Kentec Electronics Sigma ZXT SI User manual

Man-1453 Rev.01
Extinguishant Control
Sigma ZXT SI
Product Manual
*Man-1428*

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:
• EE regulations for electrical equipment in buildings
• Codes of practice
• Statutory requirements
• 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.
Failure to ensure that all conductive accessible parts of this equipment are adequately bonded to the pro-
tective earth will render the equipment unsafe.
Disclaimer
In no event shall The Manufacturer be liable for any damages or injury of any nature or kind, no matter how caused,
that arise from the use of the equipment referred to in this manual.
Strict compliance with the safety procedures set out and referred to in this manual, and extreme care in the handling
or use of the equipment, are essential to avoid or minimise the chance of personal injury or damage to the equip-
ment.
The information, figures, illustrations, tables, specifications, and schematics contained in this manual are believed
to be correct and accurate as at the date of publication or revision. However, no representation or warranty with re-
spect to such correctness or accuracy is given or implied and The Manufacturer will not, under any circumstances,
be liable to any person or corporation for any loss or damages incurred in connection with the use of this manual.
The information, figures, illustrations, tables, specifications, and schematics contained in this manual are subject to
change without notice.
Unauthorised modifications to the fire detection system or its installation are not permitted, as these may give rise
to unacceptable health and safety hazards.
Any software forming part of this equipment should be used only for the purposes for which The Company supplied
it. The user shall undertake no changes, modifications, conversions, translations into another computer language,
or copies (except for a necessary backup copy).In no event shall The Manufacturer be liable for any equipment mal-
function or damages whatsoever, including (without limitation) incidental, direct, indirect, special, and consequential
damages, damages for loss of business profits, business interruption, loss of business information, or other pecu-
niary loss, resulting from any violation of the above prohibitions.

Contents i
Man-1453 Rev.01
Sigma ZXT Product Manual
Section 1
Introduction ...................................................................................................................... 1
Supporting Documentation ..............................................................................................................................1
Section 2
Overview ........................................................................................................................... 2
Section 3
Installation and Configuration ........................................................................................ 4
Before You Begin ............................................................................................................................................4
Installation checklist ........................................................................................................................................4
Mounting the Unit ............................................................................................................................................5
Addressing Status Units ..................................................................................................................................6
Electrical Connections .....................................................................................................................................6
Connecting to the Circuit Board ......................................................................................................................7
Power and Data Connections .........................................................................................................................8
Data Termination .............................................................................................................................................8
Connection to Hold and Mode Inputs ..............................................................................................................9
Mode Input ...................................................................................................................................................9
Hold Input .....................................................................................................................................................9
Modes Select Key-Switch ...............................................................................................................................10
Manual Release ..............................................................................................................................................10
Processor and Watchdog Reset Switches ......................................................................................................10
Section 4
Status Indicator LED Indications .................................................................................... 11
Manual Only ....................................................................................................................................................11
Auto/Manual ....................................................................................................................................................11
Hold Activated .................................................................................................................................................11
Disabled ..........................................................................................................................................................11
Imminent .........................................................................................................................................................11
Released .........................................................................................................................................................11
Fire Zone ‘n’ ....................................................................................................................................................11
Fault ................................................................................................................................................................11
Section 5
Controls & Internal Indications ....................................................................................... 12
Modes Select Key-Switch ...............................................................................................................................12
Manual Release ..............................................................................................................................................12
Processor and Watchdog Reset Switches ......................................................................................................13
Internal LED Indicators ....................................................................................................................................13
COM .............................................................................................................................................................13
HOL ..............................................................................................................................................................13
MOD .............................................................................................................................................................13
FUSE ............................................................................................................................................................13
Section 6
Adding/Removing Status Indicators & Ancillary Boards ............................................. 14
Adding a Status Unit to a ZXT .........................................................................................................................14
Removing a Status Indicator ...........................................................................................................................17
Adding an Ancillary Board to a ZXT ................................................................................................................18
Removing an Ancillary Board ..........................................................................................................................20
Section 7
Panel Maintenance ........................................................................................................... 21
Appendix A
Specifications ................................................................................................................... 22

Introduction 1
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Section 1
Introduction
The Sigma-SI Status Units are designed in accordance with European standard EN12094-1 Fixed fire-fighting sys-
tems - Components for gas extinguishing systems - Part 1: Requirements and test methods for electrical automatic
control and delay devices.
The Sigma ZXT SI Status Units are designed to extend the indications and some controls of Sigma ZXT extinguis-
hant control panels to other locations within the fire protection system. They can be introduced to make operation
of the system more practical, within areas that have multiple access points (or doors). A maximum of seven status
units may be connected to each control panel extinguishant area.
All units connect to a two wire data communications bus and are powered by the Auxiliary 24V DC output of com-
patible, extinguishant Control Panels.
The Sigma ZXT SI range consists of:
Supporting Documentation
In conjunction with this manual, it is strongly advised that Sigma ZXT Product Manual is read and understood.
Sigma ZXT Installation Manual
Using the a smart phone or device, the Manual can be accessed by working with the QR code below:
Should you be unable to work with QR codes the Manual can be obtained by visiting the following website pages:
Item Product Code Description
1. K921000M8 6 Lamp Status Unit
2. K921010M8 6 Lamp Status Unit with Manual Release
3. K921100M8 6 Lamp Status Unit with Mode Select
4. K921110M8 6 Lamp Status Unit with Mode Select & Manual Release
5. K921113M8 10 Lamp Status Unit with Buzzer, Mode Select & Manual Release
6. W921000W8 Weatherproof 6 Lamp Status Unit
7. W921100W8 Weatherproof 6 Lamp Status Unit with Mode Select
8. W921110W8 Weatherproof 6 Lamp Status Unit with Mode Select & Manual Release
9. W921113W8 Weatherproof 10 Lamp Status Unit with Buzzer, Mode Select & Manual Release
Installation Manual
Manual Variant Website
Installation Manual http://www.kentec.co.uk/manuals/man-1451EN.pdf

Overview 2
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Section 2
Overview
The following diagrams provide an overview of panel features.
Figure 2-1
Status Unit Indicator Features
ID Feature Function Item
1 Status indicators Manual Only 1 - 9
Auto/Manual 1 - 9
Hold Activated 1 - 9
Disabled 1 - 9
Imminent 1 - 9
Released 1 - 9
Fire Zone 1 5 & 9
Fire Zone 2 5 & 9
Fire Zone 3 5 & 9
Fault 5 & 9
2 Numeric countdown Seconds Until Discharge All items
3 Key switch Mode Select 3, 4, 5, 7 & 8
4 Enclosure lid retaining screw (x2) N/a All items
5 Extinguishant release push-button
(beneath anti-tamper cover)
Manual Release (Extinguishant) 2, 4, 5, 8, 9
6 Enclosure knock-outs Cable entry points All items
12 3
4
5
6

Overview 2
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Figure 2-2
Internal Layout (Rear of Enclosure Lid)
ID Feature Function Items
1 Printed Circuit Board All items
2 DIP switch Binary address setting All items
3 Push-buttons Processor and Watchdog Reset All items
4 Status Indicators COM, HOLD, MOD, CPU, FUSE All items
5 Input Terminals E, 24V DC, RS485, MODE, HOLD All items
1
3
5
4
6
2
1
2 3 4
5
E+-+-+-+-MODE
24V DC
RS485 RS485
HOLD

Installation and Configuration 3
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Section 3
Installation and Configuration
This section describes the installation process.
Before You Begin
Before you begin the installation, take time to review the installation information, gather the required items and com-
plete the tasks listed below.
CAUTION!
• Create a plan and checklist before starting the installation process.
• Select an environment that is suitable for operating the unit. The site chosen for mounting the unit should be
clean, dry, flat and not subject to excessive shock, vibration or heat. Ensure after the installation the enclosure
is free from any debris.
• Verify the following items are present:
Installation checklist
The installation must be performed by qualified personnel familiar with electronic components. Electronic
components within the Control Panel are vulnerable to damage from electronic discharge. Ground straps
must be worn by installers before handling circuit boards to prevent damage from electronic discharge.
Item Quantity Description
Enclosure back box 1
Mild steel enclosure comprising of lid, back-box, hinge pins, label plates, Panel lock.
Enclosure lid 1 Control Panel assembly (fascia plate) complete with printed circuit board (PCB).
Create an installation plan and checklist.
Remove the unit from its packaging and check the contents.
Remove the enclosure lid assembly.
Mount the enclosure to the premises wall using appropriate fixings.
Thread external cabling into the enclosure and make connections to unit input terminals
(to rear of enclosure lid).
Re-fit enclosure lid.
Apply power.
Configure.
Test installation.

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Mounting the Unit
The unit should be mounted on a dry, flat surface at eye height to the display in a level position such that the enclo-
sure is not distorted.
Screws or bolts 5mm diameter, minimum 40mm in length with corresponding wall plugs as appropriate.
The unit 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 unit should not be
mounted in another enclosure or near sources of excessive heat. Cables should be connected through suitable ca-
ble glands fitted to the knock-outs (20mm dia.) provided.
It is advised to use the cable entry knock-outs provided. Drilling of additional holes is not recommended as this can
cause damage to the enclosure and internal components.
Figure 3-1
Enclosure Back-Box Dimensions (mm). Not to scale.
Figure 3-2
Weather Proof Enclosure Back-Box Dimensions (mm). Not to scale.
186.0
143.0
4x 6Ø
132.0
47.0
244.0
257.0
4x 4.5Ø
134.0
47.0 168.0

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Addressing Status Units
To enable the Control Panel to know whether any Status Units that should be connected have been disconnected
(and indicate a fault condition), each status unit must be allocated an address. The address switch should never be
set with all switches off.
This is achieved by setting a binary number from 1 to 7 on the 3 way, DIL switch located at the bottom of the Status
Unit PCB.
The order of the addresses is not important but each status unit must be allocated a different address. The switch
settings for each of the addresses are shown below.
Figure 3-3
DIL Switch Address Numbering
Electrical Connections
All connections for wiring are to a single row of screw terminals along the right-hand edge of the printed circuit board
to the rear of the enclosure lid.
Figure 3-4
Screw Terminals
The table below shows terminal designations.
Terminal Function
E Cable shield, earth terminal.
24V (+/-),(+/-) Power input, typically from control panel. Secondary set of
common terminals for powering other status units.
RS485 (+/-),(+/-) RS485 data input from control panel/network. Secondary set
of common terminals for connecting other status units.
MODE Input terminals for a Mode Select ancillary.
HOLD Input terminals for a Hold Off ancillary.
E+-+-+-+-
MODE
24V DC RS485 RS485
HOLD

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Connecting to the Circuit Board
All connections for field wiring are to a single row of terminals along the side of the circuit board. Shielded fire alarm
cable such as FP200 and metal cable glands must be used for all connections to the status unit. 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, bottom or back of the unit using the knock-outs
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 knock-outs provided, wiring must be fed well away from the surface of the circuit board.
Figure 3-5
Wiring Convention
CORRECT INCORRECT

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Power and Data Connections
Each status unit requires two cores for power and two cores for data transmission to and from the control panel. A
four core cable may be used for these connections. All of these connections are polarity conscious and care should
be taken to match the polarity with the corresponding terminals at the control panel.
Figure 3-6
Example Connection
Data Termination
Up to seven status units can be connected to an extinguishant control panel. In and out terminals for data and 24V
DC are provided on each unit.
All status units are supplied with a push on jumper fitted at position J2 on the left hand side of the PCB. This jumper
connects a terminating resistor which needs to be in place at the last status unit on the data line. If more than one
status unit is to be fitted then the jumpers must be removed from all status units except the last one.
If there is only one status unit fitted then the jumper should be left in place.
E+-+-+-+-MODE
24V DC RS485 RS485
HOLD E+-+-+-+-MODE
24V DC RS485 RS485
HOLD
E
24V DC
RELEASERELAY RELAY
MAN.S3FIRE
CNO
RELEASED
CNO
MODE
CNO
HOLD
CNO
ABORT
CNO
HOLD ABORT MODE
SWITCH
REL PRES.
SWITCH
LOW PRES. DIS EXTG. EXTING. RS485 AUX24
FAULT
NO C NC
PROG I/P
0VP2
P1
ZONE 3ZONE 1 ZONE 2 S2S1
Leave jumper fitted
to last Status Unit
connected.
Remove jumper un-
less Status Unit is
the only or last one
connected.
Status Unit
Status Unit
Sigma ZXT Panel

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Connection to Hold and Mode Inputs
Status units have monitored inputs to which remote Hold or Mode select switches can be connected.
These inputs are monitored for open and short circuit faults and therefore need to have a 470R (1W) trigger resistor
connected in series with the activating, normally open switches and 6K8 (0.5W) end of line monitoring resistors con-
nected across the end of the cables.
The 6K8 end of line monitoring resistors are supplied fitted to the Hold and Mode input terminals and the 470R trig-
ger resistors are supplied in the accessory bag with the status unit.
If either of these inputs are not being used then the end of line monitoring resistors should be left in the Hold and/or
Mode terminals.
Figure 3-7
Example Connection
Mode Input
The mode input is provided to allow connection of remote Mode Select keys-witches or to connect to door interlock
contacts. The system is designed such that any ‘Manual Only’ mode input on the system that is active (input oper-
ated by 470R trigger resistor) will put the system into ‘Manual Only’ mode regardless of the status of any other Mode
inputs. Therefore, for the system to be in ‘Automatic and Manual Mode’, all Mode inputs must be inactive.
Indication of the Mode is given on the front of the status unit by the Manual only or Automatic and manual LEDs.
Hold Input
When active (input operated by a 470R trigger resistor) the Hold input allows the extinguishant release countdown
timer to be reset to its maximum time. When the input is de-activated the countdown to extinguishant release will re-
start at the maximum time that is configured at the panel (0 to 60 seconds).
IMPORTANT NOTE: When there is a fault on the HOLD input then the HOLD function is invoked which
means that the extinguishant release will not operate until this condition is cleared.
E+-+-+-+-
MODE
24V DC RS485 RS485
HOLD
6K8 6K8
470R
470R

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Modes Select Key-Switch
Some models of the Status Units have a ‘Mode Select’ key-switch. The key can be removed in either position. The
operation of the Mode Select key-switch is as per the Mode input above.
Manual Release
Some models of the status units are fitted with a ‘Manual Release’ push-button. This replicates the action of the man-
ual release control at the main Control Panel and once activated will start the extinguishant release sequence.
A plastic seal is provided in the accessory pack and should be fitted to the manual release flap with a piece of thin
wire to provide an indication if the Manual Release has been tampered with.
Processor and Watchdog Reset Switches
The status unit is controlled by a microprocessor, which will re-start itself and continue to run if it stops.
To ensure that the unit is not being subjected to continual, undue interference which may effect its proper operation,
a CPU fault indicator is latched on and a fault condition signalled to the Control Panel.
If a processor re-start has occurred, this latched fault condition will need to de reset by pressing the WDOG RESET
button on the bottom of the PCB.
A switch is also provided to manually re-start the processor PROC RESET. This switch can be used while connected
to the system to ensure that unit starts and establishes communication with the Panel in a controlled and expected
manner.
Figure 3-8
Processor and Watchdog Reset Switches
Processor Reset Watchdog Reset

Status Indicator LED Indications 4
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Section 4
Status Indicator LED Indications
Sigma ZXT Status Indicators are provided with either 6 or 10 status LED’s dependent on the model number. These
LED indications are to supplement the Extinguishing Control Panel. Further information relating to the LED indica-
tions and their purpose are as follows:
Manual Only
An amber LED which indicates that the extinguishing system has been placed in manual mode.
In “Manual” mode the Extinguishing Release can only be triggered through manual intervention i.e. operation of a
Manual Release Push-button on the Panel/Status Indicator or operation of a Manual Release Call Point. Automatic
detection zone alarms will not activate the extinguishing release system when in Manual Mode.
Auto/Manual
An amber LED which indicates that the extinguishing system is in Auto/Manual Mode.
In Auto/Manual mode activation of the extinguishing release can be triggered by a combination of the automatic de-
tection zones or by operation of the Manual Release Push-button or Manual Release Call Point.
Hold Activated
An amber LED which Illuminates when the Hold circuit has been activated.
Activation of the hold circuit during the gas release countdown will temporary “HOLD” the release countdown timer,
the release countdown timer will continue counting down once the hold input has deactivated.
Disabled
An amber LED which Indicates that either the Extinguishant Release system or the Manual Release function has
been disabled, the LED will illuminate the LED constantly or will flash the LED dependent on the disablement status:
Extinguishing Disabled
LED will illuminate constantly - Extinguishing disablement prevents a gas release occurring while active.
Manual Release Disabled
LED will flash - This prevents the panel from being activated by a Manual Release Push-button on the Control
Panel or Status Indicator, also prevents activation from a manual release input.Extinguishant release can still
be activated through the use of automatic detection devices.
Imminent
A red LED which Indicates that 2nd stage activation has been triggered and release of the extinguishant is imminent.
Released
A red LED Indicates that extinguishant has been released into the protected area.
10 LED status indicators provide the following additional indicators:
Fire Zone ‘n’
Three red LED’s which when illuminated indicate a fire on the associated detection zone 1, 2 or 3.
Fault
An amber LED Indicates an active fault condition on the system, extinguishing control panel will provide specific de-
tails on the fault type.

Controls & Internal Indications 5
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Section 5
Controls & Internal Indications
Modes Select Key-Switch
Some models of the Status Units have a ‘Mode Select’ key-switch. In the vertical position ‘Manual & Auto’ mode is
selected. Turning the key a quarter-turn clockwise, the ‘Manual Only’ mode is selected. The key can be removed in
either position.
The electrical operation of the Mode Select key-switch is as per the Mode input described in the previous Section.
Figure 5-1
Mode Select Key Switch
Manual Release
Some models of the status units are fitted with a ‘Manual Release’ push-button. This replicates the action of the man-
ual release control at the main Control Panel and once activated will start the extinguishant release sequence.
A plastic seal is provided in the accessory pack and should be fitted to the manual release flap with a piece of thin
wire to provide an indication if the Manual Release has been tampered with.
Figure 5-2
Manual Release Push-Button
Figure 5-3
Manually Activating Extinguishant Release Process
Mode
Select
Mode
Select
1 2
Extinguishant Release
Pull Down - Push Button
Manual
1. Auto & Manual Mode
2. Manual Only Mode

Controls & Internal Indications 5
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Processor and Watchdog Reset Switches
The status unit is controlled by a microprocessor, which will re-start itself and continue to run if it stops.
To ensure that the unit is not being subjected to continual, undue interference which may effect its proper operation,
a CPU fault indicator is latched on and a fault condition signalled to the Control Panel.
If a processor re-start has occurred, this latched fault condition will need to de reset by pressing the WDOG RESET
button on the bottom of the PCB.
A switch is also provided to manually re-start the processor PROC RESET. This switch can be used while connected
to the system to ensure that unit starts and establishes communication with the Panel in a controlled and expected
manner.
Figure 5-4
Processor and Watchdog Reset Switches
Internal LED Indicators
An extinguishant fault indication at the Control Panel may mean that there are faults at one or more status units. The
status unit fault indications are located along the bottom of the PCB and are as follows:
COM
This LED indicates that the data communications connection to the control panel is not present. This may be be-
cause the data lines are connected with reverse polarity or are not connected. Check RS485 IN and OUT connec-
tions.
HOL
This LED indicates that the HOLD input is open or short circuit. Check that the correct end of line resistor is con-
nected to the HOLD terminals or at the end of the wires connected to the HOLD input and that the HOLD input is
not short circuited.
IMPORTANT NOTE: When there is a fault on the HOLD input then the HOLD function is invoked which means that
the extinguishant release will not operate until this condition is cleared.
MOD
This LED indicates that the MODE input is open or short circuit. Check that the correct end of line resistor is con-
nected to the MODE terminals or at the end of the wires connected to the MODE input and that the MODE input is
not short circuited.
FUSE
This LED indicates that the electronic fuse has operated. Under this condition, the status unit is not operational. This
may be due to incorrect polarity of the power connection or a failure on the unit itself.
Processor Reset Watchdog Reset

Adding/Removing Status Indicators & Ancillary Boards 6
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Section 6
Adding/Removing Status Indicators & Ancillary Boards
Sigma ZXT/XT Status Indicators and Ancillary Boards can be connected to ZXT Extinguishing Control Panels to ex-
pand the performance and functionality of the system.
A single Sigma ZXT Panel can support up to 7x Status Indicators and 7x Ancillary Boards, connected to the RS485
data bus.
Man-1453 will provide more details on installation of Status Indicators, Man-1095 will provide further details on in-
stallation of Ancillary Boards.
This section of the Manual details how to register Status Indicators and Ancillary Boards onto a ZXT Extinguishing
Panel and assumes are all necessary wiring, link and switches are completed as detailed in the relevant installation
Manuals Man-1453 and Man-1095.
Adding a Status Unit to a ZXT
Sigma ZXT & Sigma XT Status Indicators are supported and these instructions apply for both variants:
1. Check wiring and address switch settings on each unit connected to the ZXT.
Important! Double addressing of Status Indicators can cause performance issues therefore it is important to check
unit addresses before powering the system.
2. Power-up the Panel and Status Indicators. The ZXT will automatically identify any Status Indicators, their
addresses and will indicate them as UNEXPECTD on the ZXT LCD as shown in the screen-shot below.
Note. An unexpected device is one detected by the Panel which has not been registered onto the configuration. Un-
installed Status Indicators will show all LED’s illuminated and will sound any buzzers until install is complete.
Figure 6-1
Unexpected Status Indicator
3. To install the Status Indicators enter the Engineering Menu (Access Level 3) on the LCD and select the CONNECTED
DEVICES menu option.
Figure 6-2
Connected Devices
SI .1 1 IN1
UNEXPECTED
XEVENTS CONTROLS
TUE 01 JAN 2019 18:16:15
*****ENGINEERING MENU*****
>CONNECTED DEVICES..
SYSTEM SETTINGS..
USER SETTINGS..
CIE ZONE SETTINGS..
ECD SETTINGS..
PROG I/P SETTINGS..
xBACK goto menu

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4. In the CONNECTED DEVICES screen, select the REMOTE BUS option to open the REMOTE BUS STATUS
screen.
Figure 6-3
Remote Bus
5. The REMOTE BUS STATUS screen provides a synopsis of what devices are connected and whether they have
been installed on the panel.
Figure 6-4
Remote Bus Status
6. Below the screen header is a line showing the status of individual devices, the left and right arrow buttons can
be used to scroll through the addresses and see the status of each address.
The addresses 1-7 are shown for each group of Status Indicator/s Units and Ancillary Boards/s (ANC).
Status will be shown as OPERATIONAL, NONE, UNEXPECTED or MISSING. A symbol will be displayed for
each device beneath its corresponding address number.
The table below provides an overview of Remote Bus Status indications:
Symbol Status Description
OPERATIONAL
Indicates the device with this address is regis-
tered onto the panel and is working correctly.
NONE
Indicates there is currently no device associated
with this address.
UNEXPECTED
Indicates a new device has been added to the
ZXT panel SI Bus which has not yet been regis-
tered on the panel. Unexpected devices will be
indicated as ageneral fault on the ZXT panel.
MISSING
Indicates a device has been removed or is no
longer communicating with the system.
****connected devices****
>remote bus..
xBACK goto menu
****remote bus status****
sI AT 1 :UNEXPECTED
-SI-
1.3.5.7
-ANC-
1.3.5.7
xBACK INSTALL

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The following screen-shot shows an example of a system with OPERATIONAL, NONE and UNEXPECTED devices.
Figure 6-5
Example Remote Bus Status
7. To add a device use the left and right arrows to select the unexpected device to add in the device status line
and press the enter key (INSTALL). This will log the device onto the panel and the unexpected device fault will
clear.
The status will change to OPERATIONAL in the status line and the graphic symbol for this address will change
to □. The status LEDs should display their normal state and any buzzers will stop sounding. Complete this for
all unexpected devices until all devices are logged on to the panel.
****remote bus status****
ANC AT 1 :UNEXPECTED
-SI-
1.3.5.7
-ANC-
1.3.5.7
xBACK INSTALL

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Removing a Status Indicator
The following instructions detail how to remove a Status Unit from a ZXT system, this process is the same for both
Sigma ZXT and Sigma XT Status Indicators.
Important! For safety reasons power must be removed from the ZXT control panel before carrying out any modifi-
cations to an extinguishing control system.
1. With the system powered down disconnect the device from the circuit and make the circuit good.
2. Power-up the Control Panel and the LCD should show a missing device fault with details of the device and
device address that is missing, see screen-shot below. A missing Status Indicator will also activate a hold oper-
ated status this is due to the monitored hold input on the removed Status Indicator not being present.
Figure 6-6
Missing Status Indicator
3. Enter the Engineering Menu (Access Level 3) and select the DEVICES CONNECTED option and then select
the REMOTE BUS option to open the REMOTE BUS STATUS screen.
4. The REMOTE BUS STATUS indicates the missing Status Indicator with the following symbol Using the left
and right arrow buttons scroll to display the address of the missing device on the status line.
5. To remove the device from the ZXT configuration press the enter button (UNINSTALL) the status line for this
address will show none and the graphical status icon will show
6. The Panel will still indicate a hold operated state as this is a latching condition. Complete the removal of the
Status Unit by pressing the ‘Reset’ button on the fascia to clear the hold operated event.
Note: Status Indicators can be un-installed from the configuration while being left as part of the physical circuit, how-
ever this will cause the Status Unit to flash all LED’s and sound its local buzzer (if fitted) to indicate a ‘comms’ fault.
SI .1 1 IN1
MISSING
XEVENTS CONTROLS
TUE 01 JAN 2019 18:11:15