Notifier AIM-200, Руководство пользователя, Страница: 52 / 60

52 Document 15949 Rev. E 4/12/95 P/N 15949:E
Alarm Bus - The alarm bus is implemented with a two wire daisy chain that connects to
each AIM-200. It is used to provide a manual evacuation control of CMX-2 modules and to
manually silence these modules; for general alarm control functions, and to provide a backup
connection between multiple AIM-200s so that the panel may still function in general alarm
even if the CPU fails.
General Alarm Service - CMX-2 modules will be activated under a general alarm condi-
tion provided that the module address is set to “59” or below and the module is not mapped
to any zone. In addition, the alarm bus cable must be connected between the CPU and the
AIM-200 (see Figure 3-3). This connection puts the normally open contacts of the CPU
Alarm Relay across the pin connector on the AIM-200. When an alarm occurs, the alarm
relay changes state, closing the connection to the AIM-200 and signaling a general alarm
condition.
Note: The CPU alarm relay is dedicated to this function and should not be connected to
other circuits.
To ensure that general alarm functions properly, adhere to the following:
1. The CPU default program automatically maps the Form-C alarm relay to all initiating
zones in the system. While this is a default map, the AIM- programmer should ensure
that this relay is indeed mapped to all initiating circuits, including the eight zones on
each AIM. This guarantees that any alarm in the system will activate the alarm relay,
which will in turn signal a general alarm throughout all AIMs on the alarm bus connec-
tion.
2. The alarm relay must be programmed as a non-coded point. If it is not, the alarm relay
contacts will pulse general alarm bus connection, causing the AIM-200(s) to oscillate in
and out of alarm.
3. The CPU alarm relay must be programmed as silenceable, permitting the silencing of
general alarm modules with software type
C
(see Figure A-1).
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