
GST100 Intelligent Fire Alarm Control Panel
Installation and Operation Manual
Page 42
Appendix 1 Internal Connection Diagram
R+
L
PG
N
R-
RXD
SPEAKER
GND
XS4
1
XS1
3
4
2
+5V
BUSY
GND
+24V
GND
XT1
XT2
VCC
TXD
GND
+
-
-
+
Loop IN
Loop OUT
ALARM OUTPUT
FAULT OUTPUT
COM
NO
NC
NO COM NC
EARTH
XS2
Interface Board
LCD
To Battery
Speaker
Printer
Main Board
LED/Keypad Board
485 Network Board
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