11
LST700 SERIES INSTALLATION & MAINTENANCE MANUAL • Approved Document No. DFU7002012 Rev 4
LST700 SERIES FIRE ALARM PANEL
DO NOT
ADJUST
BATTERY FUSE
1.6AF
+
Red
I Black
To
Battery
BAT1
PLK2
AUX 24V
PL2
To Main
Control
PCB
L N
PRIMARY
FUSE F1
1ATH 250V HRC
L N
FUSE
CONN1
Figure 9 : Power Supply PCB layout and mains connection details
Figure 10 : Battery location and connection details
Incoming Mains cable must be
segregated from other cables and
should only enter the Panel through
either of these knock-outs. Good quality
cable glands must always be fitted.
L = Live; N = Neutral, = Earth.
The incoming mains earth wire must
be connected to the terminal marked
and not to the base earth post.
(The PSU earth strap connects the
PCB to the base earth post).
PSU earth strap
Do not operate the
Panel without this
strap connected
Battery leads
(supplied in the
Panel’s accessory
pack). See below for
connection details .
Battery fuse (F2)
20 x 5mm 1A6 F to
IEC 127 (EN60127
Part 2). Do not use
any other type or size
of fuse in this position.
Primary fuse (F1)
20 x 5mm 1A HRC
Ceramic to IEC 127
(EN60127 Part 2). Do
not use any other type
or size of fuse in this
position.
+
I
+
+
I
–
+
–
LOCATION OF MEDIUM
SIZED BATTERIES
typically 2.1 AHr
+
+
–
–
+
Take care to arrange
batteries so terminals
do not touch
LOCATION OF LARGE
SIZED BATTERIES
typically 3.0 AHr
CONNECTION OF
LEADS TO POWER
SUPPLY PCB
Run the battery leads
(supplied in the Panel's
accessory pack)
through the slits in
the plastic ribs
RED
BLACK
Link wire
Hazardous voltages present light
When lit red, hazardous voltages will
be present on the components in the
shaded area of the PCB.
DO NOT TOUCH.
Certain components are
charged to this hazardous voltage
during operation, and this charge is
bled away after the mains supply has
been removed. When the red light
extinguishes, the charge has leaked
away to a safe level.