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U70 PL-20 USB Network Interface

U70 PL-20 USB Network Interface

USB interface for LON PL networks for any edge server, gateway, controller or device, including SmartServer™ IoT

The U70 PL-20 USB Network Interface expansion module enables a SmartServer IoT or other controller or computer to communicate with LON PL-20 and LON/IP PL-20 power line carrier networks via USB. The compact module is housed in a DIN 43880 7TE compliant enclosure. The U70 is compatible with OpenLDV 5 (or newer) and with hosts implementing the LON/IP stack, which provides source code for LON/IP and LON-compatible protocol stacks. The U70 facilitates communication to everyday devices like pumps, motors, valves, sensors, actuators and lights for lighting controls, building automation, energy management, transportation systems control and telecommunications equipment management. Tx and Rx LEDs provide an indication of LON packet transmission and reception. An on-board Connect LED provides a visual indication of device status during discovery and device configuration; status is also communicated to the host via the USB interface. 

Features and Benefits

Includes integrated 3-phase power line coupler and 24VDC power supply

Powered by power line mains voltage

Compatible with IzoT™ Net Server, OpenLNS™ Server, LNS™ Server and OpenLDV applications

Works with IzoT Net and LNS compatible applications such as the IzoT Commissioning Tool and LonMaker Integration Tool

Compatible with SmartServer IoT

Source code available as a download for a Linux-compatible driver


Hardware and electrical specifications

Dialog PL Smart Transceiver Processor

1 MB flash memory


USB Micro-B 2.0, compatible with USB 1.1 and high-speed USB systems, peripherals and cables

USB cable with Mirco-B USB to Type A USB connectors included

Mains interface 1-3 phase AC

Input voltage 100-277VAC +/- 10%, 50-60Hz +/-5% (AC mains power input, single phase used for power; up to three phases used for communication)

Input power 2.5W no-load max (for Vin ≤ 120VAC) 35W max

Output voltage 24VDC +/- 5%

Output current 350mA max


  • LON Tx/Rx LEDs
  • Connect LED
  • Power LED

Operating temperature -40°C to +70°C

Operating humidity 5-95% RH non-condensing @ 50°C

EN 61000-4-5:2006, +/- 6KV surge protection

DIN 43880 7TE mounting

Software platform

LON/IP PL-20 and LON PL-20 with a Layer 2 or Layer 5 Interface


  • Windows: OpenLDV 5 (or newer)
  • Linux: Source code available for porting

Safety and compliance

UL/IEC/CSA 62368-1


Name Date Version
U70 PL-20 USB Network Interface Datasheet (454.18 KB) 14/10/2020
Name Date Version
Brochure: Deliver the Promise of the IoT (3.42 MB)
Software Resources
Name Date Version
OpenLDV (13.05 KB)
User guides and manuals
Name Date Version
U70 PL-20 User Guide (13.05 KB)

Industrial Edge Computing and LON support are available at