Power Supply; Du Shelf Backplane - Northern Telecom DMS-100 Series Installation And Maintenance Manual

0
0
0
0 for modem pool
0 connections - not
0 used for standard
0 installations
0
0
0
0
0
0
0
0
0
0 Ter-
0 minal >o o o o o o o o o o o o o o o o
0 strip
0
0
0
0
0
0 DB-25 >
0 for
0 DTE
0
0
0
0
0 An RS-232C to V.35 adapter cable is required for V.35 data units
0 Note: not provisioned on NT4X25DH shelf if NT4X25DL DC to DC
0 power supply is provisioned.
0
0 Figure 3.16
0

Power Supply

0 The power supply circuit pack for the
0 two special
0 rackmount DUs.
0 an NT4X25DK AC to DC power supply, or an NT4X25DL DC to DC
0 supply. The NT4X25DK supply connects to a standard 110 V AC out-
0 let via a separate power cord which connects to the rear of the
0 power supply, for shelf usage in environments such as a
0 room. The NT4X25DL power supply operates from a standard -48V DC
0 supply, and is typically provisioned in a central office environ-
0 ment. The
0 backplane. In either case, the power supply requires
0 loading of one DU.
0 trol the power and a fuse (5A for NT4X2554 and NT4X25DK, 8A for
0
V
C1
o o o o o o o o o o o o o o o o
o o o o o o o o o o o o o o o o
o o o o o o o o o o o o o o o o
o o o o o o o o o o o o o o o o
o o o o o o o o o o o o o o o o

DU Shelf Backplane

slots on the left of the shelf and powers up to 16
The NT4X25DH shelf can be provisioned with either
NT4X25DL supply is connected via lugs on the shelf
The power supply has an ON/OFF switch to con-
data lines
50-pin telephone
connector
V
GND PC
C0
MIC 1
MI 1
R1.1
T1.1
R1
T1
rackmount
297-2121-226
VINTAGE 05.01
110 V ac
connector
(see note)
V
O O < copper
lugs
O
< -48Vdc
O lugs
shelf occupies
power
computer
a minimum
3-43