Specifications

Page 62
EN54 FIREFINDER PLUS INSTALLATION,COMMISSIONING & OPERATION
12.11 4 Way Fan Termination Board
The Fan Termination Board (BRD25FTB) interfaces between the Fire Fan Module and the
plant/equipment it controls via the 24 volt 250mA Start, Stop, current limited, relay outputs and
monitor inputs. Programmable monitoring of the field equipment is achieved using 0 volts as an input
level to indicate run, fault and stop conditions of that equipment. Monitoring is programmed in the
Function Menu for a 3, 4 or 5 Wire Start / Stop, Run, Fault, Stop & Common functions. The inputs
are protected by way of resettable transorbs and resistive / capacitive networks.
Connections
Terminals
Function
TB2 to TB5
Start
Stop
Run
FLT
Stop
Com
FANS 1 to 4
COM
STOP
FLT
RUN
Cabling from FACP
to Plant / Equipment
0V
INPUTS 1, 2 & 3
+24V O/Ps
COM
STOP
RUN
Cabling from FACP
to Plant / Equipment
1 2 3 4 5 6
0V
INPUTS 1 & 2
+24V O/Ps
STOP
COM
RUN
START
3 Wire Fan Control
Cabling from FACP
to Plant / Equipment
1 2 3 4 5 6
FAN CONTROL
SOLID STATE OR
RELAY INTERFACE
FAN MONITORING
0V
INPUTS 1
+24V O/Ps
STOP
START
FAN CONTROL
SOLID STATE OR
RELAY INTERFACE
FAN MONITORING
STOP
START
FAN CONTROL
SOLID STATE OR
RELAY INTERFACE
FAN MONITORING
4 Wire Fan Control 5 Wire Fan Control
TB4
TB3
TB2
TB5
0V +27V
POW E R
FAN 1FAN 1
STOP COMSTOPFLTRUN
FAN 2
STOP COMSTOPFLTRUNSTART
FAN 3
FAN 3
STOP COMSTOPFLTRUNSTART
FAN 4
COMSTOPFLTRUNSTART
FAN 4
STOP
START
FAN 2
CN1
CN2
CN3 CN4
RS485 Control
Comms In
RS485 Control
Comms Out
27VDC Out27VDC In
SW1
Address SW
(See Note)
1 2 3 4
ON
ON
Fit EOL Termination
Link if Last Module
on Comms Bus
Figure 88: Fan Termination Board Layout and Typical I/O Wiring
Note: See Section 17 for Addressing Details (SW1)