6/28/2011 DOC.NO.: 150D - 1
P/N RE 150D Rev. No. 1
13
Local Buzzer
A piezo buzzer provides separate and distinct sounds for
alarm and trouble conditions:
Alarm – steady
Fault – pulse 0.5sec ON and 0.5sec OFF
2.3.2
Controls
SELECT, TEST and ISOLATE Keys:
The SELECT is used to select any
particular zone for isolation or for test. When it is pressed, zone 1
will be selected first with the identification of ISOLATE LED
blinking; consecutive SELECT key presses can change the zone
selection to 2. The particular zone can be isolated by pressing
ISOLATE key or tested by pressing TEST key.
When pressing the ISOLATE by selecting the zone, the
previous status of isolate LED will be interchanged, i.e. it may go
from ON to OFF or OFF to ON. The ON status indicates that the
zone has been isolated. By the time, no voltage will be there in
the isolated zone loop. And the OFF status indicates that the
zone has been normalized.
After the selection of particular zone, if the TEST key is
pressed, that particular selected zone is tested with buzzer
sound.
Note:
a.
We strongly recommend to avoid isolating any particular
zone unless it is essential for maintenance purpose.
b.
For zone isolation and their normalization, use ISOLATE key.
ACK Key:
During fire/fault condition, ACK key is used to silence
the external Sounders (NAC) and the internal buzzer tone.
RESET Key:
This key is pressed to reset the entire system and
While in reset condition, all detector loop voltages are cut off
up to 3 seconds for Detectors and MCPs, Then voltages are put
on to the loop.
Note: The zone loop voltage will cut off only in fire
condition during reset.
