List of standard interfaces on the controller PCB
The controller PCB is the one mounted in the lid of the Firepoint 2 fire
alarm ...
|
Class
change and remote evacuate (on controller PCB in lid)
Warning! These are LOW VOLTAGE terminals. Do NOT connect them
to any AC or DC supply or current source. They must be connected ONLY to
volt-free terminals such as buttons or the switched contact terminals of relays.
| Evac |
Connect this terminal to the common
terminal using a relay or push button in order to trigger the remote evacuate
signal. A remote evacuate will cause the red firelamps to be illuminated
and an entry in the system event log will be made.
|
| Common |
This is the common or return line
for "Evac" (above) and "Class" below. It is connected
internally to the systems 0V power supply rail.
|
| Class |
Connect this terminal to the "common"
terminal using a relay or push button in order to trigger the "manual ring".
A manual ring does not count as an emergency condition — the alarms will
sound but the red lamps are not illuminated and no entry is made in the event
log. Normally you would use this terminal for the "class change"
facility at a school. It can be use, however, on very large installations
as a means of joining two or more panels together. If this is what you need to
do, click here to see how.
|
|
COMMS-1 (on controller PCB in lid)
Warning! These are LOW VOLTAGE terminals. Do NOT connect them
to any AC or DC supply.
These terminals are used, along with
one of the "common" terminals, to connect the Firepoint 2 control
panel to the multiplex relay unit. Do not attempt to use them for any other
purpose and leave them unconnected if you are not using the multiplex relay unit.
|
COMMS-2 (on controller PCB in lid)
Warning! These are LOW VOLTAGE terminals. Do NOT connect them
to any AC or DC supply.
These terminals are used to connect
the Firepoint 2 control panel to the repeater panel or zone-extender panel.
| "A" |
This is one of the signal lines between
the panels. The connection should be made on a twisted pair cable with the
other wire connected to the "0V" terminal.
|
| "0V" |
The two return wires for the "A"
and "B" terminals should be connected to this terminal.
|
| "B" |
This is one of the signal lines between
the panels. The connection should be made on a twisted pair cable with the
other wire connected to the "0V" terminal.
|
| "5V" |
This terminal is not
used. Do not connect anything to it. |
|
General layout of Firepoint-2 controller PCB
|
List of standard interfaces on the power PCB
(The power PCB
is the one mounted in the back of the chassis of the Firepoint 2 fire alarm)
Aux 24V (on power PCB in chassis)
Warning! These are LOW VOLTAGE terminals. Do NOT connect them
to any AC or DC supply.
These terminals can be used to provide
a voltage supply for other equipment.
| "+" (plus) |
This terminal will be at approximately
+24V relative to the "-" terminal and the other "common" terminals
of the Firepoint 2 controller PCB. There is a 250mA fuse in series
with this terminal. The terminal is monitored by the Firepoint 2 and
a fault message will be given if the fuse blows or is removed.
|
| "-" (minus) |
This terminal provides the return
path for current flowing from the "+" terminal. Within the Firepoint 2
unit, this terminal is connected to the 0V supply rail and, hence, to all of the
"common" terminals of the controller PCB.
|
|
FLT (on power PCB in chassis)
Warning! This is a LOW VOLTAGE terminal. Do NOT connect it to
any AC supply or to any high-energy DC supply.
This is the "fault" terminal.
During normal operation it is pulled to the 0V supply rail by a low power FET
(field effect transistor). This transistor is not able to sink large currents
and will be destroyed if any high power energy source is connected to it. It
would be capable of pulling the contacts in on a small relay that is powered from
the "+" (plus) terminal of the "Aux 24V" group. Make
sure that the relay has a reverse diode across the coil or the FET will quickly
be destroyed.
When a fault occurs on the system,
the FET is switched off and so this terminal becomes effectively open-circuit
(non-conducting).
|
|
Fire
relay terminals (on power PCB in chassis)
These terminals can be used to control
external equipment. The terminals are volt-free meaning that no current
will flow from the Firepoint 2 control panel onto these terminals. These
are the only terminals on the Firepoint 2 PCBs that can be connected directly
to the 240VAC mains electricity supply. The relay contacts are able to switch
1A resistive load.
| COM |
This terminal is connected through
a relay contact to either the "NO" or the "NC" terminal. During
normal operation of the Firepoint 2 fire alarm, there will be an electrical
connection between the COM terminal and the "NC" terminal. During
an unsilenced fire condition or evacuate condition the COM terminal will be connected
electrically to the "NO" terminal.
|
| NC (normally closed) |
This terminal is connected to the
COM terminal almost all of the time. The circuit is broken, however, when
an alarm or evacuate condition occurs.
|
| NO (normally open) |
This terminal will be connected to
the "COM" terminal when a fire or evcacuate condition occurs. It
remains connected to the COM terminal until the alarm condition is silenced using
the key-switch on the Firepoint 2 front panel.
|
|
General layout of Firepoint-2 power PCB
|
Links
The Firepoint 2 fire
alarm panel.
