Operation Switch Functions for ADT-LCD40 Only
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Document 50520 Rev D 7/25/00 P/N 50520:D
2.2 Switch Functions for ADT-LCD40 Only
2.2.1 Key-switch
The key-switch is used to enable
and disable the operation of the
function switches if switch 2 on
DIP switch SW1 has been placed
to the On (Down) position.
To enable the Acknowledge,
Silence, Drill and Reset function
switches, insert a standard ADT
key into the key-switch located at
the top right corner of the
ADT-LCD40. Make certain the
key is inserted completely before
attempting to turn it. Turn the key
clockwise until it stops. Leave the key inserted while pressing the
function switches. When finished with the function switches, turn
key-switch counterclockwise to disable function switches.
Note that the key-switch should normally be in the disabled position
(fully counterclockwise), with the key removed and access to the key
restricted to authorized personnel only. Do not leave the key
unattended in the ADT-LCD40.
2.2.2 Acknowledge
When the Acknowledge switch is pressed and released, the
ADT-LCD40 sends an Acknowledge command to the control panel.
Pressing the Acknowledge switch silences the local piezo sounder,
the sounders located in all other system annunciators and the
sounder located on the Fire Alarm Control Panel's main circuit
board. It will also change all flashing system LEDs to steady on.
Only one press is necessary regardless of the number of new alarms,
troubles or supervisory signals.
An acknowledge message is also sent to the printer and the history
files in the Unimode 200. Multiple active events (alarms, troubles,
supervisories) are scrolled on the display at a one second rate, but
may be held for sequential display by pressing and holding the
Acknowledge switch.
When more than one event exists, the first press of the Acknowledge
switch silences system piezo sounders and changes all flashing
Reset
TOR
Key-switch (shown in Off position)
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