A
properly wired detector or manual pull station has its Alarm contacts (or
equivalent) closed across terminals 25 and 26 of the Control Panel.
An Alarm condition causes the following sequence of events to occur:
o Control Panel terminals 25 and 26 have a closed circuit path
o Control Panel goes into Trouble condition (see paragraph 1.2.3)
o Alarm relay
(Kl) energizes
o
Alarm relay (Kl) contacts 1 and 3 close
o Alarm relay (Kl) contacts
6
and
8
close
o Alarm lamp goes ON (between terminals 7.and
8)
o Diode CR2 conducts (between terminals 26 and 12)
o Resistor R3 or external device (auxiliary alarm) has
supply voltage applied (between terminals 12 and 11)
o Alarm bells turn ON (between terminals 22 and 21)
o Circuit conducts between terminals 21 and 11.
Silencing the Alarm bell circuit is done by placing the Alarm Silence
switch (S2) in the Silence position. The Alarm Silence lamp now goes ON
(between terminals
9
and 6). Note the auxiliary Alarm, terminals 12 and
11, cannot be silenced.
The Alarm relay (Kl) is locked ON as a result of its contacts
1
and 3
closing (terminals 26 and 27 are always shorted). This relay (Kl) coil
now has the full DC voltage applied across it.
Resetting the Control Panel can only be done by momentarily placing the
Reset switch (S3) in the Reset condition.
Be sure the alarmed detector or manual pull station is in the Normal condi-
tion or removed from the detection loop before resetting the Control Panel.
......................................
-dl@
555
M
DOCUMENT
NO.
001-097-00
PAGE
1-7
M~naco
~nie~~~ises
int.
SPOKANE. WASHINGTON
99214
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