
Serial-to-Ethernet Device Servers
Lantronix UDS1100-IAP Industrial Modbus Serial Device Server
A single-port, metal-cased serial-to-Ethernet device server with built-in Modbus TCP, RTU and ASCII support, rated -40°C to 70°C for connecting PLCs, drives and instruments on the factory floor.
From $251.92
Overview
About the Lantronix UDS1100-IAP
The UDS1100-IAP (also written UDS 1100 IAP) is the industrial automation version of the Lantronix UDS1100 external device server. It connects one RS232, RS422 or RS485 device to a 10/100 Ethernet network so HMI, SCADA and PC-based control software can reach it, typically through an OPC server on Windows. Built-in Modbus TCP, RTU and ASCII support lets Modbus serial equipment join a Modbus TCP network without changing the attached device.
The software-selectable serial port uses a DB25F DCE connector at 300 baud to 230 Kbaud, with 2- and 4-wire RS485 support and 15 kV ESD protection. Serial tunneling carries data over Ethernet in two ways: Com Port Redirector presents the unit as a local COM port to Windows applications, or two UDS1100-IAP units can be paired to create a virtual serial cable across a facility. Modem emulation mode accepts AT commands so dial-up modem links can be replaced with network connections.
Power is 9-30 VDC or 9-24 VAC on the barrel connector, or 9-30 VDC through the DB25 port, at 1.5 W maximum, with 600 W transient protection. The IP30 metal enclosure has integrated wall mounts and operates from -40°C to 70°C. Configuration is via DeviceInstaller, web browser, Telnet, serial login or SNMP.
Key capabilities
- Modbus TCP, RTU, ASCII
- Built-in Modbus protocol support bridges serial Modbus RTU and ASCII devices to Modbus TCP hosts, documented in a dedicated Modbus user guide.
- -40°C to 70°C rated
- Industrial operating range in a 9.0 x 6.4 x 2.3 cm IP30 metal enclosure with integrated wall mounts and optional 35 mm DIN rail mount.
- RS232, RS422 or RS485
- Software-selectable interface on one DB25F DCE port, including 2- and 4-wire RS485, at up to 230 Kbaud.
- Flexible low-voltage power
- 9-30 VDC or 9-24 VAC on the barrel jack, or 9-30 VDC on the serial connector, drawing 1.5 W maximum.
- Serial tunneling
- Pair two units to create a virtual serial link over the network, or use Com Port Redirector for Windows applications.
- Modem replacement
- In modem emulation mode the unit accepts AT commands on the serial port and opens a network connection instead, retiring dedicated modems and phone lines.
How to choose the right UDS1100-IAP part number
UD1100IA2-01 is the complete kit: the UDS1100-IAP, a 100-240 VAC international power supply with regional adapters, the ACC-500-163-R DB25M to DB9F serial cable and the ACDIN1001-01 DIN rail mount. For RS485 wiring and field power, add the ACC-500-171-R adapter, which breaks the DB25 out to screw terminals for RS485 and a 9-30 VDC input. ACC-520-0182-00 is a spare 12 VDC 10 W wall-cube supply with four AC plugs.
Configure & order
Find your UDS1100-IAP part number
Every orderable UDS1100-IAP configuration, filtered by the specs that actually differ between them. Pick what you need on the left and the matching part numbers appear here.

UD1100IA2-01
$251.92
12 in stock
Complete the deployment
Accessories, renewals & add-ons
Everything sold for the UDS1100-IAP, organized by what it does — power, cables & adapters, mounting & enclosures— 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
Mounting & enclosures
1 item
Optional DIN-rail mount
ACDIN1001-01
Optional DIN-rail mount kit for compatible Lantronix external device servers.
$25.05
Ships on backorder
Compatibility taken from the Lantronix part-number tables for the UDS1100-IAP. Don't see what you need? Request a quote — we can source the full Lantronix catalog.
Where the UDS1100-IAP is used
- Bringing Modbus RTU PLCs and drives onto Modbus TCP
- OPC-based SCADA access to serial instruments
- Replacing dial-up modem links to remote equipment
- Point-to-point serial tunneling between plant buildings
UDS1100-IAP FAQ
What is the difference between the UDS1100-IAP and the UDS2100?
The UDS1100-IAP is a single-port industrial device server with Modbus TCP, RTU and ASCII support and a -40°C to 70°C rating. The UDS2100 has two serial ports and is rated 0°C to 60°C.
Which serial interfaces does the UDS1100-IAP support?
RS232, RS422 and RS485 (2- and 4-wire), selected in software, on a single DB25F DCE connector. Baud rates range from 300 to 230 Kbaud. Data uses 7 or 8 bits with odd, even or no parity.
How is the UDS1100-IAP powered?
9-30 VDC or 9-24 VAC on the barrel connector, or 9-30 VDC through the DB25 serial interface. Maximum consumption is 1.5 W. UD1100IA2-01 includes an international AC power supply.
Does the UDS1100-IAP mount on a DIN rail?
Yes. The metal enclosure has integrated wall mounts, and the ACDIN1001-01 35 mm DIN rail mount is included with UD1100IA2-01. The enclosure also has integrated wall mounts.
What is included with UD1100IA2-01?
The UDS1100-IAP device server, a 100-240 VAC international power supply with regional adapters, the 500-163 DB25M to DB9F cable and the ACDIN1001-01 DIN rail mount.



