User Manual

OPTICAL MASTER UNIT
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd 13
block light.
Fortunately, it is very easy to clean the connector.
Be sure to use the correct procedure for the given connector. When
disconnected, cap the SC/APC connector to keep it clean and prevent
scratching the tip of the ferrule.
Alternative 1
Swipe the tip of the ferule 2-3
times with a cotton swab soaked
in alcohol. Let it air dry.
Alternative 2
Use a product specially designed
for the purpose.
2.4.3 Connections for Cascaded OMU Units
Cascade
connection of
OMUs
If several OMUs are to be cascaded, the links between the OMUs are
managed via the Rack Communication Boards in each unit.
The connections are made via straight Ethernet cables with RJ45
connectors. These cables can be provided by Axell Wireless in
configurations where they are needed.
Link pattern for cascaded OMUs. OMU 1 and OMU 3 is on “bus “0 and OMU 2
and OMU 4 in on” bus 1”.
2.4.4 External Alarm and Relay Connections
Four external alarm sources can be connected to the External Alarm and Battery Module via the
patch panels. These sources must generate a voltage between 12 and 24VDC. The presence or
absence of this voltage will trigger the alarm depending on how the alarm thresholds have been
configured. The module can also supply +15V to external alarm sources. The maximum allowed load
on this supply is 100mA.
OMU 2
OMU 3
OMU 4
OMU 1
IN
OUT 1
OUT 2
IN
OUT 1
OUT 2
IN
OUT 1
OUT 2
IN
OUT 1
OUT 2