Key Features

  • Complete LonWorks® transformer-isolated, free topology communication transceiver
  • Replacement for the FTT-10 transceiver1
  • Compatible with the FTT-10 Free Topology Transceiver and LPT-10 Link Power Transceiver; Differential Manchester coded signaling for polarity insensitive network wiring 78 kilobits per second bit rate up to distances of 500 meters (free topology), or 2700 meters (doubly terminated bus) worst case
  • Supports free topology star, bus, and loop wiring
  • Automatic clock detection at 5, 10, or 20MHz
  • Designed to comply with FCC and EN55022 Level B EMI requirements
  • UL, CSA, TÜV Recognized component
  • LonMark® certifiable for interoperability

Tech Specs

Function Free topology

link power twisted pair transceiver with ntegral +5VDC power convertor

Data Communications Type

Differential Manchester coding

Network Voltage

42.4VDC supplied by LPI-10 Link Power Interface Module. Nominal 48VDC input to LPI-10 Interface provided by customer’s power supply

Application Current Output at Node

100mA @ 5VDC ± 10%


Designed to comply with FCC Part 15 Level B, EN55022 Level B, and CISPR 22 Level B


Designed to comply with EN 61000-4-2, Level 4

Radiated Electromagnetic Susceptibility

Designed to comply with EN 61000-4-3, Level 3

Fast Transient/Burst Immunity

Designed to comply with EN 61000-4-4, Level 4 (network cable only)

Surge Immunity

Designed to comply with EN 61000-4-5, Level 3

Conducted RF Immunity

to comply with EN 61000-4-6, Level 3


Recognized by UL to Standards UL 60950, 2000 and CSA C22.2 No. 60950, 2000

Recognized by TÜV EN 60950

Clock Rates

20, 10, 5, or 32.5 MHz input clock. Clock supplied by Neuron Chip and automatically configured by the LPT-11

Transmission Speed

78 kilobits per second

Maximum LPT-11 Devices Per Segment

128 with LPT-11 output of 5VDC @ 25mA

64 with LPT-11 output of 5VDC @ 50mA

32 with LPT-11 output of 5VDC @ 100mA

Network Cabling

See User’s Guide for compatible cables

Network Length in Free Topology

1000m (3,280 feet) maximum total wire with one repeater

500m (1,640 feet) maximum total wire with no repeaters

500m (1,640 feet) maximum node-to-node distance

Network Length in Doubly-Terminated Bus Topology

5400m (17,710 feet) with one repeater

2700m (8,850 feet) with no repeaters

Network Bus Polarity

Polarity insensitive

Power-down Network Protection

High impedance when unpowered

Connector Thru-hole pins

(1.8mm spacing)

Network Terminator

Termination in LPI-10 Link Power Interface Module

Operating Temperature

-40 to +85°C

Non-operating Temperature

-40 to +85°C

Operating Humidity (non-condensing)

25-90% RH @ 70°C

Non-operating Humidity (non-condensing)

95% RH @ +70°C

FTT-10A Free Topology Twisted Pair Tranceiver Datasheet



IzoT Hands-on Lab

The shortest path from your ideas to real IIoT products.

Start Developing

IIoT Requirements

Learn how the IzoT Platform addresses requirements for the Industrial IoT.

Download Whitepaper