Installing The Rackmount Shelf Alarms - Northern Telecom DMS-100 Series Installation And Maintenance Manual

0
0
0 by experienced
0 shock, equipment damage, or service interruption.
0
0 1. Mount the
0 The shelf is a standard 44.8 cm width.
0 than 48.36 cm, use P0686254 adapter brackets included in the
0 NT4X2591 mounting hardware kit to extend
0 shelf as required.
0
0 2. Connect the frame ground bus bar to the GND terminal lug, and
0 the logic
0 See Figure 4.5 on page 4-10 for locations of the
0 nectors.
0 nections in
0 297-1001-156,
0 required.
0
0 3. Connect the -48V DC power and ground leads
0 lugs on the shelf backplane, and the other end to the appro-
0 priate power distibution center (PDC)
0 panel (FSP).
0
0 Note - if using the frame PDC as power source, the alarm bat-
0 tery supply
0 circuit breaker should be
0 -48V DC power, otherwise the circuit may not operate properly
0 and a frame fail signal will exist.
0 1138 for alarm cabling instructions, or contact
0 Technical Assistance Services (ITAS) for assistance.
0
0 4. Remove the protective safety bar from the front of the shelf.
0
0 5. Ensure that
0 the on/off switch on its faceplate to OFF), then install
0 power supply
0 faceplate retaining screw to secure it.
0
0 WARNING: Do not turn on the power supply until
0 least one
0 power supply without the minimum load of one
0 damage it.
0
0

Installing the Rackmount Shelf Alarms

0
0 The NT4X25DL
0 used to trigger shelf power failure alarms.
0 accessed via the 9 pin D-type connector located on the power sup-
0 ply. The connector pinout is as follows:
0
0 Pin 1
0
0 Pin 2
0
power cabling
shelf in the frame (rack) using machine screws.
return ground bus bar to the PC GND terminal lug.
For general reference information on power con-
a central office
Power Distribution
(ABS) alarm cabling from the respective fuse or
connected
the NT4X25DL power supply is switched off (set
in the left side of the shelf.
data unit stored in the shelf.
power supply has two relay circuits which can be
Alarm 1 - normally closed (NC)
Alarm 1 - normally open (NO)
personnel, to avoid
If the rack is
the
environment,
and Grounding Systems, as
to
or frame
before
Refer to IM925, section
These circuits
297-2121-226
VINTAGE 05.01
electrical
wider
width of the
shelf con-
refer to NTP
the labelled
supervisory
connecting the
Installation
the
Tighten the
there is at
Turning on the
data unit may
are
4-11