Ampac FireFinder PLUS, Installation, Comissioning & Operation

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Page 80
12.16.2 Agent Release Module
The Agent Release Module controls and monitors all the requirements for agent release.
Fit EOL Termination
Link 1 if Last Module
on Comms Bus
In Out
C
N
1 C
N
2
RS485 Control
/ 27VDC
Comms In
Top Module & PCB
Securing Clips
RS485 Control
/ 27VDC
Comms Out
TB4
LK2
+
MANUAL
RELEASE
INHIBIT
SWITCH MON
DISABLE
LK1
LINK
TERMINATOR
EOL
1
2
3
4
ON
S W 2
ADDRESS
SWITCH
10K
EOL
MCP
AGENT RELEASE
Figure 103: Exploded View of Module and Front Panel Layout
The PCB is fitted with two 2 x RJ45 connectors CN6 & 7 for power (27VDC) and communications
(RS485) for communications between the Agent Release Module and the FACP Main Control Board.
Controlled Access
It is a requirement that control be secured from unauthorised use. A keyswitch has
therefore been included in the control process.
The FCP goes into service mode when the keyswitch is switched to SERVICE INHIBIT. This results in
the selected agent activation circuit being electrically isolated and a Common Isolate condition being
indicated at the FACP. This condition can also be confirmed through the Status Menu. To remove the
key it is necessary for the switch to be in the
OFF position.
Pressing Select toggles the selection of either the Main or Reserve release agent. Selection
is indicated by the Main and Reserve Agent LED’s
Pressing the Agent Inhibit switch will inhibit the gas from release in either the Manual or
Automatic mode. The Agent Inhibit switch has an internal lamp fitted with yellow lens and is illuminated
when the Inhibit switch is activated at the FACP or any of the LCS’s. To prevent accidental operation
this switch has a hinged clear plastic cover that has to be raised to access the switch.