Kentec Electronics Sigma XT Plus User manual

Sigma XT+
Extinguishant Coincidence Unit
Operation and Maintenance Manual
Man-1111 Issue 18 May 2016

Man-1111_SigmaXT+_Coincidence_Unit_18 Page 2 of 36
1. INTRODUCTION ................................................................................ 4
2. SAFETY............................................................................................ 4
2.1. Static precautions ............................................................................................................................5
3. MOUNTING....................................................................................... 5
4. TECHNICAL SPECIFICATION ............................................................... 6
5. FRONT PANEL LAYOUT ....................................................................... 8
6. REMOVING THE EQUIPMENT CHASSIS ................................................. 8
7. SYSTEM DIAGRAMS........................................................................... 9
8. CONNECTING TO THE CIRCUIT BOARD................................................10
8.1. Sounder circuit wiring....................................................................................................................12
8.2. Connection to extinguishant output ...............................................................................................13
8.2.1 Solenoid wiring............................................................................................. 13
8.2.2 Igniting actuator wiring ................................................................................. 13
8.3 Connecting to activation inputs.......................................................................................................14
8.4 Connecting to Sigma CP fire panel serial bus ..................................................................................15
9. Setting up extinguishant monitoring circuit......................................................................................16
10. AUX 24V DC SUPPLY OUTPUTS.........................................................16
11. CONNECTION TO RELAY CONTACTS..................................................17
11.1 Fault relay.....................................................................................................................................17
11.2 1st stage alarm relay (on extinguishing modules) .........................................................................17
11.3 2nd stage alarm relay (on extinguishing modules) .......................................................................17
11.4 Released relay (on extinguishing modules) ..................................................................................17
11.5 Aborted relay (on extinguishing modules) ....................................................................................17
11.6 Extract relay (on extinguishing modules) .....................................................................................17
12. CONNECTION AND CONFIGURATION OF STATUS UNITS AND ANCILLARY
BOARDS.............................................................................................18
12.1 Adding new status units/ancillary boards.....................................................................................18
12.2 Removing status units or ancillary boards ....................................................................................19
13. WIRING TO STATUS UNITS AND ANCILLARY BOARD ...........................20
14. CONFIGURATION............................................................................21
14.1 Language selection .......................................................................................................................21
14.2 Extinguishant output mode ...........................................................................................................21
14.3 Configuring the activation mode ...................................................................................................21
14.5 Configuring the activation zones (Sigma CP panel connection only).............................................21
14.6 Reset inhibit time..........................................................................................................................22
14.7 Pre-release delay time ..................................................................................................................22
14.8 Extinguishant release time............................................................................................................23
14.9 Second stage alarm pulsing/continuous .......................................................................................23
14.10 Released indication .....................................................................................................................23
14.11 Delay on manual release.............................................................................................................24
14.12 Release timer (infinite duration).................................................................................................24
14.13 R0V not removed on reset...........................................................................................................24
14.14 Disable earth fault monitoring ....................................................................................................24
14.15 Disable fault output ....................................................................................................................25
14.16 Invert low pressure switch input ................................................................................................25
14.17 Extinguishant output monitoring levels ......................................................................................25
15. PANEL OPERATION – ACCESS LEVELS 1 AND 2...................................26
15.1 Normal condition...........................................................................................................................26
15.2 Access level 2................................................................................................................................26
15.2.1 Disable extinguishant release outputs. ........................................................... 26
15.2.2 Disable Manual release ................................................................................ 26
15.2.3 Disable Stage 1 output ................................................................................ 27
15.2.4 Disable Stage 2 output ................................................................................ 27
15.2.5 Disable Released output............................................................................... 27
15.2.6 Disable Extract output ................................................................................. 27
15.2.7 Turn on Extract output................................................................................. 27

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15.2.8 Select Reserve Solenoid Output (Configuration Option) .................................... 28
15.3 Single input activation ..................................................................................................................28
15.4 Double input activation .................................................................................................................28
15.5 Reset.............................................................................................................................................28
15.6 Sounder fault ................................................................................................................................28
15.7 Power fault ...................................................................................................................................29
15.8 System fault..................................................................................................................................29
15.9 Lamp test......................................................................................................................................29
15.10 Hold condition.............................................................................................................................29
15.11 Released condition......................................................................................................................29
15.12 Low pressure switch ...................................................................................................................29
15.13 Manual only mode .......................................................................................................................29
15.14 Manual Release ...........................................................................................................................29
15.15 Abort input..................................................................................................................................29
16. INTERNAL CONTROLS .....................................................................29
16.1 Watchdog reset.............................................................................................................................30
16.2 Processor reset .............................................................................................................................30
16.3 Terminate extinguishant...............................................................................................................30
16.4 Write enable switch ......................................................................................................................30
16.5 Address switch..............................................................................................................................30
17. INTERNAL INDICATIONS .................................................................31
17.1 Watchdog......................................................................................................................................31
17.2 System fuse ..................................................................................................................................31
17.3 Man. Release.................................................................................................................................31
18. POWER SUPPLY..............................................................................31
19. MAINTENANCE...............................................................................32
20. CE MARK.......................................................................................33
21. COMMISSIONING INSTRUCTIONS.....................................................34

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1. Introduction
The SIGMA XT+ Extinguishant Coincidence Unit is designed in accordance with European standard EN12094-1 Fixed
firefighting systems - Components for gas extinguishing systems - Part 1: Requirements and test methods for
electrical automatic control and delay devices.
The Sigma XT+ ECU is a self contained extinguishant release control unit that can receive activation signals at
supervised inputs via volt free contacts from other fire detection control panels or from addressable output modules.
It may also be connected to a Sigma CP fire panel serial bus and receive activation signals via this serial link.
ECUs have an integral, mains powered, EN54-4 compliant battery charger and power supply.
In addition to the requirements of EN12094-1 the ECU has the following facilities:
Delay of extinguishing signal of up to 60 seconds. EN12094-1 Section 4.17: (option with requirements).
Signal representing the flow of extinguishing agent to indicate the released condition. EN12094-1 Section 4.18:
(option with requirements).
Monitoring of the status of components by way of a low pressure switch input. EN12094-1 Section 4.19 : (option with
requirements).
Emergency hold device to enable the extinguishant delay time to be extended. EN12094-1 Section 4.20: (option with
requirements).
Control of flooding time to deactivate the releasing output after a set period of time. EN12094-1 Section 4.21:
(option with requirements).
Manual only mode to disable the release of extinguishant via automatic detection devices. EN12094-1 Section 4.23:
(option with requirements).
Triggering of equipment outside the system by way of first and second stage contacts, extract fan output etc.
EN12094-1 Section 4.26: (option with requirements).
Activation of alarm devices with different signals to indicate pre- discharge and released warnings using different
sounds. EN12094-1 Section 4.30: (option with requirements).
Emergency Abort device to inhibit the extinguishing signal until the emergency abort device has been de-activated
and the panel has been reset. EN12094-1 Section 4.27: (option with requirement).
2. Safety
Suppliers of articles for use at work are required under section 6 of the Health and Safety at Work act 1974 to ensure
as reasonably as is practical that the article will be safe and without risk to health when properly used.
An article is not regarded as properly used if it is used ‘without regard to any relevant information or advice’ relating
to its use made available by the supplier.
This product should be installed, commissioned and maintained by trained service personnel in accordance with the
following:
(i) IEE regulations for electrical equipment in buildings
(ii) Codes of practice
(iii) Statutory requirements
(iv) Any instructions specifically advised by the manufacturer
According to the provisions of the Act you are therefore requested to take such steps as are necessary to ensure that
you make any appropriate information about this product available to anyone concerned with its use.
This equipment is designed to operate from 230V 50Hz mains supplies and is of class 1 construction. As such it
must be connected to a protective earthing conductor in the fixed wiring of the installation and a readily accessible
double pole disconnect device meeting the requirements of EN60950/IEC950 which disconnects live and neutral
simultaneously shall be incorporated in the fixed wiring.
Switch disconnect devices such as MK Sentry 63A or similar are suitable for this.
Failure to ensure that all conductive accessible parts of this equipment are adequately bonded to the
protective earth will render the equipment unsafe.
This control panel is environmental class A and is designed for indoor use only at temperatures between -50C (+/- 3)
and +400C (+/- 2) and with a maximum relative humidity of 95%.
The IP rating for the enclosure is IP30.

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Operation outside of these limits may render the equipment unsafe.
2.1. Static precautions
Installation of the panel should be carried out by qualified personnel only. The electronic components within the
panel are vulnerable to physical damage and damage by electrostatic discharges.
It is advisable to wear a wrist strap designed to prevent the build-up of static charges within the body,
before handling any electronic circuit boards.
Never insert or remove boards or components with the power on.
3. Mounting
The ECU should be mounted on a dry, flat surface, at eye height to the display and in a level position such that the
enclosure is not distorted.
Screws or bolts of a minimum of 5mm diameter must be used to mount the enclosure in all three mounting positions.
It should be positioned in an accessible place as agreed with the end user.
Suitable fixings should be used at all fixing points such that the unit is securely mounted and is not liable to move
once fixed.
The ECU should not be mounted in another enclosure or near sources of excessive heat.
Cables should be connected using suitable cable glands fitted to the knockouts provided. If additional cable entry
points are required, all swarf and debris caused by drilling of additional cable entries must be cleared before power is
applied to the unit.
Cables should not be installed in the bottom of the enclosure. This space must be kept free for batteries.
The Sigma XT+ ECU uses the H2 size enclosure, which is 385mm W x 310mm H x 110 mm D and is sufficient to
house 7Ah batteries.
5mm DIAMETER SCREWS
C2
C2
C2
C2
FIX TO FLAT SURFACE USING SUITABLE WALL PLUGS
SIDE VIEW FRONT VIEW

Man-1111_SigmaXT+_Coincidence_Unit_18 Page 6 of 36
4. Technical specification
Table 1 - Electrical specifications
ITEM ELECTRICAL RATING COMMENT COMMUNICATION
PARAMETERS
Mains supply 230V AC, 50Hz +10% - 15% (100 Watts maximum) Standard European mains
connection
Mains supply fuse F3A 250V TD 20mm Replace only with similar type
Power supply rating 5A when battery charging is not required S406 power supply
Maximum ripple voltage 1V
Battery type (Yuasa NP) 2 x 12 Volt sealed lead acid in series
Maximum Battery Capacity within
Enclosure Yuasa 7Ah
Up to 26Ah batteries supported by power
supply (in mechanically coupled battery
cabinet)
Battery charge voltage 27.6VDC nominal (temperature compensated) Modulated DC
Battery charge current 1.25A maximum Modulated DC
Imax a 4A
Imax b 5A
Ri max 1R
Current draw in mains fail
condition 60 milliamps quiescent – 107 milliamps full alarm
Maximum current draw from
batteries 7 Amps With main power source disconnected
Aux 24V output Fused at 500mA with electronic fuse 200 milliamp maximum continuous load
1st and 2nd stage Sounder outputs 21 to 28V DC Fused at 1A with electronic fuse 1.0 Amp total load over all circuits Voltage reversing DC
Fault relay contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
First stage contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Second stage contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Extract contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Terminal capacity 0.5mm2to 2.5mm2 solid or stranded wire
Number of sounders per circuit Dependent on type and current consumption See table 2 for sounder types
Monitored input end of line 6K8 +/- 5% ½ Watt resistor Supplied in terminals
Sounder circuit end of line 10K +/- 5% ¼ Watt resistor Supplied in terminals
Extinguishant output end of line 1N4004 Diode Supplied in terminals
No. of sounder circuits (2) 21 to 28V DC 1 x 1st stage and 1 x 2nd stage
Extinguishant release outputs (2) 21 to 28V DC. Fused at 1 Amp 1 Amp maximum load for 5 minutes
3A for 20 milliseconds Voltage reversing DC with calibration facility
Extinguishant release delay Adjustable 0 to 60 seconds (+/- 10%) 5 second steps
Extinguishant release duration Adjustable 60 to 300 seconds 5 second steps
Cabling FP200 or equivalent (maximum capacitance 1uF max
inductance 1mH Metal cable glands must be used
Monitored inputs normal threshold
(Allowable EOL) 10K ohm to 2K ohm
Monitored inputs alarm threshold 2K ohms to 150 ohms +/- 5%
Monitored inputs Short circuit
threshold 140 ohms to 0 ohms +/- 5%
Status unit/Ancillary board
connection Two wire RS485 connection (EIA-485 specification) Maximum of 7 units - RS485 data cable (EIA-485 specification)
Status unit power output 21 to 28V DC, Fused at 500mA with electronic fuse 300 milliamp maximum load

Man-1111_SigmaXT+_Coincidence_Unit_18 Page 7 of 36
Table 2 - Compatible sounders
Model Type Manufacturer
BANSHEE ELECTRONIC VIMPEX
WAFER ELECTRONIC VIMPEX
FIRECRYER RANGE ELECTRONIC VOICE VIMPEX
KOBELL MOTORISED VIMPEX
ASKARI ELECTRONIC FULLEON
ROSHNI ELECTRONIC FULLEON
SQUASHNI ELECTRONIC FULLEON
SYMPHONI ELECTRONIC FULLEON
ELECTRONIC BELL ELECTRONIC FULLEON
CFB BELLS MOTORISED FULLEON
B6 AND B8 BELLS SOLENOID FULLEON

Man-1111_SigmaXT+_Coincidence_Unit_18 Page 8 of 36
5. Front panel layout
6. Removing the equipment chassis
Open the control panel lid using the 801 lock key.
Before the chassis can be removed it will be necessary to disconnect the power cables from connector terminal
block on the left hand side of the PCB.
The chassis is held in place by two screws. Undo the two screws and lift the chassis gently away from the box
towards you.
With the chassis removed, there is much more room inside the panel for making off and dressing cables.
When cabling work is complete, the chassis can be re-fitted and the power cables re-connected.
IMPORTANT -Ensure that the power cables are connected correctly.

Man-1111_SigmaXT+_Coincidence_Unit_18 Page 9 of 36
7. System diagrams
2 WIRE RS485 SERIAL
BUS 2 WIRE RS485 SERIAL BUS 2 WIRE RS485 SERIAL BUS 2 WIRE RS485 SERIAL BUS
UP TO 4 ECU CONNECTED TO SIGMA CP CONVENTIONAL FIRE PANEL RS485 SERIAL BUS
ADDRESSABLE
OUTPUT
MODULE
ADDRESSABLE
OUTPUT
MODULE
ADDRESSABLE
OUTPUT
MODULE
ADDRESSABLE
OUTPUT
MODULE
ADDRESSABLE LOOP
ANY NUMBER OF ECU CONNECTED TO ADDRESSABLE FIRE PANEL VIA LOOP OUTPUT MODULES
SIGMA CP FIRE PANEL
ADDRESSABLE FIRE PANEL
ECU ECU ECU ECU
ECU ECU ECU ECU
ANY NUMBER OF ECU CONNECTED TO CONVENTIONAL FIRE PANEL WITH ZONAL VOLT FREE RELAY CONTACTS
CONVENTIONAL FIRE PANEL
ECU ECU ECU ECU

Man-1111_SigmaXT+_Coincidence_Unit_18 Page 10 of 36
8. Connecting to the circuit board
All connections for field wiring are to rows of terminals along the top and bottom of the circuit board.
Shielded fire alarm cable such as FP200 and metal cable glands must be used for all connections to the panel.
The shield of the cable must be bonded securely to the enclosure earth via a metal cable gland.
The resistance of any core of any cable must not exceed 25 ohms. The shield of the cable must be bonded
securely to the enclosure via the metal gland.
Wiring should enter the enclosure at the top or back of the panel using the knockouts provided and be formed
tidily to the appropriate terminals.
Terminals are capable of accepting wires of up to 2.5mm2.
Wiring must not go across the front of the circuit board. If cable entries need to be in positions other than at the
knockouts provided, wiring must be fed behind and well away from the surface of the circuit board.
The space at the bottom of the enclosure is largely occupied by the standby batteries so this must be borne in
mind when considering cable entries.