Ampac FireFinder PLUS - Way Fan Termination Board

Page 68
12.12 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
TB2 – 5 Terminals
Function
1
2
3
4
5
6
Start
Stop
Run
FLT
Stop
Com
FLT
Cabling from FACP
to Plant / Equipment
STOP
RUN
Cabling from FACP
to Plant / Equipment
1 2 3 4 5 6
COM
RUN
3 Wire Fan Control
Cabling from FACP
to Plant / Equipment
1 2 3 4 5 6
FAN MONITORING
0V
INPUT 1
+24V O/P
STOP
START
FAN CONTROL
SOLID STATE OR
RELAY INTERFACE
FAN MONITORING
FAN CONTROL
SOLID STATE OR
RELAY INTERFACE
FAN MONITORING
4 Wire Fan Control 5 Wire Fan Control
STOP
STOP
START START
RUN
STOP
COM
COM
FAN CONTROL
SOLID STATE OR
RELAY INTERFACE
0V
INPUT 1, 2
+24V O/P
0V
INPUT 1, 2, 3
+24V O/P
Figure 95: 3, 4, 5 Wire Fan Control to Termination Board
TB4
TB3
TB2
TB5
0V +27V
POWER
FAN 1
FAN 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
TB2, 3, 4, 5
FAN "N"FAN "N"
STOP COMSTOPFLTRUNSTART
Termination to Control I/F
Figure 96: Fan Termination Board Layout and Typical I/O Wiring
Note: See Section 17 for Addressing Details (SW1)