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The ARS100 is an alarm system that monitors up to 48 inputs. The system consists of 3 modules: the ARS1 processor module, the ARS48 wall alarm panel, and the ARS8 desk alarm panel. The wall display panel indicates the idle or active alarm status with 48 green and 48 red indicators. The desk display panel indicates the idle or active zone status with 8 green and 8 red indicators. Any of the 48 alarms can be placed in any of the 8 zones. The display panels are equipped with an audible alert device. The acknowledge button is used to silence the audible alarm. The audible alert sounds when the alarm is detected and when the alarm goes away.
The processor module is equipped with a voice synthesizer. It reports alarms by dialing 1 to 8 telephone numbers and alerting the recipient with a voice message. It has the ability to dial a secondary number for numeric paging purposes.
It is also possible to dial into the system to verify the presence of any alarms. Dial in access is password protected. No changes can be made to messages or passwords in this mode. Any of the pre-stored messages can be played back using touch-tone codes.
The processor module and the displays are all powered by 48vdc. DC to DC converters change this voltage to +12v and +5v for the control circuitry. A voice synthesizer reports alarm messages by reading stored text. A modem connection allows remote dial-up access using a computer with a terminal emulator. The maintenance access is password protected. An administrator can change passwords and the reporting telephone numbers.
There are 48 green and 48 red indicators on the wall alarm panel. Each indicator represents a separate alarm input. Normally all the green indicators are on and the red indicators are off.
When an alarm is detected the associated green indicator turns off and the red indicator starts flashing. The audible alarm turns on. When the "acknowledge" button is pressed, the red indicator turns on steady and the audible alarm turns off.
When the alarm condition clears, the associated red indicator turns off and the green indicator starts flashing. The audible alarm turns on. When the "acknowledge" button is pressed, the green indicator turns on steady and the audible alarm turns off.
Data is sent to the alarm panel using serial 485 drivers for data and clock. One pair is used for data, one pair for clock, one pair for the audible alarm and one pair for the acknowledge signal.
There are 8 green and 8 red indicators on the desk alarm panel. Each indicator represents a separate group or zone of the 48 alarms. The operation is not straight forward since any alarm can be grouped with any or all zones. A zone that has any alarms present will indicate red. It will return to green only if there are no other alarms in that zone. Nothing will happen if two alarms are present in the same zone and one alarm retires.
Nothing will happen if an alarm is detected that has no zone assignment.
The processor module provides all the intelligence of the alarm system. It is equipped with integrated circuits to interface the various external devices. The memory containing telephone numbers and passwords retains its data during the absence of power. The following describe the input and output connections.
All alarm inputs are optically isolated to protect the processor from voltage spikes and surge transients. A 48v current limited feed is provided for each input. Any external equipment provides a dry closure to activate the detector. About 3 milli-amps current flows in the input.
Two RJ48 jacks provide the necessary connections for the main alarm and desk alarm panels. These panels will work up to 1000 feet from the processor module.
| PAIR | SIGNAL | |
| 1 | = | data |
| 2 | = | clock |
| 3 | = | acknowledge input |
| 4 | = | audible alert output |
An RJ11 jack connects to a telephone line. This is the line used to report any alarm. It is also used to call into the system for alarm and message playback.
Two RS232 ports are provided. Serial 1 is used for alarm display only. It is not password protected. Serial 2 can be optioned for DTE for modem connection or DCE for terminal connection. The modem connection is intended for dial up diagnostic purposes. It is protected by a general password for viewing alarms and a maintenance password for implementing changes. The maximum length for a direct cable connection is 50 feet. For extended distances (up to 20 miles) using a direct cable connection, a short haul modem, such as the ASM-11 from RAD, may be used. For more information contact RAD at: http://www.rad.com.
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