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FIREFINDER SERIES II
INSTALLATION,
COMMISSIONING
&
OPERATION
13.2 Communications Extender Board (BRD82LTB)
The Communications Extender Board is mounted inside the FACP and provides protected RS485
communications and 27VDC to the
SmartTerminal
Termination Board/s and LCD/s and LED
Mimics.
CH16
CN18
RN17
RN20
LO
O
P
CO
MM
S
B
R
D
8
2
L
T
B
2
TB1
TB4
M1
M2
CN2
CN5
CN4
COMMUNICATIONS EXTENDER BOARD
FACP MAIN
BOARD
RJ45
CABLE
TO AVAILABLE 27VDC
CONNECTOR (3 WAY)
SHIELDED COMMS CABLE
SHIELD
+24VDC
C15
C12
ZD2
ZD3
TH2
TH1
L2
L1
L6
RS485 OUT
C O M
-
+
TO NEXT SmartTerminal
or LED MIMIC
0 V
+24V
CN3
0 V
IN
27VDC
IN OUT
OUT
CN20
Figure 95: Communications Extender Board PCB Layout
MAIN CONTROL BOARD (BRD85MBA)
FACP FRONT PANEL CONTROL (BRD85CTLA)
CN3
EXPANSION LEDS
C
N
2
1
CN20
TH1
CN8
CN1
CN6
D13
D14
C
N
3
BZ1
CN5
CN2
CN7
CN11
CH16
CH15
CH6
CH8
CH2
CH1
CN16
CN14
CN18
R17
TP3
RN17
RN20
CN4
CN10
CN15
CN13
CN17
c
b
a
4
3
2
BRIGADE I/F
FRONT PANEL
EXPANSION LEDS
EXPANSION PANEL
MODEM
2
7
V
I
N
PRINTER
PSU MONITOR
L
O
O
P
C
O
M
M
S
1
+
C
N
1
C N2
1
SLAVE CPU
(302-6692)
CH8
C
N
1
C N2
1
CH8
C
N
1
C N2
1
SLAVE CPU
(302-6692)
SLAVE CPU
(302-6692)
U15
CN2
a b
c
U11
U10
U14
U13
CPU BOARD
(BRD85CPU)
CN1
2
5
/1
1/
200
5
B
R
D
8
2
L
T
B
2
TB1
TB4
M1
M2
C N 2
C N 5
C N 4
TERMINATION BOARD No.1 ( BRD82LTB2 )
COMMUNICATIONS EXTENDER BOARD
( ITEM NUMBER 159 - 0129 )
FACP CABINET
SmartTerminal 1
SmartTerminal 2
(IF FITTED)
RJ45
CABLE
TO AVAILABLE 27VDC
CONNECTOR (3 WAY)
SHIELDED COMMS CABLE
SHIELD
TO NEXT LCDA
MAXIMUM OF 30
LK1 MUST BE FITTED TO
THE LAST BOARD ON
THE COMMS BUS
+24VDC
TERMINATION BOARD No.2 ( BRD82LTB2 )
T O
LCD
T O
LCD
CN1
0 V
POWER OUT
POWER IN
+24V
RS485
I N
RS485
O U T
0
3
/0
5
/2
0
0
6
B
R
D
8
2
L
T
B
2
-
TB2
TB1
TB4
TB3
LK1 NOT FITTED
C O M
-
+
C O M
-
+
0 V
+24V
CN1
0V
POWER OUT
POWER IN
+24V
RS485 IN
RS485 OUT
0
3
/0
5
/2
0
0
6
B
R
D
8
2
L
T
B
2
-
TB2
TB1
TB4
TB3
COM
-
+
COM
-
+
0V
+24V
C15
C12
ZD2
ZD3
TH2
TH1
L2
L1
L6
RS485 OUT
C O M
-
+
POWER OUT
0 V
+24V
C N 3
+24V
0 V
V D C
I N
V D C
O U T
0 V
Figure 96: Connecting the
SmartTerminal
to the FACP