NTBWGAA
output vOutput A
+5.1
v 28 A
+8.5
V4.0 A
+lO
v 0.5 A
-lov 0.5 A
+15
v 17A
-15 v
15 A
-48V 7.7 A
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AC power system description
9
Module to Backplane Harness
The Module to Backplane Harness provides the power to the AC Power
Supplies through the backplane power connector.
AC Power Supplies
There are three different power supplies that provide power to the Peripheral
Equipment, Common Equipment and Common/Peripheral Equipment
Modules. In addition, the Ringing Generator provides ringing voltage for the
Peripheral Equipment Modules.
At each shelf, the 208/240 V ac is received through the backplane distribution
harness and converted to the necessary voltages for the individual module.
Circuit breakers are located on each MPDU to provide for safe operation and
easy maintenance.
The output voltages and currents of the power supplies are listed in Tables 3
brough 6.
fable 3
Deripheral
Equipment Power Supply
Power engineering 553-3001-l 52