Specifications

Page 54
EN54 FIREFINDER PLUS INSTALLATION,COMMISSIONING & OPERATION
12.4 8 Zone Conventional Board
This board (BRD43EZC) has 8 conventional zones. Up to 999 zones max may be configured.
The zones may be used in panel programming and Input / Output programming.
The end of line type used for the board is configurable to be any one of the following:
 3k3 resistor
 10uF bipolar capacitor (EN54 Default)
 4k7 resistor
 6k8 resistor
 10k resistor
+ - -+ -+ -+ -+ -+ -+ -+
Z1 Z2 Z3 Z4 Z5 Z6 Z7 Z8
EOL
TB1 TB2
CN2
CN3
RS485 Control
Comms In
RS485 Control
Comms Out
CN4 CN5
Fit EOL Termination
Link 1 if Last Module
on Comms Bus
1 2 3 4
ON
SW1
ON
Address SW
(see Note 3)
To Zones 1 to 4 + / - To Zones 5 to 8 + / -
27V IN
+
-
27V OUT
+ - -+ -+ -+ -+ -+ -+ -+
Z1 Z2 Z3 Z4 Z5 Z6 Z7 Z8
TB1 TB2
To Zones 5 to 8 + / -To Zones 1 to 4 + / -
PRESS HERE
TO BREAK
FIRE
ALARM
Maximium of 32
devices per Zone
(See Note 2)
End Of Line
(See Note 1)
EOLEOL EOL EOL EOL EOL EOL
Figure 76: 8 Zone Conventional Board
Connections
Terminal/s
Function
TB1 to 2
ZONE +
ZONE -
Zones1 to 8
 Note 1: Each Zone circuit MUST be terminated with either a 3K3, 4K7, 6K8, 10K Ohm resistor
or 10uF 50V Bi-Polar Capacitor EOL
 Note 2: If Diode Bases are used ONLY the 10uF CAP can be used.
 Note 3: See Section 17 for Addressing Details (SW1)