LN1000 IS Annunciator
45
SECTION 13 SYSTEM OUTPUT CONNECTIONS
General
In addition to the audible output signals there are various additional outputs available from
the annunciator.
These can be used to trigger control action from the safe area or activate further alarms.
These outputs can be common to the system or individual to each channel.
Audible outputs
Two audible outputs are available from the Sequence Card. These are designated "Horn"
and "Ext.Sound". (The "Horn" output is not used)If a higher level of sound is required the
"Ext.Sound" output is used to drive an external IS relay which is used to switch power to a
high output sounder e.g. Type DB5 or DB7.
These examples are shown in Figures 13.1 and 13.2
This output follows the alarm sequence as defined in section 6 on Alarm Sequences. When
the Test pushbutton is pressed both Audible outputs are activated.
Connections to sounder using safe area mounted IS relay (Figure 13.1)
IS R E L A Y
L N 1 0 0 0 /S C S E Q U E N C E C A R D
8
1 0
1 1
1 2
9
7
4
3
1 4 9
D A A
H A Z A R D O U S A R E A
D B -5 1 0 0 d B
IS S O U N D E R
S A F E A R E A
2
1
+
2
1
-
1 1
1 2
M T L 5 0 2 1
