Installation manual
Installation
71
Note:
In order to comply with EN12094-1 standard requirement, if more than one extinction channel is
managed by a single Previdia control panel (more than one IFMEXT module installed on a single control
panel) a backup FPMCPU unit have to be installed in the system, this backup unit will provide the
disablement function for each extinction channel also in the unlikely event of main FPMCPU system fault.
Connection of Input terminals
The wiring diagram illustrates the connection
to be completed on the input terminals. The
devices to be connected are: the normally
open input of a pressure switch
[A]
, a normally-
open output of a command which interrupts
extinction
[B]
and a normally-open output of an
alarm activation command
[C]
. The resistances
to be utilized are the same for each channel
Connection of output channels
The wiring diagram illustrates the connection to
be completed on the input channels. The
connectible devices are: a valve for extinguishant
gas discharge
[A]
, a device which signals the
suspension of the extinction procedure
[B]
, a
device which signals the activation of the pre-
extinction time
[C]
and a device which signals
the completed extinguishant gas discharge
operation
[D]
. The resistances to be utilized are
the same for each channel
4.20
J and E type relay output wiring (EN54)
Cables:
2-wire shielded cable
Proper section (minimum 0.5mm², maximum 2.5 mm²)
Compliant with local laws and regulations in force
2
1
PRE-EXT
2
1
HOLD
2
1
MAN-EXT
2
1
STOP-EXT
2
1
PRESSOS.
2
1
RELEASED
2
1
VALVE
3K9Ohm
orange, white,
red
C
B
A
470Ohm
yellow, purple,
brown
2
1
PRE-EXT
2
1
HOLD
2
1
MAN-EXT
2
1
STOP-EXT
2
1
PRESSOS.
2
1
RELEASED
2
1
VALVE
C
B
A
1KOhm - 1W
brown, black, red
1N4007 diodes
D
