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LPT-11 Link Power
Twisted Pair Transceiver
Models 50040-02 and 50040R-02
Feature
•Complete LONWORKS®free topology communication transceiver
and power supply in a miniature SIP
•Receives both network data and power on a single twisted wire pair
•Provides unmatched electrical noise isolation
•Polarity insensitive network wiring
•78 kilobits per second network bit rate for distances up to 500 meters
(free topology) and up to 2200 meters (doubly terminated bus topology)
•Supports free topology star, bus, and loop wiring
•Compatible with the FTT-10A Free Topology Transceiver, as well as the FT
3120®/FT 3150®Smart Transceivers
•Supplies 5VDC @ 100mA maximum for node power
•Meets the requirements of the LONMARK®TP/FT-10 channel type
Description
The LPT-11 Link Power Twisted Pair Transceiver provides a simple, cost-effective method of
adding a network-powered LonWorks transceiver to any Neuron® Chip-based control system.
The link power system sends power and data on a common twisted wire pair, and allows the
user to install LPT-11 transceivers with virtually no topology restrictions. Power is supplied by
a customer-furnished nominal 48VDC power supply, flows through the LPI-10 Link Power In-
terface Module where it is regulated to 42.4VDC, and then passes onto the twisted wire pair.
The LPT-11 transceiver eliminates the need to use a local power supply at each node since
node power is sent from a central power supply over the same twisted wire pair that handles
network communications.
The LPT-11 transceiver consists of a Single In-Line Package (SIP) containing a 78kbps differen-
tial Manchester coded communication transceiver, a power supply that extracts power from
the twisted pair network, and connections for the Neuron Chip Communications Port (CP)
lines and twisted pair network.
The LPT-11 transceiver supports free topology wiring, freeing the system installer from the
need to wire in a bus topology. Star, bus, and loop wiring are all supported by this architec-
ture. Free topology wiring reduces the time and expense of system installation by allowing
the wiring to be installed in the most expeditious manner. It also simplifies network expansion
by alleviating the need for the installer to follow strict rules about stub lengths.
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Should it be necessary to add more nodes
or wire runs in excess of 500 meters, link
power segments can be interconnected by
a router or a physical layer repeater.
Model 50040R-02 is compliant with the
European Directive 2002/95/EC on the re-
striction of the use of certain hazardous
substances (RoHS) in electrical and elec-
tronic equipment. The LPT-11 transceiver
includes an integral switching power supply
that requires minimal external components
to furnish +5VDC at up to 100mA. This
current is typically used to power a Neuron
Chip and application electronics, sensors,
actuators, and displays. The high current
capability of the LPT-11 transceiver elimi-
nates the need for local power supplies
at each node, resulting in equipment and
labor cost savings.
Using the LPT-11 transceiver can save thou-
sands of hours of development time com-
pared with designing a custom transceiver.
The transceiver is designed to comply with
FCC Part 15, Level B, and CISPR 22 Level
B regulations, minimizing time consuming
and expensive laboratory transceiver test-
ing. As a UL, CSA, and TÜV recognized
component, the LPT-11 transceiver can be
integrated into a product with minimal ad-
ditional safety testing. The transceiver is
small enough to fit into virtually any appli-
cation, and is economically priced for OEM
applications of any volume.
Echelon offers a comprehensive range of
development tools, network interfaces,
routers, and network services tools to sim-
plify the task of designing products using
the LPT-11 transceiver. Technical support
for the transceiver is available through
Echelon’s LonSupport™ Premier technical
assistance program.
LPT-11 System Block Diagram
LPT-11
Device
LPT-11
Device
LPT-11
Device
FT 3120 / FT 3150
Smart Transceiver
Device
LPI-10
Interface
48VDC
Power
Supply
Sensor
Actuator
+5VDC power
42.4VDC max.
To additional
LPT-11 or
FT 3120/
FT 3150
Smart
Transceiver
Devices
FT 3120 / FT 3150
Smart Transceiver
Device
Typical Wiring Topologies Supported by the LPT-11 Link Power Transceiver
Mixed
LPI-10
Star
LPI-10
Single Termination Bus/Line
LPI-10
Loop
LPI-10
Double Termination Bus/Line
LPI-10 Termination
E ECHELDI'I
EMI
Designed to comply wilh FCC Pm 15 Level B. ENSSOZZ Level B. and CISPR 22 Lexel B
ESD
Designed to comply wilh EN 61000-4-2, Level 4
Rndimed Eleclminagnelie Susceptibilily
Designed to comply wilh EN 6 000-4-3, Level 3
Fusl TrunsienliBursl Immunity
Designed to comply wilh EN 6 000-4-4, Level 4 (nelwork cable only)
Surge Immunity
Conducled RF Immunity
l
1
Designed to comply wilh EN 61000-46, Level 3
Designed to comply wilh EN 61000-4-6, Level 3
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LPT-11 Transceiver Pinout
Name Pin Number Function
NET_A 1 Connection to TP network, polarity insensitive
NET_B 2 Connection to TP network, polarity insensitive
V+ 3 Power supply input voltage
INDUCTOR 4 Power supply inductor connection
VCC 5 +5VDC power output for device operation
GND 6 Power supply ground
CLK 7 Transceiver clock input from Neuron Chip
NC 8 No Connect (not connected internally)
TXD 9 Neuron Chip CP1
RXD 10 Neuron Chip CP0
NC 11 No Connect (not connected internally)
NC 12 No Connect (not connected internally)
NC 13 No Connect (not connected internally)
NC 14 No Connect (not connected internally)
General Specifications
Function Free topology link power twisted pair transceiver with integral +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%
EMI Designed to comply with FCC Part 15 Level B, EN55022 Level B, and CISPR 22 Level B
ESD 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 Designed to comply with EN 61000-4-6, Level 3
Listings 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 1See User’s Guide for compatible cables
Network Length in Free Topology 21000m (3,280 feet) maximum total wire with one repeater
2500m (1,640 feet) maximum total wire with no repeaters
2500m (1,640 feet) maximum node-to-node distance
Network Length in Doubly Terminated 24400m (14,430 feet) with one repeater
Bus Topology 22200m (7,210 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
E ECHELDI'I
4 15
Pm Edge (0 m)
55:05
(022:002) 7 ”F
027
(0011)
(0 ”7) Side Vwew
Front View
Dimensions shown in mm
(x xxx = mch relerence omy)
5 EEHELon,
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Operating Humidity
(non-condensing) 25-90% RH @ 70°C
Non-operating Humidity
(non-condensing) 95% RH @ +70°C
Packaging Single In-line Package
Ordering Information
Product Echelon Model Number
LPT-11 Link Powered Twisted Pair Transceiver 50040-02, 50040R-02
! 078-0198-01
(order separately — not shipped with product)
!
078-0104-01
(order separately — not shipped with product)
Mechanical Dimensions
Copyright © 2003-2006, Echelon Corporation. Echelon, LON, LonWorks, LonMark, LonBuilder, NodeBuilder, LonManager, LonTalk, LonUsers, LonPoint, Digital Home, Neuron, 3120, 3150, LNS,
i.LON, LonWorld, ShortStack, Panoramix, LonMaker, the Echelon logo, and the LonUsers logo are trademarks of Echelon Corporation registered in the United States and other countries. LonLink,
LonResponse, LonSupport, LONews, Open Systems Alliance, OpenLDV, Powered by Echelon, LNS Powered by Echelon, Panoramix Powered by Echelon, LonWorks Powered by Echelon, Net-
worked Energy Services Powered by Echelon, NES Powered by Echelon, Digital Home Powered by Echelon, Pyxos, and Thinking Inside the Box are trademarks of Echelon Corporation. Other
trademarks belong to their respective holders.
Disclaimer
Neuron Chips, Free Topology Twisted Pair Transceiver Modules, and other OEM Products were not designed for use in equipment or systems which involve danger to human health or safety or a
risk of property damage and Echelon assumes no responsibility or liability for use of the Neuron Chips or Free Topology Twisted Pair Transceiver Modules in such applications. ECHELON MAKES
AND YOU RECEIVE NO WARRANTIES OR CONDITIONS, EXPRESS, IMPLIED, STATUTORY OR IN ANY COMMUNICATION WITH YOU, AND ECHELON SPECIFICALLY DISCLAIMS ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 003-0356-01C
Notes:
1. For compliance to the LonMark TP/FT-10 Channel, cable must comply with ANSI/TIA/EIA-568-A-1995 Category 5 requirements for 24 AWG unshielded
twisted-pair cable.
2. Network length varies depending on wire type. Level-4 wire used in examples. See LonWorks LPT-11 Link Power Transceiver User’s Guide, or Junction Box
and Wiring Guidelines for Twisted Pair LonWorks Networks, 005-0023-01 Rev. K or later, for detailed specifications.
3. Operation at 2.5MHz does not comply with LonMark guidelines for the TP/FT-10 channel. 1.25MHz operation is not supported.
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