Table of Contents
Advertisement
The REMOTE ALARMS terminals at the back of the fuse panel provide a closed loop for
connecting cross-connect system fuse failure alarm circuitry to an external alarm system. The
alarm will be triggered upon failure of any fuse in the fuse panel. Each GMT fuse also has a
colored indicator which is displayed when the fuse is blown, and the fuse panel has an LED
indicator which lights when any fuse on the panel is blown.
3.4
Cross-Connect Jumpers
When installing cross-connect jumpers it is important that congestion be held to a minimum.
This will not only simplify installation, but will also provide optimal jumper tracing and ease of
system expansion and maintenance.
The recommended rules of jumper routing are defined in
bay system; however, the same basic rules apply for any number of bays. Cross-connect
jumpers should not exceed lengths as described earlier in this section. To prevent unnecessary
buildup and congestion, all discontinued cross-connects should be removed from the wireways.
Using cross-connect jumpers with accompanying messenger wires, cross-connect all necessary
DSX-4U circuits as shown in
1. Connect the cross-connect OUT (XO) of the first termination to the cross-connect IN (XI)
of the second termination. Connect the messenger wire pins of this cross-connect to tracer
lamp pin jacks on each termination. Messenger wire pins may be inserted in either of the
pin jacks. The two pin jacks on each module are internally connected together.
2. Connect the cross-connect IN (XI) of the first termination to the cross-connect OUT (XO)
of the second termination. Connect the messenger wire pins of this cross connect to the
remaining tracer lamp pin jack on each termination.
ADC DSX-4U cross-connect jumpers are available in various lengths from 0.3 to 8.23 m (1 to
27 feet). It is important to select the proper cable length to prevent congestion. Cross-connect
jumpers are also available with one connector factory terminated and one connector kit which is
terminated on site. This method allows jumpers to be cut to the exact length required,
eliminating excess jumper buildup.
Disconnect any discontinued cross-connect jumpers at each end and remove them from the
wireways.
BLOWN FUSE
INDICATOR
FRONT VIEW
A
1-10
NEG (-)
B
11-20
C
REMOTE ALARMS
D
1-10
POS (+)
E
11-20
F
1
2
3
4
5
6 7
8
9
10
REAR VIEW
Figure 2-7. Fuse Panel
Figure
2-9.
ADCP-80-353 • Issue 2 • August 2002 • Section 2: Installation
USE
3 AMP
FUSE
MAXIMUM
50 AMP
MAXIMUM
4
8
12
16
TOTAL BUSS
AMPERAGE
NEG (–)
BUS
– 48V
ONLY
POS (+)
GND
BUS
Figure
2-8. The figure shows a three-
© 2002, ADC Telecommunications, Inc.
2389-B
Page 2-9
Advertisement
Table of Contents
