Echelon LonWorks Router - Manual (Page 16)

L ON W ORKS transceivers, including standard transceivers for free topology, link
power, twisted pair, and power line. Using multiple communications media can
minimize installation costs and increase system performance by allowing easily
installed media, such as power line or link power, to be combined with high-
performance media such as TP/XF-1250 twisted pair.
Router 5000 and FT Router 5000 Overview
The Router 5000 chip and the FT Router 5000 chip (generically referred to as
Series 5000 router chips) are Echelon semiconductor products, based on the
Echelon Neuron 5000 Core, that are used to build half-routers and full routers for
L ON W ORKS channels. A L ON W ORKS router connects two communications
channels and route LonTalk messages between them. They support installation
of networks with dozens to thousands of devices.
Both the Router 5000 and FT Router 5000 include the Router firmware required
to implement a half-router. Each chip’s compact form factor minimizes the space
required to develop a half-router. You can implement two half-routers to develop
a full router for the same, or different, external transceiver types.
The FT Router 5000 integrates the high performance Neuron 5000 Core with a
free topology (FT) twisted pair transceiver. Thus, the FT Router 5000 supports
the L ON W ORKS TP/FT-10 channel type.
Table 1 lists commonly used channel and transceiver types for Router 5000-
based router halves; see Developing a Router with the Router 5000 Chip for
additional information about connecting a Router 5000 chip to these external
transceiver types. These external transceivers can run at interface bit rates from
9.8 kbps to 1.25 Mbps.
Table 1. Common Channel and Transceiver Types for a Router 5000
Channel Type Transceiver for Half Router Notes
TP/FT-10 Echelon FTT-10A Free Topology
Transceiver (Model 50051)
Connection to the Router 5000 is
similar to the connection to a
Neuron Chip.
Use an FT Router 5000 for a
standard (non-link-powered)
TP/FT-10 channel or for a locally
powered device on a link-power
TP/FT-10 channel.
TP-RS485 Any EIA-485 transceiver Can use any standard 3.3V or 5V
EIA-485 transceiver.
TP/XF-78 Echelon TPT Twisted Pair
Transceiver Module (Model 50010)
Add differential driver and
differential comparator circuits
(contact Echelon Support).
TP/XF-1250 Echelon TPT Twisted Pair
Transceiver Module (Model 50020)
Add differential driver and
differential comparator circuits.
6 Introduction to LONWORKS Routers