LTM-10A Flash Control Module and Motherboard
Models 65100-200, 65100R-200, 65120, and 65120R
t 64Kbyte flash memory provides non-volatile application
memory that can be reprogrammed in the field
t 32Kbyte RAM provides protocol buffer space for
applications that receive large bursts of network traffic
t Four memory maps allow the developer to maximize
flash or RAM space, or to use RAM for debugging applications
t Built-in Microprocessor Interface Program (MIP)
t 10MHz input clock
t Modular connectors allow modules to be exchanged
without soldering
t Supports most standard LONWORKS transceivers
The LTM-10A Flash Control Module provides a simple,
cost-effective method of adding LONWORKS technology to
any control system. The module consists of a miniature circuit
card containing a Neuron 3150 Chip, re-programmable
64Kbyte flash memory, 32Kbyte RAM, 10MHz crystal
oscillator, and connectors for power, application I/O or
host interface, and a transceiver.
The LTM-10A module includes standard Neuron Chip
firmware with extensions for automatic configuration of
transceiver parameters, output of a packet transmitted signal,
manual device recovery, and a Microprocessor Interface
Program (MIP) that can be used to convert the LTM-10A
to a LONWORKS network interface.
Models 65100R-200 and 65120R are compliant with the
European Directive 2002/95/EC on the restriction of the use
of certain hazardous substances (RoHS) in electrical and
electronic equipment.
The LTM-10A firmware comes pre-configured with many
common LONWORKS transceiver parameters. Five transceiver
identification (ID) pins on the LTM-10A module select the
appropriate transceiver type.
The packet send output uses an additional output pin
provided by the LTM-10A hardware to provide an indication
of LTM-10A network activity. This output is asserted low for
approximately 40ms when a packet is sent from the network
processor to the MAC processor on the LTM-10A module’s
Neuron Chip.
Logic on the LTM-10A module provides two additional bit
outputs. One of these outputs is used as a packet send indicator
by the LTM-10A firmware; the other can be used either as a
general purpose bit output or as an up-link data interrupt
request when using the LTM-10A MIP.
The manual device recovery feature provides a means to
recover a device that has been loaded with a defective application that renders it inoperable. The manual device recovery
features allows such a device to be recovered by activating the
service input prior to activating the reset input, then continuing
to activate the service input after releasing the reset input.
After approximately 10 seconds, the device will become
application-less, allowing a network management tool to
reload a new application.
The re-programmable flash memory makes the LTM-10A
module ideal for controlling devices that may be upgraded or
modified after installation, e.g., complex sensors, motor controllers, or user interfaces.
The integral MIP firmware allows the module to be used as
an applications processor or as a network interface for another
host processor. Any host with memory-mapped I/O or an 8-bit
parallel data bus with 3 control lines and an optional up-link
interrupt may be used. The MIP allows the host to receive
asynchronous updates from up to 4096 network variable
connections, each consisting of an unlimited number of network variables; as with any node, there are no limitations on
the number of network variables that can be written or polled.
The optional up-link interrupt eliminates the need for polling
by the host for incoming data and thereby reduces delays.
Specifications for the network driver are included in the
Microprocessor Interface Program (MIP) User’s Guide.
A sample host application and source code for a network
driver for DOS (or the basis for a network driver for any
host) is available on Echelon’s Web site at
The LTM-10A module form factor is a superset of the
55000 series of LONWORKS control modules. This simplifies
the use of control modules with integrated transceivers when
the LTM-10A module’s features are not required.
The LTM-10 motherboard allows a designer to rapidly
develop a LONWORKS device. The motherboard accepts an
LTM-10A module and any LONWORKS SMX™ transceiver.
The LTM-10 motherboard also provides a service LED and
switch, a reset LED and switch, and an LED and switch for use
by the application. A connector is provided that enables the
Neuron Chip’s I/O pins to be interfaced to external I/O or a
host processor. The motherboard requires either unregulated +9
to +12VDC power or +5VDC regulated power.
Using the LTM-10A module can save hundreds of hours of
development time compared with designing custom modules.
The LTM-10 module is designed to comply with both FCC and
VDE Level B requirements, minimizing time-consuming and
expensive laboratory testing, component selection, and layout
redesign work.
Echelon offers a comprehensive range of development
tools, network interfaces, routers, and network services tools to
simplify the task of designing and commissioning products
using the LTM-10A module.
LTM-10A Module Specifications
Processor Input Clock
Operating Input Voltage
Operating Input Current
100mA typical
Non-operating (12 hour)
Humidity (non-condensing)
Non-operating (12 hour)
Neuron 3150 Chip
10 MHz
+5VDC ±5%
160mA max (see user’s guide)
0 to +70°C (standard)
-40 to +85°C (contact Echelon)
-45 to +85°C
10 to 95%RH @70°C (standard)
10 to 95%RH @85°C (contact Echelon)
95%RH max @85°C
61mm x 51mm x 13mm
(2.4″ x 2.0″ x 0.5″)
EMI Compliance
Network Interface Commands
Designed to comply with Part 15 Level B
Designed to comply with 0871 Level B
Send Message
Local Network Mgmt Command
Flush and Flush Cancel
Online and Offline
Source Quench and Resume
Network Interface Responses
Incoming Message
Incoming Response
Completion Event
Flush Complete
Network Driver Commands
Open Network Interface
Read and Write Buffer
I/O Control
Register Callback Function
Close Network Interface
Network Interface Library Functions Initialize Network Interface
Reset Network Interface
Send LonTalk Message and Wait for Completion
Get Next Response
Receive LonTalk Message
Send LonTalk Response
Local Network Mgmt Command
Handle Error
LTM-10 Motherboard Specifications
Operating Input Voltage
Non-operating (12 hour)
Humidity (non-condensing)
Non-operating (12 hour)
+9 to 15VDC
(+15VDC for PLT-30 transceiver)
0 to +70°C
-45 to +85°C
10 to 95%RH @70°C
95%RH max @85°C
191mm x 109mm x 20mm
(7.5″ x 4.3″ x 0.8″)
Motherboard Connector Suppliers
J3 Primary Power Plug:
2.1mm inside diameter
5.5mm outside diameter
J4 Alternate Primary Power Plug:
4-pin Molex
J5 I/O connector:
20-pin (2 x 10)
Part Number
LZR Electronics
Part Number
Module Socket Suppliers
P1: 26-pin (2 x 13)
P2: 6-pin (1 x 6)
Documentation is not included with the LTM-10A module, but can be downloaded from www.echelon.com/support. The LTM-10A
User’s Guide is included with the NodeBuilder® Development Tool.
LONWORKS Host Application Programmer’s Guide
LTM-10A User’s Guide
Echelon Part Number
Ordering Information
A power supply is required for the LTM-10 motherboard. Wall-mount power supplies suitable for use with twisted pair transceivers
are available from Echelon.
LTM-10A Flash Control Module
LTM-10 Motherboard
U.S. Power Supply
Continental Europe Power Supply
U.K. Power Supply
Japan Power Supply
Echelon Model Number
65100-200, 65100R-200 (RoHS-compliant)
65120, 65120R (RoHS-compliant)
78010, 78010R (RoHS-compliant)
78020, 78020R (RoHS-compliant)
78030, 78030R (RoHS-compliant)
78040, 78040R (RoHS-compliant)
Copyright © 2001-2007, Echelon Corporation. Echelon, LON, LONWORKS, LONMARK, LonBuilder, NodeBuilder, LonManager, LonTalk, LonUsers, LonPoint, Digital Home, Neuron, 3120, 3150, LNS, i.LON, LONWORLD,
ShortStack, Panoramix, Panoramix Powered by Echelon, LonMaker, the Echelon logo, and the LonUsers logo are trademarks of Echelon Corporation registered in the United States and other countries. Pyxos,
LonLink, LonResponse, LonSupport, LONews, Open Systems Alliance, OpenLDV, LonBridge, Powered by Echelon, LNS Powered by Echelon, LONWORKS Powered by Echelon, Networked Energy Services Powered
by Echelon, NES Powered by Echelon, and Thinking Inside the Box are trademarks of Echelon Corporation. Other trademarks belong to their respective holders.
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
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