Equipment and Cable Installation for Metropolis
®
DMXtend
Shelf Horizontal Bay Mount
Office Alarm Cable Installation
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Lucent Technologies - Proprietary
See notice on first page
365-372-327 R2.0
Issue 1, October 2003
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Office Alarm Cable Installation
Description
Office alarms are the common method used in a central office for
maintenance personnel to quickly isolate a failure. Perform this
procedure if connection to the office alarm system is required.
Important!
The office alarm relay contacts are rated at 50 VA
which means that they are capable of switching 1 amp at 50 volts,
or 2 amps at 25 volts. Their ability to switch large transient currents
means that they can, if necessary, switch up to ten 5-watt aisle pilot
lamps.
If transient voltages or currents are above these limits, transient
noise-suppressing devices such as diodes or contact protection
networks must be used to keep within the voltage and current limits. If
these protection devices are not sufficient, an external buffer relay
MUST be provided.
In all cases, and as a matter of good practice, suppression devices such
as diodes or contact protection networks must be provided across any
external relay coil being driven by the Metropolis
®
DMXtend to limit
transient voltages and currents.
Office alarm cable assemblies are listed in Table 1-24, Office Alarm
Cable Assemblies (page 1-70).
Alarm Mult
Office alarm cabling in a Metropolis
®
DMXtend bay starts at the
bottom shelf which is cabled directly to the office alarm system. Then
as shelves are added to the bay, the office alarm connection is extended
by multing the alarm cabling from shelf to shelf (bottom to top). Alarm
mults do not leave the bay.
For example, J13 of one shelf should be connected to the office alarm
terminal. J14 of the same shelf should be connected to J13 of the shelf
above shelf and the same procedure should be continued to connect
more shelves.
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Procedure
Step 1
Obtain the office alarm cable per Table 1-24, Office Alarm Cable
Assemblies (page 1-70). Connect the office alarm cable to
ALM
(
J13
)