
Serial-to-Ethernet Device Servers
Lantronix UDS1100-B Serial-to-Ethernet Device Server Board
The UDS1100-B is a board-level serial-to-Ethernet device server that OEMs build into equipment to put an RS-232, RS-422 or RS-485 device on a 10/100 Ethernet network for remote access, monitoring and control.
From $116.54
Overview
About the Lantronix UDS1100-B
The UDS1100-B (also written UDS 1100 or UDS1100B) network-enables equipment that only has a serial interface, such as factory machinery, security systems, HVAC and lighting controls and point-of-sale devices. It is designed to be integrated with the host product's circuit board, so OEMs add networking without developing their own TCP/IP stack. Lantronix lists the UDS1100-B as NRFND, not recommended for new designs, and the product page names no replacement.
A single DB25 female DCE port supports software-selectable RS-232, RS-422 or 2- and 4-wire RS-485 at 300 baud to 230 Kbaud, with 15 kV ESD protection on the transceivers. The 10/100 RJ-45 Ethernet port has 1500 VAC isolation. Power is 9 to 30 VDC or 9 to 24 VAC on a barrel connector, or 9 to 30 VDC through the DB25, at 1.5 W maximum, and the board operates from -40 to 70 C.
Serial tunneling encapsulates serial data in Ethernet packets, linking two device servers across a facility or around the world, or reaching Windows applications through Lantronix COM Port Redirector. Modem emulation accepts AT commands to replace dial-up modems. Setup uses the built-in web server, Telnet, the serial port or DeviceInstaller, and 2 MB of flash stores firmware and custom web pages.
Key capabilities
- RS-232, RS-422 or RS-485
- One DB25F DCE port is software-selectable between RS-232, RS-422 and 2- or 4-wire RS-485 at data rates from 300 baud to 230 Kbaud.
- Wide-temperature operation
- The board operates from -40 to 70 C and stores from -40 to 85 C, suiting equipment installed in unconditioned spaces.
- Transient and ESD protection
- Serial transceivers carry 15 kV ESD protection, the power input withstands 600 W transient pulses and the Ethernet port has 1500 VAC isolation.
- Dial-up modem replacement
- In modem emulation mode the UDS1100-B accepts AT commands and opens a network connection instead, removing dedicated modems and phone lines.
- Virtual COM port support
- COM Port Redirector lets Windows applications written for a local serial port talk to the networked device as if it were attached locally.
How to choose the right UDS1100-B part number
UD110000B-01 is the only device server part number: the UDS1100 board only, with a 10/100 RJ-45 port and one DB25F DCE RS-232/422/485 port. The other listed parts complete an installation. ACC-520-0182-00 is a 12 VDC, 10 W wall-cube power supply with four AC plugs. ACC-500-171-R adapts the DB25M side to RS-485 and a 9 to 30 VDC power input on screw terminals, useful for field wiring. ACC-500-163-R is a DB25M to DB9F serial cable for devices with DB9 ports.
Configure & order
Find your UDS1100-B part number
Every orderable UDS1100-B configuration, filtered by the specs that actually differ between them. Pick what you need on the left and the matching part numbers appear here.

UD110000B-01
$116.54
Ships on backorder
Complete the deployment
Accessories, renewals & add-ons
Everything sold for the UDS1100-B, organized by what it does — power, cables & adapters— each with why you'd add it.
Power
1 itemPower Supply
ACC-520-0182-00
External wall cube power supply with 12 V DC output and 10 W output power. It includes 4 AC plugs and is listed for compatible Lantronix device server products.
$60.70
14 in stock
Cables & adapters
2 items
cable
ACC-500-163-R
6 ft DB25M to DB9F serial cable for compatible Lantronix device server products.
$21.72
Ships on backorder

power input screw terminal adapter
ACC-500-171-R
DB25M to RS-485 screw terminal adapter with 9-30 VDC power input. It is listed as a compatible accessory for select Lantronix device servers.
$96.63
2 in stock
Compatibility taken from the Lantronix part-number tables for the UDS1100-B. Don't see what you need? Request a quote — we can source the full Lantronix catalog.
Where the UDS1100-B is used
- Networking serial controllers on factory machinery
- Remote access to HVAC and lighting control systems
- Replacing dial-up modems on legacy serial equipment
- Connecting point-of-sale and security system devices to Ethernet
UDS1100-B datasheets & documentation
UDS1100-B FAQ
Is the Lantronix UDS1100-B still recommended for new designs?
No. Lantronix lists the UDS1100-B as NRFND, not recommended for new designs. The board remains listed for existing products, and the product page does not name a replacement model.
Which serial standards does the UDS1100-B support?
The DB25F DCE port is software-selectable between RS-232, RS-422 and RS-485 in 2-wire or 4-wire mode. It supports 7 or 8 data bits, odd, even or no parity, 1 or 2 stop bits, and RTS/CTS or XON/XOFF flow control.
How is the UDS1100-B powered?
It accepts 9 to 30 VDC or 9 to 24 VAC on a barrel connector, or 9 to 30 VDC on the DB25F serial interface, and draws 1.5 W maximum. The ACC-520-0182-00 12 VDC wall cube and ACC-500-171-R screw-terminal adapter are listed as accessories.
How do I configure the UDS1100-B?
It can be configured locally through its serial port, or remotely using Telnet or a web browser through the internal web server. Lantronix DeviceInstaller discovers units, assigns IP addresses, loads custom web pages and upgrades firmware. SNMP is also supported.



