Specifications
13
LST700 SERIES INSTALLATION & MAINTENANCE MANUAL • Approved Document No. DFU7002012 Rev 4
LST700 SERIES FIRE ALARM PANEL
Connecting the detector and sounder circuits
Incoming detector and sounder circuits should be connected to the relevant connector block on
the Main Control PCB as shown in Figure 12 below.
For typical detector and sounder circuit wiring diagrams, please refer to pages 7 and 8.
Figure 12 : Detector and sounder circuit connection
Z1 Z2 Z3 Z4 Z5 Z6 Z7 Z8 SC1 SC2 SC3 SC4
CC
SOUNDER CIRCUITSDETECTOR CIRCUITS INPUTSOUTPUTS
AUX
RESET
AUX
24V
0V
FAULT
ALERT
REM
CONN5
CONN6
CONN7
CONN8
CONN9
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
See 'Important notes
regarding the earthing of
screens' section below
insulated
screens
(where
applicable)
insulated
conductors
Connecting the auxilary inputs and outputs
Incoming auxiliary input and output cables should be connected to the relevant CONN8 or CONN9
connector block terminals on the Main Control PCB. If screened cables have been used, all
screens should be adequately insulated and connected between the nut and washers on the base
earth post (see inset) using eyed crimp connectors (as per the detector and sounder circuit examples
shown in Figure 12).
For a full description of the inputs and outputs available on the panel, including typical wiring
diagrams, please refer to page 9.
Important notes regarding the earthing of screens
All screens should be
adequately insulated and
connected between the nut
and washers on the base earth post (see
right) using suitable eyed crimp
connectors. Do not disturb the lower
nut, this must be secure to ensure
earth continuity. The base earth post is
provided for terminating earth screens or
drains and not as the main earthing
point. The system designer or installer
must review the external earth bonding
(if required) with respect to the national
wiring rules. That is, if the type of
installation requires protective earth bonding, then this must be applied externally and in conjunction
with the type of earthing system employed on that particular site. This must always be done with
regard to the appropriate national wiring rules.
nut
plain
washers
crimped
connections
Do not untighten lower nut
spring
washer
screens