Echelon 14315R, Руководство пользователя

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LonWorks Router User’s Guide 3
network where the devices are subject to frequent physical relocation, or
if cable installation is difficult. For each of these cases, you use a router
to connect the dissimilar L
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channels.
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Enhance the reliability of the L
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network . The two channels that
connect to a router are logically isolated, so a failure on one channel does
not affect the other channel. For example, in an industrial control
network, isolation among connected cells might be desirable to prevent a
failure in a single cell from bringing down multiple cells. You can achieve
this goal by dedicating channels to individual cells and isolating them
from one another with routers.
• Improve overall network performance . You can use routers to isolate
traffic within subsystems. For example, in a cluster of industrial cells,
most of the communications might be between devices within cells rather
than across cells. Using intelligent routers across cells avoids forwarding
messages addressed to devices within a cell, thus increasing the capacity
and decreasing the response time of the overall network.
The use of routers across channels is transparent to the application programs
within devices. Thus, you can develop applications without needing to know the
workings of the routers or even if the device’s channel will use a router. You only
need to consider routers when determining the network image of a device. When
you move a device from one channel to another, you need only change the
network image. Use a network management tool, such as the LonMaker
Integration Tool, to manage network images.
LonWorks Router Products
Echelon provides the following router products:
• MPR-50 Multi-Port Router (Model: 42150)
Five-channel (one TP/XF-1250 channel and four TP/FT-10 channels)
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router. The MPR-50 can be used to connect two, three, or
four TP/FT-10 channels together, or it can be used to connect these
TP/FT-10 channels to a high-speed TP/XF-1250 backbone.
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i.LON 600 L
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/IP Server (Model: 7260x)
An EIA-852 compliant LonTalk-to-IP router. The i.LON 600 provides
secure Internet access to L
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devices and transforms the Internet
(or other IP-based network) into a pathway for L
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control
information.
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CRD 3000 Power Line/RF Bridge (Model: 76520R)
A Power Line (PL) to RF communications device, designed primarily for
intelligent L
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street lighting networks.
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LonPoint Router (Model: 4210x)
A two-channel router for TP/FT-10, TP/XF-78, or TP/XF-1250 L
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channels. Six models are available for various network connection
combinations.