Westermo LRW-702-F2, Руководство пользователя

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6651-2271
About the Interfaces
Power
The power terminal has two independent inputs, +VA and +VB, allowing redundant
power input. The LRW-702-F2 power supply is galvanically isolated from all other
interfaces.
Optical Fibre Interfaces
LRW-702-F2 uses Small Form Factor Pluggable (SFP) transceivers. This means that a wide
range of different fibre transceivers and connectors can be used.
LONWORKS TP/FT-10 Interface
Connection terminal to a LONWORKS TP/FT-10 transceiver. TP/FT-10 is a twisted
pair communications at 78 kbps with distances to 2700 meters in a doubly terminated
bus topology. The TP/FT-10 also supports free-topology wiring to 500 meters which
eliminates the need to install an exact multi-drop arrangement. Star, home run, multi-
drop, and loop wiring, or any combination, are supported by the TP/FT-10.
Status Port
The status port connects to an internal solid state relay witch may be used to trigger an
external alarm if a fault condition occurs. During normal operation pins 1 and 2 are in
contact with each other. During an optical link failure, or power failure, pins 1 and 2 are
isolated from each other.
Optical link failures can be classified in to two categories, local or remote, as indicated
by the FL L and FL R LEDs. A local link failure is when an optical link is down at this
particular unit. A remote link failure is when an optical link is down at some other unit.
From the factory, the status port is set to trigger on both types of link failures. However,
by setting DIP-switch S2:1 to the ON position, the status port will only trigger when a
local link failure has occurred.