P/N 06-236530-001 3-101 August 2013
3-2.5.4.3 Non-Latching Operation
Some SmartOne alarm devices can be configured for non-latching
operation. Non-latching operation refers to the special way that Alarm Off
messages from initiating devices are processed by the ARIES Control Unit.
Each SmartOne alarm-initiating device (such as a smoke detector)
transmits an Alarm On message when it detects a fire signature in excess
of its configured threshold value. An AI Monitor Module monitoring a
normally-open contact detects a contact closure from the contact.
The SmartOne automatic alarm-initiating devices and monitor modules
also transmit Alarm Off messages when the detected fire signature drops
below the configured threshold value and when the contact closure is
removed, respectively. The ARIES Control Unit always displays every
Alarm On message, but will not display an Alarm Off message unless the
alarm device is configured for non-latching operation. Each Alarm Off
message from a non-latching initiating device is treated as a system event
that requires operator intervention.
3-2.5.4.4 ARIES Alarm-Off Messages
The ARIES Control Unit will only display an Alarm Off message from an
alarm-initiating device such as a smoke detector if the device is configured
for non-latching operation.
The upper line of the LCD display shows the event by the device address,
the change of state, and the device type. The lower line indicates the up-
to-40-character message assigned to the alarm-initiating device using the
ARIES configuration program.
Figure 3-13. Typical Alarm Off Message
The following actions also occur when any Alarm Off condition is reported
by a non-latching, alarm-initiating device:
• The Alarm LED on the display flashes
• The internal buzzer pulses
• The Alarm Off event is stored in the event log
Note: All Alarm Off messages are logged, regardless of whether the
initiating device is configured for non-latching or latching
operation.
• The Alarm Off message is transmitted to peripheral devices such as
RDCMs and ATM-Ls, if applicable
• The Alarm Off message is communicated via the RS-232 ports
050 ALARM OFF PHOTOELECTRIC
COMPUTER ROOM
Alarm-Off Indication (Non-Latching Devices only)
Device Type Reporting Alarm Off
Device Address 050
Device-Specific
Custom Message
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