OAS alarm and Control Circuits 6-17
DMS-100 Family Alarm System Description Reference Manual BASE12
Remote site alarms
A remote site can have alarm capability with the use of scan and signal
distribution cards. An ACD panel with common audible (CA) alarm is also
at the remote site. When an alarm condition occurs, a scan point detects the
condition. The alarm information transmits to the host office through the
DS-1 facility. The host office operates the appropriate signal distribution
point. This action causes activation of the alarm signaling device at the host
site. Signal distribution cards at the remote site control the ACD panel
operation. For this reason, the AAR switch on the ACD panel at the remote
site does not function. To silence the CA alarm, you must activate the alarm
disable (DA) circuit and then manually reset when you require audible alarm
indications again
RLM alarm extension circuit
In NT0X45-type RLM offices, the alarm extension circuit NT5X92 can
expand the audible and visual alarm abilities beyond those normally
available from the ACD panel with common audible (NT0X63AC). For
more information, refer to Figure 6-2).
This alarm extension circuit provides the common audible alarm at a
maximum of ten different locations in the same building. The alarm
extension circuit extends alarm signals through relay contacts on the
following:
• a maximum of five exit alarm panels (NT0X64)
• a total of two ACD panels (NT0X63)
• two other non-DMS systems
Activation of all these alarms occurs through signal distribution points. The
alarm system logic defines these points or these points are assigned for each
office and depend on data tables.
The alarm extension circuit contains one alarm extension unit (NT5X92AB)
installed on a remote service equipment frame and a maximum of ten
common audible alarm panels (NT5X92AA). These wall- or
column-mounted panels are at locations that require audible alarm
indications.
The NT2X57 signal distribution card replaces and performs the functions of
the following circuits:
• DMS-100 alarm indication applique circuit (NT5X59AA, NT5X59AB)
• audible and visual alarms extension circuit (NT5X85AA)
• alarm extension circuit (NT5X92AB, NT5X92AD)
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