14
Push Buttons
SILENCE [S]
Operates on the external sounder output. The visual
display is not affected.
ACKNOWLEDGE [A]
Will stop the LED/LCD’s flashing and silence the
audible. If a new alarm occurs on an already
acknowledged system the audible will sound and
the new alarm will flash.
For full details refer to the sequence table relating to
the alarm sequence selected.
RESET [R]
Will only operate after the alarm has been
acknowledged and the plant condition has returned
to
normal.
For full details refer to the sequence table relating to
the alarm sequence selected.
TEST [T]
Illuminates all LED’s and all segments of LCD's on
every alarm channel irrespective of alarm status.
Will also drive the local horn and the external
sounder. This function operates as long as the
pushbutton is pressed.
This function will not change the alarm state.
SYSTEM TEST [S & T]
Pressing and holding Silence and Test buttons
for 4 seconds will cause the LN1000 to enter a test
routine. Each channel is put into the highest state of
alarm and latched in, it is then necessary to operate
the Acknowledge and Reset pushbuttons to clear
the
alarms.
This test will also operate both the local and
external sounders and the two common outputs B1
and B2
Other Features
INTERNAL
Internal push-buttons can be disabled by a jumper
link
EXTERNAL
Terminals provided for optional external normally
open
pushbuttons
OPTIONS
Horn re-sound delay after silence. Adjustable on
Sequence Card between 0.5 to 15 minutes or
infinite
silence
