FIRECLASS Prescient III
3.12 Function Enable/Disable Switches
Application, Installation & Commissioning Doc. version 2
19
CONFIG I/S INPUTS
When in the ON position, enables zones 1, 2, Aux zone
and Manual Release input to be individually configured
for standard or intrinsically safe monitoring. The circuits
need to be configured for I/S monitoring if Galvanic Iso-
lators or Zener Barriers are connected. I/S zones will
then be monitored for a 10 kΩ EOL resistor and differ-
ent monitoring limits due to the I/S barrier/isolator series
load. See section 4.1 for configuration details.
PRE-DISCHARGE DELAY (5S, 10S, 20S, 40S)
These four switches allow the Pre-discharge delay timer
to be configured from 0 to 60 seconds in 5-second incre-
ments. Any of the four switches in the ON position adds
to the delay value, up to a maximum of 60 seconds.
SILENT ZONE TEST
Switch OFF:- A fire alarm on any zone in Test Mode
will operate the appropriate zonal fire indicator and
the general sounder circuits for four seconds.
Switch ON:- A fire alarm on any zone in Test Mode
will operate the appropriate zonal fire indicator but
will NOT operate the general sounder circuits.
BUZZER DISABLE
Switch OFF:- The internal buzzer operates for any
fire, fault or display button operation.
Switch ON:- The internal buzzer only operates on
operation of any display button.
LATCHED FAULTS
Switch OFF:- All fault indications are non-latching
and clear once the fault clears.
Switch ON:- All fault indications are latching and
require a manual reset via the
HERSTEL BRANDA-
LARM
and/or
HERSTEL BLUSSING
buttons.
Delay
Length
(Seconds)
SW1-2
(5S)
SW1-3
(10S)
SW1-4
(20S)
SW1-5
(40S)
0
OFF
OFF
OFF
OFF
5
ON
OFF
OFF
OFF
10
OFF
ON
OFF
OFF
15
ON
ON
OFF
OFF
20
OFF
OFF
ON
OFF
25
ON
OFF
ON
OFF
30
OFF
ON
ON
OFF
35
ON
ON
ON
OFF
40
OFF
OFF
OFF
ON
45
ON
OFF
OFF
ON
50
OFF
ON
OFF
ON
55
ON
ON
OFF
ON
60
N/A
NA/
ON
ON
Table 3: Pre-discharge Delay
Note
This is not compliant with EN54-2 or
EN12094-1 and is provided for commission-
ing purposes only.
