+
NAC1 and NAC2 accept devices that operate wit
-
hin SELV limits ONLY.
n
Extinguishment Module Terminals
EM Supervised/Bypassable Manual Extingui
-
shment Input
This Input is for manual activation of the Fire Extingui
-
shment systems.
Standby status of this Input can be either Normally
Open (at default) or Normally Closed (refer to “Manual
Extinguishment Input” under “Enrolling: Extinguishment
Modules” in the “PROGRAMMING FROM PC”)
Operating principles:
Ø
the Control panel will consider the EM Input OPEN
when a 3.900 ohm resistance is applied to its [+] and
[–] terminals;
Ø
the Control panel will consider the EM Input CLOSED
when one or more (up to 10) 680 ohm resistor is/are
applied in parallel to the 3.900 ohm resistance.
The EM Input will activate when inverse conditions to its
standby conditions occur.
Activation of the EM Input will start the Pre-Extingui
-
shment Time.
Activation of the EM Input will be indicated by Glowing
on the ON Manual Ext. LED.
Short-circuit or power supply interruption on the EM Input will
be indicated by fast blinking on the Fault Manual Ext. LED.
The EM input can be disabled by means of the Disable
Manual Extinguish. key.
Disablement of this Input will be indicated by Glowing
on the Disable Manual Extinguish. LED.
IE Supervised Inhibit Extinguishment Input
This Input is for the inhibition of Fire Extinguishment
systems.
The standby status of this Input can be either Normally
Open (at default) or Normally Closed (refer to “Disable
Extinguishment Input” under “Enrolling: Extinguishment
Modules” in the “PROGRAMMING FROM A PC”).
Operating principles:
Ø
the Control panel will consider the IE Input OPEN
when a 3.900 ohm resistor is applied between its [+]
and [–] terminals;
Ø
the Control panel will consider the IE Input CLOSED
when one or more (up to 10) 680 ohm resistor is/are
applied in parallel to the 3.900 ohm resistor.
The IE Input will activate when the inverse conditions to
its programmed standby conditions occur.
If the IE Input is active when Extinguishment conditions oc
-
cur, the Control panel will activate the PR Output (Pre-Extin
-
guishment) and WILL START the Pre-Extinguishment Time.
If the IE Input activates during the Pre-Extinguishment
phase, the Control panel WILL NOT STOP the
Pre-Extinguishment Time.
In both cases, when the time has elapsed, no extingui
-
shment will occur unless the IE Input is restored to
stand-by. If the IE Input is activated during the Extingui
-
shment phase, this will have no effect.
Activation of the IE Input will be indicated by Glowing on the
ON Disab. Ext. LED.
Short-circuit or power supply interruption on the IE Input will
be indicated by fast blinking on the Fault Disab. Ext. LED.
PS Supervised Pressure Switch Input
This Input is for the Pressure Switch connection.
Standby status of this Input can be either Normally
Open (at default) or Normally Closed (refer to “Pressu
-
re Switch Input” under “Enrolling: Extinguishment Mo
-
dules” in the “PROGRAMMING FROM A PC”).
Ø
the Control panel will consider the PS Input OPEN
when a 3.900 ohm resistor is applied across its [+]
and [–] terminals;
Ø
the Control panel will consider the PS Input CLOSED
when one or more (up to 10) 680 ohm resistor is/are
applied in parallel to the 3.900 ohm resistor.
The PS Input will activate when the inverse conditions
to its programmed standby conditions occur.
Activation of the PS Input will be indicated by Glowing
on the ON Pres. Switch LED. Short-circuit or power
supply interruption on the PS Input will be indicated by
fast blinking on the Fault Pres. Switch LED.
Short-circuit or power supply interruption on the PS
Input will be indicated by fast blinking on the Fault Pres.
Switch LED.
EV Supervised Electrovalve Output
This Output is for the Electrovalve connection.
Operating principles:
Ø
in Standby status, the EV terminals will be OPEN;
Ø
during the Extinguishment phase, the EV terminals
will be CLOSED.
Activation of the EV Output will be indicated by Glowing
on the ON Electrovalve LED. Short-circuit or power
supply interruption on the EV Output will be indicated by
fast blinking on the Fault Electrovalve LED.
Up to 5 A can circulate on the EV Output.
+
This Output is not enabled if there is a fault with the
IE Input and/or the PR Output.
24P Power Boost Input
This Input is for the Power boost required by the devi
-
ces connected to Outputs PR and AE.
Wiring instructions:
Connect the [+] and [–] terminals of this Input to the [+]
and [–] terminals 47 of the Switching Power Supply.
PR Supervised/Silenceable Pre-Extinguishment
Output
This Output is for Pre-Extinguishment signalling.
Operating principles
Ø
Standby status: negative pull-down to 0 V on the [+]
terminal; positive pull-up to 27.6 V on the [–] terminal.
Ø
Pre-Extinguishment phase: positive pull-up to 27.6 V
on the [+] terminal; negative pull-down to 0 V on the
[–] terminal.
Activation of the PR Output will be indicated by Glowing
on the ON Pre Ext. LED.
Short-circuit or power supply interruption on the PR
Input will be indicated by fast blinking on the Fault Pre
Ext. LED.
Up to 1 A can circulate on the PR Output.
28 Conventional Fire Panels J424/J408
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