Backup Alarm Bus; Signal Silence Function - Johnson Controls AIM-200 Technical Manual

Backup Alarm
Bus
Signal Silence
Function
50 Addressable Intelligent Module—AIM -200 Addressable Intelligent Module
The interconnection of alarm bus cables between each AIM
backup general alarm capability in the event of communications failure with
the CPU. Under this condition, the following events will take place.
When an alarm occurs on an AIM -200, output modules mapped to the
alarmed zone will be activated. The AIM -200, unable to communicate
with the CPU, will assume general alarm responsibility and will close its
own alarm bus cable connection. This has the same effect as a signal from
the alarm relay --all AIM-200s receive a alarm bus cable closure and enter a
general alarm condition.
Signal Silence will only function for those M510CJs that have been
programmed as indicating appliance modules (software type
and have been programmed for general alarm service (see the General
Alarm Service section of this document).
The Signal Silence function is exercised by first closing, then opening, the
alarm bus cable connection. The closure occurs after initiation of an alarm-
-when the alarm relay changes state. The opening occurs when the
SIGNAL SILENCE switch is pressed--the Alarm Relay is silenced,
opening the alarm bus connection. This signals the AIM
all general alarm M510CJ modules.
Signal Silence has no effect on M510CJ Control Modules that are Form
(Type ), address 60 or higher, or that are mapped to any AIM -200
zone. These modules can only be silenced by the RESET switch on the
CPU.
-200 provides
)
-200(s) to silence
-C