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FIREFINDER SERIES II
INSTALLATION,
COMMISSIONING
&
OPERATION
4.9
Current Limiter, Fuse Board (BRD85CLFB)
The Current Limiter, Fuse Board provides protection for the boards, cards and other 27VDC
distribution within the FACP when the 18Amp power supply is used. The four LED’s associated with
the board indicate that 27VDC is available at each of the outputs CN1
– 5.
F5
F4
F3
F2
F1
CN5
CN4
CN3
CN2
CN1
HS1
TB1
TB4
Q3
Q1
Q2
RV1
U2
U1
N1236
BRD85CLFB
1A
1A
1A
1A
1A
+ OUTPUT -
+ BATT -
+ PSU I/P -
T O
BRD85BPMB
TB1
+27V
0 V
+BATT V
CN1-5 PINOUT = 0V, +27V, 0V
0V+27V 0V
+27V 0 V
T O
BRD85BPMB
CN1
MAF, FRONT DOOR
AND BACKPAN
DISTRIBUTION
DISTRIBUTION
EV60 / 120 TONE GEN
(Not Current Limited)
Figure 10: Current Limiter Fuse Board