Fire Pro Sigma XT Manuel utilisateur

Fire Alarm and System Warning Signs

Local Control Stations

Installation and Operations Manual

Serial Communications Type

SIGMA-XT-FP Issue 3.5 March 2020

Sigma_XT_signs_m3.5.docx Page 2 of 14 
 
 
 
Contents 
1. Introduction............................................................................................................................................ 3 
 Sign Locations........................................................................................................................ 3 
 Local Control Stations (LCS) .................................................................................................... 3 
 External Devices..................................................................................................................... 3 
 Cable Penetrations and Terminations ....................................................................................... 3 
2. Mounting................................................................................................................................................ 4 
 Internal Signs......................................................................................................................... 4 
 External Signs ........................................................................................................................ 4 
3. Power and Data Connections ................................................................................................................... 5 
 Connecting Signs with RS485 Serial ......................................................................................... 5 
3.1.1. Connecting up to 3 Signs .......................................................................................... 5 
3.1.2. Connecting more than 3 Signs .................................................................................. 6 
4. Connection of Local Control Station (LCS)................................................................................................. 7 
 Power and Data Connection .................................................................................................... 7 
 Connection to Hold and Mode inputs ....................................................................................... 8 
 Mode input............................................................................................................................. 8 
 Hold input.............................................................................................................................. 8 
 Mode select keyswitch ............................................................................................................ 8 
 Manual release ....................................................................................................................... 8 
 Processor and Watchdog Reset Switches ................................................................................. 9 
 Internal fault indications ......................................................................................................... 9 
4.8.1. COM ........................................................................................................................ 9 
4.8.2. LOCK OFF ................................................................................................................ 9 
4.8.3. MOD........................................................................................................................ 9 
4.8.4. FUSE ....................................................................................................................... 9 
5. Setting up the Devices .......................................................................................................................... 10 
 Addressing Devices............................................................................................................... 10 
 Assigning Sign Function ........................................................................................................ 10 
6. Adding Devices to FIP Programming....................................................................................................... 11 
 Adding / Removing Devices at the FIP ................................................................................... 11 
7. Alternative Sign Arrangements............................................................................................................... 12 
 Mimic Signs / Connecting more than 7 Signs .......................................................................... 12 
 Alternative Arrangement of STATUS SERIAL (RS485) Circuit. .................................................. 13 
8. Troubleshooting.................................................................................................................................... 14 
9. Specifications........................................................................................................................................ 14 
 
 

Sigma_XT_signs_m3.5.docx Page 3 of 14

1. Introduction

SIGNS - The illuminated warning

a c

and

for a

alarm

guishant release

and System inoperative

have two levels of operation in which the top and bottom

halves of the

may be split to

show an

and then

text for a

for

both

can be activated at

LOCAL CONTROL STATION (LCS) may be required by standards for an installation. These units can be installed

using the serial bus and can be inserted anywhere in the 485 circuit.

A maximum of 7 devices (signs/LCS) can be installed when utilising the 485 Circuit.

Sign Locations

Locations where signs must be installed are defined by AS 1670. This manual does not replace reading the full

standard. Signs should be firmly mounted in appropriate locations. Interior signs are rated IP30 and are designed

for indoor use only. Weatherproof Signs are available. Signs are considered by the Sigma XT FIP to be OUTPUT

UNIT(S)

“FIRE ALARM/DO NOT ENTER” SIGNS - Installed outside the risk area, adjacent to all egress points and clearly

visible to anyone who may enter the risk area.

“FIRE ALARM/EVACUATE AREA” SIGNS - Installed inside the risk area, adjacent to all egress points and clearly

visible to all occupants of the risk area.

“EXTINGUISHING SYSTEM INOPERATIVE” SIGNS - Installed adjacent to the FIP and egress points, with additional

signs where necessary to be clearly visible to anyone who enters the risk area.

Local Control Stations (LCS)

LCS should be mounted firmly in an accessible location. The LCS is considered by the Sigma XT FIP to be a STATUS

UNIT(S). Status units have

monitored

inputs to which

remote

Hold or Mode select switches can be

nnected.

These

nputs

are monitored

for open and short circuit faults and

therefore

need to have a 470R 1W

trigge

resistor

connected

series with the

activating,

normally open switches and 6K8 0.5W end of

monito

ring

resistors connected

across the end of the

cables

Status Units are environmental class A and are 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. Operation

outside of these limits may render the equipment unsafe.

The 6K8 end-of-line monitoring

resistors

are supplied fitted to the Hold and Mode input terminals

External Devices

In addition to standard installation rules, there are some additional precautions that must be observed when

installing external signs.

SUNLIGHT - If an external sign is mounted in direct sunlight, it may be difficult to see if the sign is illuminated. In

this case it may be necessary to install a sun shield to make the illuminated sign visible.

DRIP LOOP - All external devices should be installed with cable penetrations coming through the bottom of the

sign, with a drip loop included to avoid the accumulation and ingress of water that may damage the electronics.

Cable Penetrations and Terminations

All cable penetrations into the sign enclosures must be protected by cable glands or bushings. Each sign enclosure

features a series of 20mm knockouts to accommodate these cable glands. The

of c

that the

will

accommodate

2.5mm

When preparing cable terminations, ensure that cables are not going to cross the front surface of the circuit board

as this will impair the light output of the unit, and the shadows generated by the cables will be clearly visible when

the sign is lit.

Sigma_XT_signs_m3.5.docx Page 4 of 14

2. Mounting

Internal Signs

Remove Cover and

Internal circuit board.

Mount using suitable

fixings.

Select cable entry point

and prepare.

Leave enough tail on

cable to ensure the

cable will not interfere

with operation of sign.

Weatherproof - External Signs

Mount Sunshade.

Remove cover and Internal

circuit board

Mount using suitable fixings

ONLY Mount to sunshade

surface –if the enclosure is

twisted on mounting it will crack

over time.

Best practice is to use silicon for

securing the lower half of sign.

Select cable entry point and

prepare. Cable entry must have

cable gland fitted. Preferred

entry though base of sign with

drip loop in cable.

Leave enough tail on cable to

ensure the cable will not

interfere with operation of sign.

Sigma_XT_signs_m3.5.docx Page 5 of 14

3. 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.

Connecting Signs with RS485 Serial

3.1.1. Connecting up to 3 Signs

For systems requiring up to 3 signs (or devices) to be installed, wiring is as follows:

Notes:

•FIP MUST BE POWERED DOWN BEFORE ANY CHANGES TO SIGNS.

•STATUS POWER - will support a maximum of 3 devices, including both signs and LCS.

•For more than 3 signs, a separate power supply is required from the 24VDC output on the FIP.

•STATUS SERIAL (RS485) - Maximum number of devices, including both Signs and LCS, for the 485

communications is 7.

Sigma_XT_signs_m3.5.docx Page 6 of 14

3.1.2. Connecting more than 3 Signs

For systems requiring more than 3 signs (or devices), wiring is as follows:

Notes:

•FIP MUST BE POWERED DOWN BEFORE ANY CHANGES TO SIGNS.

•Connections for the first 3 signs or devices remains the same as the previous wiring diagram.

•For more than 3 signs, a separate power supply is required from the 24VDC output on the FIP.

•STATUS SERIAL (RS485) - Maximum number of devices, including both Signs and LCS, for the 485

communications is 7. RS485 connection remains the same for all 7 devices.

Sigma_XT_signs_m3.5.docx Page 7 of 14

4. Connection of Local Control Station (LCS)

Power and Data Connection

The LCS can be installed in any order on the STATUS SERIAL (RS485) circuit, depending on its location. The LCS

must be installed on the STATUS SERIAL (RS485) circuit. It cannot be used as a mimic device. More information

is available on the Local Control Station Manual.

For systems requiring a LCS to be installed, wiring is as follows:

Notes:

•FIP MUST BE POWERED DOWN BEFORE ANY CHANGES TO SIGNS.

•If installed as one of the first 3 devices on the STATUS SERIAL (RS485) circuit, STATUS POWER

may used for the power supply. STATUS POWER will support a maximum of 3 devices, including

both signs and LCS.

•If installed after the first 3 devices on the STATUS SERIAL (RS485) circuit, a separate power

supply is required from the 24VDC output on the FIP.

•STATUS SERIAL (RS485) - Maximum number of devices, including both Signs and LCS, for the 485

communications is 7.

Sigma_XT_signs_m3.5.docx Page 8 of 14

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 connected 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

trigger 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.

Mode input

The mode input is provided to allow connection of remote mode switch 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 operated 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.

Mode select keyswitch

Some models of the status units have a mode select switch. The operation of the Mode select switch is as per the

Mode input above.

Manual release

Where fitted, a manual release button replicates the action of the manual 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.

3 Processor and watchdog reset switches

Sigma_XT_signs_m3.5.docx Page 9 of 14

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 for any reason such as severe

electrical interference such as an electrical storm.

To ensure that the unit is not being subjected to continual, undue

interference which may affect 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 be 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 the status units are connected

to the system to ensure that the unit starts up and establishes

communication with the panel in a controlled and expected manner.

Internal fault indications

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:

4.8.1. COM

This LED indicates that the data communications connection to the control panel is not present. This may be

because the data lines are connected with reverse polarity or are not connected. Check RS485 IN and OUT

connections.

4.8.2. LOCK OFF

This LED indicates that the Lock Off input is open or short circuit. Check that the correct end of line resistor is

connected to the Lock Off terminals or at the end of the wires connected to the Lock Off terminals and that the

Lock Off input is not short circuited, or the wiring open circuited.

IMPORTANT NOTE: When there is a fault on the Lock Off input then the Lock Off function is invoked which means that the

extinguishant release will not operate until this condition is cleared.

4.8.3. MOD

This LED indicates that the MODE input is open or short circuit. Check that the correct end of line resistor is

connected 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.

4.8.4. 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.

Sigma_XT_signs_m3.5.docx Page 10 of 14

5. Setting up the Devices

Sign Circuit Board

LCS Circuit Board

Addressing Devices

Before adding a device to the FIP’s programming, each device connected to the STATUS SERIAL (RS485) circuit

must be given an individual address. The FIP MUST BE POWERED DOWN BEFORE ANY CHANGES TO DEVICES.

IMPORTANT - Devices with the same address will cause an intermittent fault to be displayed.

Assigning Sign Function

In addition to addressing, signs connected to the STATUS SERIAL (RS485) circuit require their function to be set

using the DIL switches on the bottom of the sign circuit board. The functions of the upper and lower halves of the

sign are split across 3 banks of DIL switches. The recommended sign functions for each type of sign are:

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