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U20 USB Network Interface


Low-cost, high-performance LON interface for USB-enabled PCs

The U20 USB Network Interface connects to a PL-20 power line (ANSI/CEA-709.2) LON channel through a wall plug coupling circuit/power supply (included). The U20 interface may also be connected directly to 10.8-18VDC power lines without a coupling circuit, or to virtually any powered line with a customer-supplied coupling circuit/power supply.

It connects LNS™-enabled integration and development tools to LON networks and is ideal for industrial control, building automation, process control, home automation, and transportation applications. 

A 60cm USB extension cable is included with the U20 interface to allow for easy connection in various laptop and desktop environments. 

Features and Benefits

Low-cost USB to LON network interface facilitates integration and development

Power line (PL-20 C-Band) LON channel support

Highest possible network throughput and performance

Rugged design, removable connectors

Plug-and-play drivers for Windows XP, 2000, and Server 2003

Functions as an LNS™ High Performance Network Interface when used with LNS 3 and LNS Turbo Edition

Compatible with OpenLDV™ applications and the LonScanner™ Protocol Analyzer


Transceiver: PL-20 (ANSI/CEA-709.2 and LonMark standard channel type); EN500651.1C-Band protocol software configurable

Network connector: 2.1mm barrel connector with positive tip. Wall plug coupling circuit/power supply included. May be connected directly to 10.8-18VDC power line or to customer-supplied coupling circuit/power supply

Operating input voltage and current (U20 Interface)

  • Input voltage: 10.8-18 VDC at 2.1 mm barrel connector; powered line voltage varies with application
  • Input current: 250 mA maximum @ 18VCD

USB compatibility

  • Certified USB 2.0 compatible
  • Compatible with USB 1.1 and high-speed USB systems, peripherals and cables

LED indicators: Service (amber), Transmit (green), Receive (green)


  • Operating: 0° to +70°C
  • Non-operating: -20° to +85°C


  • Operating (non-condensing): 25 to 90% RH @ + 50°C
  • Non-operating (non-condensing): 95% RH @ +70°C

Shock and Vibration: ETSI300 019-2-3 T3.2

Dimensions: 18.2 mm H x 113.2mm L x 22.4 mm W

EMC: FCC Part 15 level B, EN55022 Class B, EN55024, CISPR 22 Class B, VCCI Class B

Agency Listings: UL 60950, cUL C22.2 60950-00, TUV EN 60950, CE, C-Tick

Name Date Version
U10/U20 USB Network Interface Datasheet (243.84 KB)
Name Date Version
Brochure: Deliver the Promise of the IoT (3.42 MB)
Software Resources
Name Date Version
OpenLDV (13.05 KB)
Name Date Version
USB Interfaces Declaration of Conformity (407.26 KB)

Industrial Edge Computing and LON support are available at