363-206-305
Power
Issue 3 June 2000
4-9
Wall Distant Terminal Powering
4
The DDM-2000 FiberReach Multiplexer Wall Distant Terminal (Wall DT) uses bulk
power converters to support powering from 120 V AC. This converter supplies
–48 V to the FiberReach shelf. Customer premise locations usually have 60 V AC
or 120 V AC commercial power from utilities. These powering options provide
battery backup for up to 8 hours. Figure 4-7 illustrates an example of powering
with a power supply for the wideband shelf and another power supply for the
narrowband shelf. Figure 4-4 illustrates an example of powering with a single
power supply for both the wideband shelf and the narrowband shelf.
.
Figure 4-7. Wall DT Powering (Power Supply for WB and Power Supply for NB)
120V AC
POWER CORD
120 V AC
PSU
A
B
120V AC
POWER CORD
A
CHARGING/
ALARM
CHARGING/
ALARM
120 V AC
PSU
MISC
DISCR
WIDEBAND
SHELF
TO CUSTOMER
-48 V
NARROWBOAND
SHELF
FRAME GROUND
MISC
DISCR
FRAME GROUND
MISC
DISCR
(OPTIONAL)
FRAME
GROUND
FRAME
GROUND
ALARM
-48 V
ON WBS. OPTIONALLY IT CAN BE CONNECTED TO A "Y" CABLE THAT
HAS A BRANCH THAT FACILITATES PICK-UP OF ADDITIONAL DISCRETE
ALARM INPUTS.
* ALARM CABLE CAN DIRECTLY ATTACH TO THE MISC DISCRETE CONNECTOR
INTERFACES WITH THE MISC DISCR CONNECTOR ON THE WBS AND
8AH
BATTERY
8AH
BATTERY
B
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