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smoke detector analogue
ring

manual alarm button
FBIP

alarm panel horns
flash- SS
light
KD
RE
FBIP
FBOP
TE
fixed-line
operator
230 V

Figure 9.9.2 Lightning and surge protection for a fire alarm system with analogue ring technology

magnetic contact IR detector 1 block
and glass break lock 1
detector

buzzer arming acknowledgement 1
magnetic contact block IR detector 2 hold-up
and glass break lock 2 button
detector
alarm panel

arming acknowledgement 2
horn 1

TE
horn 2
fixed-line
operator
flashlight
230 V

Figure 9.9.3 Lightning and surge protection for a burglar alarm system with d.c. circuit technology

310 LIGHTNING PROTECTION GUIDE www.dehn-international.com