M-1 April 200376-100016-002
PEGAsys™ LV
APPENDIX M
ADDRESSABLE ALARMLINE™ MODULE
M-1 INTRODUCTION
The Addressable AlarmLine
TM
Module (AAM) permits an
AlarmLine sensor cable to be directly interfaced to the
PEGAsys LV control panel. This interface will allow for pre-
alarm, alarm and trouble conditions to be transmitted to the
control panel via the RX/TX (Receive/Transmit) loop. The
AAM monitors the resistance of the sensor cable and gener-
ates a pre-alarm (if enabled), alarm or overheat output (if
enabled) when the resistance drops below the programmed
threshold. The module also supervises the AlarmLine cable
for opens and shorts, which will generate a fault condition. All
of the pre-alarm, alarm, overheat and trouble conditions will
be displayed on the Central Control Module (CCM) of the
PEGAsys LV panel. Up to 255 AAM modules can be con-
nected to a single RX/TX module. The use of multiple AAMs
allows for flexibility in zoning larger installations for location of
alarm and zone output control; the control panel acts as a
central display and control interface.
For complete information, please refer to the AlarmLine
Addressable Linear Heat Detector Installation, Operation
and Maintenance Manual (P/N 73.04).
TM
Figure M-1. Addressable AlarmLine™ Module Front
Panel
M-2 ADDRESSING AND REGISTERING
Each AAM is shipped from the factory with the default ad-
dress of ‘000’. This permits connection to the Power Com-
munication (PC) line without interfering with devices already
on the loop. Only one device with this default address
should be connected to the PC line at a time. Alternately,
the AAM address can be preset with a hand-held program-
mer (P/N 74-200013-001) after which the module can be
connected to the PC line. If a hand-held programmer is
not available, the address can be changed directly at the
CCM using the procedure outlined in Chapter 2 of this
manual.
M-3 OPERATION
A change in temperature produces a change in resistance
between the loops within the sensor cable (as the tem-
perature increases, resistance decreases exponentially).
This change is continuously monitored by the AAM, which
generates an alarm or pre-alarm signal at a predetermined
level corresponding to the temperature set point.
The temperature at which the system will alarm is deter-
mined by selecting one of 16 configuration settings using
the control panel’s configuration software or CCM menu
options. The appropriate configuration setting for a given
set point is established by the use of a nomogram incor-
porating two known factors:
• Maximum ambient temperature of the alarm zone
• Length of the sensor cable
The integrating (averaging) effect of the sensor cable al-
lows it to detect localized hot spot or a low level tempera-
ture increase over the entire length. For more detailed
information, please refer to the AlarmLine Addressable Lin-
ear Heat Detector Installation, Operation and Maintenance
Manual.
M-4 MAINTENANCE OR REPLACEMENT
The AAM is shipped from the factory as an assembled
component and is not field serviceable. Little or no main-
tenance is required.
Refer to Chapters 4 and 5 of this manual and to the AlarmLine
Addressable Linear Heat Detector Installation, Operation and
Maintenance Manual for further information on maintenance
and testing of field devices connected to the PEGAsys LV
panel's RX/TX loop.
M-5 PARTS LIST
Refer to Chapter 9 of the AlarmLine Addressable Linear
Heat Detector Installation, Operation and Maintenance
Manual.
M-6 INSTALLATION
Refer to Paragraph 3-2 of the AlarmLine Addressable Lin-
ear Heat Detector Installation, Operation and Maintenance
Manual.
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