EQUIPMENT: FIRECLASS Prescient III WRITTEN BY: RKP
PUBLICATION: OMFCPRES3IN CHECKED BY: AP
ISSUE No. & DATE: 0 02/02/12
PAGE 9 of 43
3.6 Repeater Outputs (Z1, Z2, AUX,
MR, OUTPUTS 1, 2, 3, 4, 5)
Each repeater output consists of an Open Collector
transistor driver capable of sinking up to 50mA. The
following outputs are provided:
Z1 – Zone 1 Fire
Z2 – Zone 2 Fire
AUX – Auxiliary Zone Fire
MR – Manual Release Activated
OUTPUT 1 – Emergency Hold Activated
(configurable for auto & manual mode)
OUTPUT 2 – Emergency Abort Activated
(configurable for manual only mode)
OUTPUT 3 – Actuators (Extinguishing) Disabled
OUTPUT 4 – Isolation Valve Closed
OUTPUT 5 – Isolation Valve Abnormal
3.7 Auxiliary 24VDC Supply
The panel provides two auxiliary 24Vdc power
supply outputs for connection to ancillary
equipment:
1. (AUX 250mA: 24V, 0V) – This output is rated
at 250mA (electronically fused), 24 Volts D.C.
2. (AUX 1A: 24V, 0V) – This output is rated at 1A
(electronically fused), 24 Volts D.C.
3.8 Status Lamp Unit
The panel communicates with the Status Lamp
Units (SLU) via two-wire RS485 serial data. The
following indications can be provided, dependent on
SLU type:
1. Emergency Abort Activated
2. Emergency Hold Activated
3. Gas Released
4. Auto & Manual
5. Manual Only
6. Extinguishing Disabled
7. Local Fault
8. Seconds Remaining to Discharge (fully
functional SLU only)
The SLU can provide the following controls,
dependent on SLU type:
1. Manual Release
2. Emergency Abort
3. Emergency Hold
4. Auto & Manual / Manual Only
The controls on the SLU can be transmitted via the
serial data link or hard-wired via conventional
circuits on the panel (see 3.9 below).
3.9 Remote Inputs
3.9.1. Remote Controls
This is a fully monitored input, providing: open &
short circuit fault monitoring, Silence Alarms, Re-
sound Alarms and Panel Reset. The EOL device
is a 10k resistor.
3.9.2. Remote Sound Alarms:
Non-latching.
4k7 = activate general sounders.
When activated – steady „Remote Sound
Alarms‟ indication and continuous operation of
general sounders.
When deactivated – „Remote Sound Alarms‟
indication clears and general sounders stop.
3.9.3. Remote Silence Alarms:
Single Operation.
1k8 = silence active sounders (silencing of
extinguishing sounders is inhibited until the
Discharged condition is active)
When activated – same operation as pressing
the Silence Alarms button.
When deactivated – no action
3.9.4. Remote Reset:
Single Operation.
560R = Reset Fire System & Extinguishing
System (reset of the extinguishing system can
be inhibited until the inhibit timer ends or Abort
is operated)
When activated – Resets all indications on the
Fire Alarm section of the panel. Only resets the
indications on the Extinguishing section of the
panel if the Reset Inhibit is inactive.
When deactivated – no action
3.9.5. Gas Trapped
This is a fully monitored input, providing open &
short circuit fault monitoring. The EOL device is a
10k resistor, activated by a 680R resistor.
Activation illuminates the GAS TRAPPED IN
MANIFOLD LED and raises the general fault
condition.
3.9.6. Auto/Manual Lock-Off Switch
(AUTO/MANUAL)
The Auto/Manual input is fully monitored for open
& short circuit faults. The End-Of-Line device is a
10k resistor, activated by a 4k7 resistor. In the
active state the panel is placed in Manual Only
mode and the yellow Manual Only LED on the
display board pulses. Operation of the
Auto/Manual button on the display board has no
effect while the input is active. The input allows for
the connection of Auto/Manual Lock-Off switches
on SLUs. Door Lock switches may also be
connected via terminals on the SLUs. The total
number of Auto/Manual switches & Door Lock
switches that can be connected is 14. This allows
for 7 SLUs, each with an auto/manual Keyswitch
and a door lock switch fitted. See the SLU
installation manual for more details.
3.9.7. Low Pressure Fault (GAS LOW)
This is a fully monitored input, providing open &
short circuit fault monitoring. The EOL device is a
10k resistor, activated by a 680R resistor.
Activation illuminates the GAS LOW LED and
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