StarTech.com NETRS2321E User manual

Serial Over IP Ethernet
Device Server
1 Port RS-232/422/485 Serial
over IP Ethernet Device Server
NETRS2321E
NETRS2321EEU
NETRS2321EGB
Instruction Manual
Manual Revision:10/13/2010
For the most up-to-date information, please visit www.startech.com

FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Use of Trademarks, Registered Trademarks, and other Protected Names and Symbols
This manual may make reference to trademarks, registered trademarks, and other
protected names and/or symbols of third-party companies not related in any way to
StarTech.com. Where they occur these references are for illustrative purposes only
and do not represent an endorsement of a product or service by StarTech.com, or an
endorsement of the product(s) to which this manual applies by the third-party company
in question. Regardless of any direct acknowledgement elsewhere in the body of
this document, StarTech.com hereby acknowledges that all trademarks, registered
trademarks, service marks, and other protected names and/or symbols contained in this
manual and related documents are the property of their respective holders.

i
Table of Contents
Introduction..................................................................... 1
Packaging Contents.....................................................................1
System Requirements .................................................................1
Top View ......................................................................................2
Left Side View..............................................................................2
Right Side View ...........................................................................2
LED Indicators.............................................................................3
Wiring Architecture ......................................................................3
Installation....................................................................... 4
Device Management Utility..........................................................4
Web Console Configuration.........................................................6
Controller Update ........................................................................11
Virtual COM Port .........................................................................11
Factory Default Setting ................................................................14
Self-Testing ..................................................................... 15
Hyper Terminal for TCP/IP WinSock............................................15
Troubleshooting .............................................................. 17
Specifications.................................................................. 18
Technical Support........................................................... 19
Warranty Information...................................................... 19

1
Introduction
The StarTech.com RS-232/422/485 Serial Over IP Adapter is the
ideal solution for remotely controlling serial devices across a TCP/
IP network. Featuring a user-friendly, browser-based configuration of
network settings, serial port line settings, UART transmit/receive buffer
trigger levels and serial port flow control.
The serial over IP adapter also offers remote Telnet configuration and
support for IP, HTTP, ICMP and TCP network protocols, while providing
data transfer rates of up to 115.2Kbps per port.
Packaging Contents
• 1 x NETRS2321E / GB / EU adapter
• 1 x Power Adapter
• 1 x Instruction Manual
• 1 x Software CD
System Requirements
• 10/100 Mbps compatible TCP/IP Ethernet network
• Available power outlet at adapter location
• Virtual COM software: Microsoft®Windows®XP (32/64-bit)/Vista
(32-bit)/7 (32-bit)

2
Top View
Left Side View
Right Side View
*actual product may vary from photos

3
LED Indicators
• PWR (Green) - Power indicator
• Data (Red) - Data sent and received indicator
• 10/100 (Green) - Network signal indicator. When illuminated,
network connection is present.
• LED (Red) - Device status indicator. When operating under normal
status, this LED will blink once per second.
Wiring Architecture

4
Installation
Device Management Utility
The Device Management Utility that is included with NETRS2321E
(EM.exe) is used to detect and setup the installed adapter. When this
tool is installed and activated, it will detect the existence of the installed
adapter, and depict its status including IP Address, Subnet Mask,
MAC Address and Device ID as shown below. The Setup Tool can only
configure one adapter at a time, therefore if there are multiple adapters
installed on the network, please ensure that they are not connected (or
shut down) prior to installation.
Due to the nature of broadcast UDP packets, EM has the following
characteristics:
• Broadcast packets are not limited by subnet. Even if the IP Address
of the converters and the computer running EM do not belong to the
same subnet, it will still function correctly.
• Broadcast packet signals cannot be passed through a router. EM
can only be used to monitor devices with EM installed, in the same
segment of the LAN.
To begin using the Device Management Utility, copy the file titled
EM.exe from the Driver CD that accompanied your NETRS2321E
purchase, to your desktop. The file can be located in the following path
on the Driver CD:
E:\IO_over_IP\Utilities\Em (E: represents the CD/DVD-ROM drive)
Once the file has been copied to the desktop, connect NETRS2321E
to your LAN, using the available LAN port. Connect the included power
adapter (9V DC, 500mA) to the power port provided on NETRS2321E.
Wait for a few moments for the device to be detected, and double click
on the EM.exe icon to launch the application:

5
To refresh the status of the adapter network connection, click on View,
then Refresh. This should be performed following any configuration
changes.
To configure the IP Address assigned to NETRS2321E, click on
Config, then IP Address. Assign an IP Address with the same Subnet
Mask of your computer, ensuring that the address that is assigned is
not already in use on the network. When you press the OK button, the
IP Address will be refreshed within 2-3 seconds.

6
NOTE: Because the Device Management Utility uses broadcast UDP
packets, configuration is only allowed when the device’s password is
left empty.
Web Console Conguration
In addition to basic IP Address and subnet mask, specific device
settings can be set using an Internet browser, such as Internet
Explorer or Netscape etc.
If the IP Address of the adapter is already known (default is
192.168.0.10), enter it into the browser address line to launch the
Login Page.
The Login Page
Once the Login Page has been launched (as shown on page 6), the
following will be displayed:
System time elapsed
The time elapsed since the adapter was connected to the LAN will be
displayed here.
Firmware version
The installed firmware will be identified here by date code.
Serial number
The adapter serial number consists of five digits and a unique MAC
address used by the network in hexadecimal format.
Password (Setup login)
This field allows you to enter the administration password for
authentication. By default, the password is left empty. If you have
changed the password to something other than the default, press and
hold the Reset button (located next to the RJ45 port) for five seconds.
The adapter will power cycle; once it has been re-detected on the
network, the password will have been reset to default. Please note that
if there are more than three consecutive incorrect password attempts,
the login function will be disabled for 15 minutes. During this period,
even if the correct password is supplied, the login will not proceed

7
The Setup Page
Once the correct password has been entered in the Setup Login
password field, click on Login to enter the Setup Page, which offers
advanced configurability. The elements that can be configured are as
follows:
IP Address
Allows you to modify the assigned IP Address of the adapter. Do not
enter a value that is already in use on the connected network. If DHCP
client mode is enabled, and there is a DHCP server on the network,
this field will automatically be assigned.
Subnet Mask
This field allows configuration of the subnet mask address, to which
the adapter is connected. If your subnet mask is provided by an ISP or
internal network administrator, please inquire as to what this setting is,
and enter it into this field. If DHCP client mode is enabled, and there is
a DHCP server on the network, this field will automatically be assigned.
Gateway address
This field contains the gateway or router IP address. If your gateway
address is provided by an ISP or internal network administrator, please
inquire as to what this setting is, and enter it into this field. If DHCP
client mode is enabled, and there is a DHCP server on the network,
this field will automatically be assigned.