FireClass Prescient III Guide

Application, Installation & Commissioning
120.515.161_FC-P-PRESCIENT3-I-NL
Doc. version 2
24. February 2014
Conventional Fire
Detection & Gas
Extinguishing
Control Panel
FIRECLASS Prescient III

© FIRECLASS. Hillcrest Business Park, Dudley, West Midlands, DY2 9AP, UK, 2014
Contents subject to change without notice.
All rights to this documentation, including the contents of the online help, are reserved, in particular but not limited to the
rights of copying, distribution and translation.
No portion of this documentation, including the online help, may be reproduced, edited, copied or distributed in any form
without prior written authorization from FIRECLASS. Use of the data medium provided with this product is restricted to cop-
ying the software for the purpose of data backup only.

FIRECLASS Prescient III Contents
Application, Installation & Commissioning Doc. version 2 3
Contents
1 Guide through this manual................................................................................7
1.1 Keywords and symbols .................................................................................................. 7
1.2 Who this guide is for ......................................................................................................7
2 Overview & General Description.......................................................................8
2.1 Introduction ................................................................................................................... 8
2.2 General Description ....................................................................................................... 8
2.2.1 Alternative Language Inserts .....................................................................................................................9
2.3 Panel & Accessories - Order Codes.............................................................................. 10
3 Functional Description ....................................................................................14
3.1 Detection Zones (ZONE 1, ZONE 2 & AUX ZONE......................................................... 14
3.2 Manual Release Facility (MR & Panel Mounted Call Point) .......................................... 14
3.3 General Alarm Circuits (SNDR1 & SNDR2) .................................................................. 14
3.4 Extinguishing Alarm Circuit (EXT SNDR) ..................................................................... 14
3.5 Actuator Circuits (ACT1 & ACT2) ................................................................................ 15
3.6 Repeater Outputs (Z1, Z2, AUX, MR, OUTPUTS 1, 2, 3, 4, 5)....................................... 15
3.7 Auxiliary 24 V DC Supply.............................................................................................15
3.8 Status Lamp Unit ......................................................................................................... 15
3.9 Remote Inputs .............................................................................................................. 15
3.9.1 Remote Controls......................................................................................................................................15
3.9.2 Gas Trapped (GAS TRAPPED) .................................................................................................................16
3.9.3 Auto/Manual Lock-Off Switch (AUTO/MANUAL) ....................................................................................16
3.9.4 Low Pressure Fault (GAS LOW) ..............................................................................................................16
3.9.5 Extinguishing Isolation Valve Status (ISO. VALVE) ..................................................................................16
3.9.6 Gas Released Pressure Switch (GAS REL.).............................................................................................16
3.9.7 Emergency Hold (HOLD) .........................................................................................................................16
3.9.8 Emergency Abort Input (ABORT).............................................................................................................17
3.10 Relay Contacts ............................................................................................................. 17
3.10.1 First Stage Shutdown (1ST STAGE).........................................................................................................17
3.10.2 Second Stage Shutdown (2ND STAGE)...................................................................................................17
3.10.3 Third Stage Shutdown (3RD STAGE).......................................................................................................17
3.10.4 Gas Discharged (GAS REL SIG) ...............................................................................................................18
3.10.5 Fire Signal (FIRE SIG)...............................................................................................................................18
3.10.6 Fault Signal (FAULT SIG)..........................................................................................................................18
3.10.7 Auxiliary Reset (RESET) ...........................................................................................................................18
3.11 Internal Standby Batteries ........................................................................................... 18
3.12 Function Enable/Disable Switches ............................................................................... 18
3.12.1 Function Select Switch ............................................................................................................................18
3.12.2 Link For Earth Fault Monitoring ...............................................................................................................21
3.13 Fault LEDs .................................................................................................................... 21
3.14 Internal Buzzer .............................................................................................................22
3.15 Display Board - General................................................................................................ 22
3.16 Display Board - Status Brand Indications.....................................................................23
3.16.1 BRAND (FIRE)..........................................................................................................................................23
3.16.2 DOORMELDING BRAND (FIRE SIGNAL) ................................................................................................23
3.16.3 GROEP 1 (ZONE 1) ..................................................................................................................................23
3.16.4 GROEP 2 (ZONE 2) ..................................................................................................................................23
3.16.5 EXTERNE GROEP (AUX ZONE) ...............................................................................................................23
3.16.6 EXTERNE ALARM INPUT (REMOTE SOUND ALARMS) ........................................................................23
3.16.7 SIGNAALGEVERS; STORING/UIT (FIRE SOUNDER FAULT/DISABLED) ................................................23
3.17 Display Board - System Status Indications ..................................................................23
3.17.1 IN BEDRIJF (POWER SUPPLY ON) .........................................................................................................23

4 Application, Installation & Commissioning Doc. version 2
Contents FIRECLASS Prescient III
3.17.2 ALGEMEEN STORING (GENERAL FAULT) .............................................................................................23
3.17.3 VOEDING STORING (POWER SUPPLY FAULT)......................................................................................23
3.17.4 SYSTEEM STORING (SYSTEM FAULT)...................................................................................................23
3.17.5 AARD FOUT (EARTH FAULT) ..................................................................................................................24
3.17.6 ZEKERING DEFECT (FUSE FAILED) ........................................................................................................24
3.17.7 DOORM. STORING; STORING/UIT (FAULT SIGNAL FAULT/DISABLED) ...............................................24
3.17.8 SIGNAALGEVER TEST (SOUNDER TEST)...............................................................................................24
3.18 Display Board - Status Blussing Indications ................................................................ 24
3.18.1 AUTOMATISCH & HANDBEDIENING (AUTO & MANUAL) ....................................................................24
3.18.2 HANDBEDIENING (MANUAL ONLY) ......................................................................................................24
3.18.3 HANDACTIVERING (MANUAL RELEASE ACTIVE)..................................................................................24
3.18.4 SYSTEEM AKTIEF (SYSTEEM ACTIVATED) ............................................................................................24
3.18.5 BLUSSING AKTIEF (GAS RELEASED) .....................................................................................................24
3.18.6 DOORMELDING BLUSSING (GAS RELEASED SIGNAL ACTIVE) ...........................................................24
3.18.7 BLUSSING GEBLOKKEERD (EMERGENCY ABORT ACTIVE) .................................................................24
3.18.8 UITSTEL BLUSSING (EMERGENCY HOLD ACTIVE) ...............................................................................24
3.18.9 BLUSSTURING STORING (CIRCUIT FAULT)...........................................................................................24
3.18.10 LAGE DRUK GASCILLINDERS (GAS LOW).............................................................................................25
3.18.11 HOGE DRUK VERZAMELLEIDING (GAS TRAPPED IN MANIFOLD) ......................................................25
3.18.12 AFSLUITER ONJUIST (ISOLATION VALVE ABNORMAL).......................................................................25
3.18.13 AFSLUITER DICHT (ISOLATION VALVE CLOSED) .................................................................................25
3.18.14 HANDACTIVERING; STORING/UIT (MANUAL RELEASE FAULT/DISABLED) ........................................25
3.18.15 BLUSSING UIT (EXTINGUISHING DISABLED) ........................................................................................25
3.18.16 DOORM. BLUSSING; STORING/UIT (GAS RELEASED SIGNAL DISABLED) .........................................25
3.18.17 ALGEMENE STURINGEN (SHUTDOWN OUTPUTS DISABLED) ............................................................25
3.18.18 BLUSVERTRAGING (SECONDS TO DISCHARGE) ..................................................................................25
3.19 Display Board - Bediening ............................................................................................ 25
3.19.1 SIGNAALGEVERS UIT (SILENCE ALARMS)............................................................................................25
3.19.2 SIGNAALGEVERS AAN (RESOUND ALARMS) .......................................................................................25
3.19.3 HERSTEL BRANDALARM (FIRE RESET).................................................................................................26
3.19.4 HERSTEL BLUSSING (EXTINGUISHING RESET) ....................................................................................26
3.19.5 ZOEMER UIT (SILENCE BUZZER) ...........................................................................................................26
3.19.6 AUTO & HAND / ALLEEN HAND (AUTO & MANUAL / MANUAL ONLY) ...............................................26
3.19.7 SELECTEER AAN/UIT (SELECTEER AAN/UIT) ........................................................................................26
3.19.8 INSCHAKELEN (ENABLE)........................................................................................................................26
3.19.9 UIT SCHAKELEN (DISABLE)....................................................................................................................26
3.19.10 TEST ........................................................................................................................................................26
3.19.11 SELECT (SCROLL) ...................................................................................................................................26
4 Panel Operation...............................................................................................27
4.1 Circuit Configuration Options...................................................................................... 27
4.2 Circuit Select Cursor.................................................................................................... 27
4.2.1 Disable, Re-enable, Test ..........................................................................................................................27
4.2.2 Configure I.S. Zones ................................................................................................................................28
4.2.3 Configure SLU (Status Lamp Units).........................................................................................................28
4.3 Panel Quiescent State.................................................................................................. 29
4.4 Auxiliary Fire Condition ...............................................................................................29
4.5 Single Extinguishing Zone Fire Condition.................................................................... 29
4.5.1 MANUAL ONLY MODE...........................................................................................................................29
4.5.2 AUTOMATIC & MANUAL MODE............................................................................................................29
4.6 Two Extinguishing Zones Fire Condition ..................................................................... 29
4.6.1 Manual Only Mode ..................................................................................................................................29
4.6.2 Automatic & Manual Mode......................................................................................................................29
4.7 Manual Release Condition............................................................................................ 30
4.8 Activated Condition ..................................................................................................... 30
4.8.1 Emergency Hold Operation .....................................................................................................................30
4.8.2 Emergency Abort Operation ....................................................................................................................30

FIRECLASS Prescient III Contents
Application, Installation & Commissioning Doc. version 2 5
5 Specifications & Detector Compatibility ........................................................31
5.1 Technical Specifications .............................................................................................. 31
5.2 Standby Battery Requirements .................................................................................... 32
5.2.1 Battery Capacity Calculation ....................................................................................................................32
5.2.2 Battery Replacement ...............................................................................................................................32
5.2.3 Battery Charging ......................................................................................................................................32
5.3 Mechanical, Electrical and Environmental Specification............................................. 34
5.4 Detector Compatibility................................................................................................. 36
6 Panel Installation & Commissioning ...............................................................43
6.1 Cable Recommendations.............................................................................................. 44
6.2 Installation Procedure.................................................................................................. 44
6.3 Commissioning Procedure ........................................................................................... 45
7 System Maintenance .......................................................................................49
7.1 Overview ...................................................................................................................... 49
7.2 Weekly Test Routine..................................................................................................... 49
7.3 Battery Replacement .................................................................................................... 49
8 Relay, Wiring Diagrams & Additional Info. .....................................................51
8.1 Control Board Layout Diagram..................................................................................... 51
8.2 Panel Exploded View.................................................................................................... 52
8.3 Connection Diagrams................................................................................................... 53
8.3.1 Zone Circuits............................................................................................................................................53
8.3.2 Sounders and Actuators ..........................................................................................................................54
8.3.3 Monitored Inputs .....................................................................................................................................55
8.3.4 Monitored Outputs ..................................................................................................................................56
8.3.5 Remote Outputs and SLU Communication .............................................................................................57
8.4 Glossary ....................................................................................................................... 57
8.5 Construction Products Regulation ............................................................................... 58

6 Application, Installation & Commissioning Doc. version 2
Contents FIRECLASS Prescient III

FIRECLASS Prescient III 1 Guide through this manual
Application, Installation & Commissioning Doc. version 2 7
1 Guide through this manual
1.1 Keywords and symbols
This documentation uses special notations that you can
use for better orientation. Symbols in the margins indi-
cate warnings, infos or instructions. You find an expla-
nation of these symbols in Table 1.
1.2 Who this guide is for
This guide is aimed at technicians who have to install a
FIRECLASS Prescient III Fire detection system. They
should already have been given training.
Keyword Symbol Explanation
DANGER Warning.
Imminent danger.
Death or severe injury
when disregarded.
WARNING Warning.
Potentially dangerous situ-
ation.
Death or severe injury pos-
sible when disregarded.
CAUTION Warning.
Potentially dangerous situ-
ation.
Minor injury possible
when disregarded.
NOTICE Warning.
Potentially dangerous
situation.
Material damage possible
when disregarded.
Helpful information.
Table 1: Keywords and symbols in this documentation

8 Application, Installation & Commissioning Doc. version 2
2 Overview & General Description FIRECLASS Prescient III
2 Overview & General Description
2.1 Introduction
The FIRECLASS Prescient III Gas Extinguishing
Control Panel is a stand-alone panel intended for use
with gas extinguishing systems. It has been designed
and approved to the European Standard EN 12094-
1:2003, as well as the relevant parts of EN54-2:1997 &
EN54-4:1997. The FIRECLASS Prescient III panel also
incorporates the relevant recommendations of the Brit-
ish Code of Practice BS7273-1:2000.
The FIRECLASS Prescient III is fully compliant with the
mandatory requirements of EN54-2 and 4 along with the
following options with requirements:
1EN54-2:1997 Clause 7.8 Outputs to fire alarm
devices (sounders).
2EN54-2:1997 Clause 7.9 Outputs to fire alarm
routing equipment.
3EN54-2:1997 Clause 8.9 Output to fault warning
routing equipment.
4EN54-2:1997 Clause 10 Test condition.
The FIRECLASS Prescient III provides the following
compulsory functions of BSEN 12094-1:2003 as listed
in clause 4.3.2:
1 a) Reception & processing of at least one input trig-
gering signal from an f.d.a.s. (Fire detection Zones 1
& 2) and an input triggering signal from manual trig-
gering device(s) connected directly to the e.c.d.
(Manual Release input).
2 b) Transmission of the extinguishing signal (Actuator
circuits 1 & 2)
3 c) Activation of Alarm devices (Extinguishing
Sounder circuit)
4 d) Indication of each condition unambiguously (LEDs
& internal buzzer).
5 e) Transmission of the information of the incorrect
status of components and of the information of the
fault warning condition (Fault Signal Output).
6 f) Transmission of the information of the released
condition (Gas Released Output)
The FIRECLASS Prescient III provides the following
optional functions of BSEN 12094-1:2003 as listed in
clause 4.3.2:
1 g) Extinguishing system delay.
2 h) Reception of a signal representing the flow of
extinguishing agent (Discharged).
3 i) Monitoring of status of components:
– Low pressure/low weight
4 j) Reception of signal from an emergency hold
device.
5 k) Separate monitoring of the status of non-electrical
disable device(s) (Isolation valve).
6 n) Input from auto/manual selector switches.
7 o) Transmission of a triggering signal to equipment
within the fire extinguishing system:
b) Optical warning devices (Status indicators).
8 p) Transmission of signals to equipment outside the
fire extinguishing system (Shut downs).
9 r) Reception of signal from an emergency abort
device.
10 u) Activation of alarm devices with different signals.
(2-stage sounders).
The Environmental Class as defined by clause 4.2 is:
Class A: temperature range -5 to +40 Deg C.
The FIRECLASS Prescient III is fully compliant with the
relevant recommendations of BS 7273-1:2000. The fol-
lowing safety critical aspects have been addressed:
16.1.2 Avoidance of accidental discharge.
26.4.3 A single short circuit in connections shall not
cause an extinguishant release.
36.4.4 Protection against over voltages which could
cause an extinguishant release.
The FIRECLASS Prescient III integrates the functions of
a fire alarm system and a gas extinguishing system. The
FIRECLASS Prescient III monitors one extinguishing
area and one non-extinguishing area for fire conditions
and gives an appropriate audible and visual indication.
Zones 1 & 2 are used for coincident detection in the
extinguishing area and can be used to automatically
release the extinguishing gas. The Auxiliary zone only
provides an alarm indication. The FIRECLASS Prescient
III also provides a facility for initiating the release of
extinguishing gas manually.
The FIRECLASS Prescient III incorporates with a 5 Amp
switch-mode power supply with Power Factor correc-
tion.
2.2 General Description
The FIRECLASS Prescient III is housed in a metal enclo-
sure with a Manual Release facility mounted on the
door.
The following functions are available on the front of the
panel:
1 Visual Indication of panel status via LEDs:
2 Numerical Display for the Extinguishant Release
Timer.
3 Buttons for User Control.
4 Manual Extinguishant Release unit
The following functions are available inside the panel:
1 Three fully monitored Detection circuits.
2 One fully monitored Manual Release circuit.
3 Two fully monitored General Sounder circuits.
4 One fully monitored Extinguishing Sounder circuit.

FIRECLASS Prescient III 2.2 General Description
Application, Installation & Commissioning Doc. version 2 9
5 Two fully monitored Actuator circuits.
6 Repeater outputs for:
– Zone 1 Fire Detected
– Zone 2 Fire Detected
– Auxiliary Zone Fire Detected
– Manual Release Activated
– System Disabled
– Isolation Valve Closed
– Isolation Valve Abnormal
– Emergency Hold Activated (configurable for auto
& manual mode)
– Emergency Abort Activated (configurable for
manual only mode)
7 Two Auxiliary 24 V DC supply outputs.
8 RS485 communication link to drive external Status
Lamp Units.
9 Fully monitored inputs for:
– Gas Discharged Pressure Switch
– Gas Low Pressure Switch
– Gas Isolation Valve
– Gas Trapped In Manifold
– Emergency Hold Switch
– Emergency Abort Switch
– Manual Only (Lock-Off) Switch
– Remote Controls Switches (Sound alarms,
Silence Alarms, Reset)
10 Fully Monitored Outputs (Configurable for Volt-Free
operation) for:
– First Stage Shutdown
– Second Stage Shutdown
– Third Stage Shutdown
– Auxiliary Fire Signal
– Auxiliary Fault Signal
– Gas Released Signal
11 Volt-Free Relay Contacts for Auxiliary Equipment
Reset
12 Terminals for Internal Standby Batteries
13 Site Configuration DIL Switches
14 Fault indication LEDs
15 Internal Buzzer
2.2.1 Alternative Language Inserts
The panel is available in a variety of languages but it is
also possible for the installer to print inserts with their
chosen language.
A template document in English is available on the prod-
uct CDROM. This can be edited and printed on to a grey
card as detailed in the template document.
The inserts can then be cut out and inserted into the dis-
play board.
Notes:
1 Zone Location inserts are supplied blank and are
therefore not included in the template.
2 DO NOT remove or alter the Model Name/Number
or approvals information.

10 Application, Installation & Commissioning Doc. version 2
2.3 Panel & Accessories - Order Codes FIRECLASS Prescient III
2.3 Panel & Accessories -
Order Codes
Fig. 1: Enclosure Dimensions
370.00 mm
325.00 mm 126.00 mm
4.00 mm
STATUS BRAND
SYSTEEM STATUS
BEDIENING STATUS BLUSSING
BRAND
DOORMELDING BRAND
GROEP 1
GROEP 2
EXTERNE GROEP
EXTERNE ALARM INPUT
STORING EXTERNE INPUT
SIGNAALGEVERS; STORING/UIT
IN BEDRIJF
ALGEMEEN STORING
VOEDING STORING
SYSTEEM STORING
AARD FOUT
ZEKERING DEFECT
DOOR M. STORING; STOR ING/UIT
SIGNAALGEVER TEST
AUTOMATISCH& HANDBEDIENING
HANDBEDIENING
HANDACTIVERING
SYSTEEM AKTIEF
BLUSSING AKTIEF
DOORMELDING BLUSSING
BLUSSING GEBLOKKEERD
UITSTEL BLUSSING
BLUSSTURING STORING
LAGE DRUK GASCILLINDERS
HOGE DRUK VERZAMELLEIDING
AFSLUITER ONJUIST
AFSLUITER DICHT
HANDACTIVERING; STORING/UIT
BLUSSING UIT
DOORM. BLUSSING; STORING/UIT
ALGEMENE STURINGEN UIT
BLUSVER-
TRAGING
SIGNAAL
GEVERS
UIT
HERSTEL
BRAND-
ALARM
ZOEMER
UIT
SELECTEER
AAN/UIT
SELECT
UIT
BEDIENING
AAN
TEST
UITSCHAK-
ELEN
INSCHAK-
ELEN
AUTO & HAND/
ALLEEN HAND
HERSTEL
BLUSSING
(GEBLOKKEERD)
SIGNAAL
GEVERS
AAN
Part Number Description
508.033.751.NL FIRECLASS Prescient III Panel - Dutch Inserts
508.033.752.NL FIRECLASS Prescient III Indication Only Status Lamp Unit - Dutch/Czech Inserts
508.033.753.NL FIRECLASS Prescient III Basic Controls Status Lamp Unit - Dutch/Czech Inserts
508.033.754.NL FIRECLASS Prescient III Full Controls Status Lamp Unit - Dutch/Czech Inserts
508.033.755.NL FIRECLASS Prescient III Weatherproof Status Lamp Unit - Dutch/Czech Inserts
Table 2: Panel & Accessories - Order Codes

FIRECLASS Prescient III 2.3 Panel & Accessories - Order Codes
Application, Installation & Commissioning Doc. version 2 11
Fig. 2: Motherboard Terminal Identification Part 1
ZONE CIRCUITS
+
-+-+-+-
12AUX
MR GAS
REL. GAS
LOW ISO.
VALVE GAS
TRAPPED
Z1 Z2 AUX MR 12345
OUTPUTS
HOLD ABORT
REMOTE
CTRLS
AUTO/
MANUAL
RepeatOutput– Isolation Valve Abnormal
RepeatOutput– Isolation Valve Closed
RepeatOutput– System Disabled
Repeat Output– Emergency Abort Activated
(Panelin Manual – DIL SW Selectable)
Repeat Output– Emergency Hold Activated
(Panel in Auto – DIL SW Selectable)
RepeatOutput– ManualRelease Activated
Repeat Output – Auxiliary Zone Fire
RepeatOutput– Zone2 Fire
RepeatOutput– Zone1 Fire
Status Input – Gas Trapped in Manifold
10KEOL, 680R Activation
Status Input – Isolation Valve Status
10KAbnormal, 2K2 = Open, 680R = Closed
Status Input – Gas Low
10KEOL, 680R = Gas Low
(DIL SW configurable for Normallyclosed
operation)
Status Input – Gas Released Pressure Switch
10K EOL, 680R = Activated
ManualRelease Input
21VDC, 10K EOL, 680R = Activated
(DIL SW configurable for 3K9 EOL)
Auxiliary Zone Input
21VDC, 22uF EOL, 680R = Activated
Detectors & Call-points allowed
(DIL SW configurable for 3K9 EOL)
Detector Zone 2 Input– Protected Area Zone
21VDC,22uF EOL,680R = Activated
Fire Detectors only
(DIL SW configurable for 3K9 EOL)
Detector Zone 1 Input– Protected Area Zone
21VDC, 22uF EOL,680R = Activated
Fire Detectors only
(DIL SW configurable for 3K9 EOL)
Input – EmergencyHold Switch
10K EOL, 680R = Activated
Input – EmergencyAbortSwitch
10K EOL, 680R = Activated
Input
Auto/ManualMode SelectSwitch
10KEOL, 4K7 =ManualOnlyMode
Remote Control Input
10KEOL, 4K7 =Sound Alarms
1K8 = Silence Alarms
560R = Reset System

12 Application, Installation & Commissioning Doc. version 2
2.3 Panel & Accessories - Order Codes FIRECLASS Prescient III
Fig. 3: Motherboard Terminal Identification Part 2
24V 0V
AUX
250mA
AB
S.L.U. +-+-+-+-+-
SNDR1 SNDR2 EXT.
SNDR ACT1 ACT2
C/+ P O/
-
C/+ P O/
-
O/+ P C/
-
C/+ P O/
-
C/+ P O/
-
C/+ P O/
-
GAS REL SIG FIRE SIG FAULT SIG
CPO
RESET
3RD STAGE2ND STAGE1ST STAGE
ResetRelay- Volt-FreeTerminals:
C = Normally Closed
P = Pole
O =NormallyOpen
Fault Relay - Volt-Free or Powered
Terminals:
C/+ = Normally Closed or 24V out
P = Pole
O/-= Normally Open or 0V out
Fire Relay - Volt-Free or Powered
Terminals:
C/+ = Normally Closed or 24V out
P = Pole
O/-= Normally Open or 0V out
Gas Released Relay - Volt-Free or Powered
Terminals:
C/+ = Normally Closed or 24V out
P = Pole
O/-= Normally Open or 0V out
Actuator Circuit 2
+= 1.2Vin quiescent,24V when activated
- = 3.8Vin quiescent, 0V when activated
Actuator Circuit 1
+= 1.2Vin quiescent,24V when activated
- = 3.8Vin quiescent, 0V when activated
Extinguishing Sounder Circuit
+= 1.2Vin quiescent,24V when activated
- = 3.8Vin quiescent, 0V when activated
Fire Sounder Circuit 2
+= 1.2Vin quiescent,24V when activated
- = 3.8Vin quiescent, 0V when activated
Fire Sounder Circuit 1
+= 1.2Vin quiescent,24V when activated
- = 3.8Vin quiescent, 0V when activated
SLU 2-Wire RS485 Data Connection
ConnectA atpanelto Aat SLU
ConnectB at panelto Bat SLU
1 Amp 24V DC Power Supply Output
Primarily for use with SLUs
250mA 24V DC Power Supply Output
Primarily for use with Repeat Outputs
Third Stage Relay
Volt-Free or Powered Terminals:
C/+ = Normally Closed or 24Vout
P = Pole
O/- =Normally Open or 0V out
Second Stage Relay
Volt-Free or Powered Terminals:
C/+ = Normally Closed or 24Vout
P = Pole
O/- =Normally Open or 0V out
FirstStage Relay
Volt-Free or Powered Terminals:
C/+ = Normally Closed or 24Vout
P = Pole
O/- =Normally Open or 0V out
24V 0V
AUX
1A

FIRECLASS Prescient III 2.3 Panel & Accessories - Order Codes
Application, Installation & Commissioning Doc. version 2 13
Fig. 4: FIRECLASS Prescient III Block Schematic Diagram
Groep 1
Groep 2
Externe Groep
Blussing
Aktief
Lage Druk
Gascillinders
Afsluiter
Onjuist
Afsluiter
Dicht
Act 1**
Act 2**
Gen Sndr 1**
Gen Sndr 2**
Ext Sndr**
Gas Released
[Routing]**
Gas Released [SLU]
Gas Manual [SLU]
Gas Auto [SLU]
1st stage Plant
Shutdown **
Fire Sig
[Routing]**
Fault Sig
[Routing]**
Timer Hold [SLU]
Release Aborted [SLU]
+24V AUX 1A Output
2nd stage Plant
Shutdown **
Aux Reset
Double knock
detection
zones
Aux detetection
zone
Panel
Manual
Release
Gas discharged
pressure switch.
Gas Low
[Low pressure
switch/low weight]
[Valve Closed]
[See valve
wiring diag]
Gas isolation
valve.
[Valve Stuck]
Brand
Groep 1
Storing/
Uit
Groep 1
Brand
Groep 2
Storing/
Uit
Groep 2
Brand
Externe
Groep
Storing/Uit
Externe
Groep
Blussing
Aktief Fault
Lage Druk
Gascillinders
* = Open & short cct flt
monitored I/P
*
*
*
Open & short cct flt monitored
I/P. 680 Ohm = Ext Low
Open & short cct flt
monitored I/P.
680Ohms = V/Closed
2K2 = V/Abnormal
Signaal-
gever
Test
Signaal-
gevers
Storing/Uit
Sndr 1
flt Sndr 2 flt
Internal
Act 1 flt Act 2 flt
Internal Blussing Uit
Aux DC Supply Max O/P
1A Fused
Active on any fire Z1 or Z2
in auto, Man Rel or Gas
Released P/S signal
Pulsed on Z1/Z2 Double Knock
in auto, Pulsed on Manual
Release. Pulsed when
Discharge Timer Held.
Continuous on actuator
activation or Discharge P/S I/P
signal active.
Max O/P: 0.5A
** = Open & short
circuit monitored
output
Active on coincidence fire on
Z1 and Z2 in auto, Man Rel
or Gas Released P/S signal
Doormelding
Brand Fault/
Disabled
Doorm. Storing
Storing/Uit
Algemene
Sturingen Uit
Doormelding
BlussingDisabled
Operating on any fire
Z1,Z2,Aux Zone
Link configurable O/Ps:
Link ON:
Open/short cct fault
monitored, powered at
24 VDC when active.
Link OFF:
1 x Volt-Free Change-
over relay contact
[Rated 1 Amp @ 24VDC] Operating [de-energising]
on any fault including
Valve Abnormal but not
Valve Closed
Operating on Gas P/S
active I/P or Actuator
operated when in "No
Discharge P/S" mode
Open collector O/Ps
each rated 50 mA
1 x V/F C/O relay contact
[Rated 1 Amp @ 24VDC] Operating for 10 seconds
after operation of Fire Reset
switch
*
*
*
3rd stage Plant
Shutdown ** Active on Actuators operated
(if no Discharged Pressure
Switch) or Gas Released P/S
signal
Each Plant Shutdown O/P has:
1 x O/P link configurable as fault monitored/powered
when active [as per fire routing O/P] or 1 x V/F C/O
relay contact rated 1 Amp @ 24 VDC.
S/D
O/P
1 flt
Internal
S/D
O/P
2 flt
S/D
O/P
3 flt
Gas Trapped
Pressure
Switch
Hoge Druk
Verzamelleiding
+24V AUX 250mA Output
Max O/P 0.25A [Fused]
Internal
Ext Sndr Fault
Release Disabled [SLU]
RP - E/Hold Active
or Panel in Auto
RP - E/Abort Active
or Panel in Manual
RP - Isol Valve Closed
RP - Isol Valve Abnormal
RP – System Disabled
Internal
Fault
Internal
Auto &
Hand-
bediening Hand-
bediening Fault
Internal
Blussing
Geblokkeerd Fault
Internal
Uitstel
Blussing Fault
Internal
Afsluiter
Onjuist Afsluiter Dicht Fault
Internal
Hoge Druk
Verzamelleiding Fault
Internal
0V AUX 1A Output
Release Count Down[SLU]
RS485 serial
data [SLU]
To Status
Indicator/
Controller
SLU
Fault
Internal
Hand-
activering
Man
Rel
Fault/
Disabled
Internal
Gas Rel Sig
[Routing] Fault
Conventional
Manual Release
Zone Handactivering
Conventional
E Hold input
Uitstel
Blussing
Conventional
Abort input
Blussing
Geblokkeerd
*
*
*
*
Conventional
Auto/Manual
switch input
Auto/
Handbediening
Lock Off
*
RCI
Remote Controls Input:
4K7 = Sound Alarms
1K8 = Silence Alarms
560R = Reset Panel
Externe
Alarm
Input Storing
Externe
Input
*
RP - Fire Z1
RP - Fire Z2
RP - Fire Aux Zone
RP – Manual Release Operated
DILSwitch
Selectable
Continuousonfire Z1,Z2,AuxZone,
RemoteSoundAlarm
Max O/P: 0.5A
Operating on pre discharge timer
Ended or Man Rel in Immediate
mode
Max O/P:1 Amp
Internal
Fault
Panel
MR
Internal
Fault
External
MR
Herstel
Blussing
Geblokkeerd
Illuminates steady
while Extinguishing
Reset is Inhibited

14 Application, Installation & Commissioning Doc. version 2
3 Functional Description FIRECLASS Prescient III
3 Functional Description
3.1 Detection Zones (ZONE 1,
ZONE 2 & AUX ZONE
Three detection zone circuits are provided. They are
monitored for Open Circuit Fault, Short Circuit Fault and
Alarm (Fire). The End-Of-Line device is usually a 22 uF
capacitor (or 10 kΩ resistor if set to Intrinsically safe
mode) but can be configured for 3.9 kΩ resistor via a
DIL switch on the motherboard.
A maximum of 32 devices may be connected on each
zone (the actual number is dependent on the type of
detector used, see section 5.4).
Manual Call Points may only be connected to the aux.
zone.
In Automatic mode, zones 1 and 2 are normally used
together to produce First Stage (pre-activated) and Sec-
ond Stage (activated) fire alarms, resulting in automatic
extinguishant discharge ("Double Knock" Zones).
The auxiliary detection zone only provides a general fire
indication.
Operation of Fire Reset causes the power supply to all
three zones to be disconnected for 4 seconds to reset
any activated detectors.
The Display Board has Fire and Fault LEDs for each of
the zones.
The Display Board also provides User Controls for disa-
bling the monitoring of individual zones.
3.2 Manual Release Facility
(MR & Panel Mounted Call
Point)
Two circuits are provided for operating the Manual
Release facility.
1 The fourth zone circuit is a Manual Release circuit. It
is monitored for Open Circuit Fault, Short Circuit
Fault and Alarm. The End-Of-Line device is usually a
10 kΩ resistor but can be configured for 3.9 kΩ resis-
tor via a DIL switch on the motherboard.
It gives a Second Stage alarm in both automatic and
manual modes, and initiates the Extinguishant
release sequence when activated.
This circuit must only have manually operated
devices connected to it e.g. Manual Call Points. The
power supply to this circuit is not switched off during
panel Reset.
2 A Manual Release Call Point is mounted on the door
of the panel and is monitored by a separate circuit for
open & short circuit faults. The connection for the
call point is on the rear of the display board.
The Display Board has Activated and Fault LEDs for the
Manual Release facility, common to both circuits. Indi-
vidual fault LEDs are provided on the motherboard
inside the panel.
The Manual Release facility can be disabled, resulting in
both circuits being disabled.
3.3 General Alarm Circuits
(SNDR1 & SNDR2)
Two fully monitored general alarm circuits are provided.
They are monitored for Open Circuit and Short Circuit
faults. They are rated at 0.5 A (electronically fused),
28 V DC each. The End-Of-Line device is a 10 kΩ resis-
tor (3.9 kΩ can also be used).
The SIGNAALGEVERS; STORING/UIT LED on the dis-
play flashes for any fault conditions on the General
Alarm Circuits. Individual fault LEDs are provided on the
motherboard inside the panel. Both circuits can be disa-
bled as a group.
SNDR1 is inhibited if the EXT SNDR circuit is activated.
This is to enable the use of the Fulleon ROSHNI multi-
tone sounder. See section 8.3.2.
Note: The circuits are reverse-polarity monitored. The
PCB terminals are marked for the active polarity. Ensure
that all connected devices are polarised. See section
8.3.2.
3.4 Extinguishing Alarm
Circuit (EXT SNDR)
One fully monitored extinguishing alarm circuit is pro-
vided, monitored for Open Circuit and Short Circuit
faults. It is rated at 0.5 A (electronically fused), 28 V DC.
The End-Of-Line device is a 10 kΩ resistor (3.9 kΩ can
also be used).
The Blussturing Storing LED on the display
flashes for any fault condition on the Extinguishing
Alarm Circuit, with an individual fault LED on the moth-
erboard inside the panel. The circuit can be disabled by
disabling the extinguishing system (the Actuators are
also disabled at the same time).
Note: The circuit is reverse-polarity monitored. The PCB
terminals are marked for the active polarity. Ensure that
all connected devices are polarised. See section 8.3.2.
Note
Please refer to 8.1 for PCB Layout Diagram
and 8.3 for Connection Diagrams.

FIRECLASS Prescient III 3.5 Actuator Circuits (ACT1 & ACT2)
Application, Installation & Commissioning Doc. version 2 15
3.5 Actuator Circuits (ACT1 &
ACT2)
Two fully monitored actuator circuits are provided. They
are monitored for Open Circuit and Short Circuit faults
(short circuit fault indication can be disabled). They are
rated at 1 A (fused), 28 V DC each. The End-Of-Line
device is a 10 kΩ resistor (3.9 kΩ can also be used).
The Blussturing Storing LED on the display
flashes for any fault condition on either Actuator Circuit,
with individual fault LEDs on the motherboard inside the
panel. Both circuits can be disabled by disabling the
extinguishing system (the Extinguishing Alarm circuit is
also disabled at the same time).
Note: The circuits are reverse-polarity monitored. The
PCB terminals are marked for the active polarity. Ensure
that all connected devices are polarised. See section
8.3.2.
3.6 Repeater Outputs (Z1, Z2,
AUX, MR, OUTPUTS 1, 2,
3, 4, 5)
Each repeater output consists of an Open Collector tran-
sistor driver capable of sinking up to 50 mA. The follow-
ing outputs are provided:
Z1 - Zone 1 Fire
Z2 - Zone 2 Fire
AUX - Auxiliary Zone Fire
MR - Manual Release Activated
OUTPUT 1 - Emergency Hold Activated (configur-
able for auto & manual mode)
OUTPUT 2 - Emergency Abort Activated (configur-
able for manual only mode)
OUTPUT 3 -System Disabled
OUTPUT 4 - Isolation Valve Closed
OUTPUT 5 - Isolation Valve Abnormal
3.7 Auxiliary 24 V DC Supply
The panel provides two auxiliary d.c. power supply out-
puts for connection to ancillary equipment:
1 AUX 250 mA: 24 V, 0 V) - This output is rated at
250 mA (electronically fused), 24 V DC.
2 AUX 1 A: 24 V, 0 V) - This output is rated at 1 A (elec-
tronically fused), 24 V DC.
3.8 Status Lamp Unit
The panel communicates with the Status Lamp Units
(SLU) via two-wire RS485 serial data. The following indi-
cations can be provided, dependent on SLU type:
1 BLUSSING GEBLOKKEERD
2 UITSTEL BLUSSING
3 BLUSSING AKTIEF
4 Auto & HANDBEDIENING
5 HANDBEDIENING
6 BLUSSING UIT
7 SLU STORING
8 BLUSVERTRAGING (fully functional SLU only)
The SLU can provide the following controls, dependent
on SLU type:
1 HANDACTIVERING
2 BLOKKEER
3UITSTEL
4 AUTOMATISCH & HANDBEDIENING / HANDBEDI-
ENING
The controls on the SLU can be transmitted via the
serial data link or hard-wired via conventional circuits on
the panel.
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 10kΩ
resistor.
Remote Sound Alarms:
Non-latching.
4.7 kΩ = activate general sounders.
When activated - steady "Remote Sound Alarms"
indication and continuous operation of general
sounders.
When deactivated - "Remote Sound Alarms" indica-
tion clears and general sounders stop.
Remote Silence Alarms:
Single Operation.
1.8 kΩ = silence active sounders (silencing of extin-
guishing sounders is inhibited until the Discharged
condition is active)
When activated - same operation as pressing the
Silence Alarms button.
When deactivated - no action
Remote Reset:
Single Operation.
560 Ω = 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 indications
on the Extinguishing section of the panel if the Reset
Inhibit is inactive.
When deactivated - no action

16 Application, Installation & Commissioning Doc. version 2
3.9 Remote Inputs FIRECLASS Prescient III
3.9.2 Gas Trapped (GAS TRAPPED)
This is a fully monitored input, providing open & short
circuit fault monitoring. The EOL device is a 10 kΩ resis-
tor, activated by a 680 Ω resistor. Activation illuminates
the HOGE DRUK VERZAMELLEIDING LED and raises
the general fault condition.
The inserts can then be cut out and inserted into the dis-
play board.
3.9.3 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 10kΩ
resistor, activated by a 4.7 Ω resistor. In the active state
the panel is placed in Manual Only mode and the yellow
Handbediening LED on the display board pulses.
Operation of the AUTO & HAND 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 FIRECLASS Prescient SLU installation
manual for more details.
3.9.4 Low Pressure Fault (GAS LOW)
This is a fully monitored input, providing open & short
circuit fault monitoring. The EOL device is a 10 kΩ resis-
tor, activated by a 680 Ω resistor. Activation illuminates
the LAGE DRUK GASCILLINDERS LED and raises the
general fault condition. An open or short circuit fault is
indicated by the Blussturing Storing LED on the
display and a Gas Low Fault LED on the motherboard.
The input is configurable for normally open or normally
closed operation via a DIL switch on the motherboard.
3.9.5 Extinguishing Isolation Valve
Status (ISO. VALVE)
This is a fully monitored input, providing open & short
circuit fault monitoring. The EOL device is a 10 kΩ resis-
tor, giving a AFSLUITER ONJUIST indication. An open
or short circuit fault is indicated by the Blussturing
Storing LED on the display and a Isolation Valve Fault
LED on the motherboard. Three states are possible on
the input:
1 Valve Closed:
Activated by a 680 Ω resistor, flashing the Valve Closed
LED on the display board & pulsing the internal buzzer.
2 Valve Open:
Activated by a 2.2 Ω resistor, no indication is given on
the panel as this is the healthy state for the input.
3 Valve Abnormal:
Activated by the 10 kΩ EOL resistor, flashing the
AFSLUITER ONJUIST LED on the display board & rais-
ing a general fault indication. A 2-second delay is applied
to the abnormal condition to avoid momentary activa-
tion during normal movement of the valve between
open and closed positions.
See Connection Diagram in section 8.3.2 for details.
3.9.6 Gas Released Pressure Switch
(GAS REL.)
This is a fully monitored input, providing open & short
circuit fault monitoring. The EOL device is a 10 kΩ resis-
tor. An open or short circuit fault is indicated by the
Blussturing Storing LED on the display and a Gas
Released Fault LED on the motherboard. The input
is activated by a 680 Ω resistor, illuminating the Blus-
sing Aktief LED on the display, the Extinguishing
sounder circuit, the Gas Released Signal & all three
shutdown outputs.
3.9.7 Emergency Hold (HOLD)
This is a fully monitored input, providing open & short
circuit fault monitoring. The EOL device is a 10 kΩ resis-
tor. An open or short circuit fault is indicated by the
Blussturing Storing LED on the display and a
Hold Fault LED on the motherboard. If a fault occurs
on the input during the Activated or Discharged condi-
tion then the fault indication is still given but the Uits-
tel Blussing LED is illuminated steady and the Hold
condition is established until the fault is removed. This
fault condition prevents the Extinguishant
release.
The input is activated by a 680 Ω resistor, illuminating
the Uitstel Blussing LED on the display and reset-
ting & holding the pre-discharge delay timer. The 2nd
Stage Relay is also de-energised.
Note
The healthy state for the input is VALVE
OPEN and therefore, if the input is not used,
the input should have a 2.2 Ω resistor fitted.
Note
If more than three Emergency Hold switches
connected to the Hold input are operated
simultaneously then a short circuit fault will
be detected. If this occurs while the Pre-dis-
charge timer is running, then the Timer will
still be reset and held until all switches are
released. Use only non-latching switches
which return to open contacts when the
switch is released.

FIRECLASS Prescient III 3.10 Relay Contacts
Application, Installation & Commissioning Doc. version 2 17
3.9.8 Emergency Abort Input (ABORT)
This is a fully monitored input, providing open & short
circuit fault monitoring. The EOL device is a 10 kΩ resis-
tor. An open or short circuit fault is indicated by the
Blussturing Storing LED on the display and an
Abort Fault LED on the motherboard. In addition,
the Blussing Geblokkeerd LED will pulse if the
system is not in the Activated or Discharged condition,
clearing when the fault is cleared. If a fault occurs on the
input during the Activated or Discharged condition then
the fault indication is still given but the Blussing
Geblokkeerd LED is illuminated steady and the Abort
condition is latched until reset. This fault condition pre-
vents the Extinguishant release.
The input is activated by a 680 Ω resistor, illuminating
the Blussing Geblokkeerd LED on the display and
stopping the Extinguishant release. The active abort
condition is latched until the input is cleared and the
Herstel Blussing button is pressed. If the input is
activated during a non-alarm condition then a fault will
be indicated.
3.10 Relay Contacts
Other than the Auxiliary Reset Relay, all Relay outputs
can be configured as either powered and monitored out-
puts or Volt-free relay contacts. The factory default is
powered and monitored outputs as required by EN54-
2:1997 & EN12094-1:2003.
3.10.1 First Stage Shutdown (1ST
STAGE)
The First Stage Shutdown Relay is energised when the
panel enters the pre-activated condition. This occurs
when the panel is in the AUTOMATIC & MANUAL
mode and a fire occurs on zone 1 or zone 2. The relay is
also energised if the panel enters the 2nd Stage or 3rd
Stage condition (see sections 3.10.2 and 3.10.3).
A triple jumper link allows the output to be powered and
monitored (Link ON) or Volt-Free (Link OFF).
In the Monitored mode, an open or short circuit fault on
the field wiring illuminates the Blussturing Stor-
ing LED on the display and the 1st Stage Shutdown
Fault LED on the motherboard.
In the Volt-free mode, clean contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
3.10.2 Second Stage Shutdown (2ND
STAGE)
The Second Stage Shutdown Relay is energised when
the panel enters the activated condition. This occurs
when the panel is in the AUTOMATIC & MANUAL
mode and a fire occurs on zone 1 and zone 2, or the
Manual Release is operated (in Auto or Manual mode).
The relay is also energised if the panel enters the 3rd
Stage condition (see section 3.10.3).
A triple jumper link allows the output to be powered and
monitored (Link ON) or Volt-Free (Link OFF).
In the Monitored mode, an open or short circuit fault on
the field wiring illuminates the Blussturing Stor-
ing LED on the display and the 2nd Stage Shutdown
Fault LED on the motherboard.
In the Volt-free mode, clean contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
3.10.3 Third Stage Shutdown (3RD
STAGE)
The Third Stage Shutdown Relay is energised when the
pre-discharge delay timer ends & the actuator circuits
are operated. The relay is also energised if the panel
enters the discharged condition due to operation of the
Gas Released Pressure Switch input.
A triple jumper link allows the output to be powered and
monitored (Link ON) or Volt-Free (Link OFF).
In the Monitored mode, an open or short circuit fault on
the field wiring illuminates the Blussturing Stor-
ing LED on the display and the 3rd Stage Shutdown
Fault LED on the motherboard.
In the Volt-free mode, clean contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
Note
If an SLU with a Hold switch is configured to
transmit the Hold signal via the serial commu-
nications path, a communication fault on this
path will initiate the Hold condition, as
described above, and the release of extinguis-
hant will be inhibited.
Note
Use only LATCHING switches which need to
be manually returned to the OFF position (this
is a requirement of EN 12094-1:2003 clause
4.27.2)
Note
If an SLU with an Abort switch is configured
to transmit the Abort signal via the serial com-
munications path, a communication fault on
this path will initiate the Abort condition, as
described above, and the release of extinguis-
hant will be aborted.

18 Application, Installation & Commissioning Doc. version 2
3.11 Internal Standby Batteries FIRECLASS Prescient III
3.10.4 Gas Discharged (GAS REL SIG)
The Gas Discharged Relay is energised when the Gas
Released Pressure Switch input is activated, or when
the actuator circuits are operated if the panel is config-
ured for NO PRESSURE SWITCH.
A triple jumper link allows the output to be powered and
monitored (Link ON) or Volt-Free (Link OFF).
In the Monitored mode, an open or short circuit fault on
the field wiring illuminates the Blussturing Stor-
ing LED on the display and the Gas Released signal
Fault LED on the motherboard.
In the Volt-free mode, clean contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
3.10.5 Fire Signal (FIRE SIG)
The Fire Signal Relay is energised when zones 1, 2 or
Aux zone detect a fire condition.
A triple jumper link allows the output to be powered and
monitored (Link ON) or Volt-Free (Link OFF).
In the Monitored mode, an open or short circuit fault on
the field wiring illuminates the Fire Signal Fault LED on
the display.
In the Volt-free mode, clean contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
3.10.6 Fault Signal (FAULT SIG)
The Fault Signal Relay is a fail-safe relay and is normally
energised. It is de-energised for any fault condition on
the panel.
A triple jumper link allows the output to be powered and
monitored (Link ON) or Volt-Free (Link OFF).
In the Monitored mode, an open or short circuit fault on
the field wiring illuminates the DOORM. STORING;
STORING/UIT LED on the display.
In the Volt-free mode, clean contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
3.10.7 Auxiliary Reset (RESET)
The Auxiliary Reset Relay is a single pole change-over
relay and is energised briefly when the panel is in Fire
Reset mode. The relay is energised for 10 seconds. This
is to allow ancillary equipment such as Beam Detectors
to be reset. The relay has no powered and monitored
mode and only volt-free contacts for Pole, Normally
Open & Normally Closed are available, rated at 1 A,
30 V DC.
3.11 Internal Standby Batteries
Terminals are provided to allow connection of one set of
internal standby batteries. The Charger Circuit is moni-
tored for the following:
Battery or associated wiring disconnected.
Battery fuse blown
Low battery voltage (<15.7 V ±0.4 V)
Battery and interconnection resistance is 0.35 Ω or
higher.
3.12 Function Enable/Disable
Switches
Two sets of DIL switches and one jumper link are avail-
able on the motherboard to allow the panel to be config-
ured for additional site-specific functions:
3.12.1 Function Select Switch
This consists of two sets of 12-way DIL switches, pro-
viding the following options:
12345
ON
CONFIG I/S INPUTS
PRE-DISCHARGE DELAY 5S
PRE-DISCHARGE DELAY 10S
SW1
789
10 11 12
6
PRE-DISCHARGE DELAY 20S
PRE-DISCHARGE DELAY 40S
SILENT ZONE TEST
BUZZER DISABLE
LATCHED FAULTS
INSTANT MANUAL RELEASE
BUZZER PULSES AT END OF DELAY
ZONES 1 & 2 SINGLE KNOCK
NO DISCHARGE PRESSURE SWITCH
12345
ON
ACTUATOR S/C DISABLE
1 MIN
2 MIN
SW2
789
10 11 12
6
4 MIN
8 MIN
16 MIN
CLEAR ACTUATORS AFTER 1 MIN
SILENCE ALARMS BEFORE RESET
OUTPUT 1-AUTO, 2-MANUAL
CONFIG SLU
3K9 EOL
N/C GAS LOW I/P
RESET
INHIBIT
PERIOD

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.

20 Application, Installation & Commissioning Doc. version 2
3.12 Function Enable/Disable Switches FIRECLASS Prescient III
INSTANT MANUAL RELEASE
Switch OFF:- Operation of Manual Release starts
the Pre-discharge delay timer.
Switch ON:- Operation of Manual Release bypasses
the Pre-discharge delay timer & operates the actua-
tor circuits immediately.
BUZZER PULSES AT END OF DELAY
Switch OFF:- No change in the state of the internal
buzzer during the last five seconds of the Pre-dis-
charge delay timer.
Switch ON:- The internal buzzer pulses during the
last five seconds of the Pre-discharge delay timer.
ZONES 1 & 2 SINGLE KNOCK
Switch OFF:- If the system is set to Auto & Manual
mode, a fire condition on both zones 1 & 2 is
required to start the pre-discharge delay timer.
Switch ON:- If the system is set to Auto & Manual
mode, a fire condition on either zone 1 or zone 2 will
start the pre-discharge delay timer.
NO DISCHARGE PRESSURE SWITCH
Switch OFF:- The Panel only indicates BLUSSING
AKTIEF when the GAS REL. input is activated (via a
Discharge Pressure switch).
Switch ON:- The panel indicates BLUSSING AKTIEF
as soon as the actuator circuits are activated.
ACTUATOR S/C DISABLE
Switch OFF:- The actuator circuits are monitored for
open & short circuit faults.
Switch ON:- The actuator circuits are only monitored
for open circuit faults. Used for open-circuit fault
monitoring of the solenoid coil without a series end-
of-line resistor.
RESET INHIBIT PERIOD
Five switches allow the Extinguishing System Reset
Inhibit timer to be configured from 0 to 30 minutes in 1-
minute increments. Any of the five switches in the ON
position adds to the timer value, up to a maximum of 30
minutes.
CLEAR ACTUATORS AFTER 1 MIN
Switch OFF:- The actuator circuits are energised
until the Extinguishing System is reset.
Switch ON:- The actuator circuits are only energised
for 1 minute and then are de-energised.
Reset
Inhibit
Length
(minutes)
SW2-2
1m
SW2-3
2m
SW2-4
4m
SW2-5
8m
SW2-5
16m
0 OFF OFF OFF OFF OFF
1 ON OFF OFF OFF OFF
2 OFF ON OFF OFF OFF
3 ON ON OFF OFF OFF
4 OFF OFF ON OFF OFF
5 ON OFF ON OFF OFF
6 OFF ON ON OFF OFF
7ONONONOFFOFF
8 OFF OFF OFF ON OFF
9 ON OFF OFF ON OFF
10 OFF ON OFF ON OFF
11 ON ON OFF ON OFF
12 OFF OFF ON ON OFF
13 ON OFF ON ON OFF
14 OFF ON ON ON OFF
15 ON ON ON ON OFF
16 OFF OFF OFF OFF ON
17 ON OFF OFF OFF ON
18 OFF ON OFF OFF ON
19 ON ON OFF OFF ON
20 OFF OFF ON OFF ON
21 ON OFF ON OFF ON
22 OFF ON ON OFF ON
23 ON ON ON OFF ON
24 OFF OFF OFF ON ON
25 ON OFF OFF ON ON
26 OFF ON OFF ON ON
27 ON ON OFF ON ON
28 OFF OFF ON ON ON
29 ON OFF ON ON ON
30 OFF ON ON ON ON
31 ON ON ON ON ON
Table 4: Instant Manual Release
Note
This facility is only to be used where the actu-
ators connected to the actuator circuits
remain activated when the power is removed
and require manual resetting. This facility is
not intended to control the gas discharge
period. It is only provided as a means to
reduce current consumption during gas dis-
charge.