Warning: a bad configuration may cause serious damage in the
NetCom or the connected device.
To avoid these problems, it is recommended not to connect a device to
the serial ports in the first installation. The serial ports should be
configured for RS232. This is done by setting the DIP switches like this
example.
Image 1: Master Switch
Standard Configuration
Page 15
NetCom 123 WLAN, 423 WLAN,
4. WINDOWS DRIVER QUICK INSTALLATION
This section describes the minimum steps required to install the
Windows Driver and Management programs. Most configuration
options are ignored. They are covered in later sections.
Before starting installation, it is essential to have an IP configuration
ready for the NetCom Device to install. You may read the section
TCP/IP Description below. In many networks the default configuration
is fine. If in doubt, please ask your Network Administrator for help.
The following description is based on Windows XP Professional, with
Service Pack 2 installed. The installation on other configurations of
Windows XP is similar.
Further it is assumed the network access is functional. It is
recommended to use Ethernet via Hub or Cross-Over cable.
4.1. INSTALLATION PROCEDURE
The installation of drivers is described first. This is followed by a
procedure to verify a correct installation. The last part of this section is
the uninstall process.
4.1.1. START THE INSTALLATION WIZARD
This is the Installation Wizard, it is named
VSNSETUP.EXE. You’ll find it on the CD-ROM
shipped with the NetCom, in the directory responsible
for your operating system. The drivers are also
Image 2:
Installation Wizard
drivers.
available on the Internet, in the latest version. The
Installation Wizard for Windows NT is named
VSNSTUNT.EXE. Start this program to install the
Your screen displays a VScom logo. Select the folder to install
programs and drivers into. In most situations the suggested setting is
fine, just hit enter.
Image 3: Start Driver Installation
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823RM WLAN, 1623RM WLAN
Page
4.1.2. FIND AND CONFIGURE NETCOM DEVICES
Some files are copied to your hard disk, this is the usual process similar
to other Windows installations. When all files are copied, the
NetCom Manager
NetCom Devices on your network.
1
program is started. This searches for all
Image 4: Discover and Select NetCom Devices for Installation
After short time the search process is finished. All
discovered NetCom are listed. In your very first
installation of NetCom Devices and Drivers you should
connect only one NetCom to your network. This single
Image 5: NetCom
in Manager
1
This program is covered in detail in a later section. For now follow the minimum
steps.
Page 17
Device is listed here. Identify it by comparing the serial
number shown in the NetCom Manager.
NetCom 123 WLAN, 423 WLAN,
4.1.2.1. Configure IP Parameters
As mentioned above, it is important to configure the NetCom to operate
in your network. In many networks this is done by a special server.
Please ask your Network Administrator for information. If you need to
define parameters manually, double-click the devices icon.
Image 6: Define NetComs IP Configuration
This panel opens. Deselect the Option of “Use DHCP”, and place your
parameters as “IP address”, “Netmask” and “Broadcast”. Click on the
“OK” button.
4.1.2.2. Configure Firewall
As you will see in Image 6 the driver may also operate by traversal of a
Network Firewall. This requires a special configuration, which is
skipped here. Please read in detail in section 5.2.6 Manual
Detection/Installation of a NetCom. For now proceed with the standard
installation.
18
823RM WLAN, 1623RM WLAN
Page
4.1.3. INSTALL DRIVERS
You are now back in the NetCom Manager. Click the “OK” button, the
installation continues. Windows detects the serial ports on the fresh
NetCom as new Hardware. Since Windows XP Service Pack 2 you are
asked about to get latest drivers.
Image 7: Use current drivers dialog
There are no later drivers on the Windows Update website. Select the
third item, and click on “Next”. This question neither appears on
Windows XP prior to SP2, nor on any previous Windows version.
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NetCom 123 WLAN, 423 WLAN,
Image 8: Install drivers for the serial ports
The pre-selected automatic installation is fine, just click on “Next”. The
driver files are already copied to your hard disk. Now Windows installs
them in the system directory. To “Finish” the installation click on that
button as it appears.
These latest steps happen for each serial port on the NetCom Device.
Just repeat the procedure, until all ports are successfully installed.
Windows will show you this.
In most situations it is not required to reboot the system. Of course you
can do that now, to test the drivers.
4.2. VERIFY THE INSTALLATION
Image 9: VScom drivers in the Start Menu
In the Start Menu you’ll find “Vision Systems GmbH”, a new program
group. The installed programs are the NetCom Manager and an option
for uninstallation. This group is not installed on Windows NT.
20
823RM WLAN, 1623RM WLAN
Page
Image 10: NetCom in Device Manager
In the Device Manager the serial ports are listed in the usual section
“Ports”. Additionally there is a new device class
“VScom Virtual Com”. All installed NetCom Devices are listed herein.
The available options are described later.
On Windows NT there is no Device Manager. You’ll
find the serial ports listed in the Control panel in the
Image 11:
NetCom Manager NT
“Ports” applet. To configure the NetCom and special
port options, there is a new applet named NetCom
Manager.
Page 21
NetCom 123 WLAN, 423 WLAN,
4.3. UNINSTALL THE DRIVERS
To completely uninstall the NetCom Drivers and files, there are three
methods. The usual way is to use the Add/Remove Programs applet in
the Control Panel, and remove the NetCom Drivers. This will start the
NetCom uninstallation program.
Image 12: Uninstall NetCom Drivers
As a second way you may start the Uninstall program in the start menu.
The third method is to start the Installation Wizard again. This will
detect the drivers on the system. You have the options to repair the
current installation, or to remove the installed drivers.
823RM WLAN, 1623RM WLAN
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22
5. SOFTWARE CONFIGURATION
The NetCom Devices may also be used without the installation of a
driver software. Customer applications contact the NetCom directly,
using network functions. These setups require independent
configuration of the NetCom Device and the serial ports. There are
several ways to do this configuration. The NetCom offers a
Webbrowser interface, a Manager program to use in Windows,
configuration via serial port, via Telnet and also via SNMP. This SNMP
option is not covered in this manual, please see separate documentation.
The serial port option is a fallback, if every other way of configuration
fails. The options are here described in the order Web, Manager
program, Telnet and serial port.
Configurations via Webbrowser and via Telnet require
a functional TCP/IP connection to the NetCom Device.
Image 13:
NetCom Manager
is a very minimal description of this program. You find this program on
the CD-ROM shipped with the NetCom Device. In Windows 2000, XP
and 2003 it is named NETCOMMGR.EXE, while in Windows NT the
name is NETCOMMGRNT.EXE. Just double-click to start it direct
from the CD-ROM. If you already installed the drivers, the program is
also in the Start Menu.
And you must also know the IP-Address of the
NetCom, to contact it. The easiest way to retrieve this
information is the NetCom Manager program. So here
Page 23
NetCom 123 WLAN, 423 WLAN,
Image 14: NetCom Manager Servers Panel
Identify the NetCom Device by comparing the serial number.
Double-click the Icon of the NetCom. You’ll see the IP-Parameters.
Note the “IP address”, to use it in your browser or via Telnet.
Image 15: NetCom IP-Parameters
823RM WLAN, 1623RM WLAN
24
Page
5.1. CONFIGURE IN WEB-INTERFACE
Open your Webbrowser. In the address line type the address of the
NetCom Server. In the example from above type http://192.168.254.254
as the target. You may do this on any operating system you prefer.
Image 16: Webinterface for configuration
The NetCom welcomes you with its “Home” screen. To access the
different options of configuration, the images above function as a link.
In many menus you’ll see a blue question mark. This is a symbol for
help. When clicked a short explanation pops up, informing about the
function of this parameter. Some other settings require a reboot to save
and activate them. Whenever this situation occurs, the NetCom requests
a REBOOT.
It is done like this here, you may
reboot now, or do that later when
the configuration is finished.
Image 17: Webinterface Request to Reboot
Page 25
NetCom 123 WLAN, 423 WLAN,
5.1.1. WEBBROWSER SERVER CONFIGURATION
The Server Configuration is a very long menu. It is divided in its logical
sections throughout this document. There is basic server information,
the server parameters related to the IP-configuration, the parameters for
Wireless communication, the section for encrypted communication,
Password settings, and finally the configuration for date and time.
5.1.1.1. Server Info
Information about the selected
NetCom is displayed as
“Server Info”. Starting with the
“Server Type”, this is the model of
the NetCom, followed by the
version of Software and Hardware.
This will give a rough overview,
which features are implemented,
Image 18: Web Panel Server Information
important to identify the device you are configuring right now. For
further information the “UpTime” is listed. “Contact” and “Location”
are User-defined information. They may later help to find the device in
the installation, and the person responsible for management.
or need an upgrade of the
firmware. The “Serial Nr.” is
823RM WLAN, 1623RM WLAN
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26
5.1.1.2. Server Parameter
The “Server Parameter” allow
configuration of the NetComs
name and of course all
parameters in IP-settings. The
Server Name is used as the
ESSID of the Wireless Ad-hoc
mode. Generally it is used as
information, e.g. in the
NetCom Manager program or in
SNMP. You may choose the
network interface as
Wireless
or both (with
Cable,
priority).
Manual changes of IP parameters
are only available with “DHCP”
set as
Disabled. When DHCP
is not used, enter “IP Address”
and “Netmask”, as well as the
Image 19: Web Panel Server Parameter
“Broadcast” address. “Gateway”
is required, if there are Routers
in the network. DNS is used to access other stations by name. The
“ConfigPort” is used to access the NetCom for administration via
Telnet. It is suggested to use the standard value for Telnet, TCP port
number 23. However it may be changed for different purposes. This
does not change the function of the Telnet menus.
Firmware version 2.2 introduces the new function as Print Server. The
TCP Port defined by RFC1194 is 515, under certain circumstances you
may change the “PrintServerPort”. More about Print Server function at
the configuration of the serial ports.
“KeepAlive” is an intrinsic function of the TCP/IP protocol. If used it
causes network traffic, but problems are detected earlier. In a LAN this
is usually not a problem. However, if used via DialUp connections this
may cause problems. If this functions is used, you must define an
interval in seconds. NetCom has a better chance to react on network
problems, or failed hosts. Even dropping an old connection may be
useful in certain environments.
Page 27
NetCom 123 WLAN, 423 WLAN,
5.1.1.3. Wireless Parameter
To operate a Wireless device, a lot of parameters are required. The
configuration in the NetCom is reduced to a small set of them, for ease
of configuration.
“SSID” is the «Service
Set Identifier». This is
used to get access to
radio cells established by
an Access Point. By
default it is built from the
serial number, as
identification in Ad-hoc
mode.
The “OperationMode” is
Image 20: Web Panel Wireless Parameter
selectable as
a direct connection from
Ad-hoc for
wireless stations to other
stations, and also as
infra to select the «Infrastructure Mode». This
mode is required to connect to an Access Point. Other wireless stations
such as a PC or Laptop use the Access Point to transfer the data to the
NetCom.
The “WirelessMode” is available as
11b and 11b+g. It may be
necessary to use the restriction of 11b when compatibility problems
with other clients occur.
WLAN as of IEEE 802.11b/g define eleven possible channels (i.e.
predefined frequencies) to use with WLAN devices.
The available “CountryRegion” values are
FCC(1-11) for North America.
In Infrastructure Mode the NetCom adapts to the configuration of
the Access Point.
The “Channel” is used in Ad-hoc mode.
“Encryption Type” defines the encryption of the radio transmission. It
may be
Off, WEP or WPA-PSK/TKIP. The WEP encryption may use 40
823RM WLAN, 1623RM WLAN
Page
28
or 104 bit keys, sometimes also named WEP40/WEP64 or
WEP104/WEP128. Which of this is required is defined by the
“Encryption Key” Parameter. The key may be entered as ASCII
characters, or as hexadecimal for a binary key. A string with 5
characters is WEP40 using an ASCII key. Using 10 characters as key
defines this key as also WEP40, but with a binary key in hexadecimal
notation. Likewise a 13 character string is WEP104 with ASCII, and 26
characters select WEP104 with a binary key.
WPA Encryption is available for the TKIP protocol. The key is PSK
(Pre-Shared Key) and must be installed on all stations. It is
recommended to use WPA-PSK/TKIP with a binary key, generated
from random data.
“RTSThreshold” and “Fragmentation Threshold” are low level WLAN
parameters. They should match the configuration in the Access Point.
Higher values result in better data throughput. But when transmission
error occur, the impact is dramatic. In this case lower values provide
better security and better performance.
5.1.1.4. Encrypted Communication
Firmware version 2.2 introduces a way for encrypted communication
with the NetCom Serial Device Server. This function establishes an
encrypted VPN tunnel between your computer and the NetCom. All
communication to the NetCom uses this new connection. No
application requires a change of operation, but seamlessly gets the
advantages of Encryption.
To build this tunnel NetCom uses the Open Source product
OpenVPN™ (http://openvpn.net
). This is the configuration of the
parameters on the NetCom side. The function and the configuration of
OpenVPN™ is described with more details later in the section of
OpenVPN™ Client installation.
NetCom 123 WLAN, 423 WLAN Page 29
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