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Product Overview
The Vista Electronics LM104-P50 module provides connectivity between PC/104-based systems
and the Echelon Local Operating Network (LON). The module features full compliance with
Echelon’s LonMark Interoperability Guidelines, greatly simplifying hardware and software
integration into systems built around LonWorks.
The MS-DOS software drivers supplied with the LM104-P50 module were developed using
Echelon’s Microprocessor Interface Program (MIP) and function in the same way as the MS-DOS
software driver supplied with the Echelon SLTA. The LM104-P50 is 100% compatible with
Echelon’s API (Application Program Interface), so any program that complies with the API will
work transparently with the LM104-P50. QNX drivers, provided by Steinhoff Automation, are also
available (please contact VISTA Electronics Sales).
The module contains one 3150-type Neuron chip, one 32K EPROM containing LON system
software, and one 32K static RAM chip (24K available) for network message buffering. It also
contains one of several network interfaces as outlined below. It interfaces with other LON nodes in
standalone, peer-to-peer or polled environments.
The LM104-P50 module (except Options 5/5C) is compliant with the PC/104 specification, version
2.3 for an 8-bit module with a 16-bit stackthrough connector. Mechanical and electrical
specifications are listed in the Appendix A.
This guide is specific to board revisions B2 and B3 for Options 1/2/3/6, and board revision C.0
for Options 5/5C.
LM104-P50 Network Interface Options
Option 1 RS-485 multi-drop configuration, 39Kbps
Option 2 Transformer-coupled twisted pair, 78Kbps
Option 3 Transformer-coupled twisted pair, 1.25Mbps
Option 5 Echelon PLT-22 Power Line Carrier, 5Kbps
Option 5C Echelon PLT-22 Power Line Carrier w/CENELEC support, 5Kbps
Option 6 Echelon FTT-10A Free Topology Transceiver, 78 Kbps
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