Westermo LD-02 - Handbuch (Seite 9)

9 6156-2002
Switch settings
The operating parameters can be set via dip switches located under the lid on top of
the plastic case.
WARNING! DO NOT OPEN CONNECTED UNIT
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Description LD-02
The LD-02 is primarily designed to be used as a line splitter but it can also be used as
an interface converter between Westermo’s 10 mA balanced current loop (W1) and
RS-232 or RS-422/485.
The LD-02 line splitter has four channels where channel no 1 is RS-232, channel 2 and 3
are W1 and Channel 4 is RS-422/485. Each LD-02 will in addition to splitting the W1 in
RS-232 or RS-422/485 amplify the W1 signal (repeater function) allowing a multidrop
network with a maximum of 14 LD-02’s in series.
The LD-02 offers total galvanic isolation between the interfaces.
The RS-232 and RS-422/485 interfaces are connected in parallel meaning they can’t be
used simultaneously.
The LD-02 is typically used to extend the RS-422/485 in a multidrop network.
At 9 600 bit/s a maximum distance of 2 500 m can be acheired between each LD-02.