Single Port Serial Server, 1 RS-232/422/485 port
Dual Port Serial Server, 1 RS-232/422/485 port, 1 RS-232 port
Quad Port Serial Server, 4 RS-232/422/485 ports
Features
Ethernet Enable 1, 2 or 4 Serial Ports
Compact Panel Mount Case
Optional DIN Rail Adapter
RS-232/422/485 Full and Half Duplex
Auto Detect 10/100 Mbps Ethernet
© 2010 by B&B Electronics. All rights reserved.
Models: ESP901, ESP902 & ESP904
Ethernet Serial Servers
ESP90x_5012ds-1/2
Virtual COM Drivers for Windows 2000, XP, Server 2003, Vista, Server 2008, & Win 7
Functional Description
Ethernet enable any serial device using B&B’s Vlinx Serial Server technology and put your serial ports to
work for you. Imagine the ability to communicate with every piece of equipment from any networked PC.
Eliminate site visits just to find a need to make a minor configuration change. Reduce service calls and
increase productivity by knowing what your equipment is doing before you get a trouble-report. Spend more
time doing the work you’re paid to do instead of chasing down nuisance problems with remotely located
equipment.
Much of today’s high-tech equipment ships with a serial port for programming, monitoring or diagnostics.
80% of these serial ports are left unconnected, often because a person travels to the port to make the
connection or a permanent PC is not desirable. With B&B’s Vlinx Serial Servers, you can put all of those
ports to work for you. Simply connect the Vlinx server to the equipment’s serial port, and connect the Vlinx
Ethernet port to your LAN. Your equipment is now online. It will appear as a local COM port on any
networked PC running our Virtual Serial Port software. No software customization required, just run the
appropriate software for your equipment.
The ESP90x family integrate the benefits of Ethernet communications with existing serial devices by
offering the combination of three serial interfaces, RS-232, RS-422, and RS-485. The Ethernet connection
will auto select 10BaseT or 100BaseTX.
These serial servers provide Windows host control over serial devices located virtually anywhere on a
TCP/IP or UDP/IP Ethernet connection. They even give authorized users control over the connected serial
device and the server configuration from anywhere outside the LAN.
Ordering Information
ESP90x_5012ds-2/2
35mm DIN Rail Mounting Kit
RS-232 (DTE), RS-422, RS-485 (2/4-Wire)
10/100 Mbps Auto-detecting 10BaseT or
TCP, IP, ARP, DHCP, Telnet, HTTP, UDP
110 to 230.4 kbps, 5787 bps
None, Even, Odd, Mark, Space
RS-232 w/ VT100 Emulation
HyperTerminal w/VT100 Emulation
Compatible with Windows 2000, XP (32/64 bit)
Note: Refer to the manual for pin-outs and signals.
Server 2003 (32/64 bit), Vista (32/64 bit),
Server 2008 (32/64 bit), Win 7 (32/64 bit)
*ESP902 has (1) RS-232/422/485 port and (1) RS-232 port
Power (Power Supply Included)
-14 to 176 F (-10 to 80 C)
-4 to 185 F (-20 to 85 C)
2.5 mm Jack (Positive Tip)
3.4 x 4.5 x 0.90 in (8.5 x 11.5 x 2.3 cm)
3.4 x 4.5 x 0.90 in (8.5 x 11.5 x 2.3 cm)
4.5 x 7.3 x 1.1 in (11.4 x 18.5 x 2.9 cm)
© 2010 by B&B Electronics. All rights reserved.
Operation
A detailed operating manual is contained on the CD ROM which ships with the product.
Vlinx ESP Manager allows easy access to the serial server to configure the server and ports, upgrade
server firmware and monitor port status and activity. When ESP Manager opens it will search for and
display all ESP90x serial servers on the network. The Monitor Port feature allows you to use any PC on
the LAN/WAN to actively view and troubleshoot the communications status. It shows when there is a
client connection to the server and the client IP address. It displays the number of bytes transmitted and
received as well as the status of the hardware handshaking lines
ESP901/ESP902/ESP904 serial servers can be accessed and configured from any web browser (such
as Internet Explorer) on the LAN/WAN. This allows you to remotely manage the software and your
serial device. It also allows off-site troubleshooting.
ESP901/ESP902/ESP904 serial servers provide automatic resumption of the TCP data connection in
case of a power failure or loss of an Ethernet connection on either the client or server. Once the
Heartbeat connection is established the server sends a signal to the client every five seconds. If the
signal is not received, the serial server will attempt to reconnect the TCP data connection every five
seconds until communication is established again.