SMS SenTRI4 User manual

Installation instructions
SenTRI4 Control panel
based Fire detection and alarm system
SenTRI 4 Fire System
Designed to EN54 Pt 2 & 4
Healthy
15:45
Fault
System Fault
Test
Fire
Power
Power Fault
Disablement
Sounder
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 32
Zones
Previous
Next
Delay
Verify
EN54 Parts 2 & 4
f o u r
0XXXX

2
Contents
Contents
Preface 3
Associated Documents 3
Symbols on product 3
Conventions 3
Abbreviations 3
Notes 4
Installation 4
Second x 4
Fixture and ttings 4
As tted drawings 4
Cable type and routing 4
Fire sensor covers 4
Earth continuity 5
Power supply 5
Mains supply 5
Local Manual Call Point 5
EN54 information 6
Optional functions with requirements of
European standard 6
System wiring 7
Cable separation 7
Lightning protection 7
Cables for a SENTRI4 system 8
Cable for wiring Mains Supply 8
Cable for wiring system equipment 8
Cable length 8
Cable for wiring to RS232/RS485 ports 8
Cable length 8
Loop cables 9
Enhanced loop cables 9
Standard loop cables 9
2.5mm² Loop cable (2.5Km loop) 9
Network cables 10
Enhanced Network cables 10
Standard Network cables 10
Loop circuit design 12
Loop Card 12
Condition of use of Loop Card 12
Battery Standby and Loop load calculator
tool 13
Loop Cable length 13
Loop device load and length
calculations 13
What are Lumped and Distributed
alarm device loads? 13
Distributed alarm device load 13
Lumped alarm device load 13
Typical SENTRI4 System 14
SENTRI4 panel 15
Features 15
Technical data 16
Control panel 16
Batteries 18
Power supply 18
Panel installation 20
Mounting & cable entry points 21
Semi-Flush xing the control panel 22
Cable termination on enclosure 23
Wiring tests 23
Mains & battery supply cables 23
Mains supply 24
Terminals for external circuits 25
Device loop circuits 26
Master alarm circuits 27
Clean contacts 27
Auxiliary relay circuits 28
RS232 / RS485 Communication 29
Wiring a Remote printer 30
Copper Network 31
Network connections 32
Network wiring 32
Network cable screen continuity 33
How to minimise cross talk 33
Domain Bridge across Networks 34
Methods of domain bridging 34
Star connection 34
RS232 Domain bridge using
Domain IO card 35
On completion of wiring installation 35
SenTRI Sensors 36
Base 36
IP21 Base 36
Indicators 36
Dust Cover 36
Siting 37
Do’s and Don’t 37
Metal back box 38
In - Out wiring to SenTRI bases 38
Programmable input/output 39
Tools for SenTRI Sensor 40
SenTRI4 Panel and Sensors parts 41

3
SenTRI4 fire system
Preface
This is the second issue of the Installation
instructions for the SENTRI4 panel having
the enhanced loop capabilities. This
issue contains explanation of symbols on
products and revised membrane.
These instructions must be read in
conjunction with BS 5839 : Part 1,
which is the Code of Practice for
design, installation, commissioning and
maintenance of systems in non-domestic
premises.
Associated Documents
SENTRI4 and SENTRI2 panel based
system - Operating instructions
Log book
Symbols on product
DANGER
Electric shock hazard.
Protective Earth connection
terminal.
The WEEE symbol. It indicates the
product is to be recycled and not thrown
away.
The CE compliance logo. This
product is in conformity with the
relevant European Union harmonisation
legislation.
RoHS
The RoHS compliance logo.
The RoHS directive restricts the use of
certain hazardous substances commonly
used in electronic and
electronic equipment.
Conventions
This is a note to highlight
important text that is
normally hidden in the
main text.
This is either a caution
to prevent damage to the
equipment or a warning
to inform of dangerous
conditions that may result
in injury or death.
Abbreviations
ac Alternating current
dc Direct current
EOL End of line
ESD Electrostatic discharge
I/F Interface
IO or
I/O
Input Output
IP Ingress protection
LCD Liquid crystal display
LED Light emitting diode
LPCB Loss prevention council
certication board
MCC Master control card (CARD 0)
MCP Manual call point
MICC Mineral insulated copper cable
N/C Normally closed
N/O Normally open
OC or
O/C
Open circuit
PCB Printed circuit board
PSU Power supply unit
QB Quick blow (fuse)
SC or
S/C
Short circuit
TAnti-surge (fuse)

4
Installation
Notes
The power-up of the control panel
and commissioning of the system is
done by the Servicing organisation.
Installation
It is recommended that the installer follow
the general requirements of
BS 5839 : Part 1 : 2013, which is the code
of practice relating to re detection and
alarm systems for buildings. The installer
must follow the relevant parts of
BS 7671 : 2008 Requirements for
Electrical installations, IEE wiring
regulations 17th edition if installation is in
the United Kingdom.
Second x
To prevent the possibility of damage
or dirt degrading the performance
or appearance of the products, the
installation of second x items should be
delayed until all major building work in the
area is complete.
The installation of all
outstanding parts and the
panel power up is usually
carried out during system
commissioning.
Fixture and ttings
It is the installers responsibility to provide
adequate xtures and ttings for the type
of construction surface onto which a
product is to be installed, whilst utilising
the xing points on the respective
product. As an aid to this decision, the
weight and overall size of each full
assembly together with implications on
cable entries and routing should be taken
into consideration.
All these procedures
assume that the cable,
gland, steel box (BESA
box) and other related
accessories are provided
by the installer.
As tted drawings
The installer should acquire site specic
information from the interested parties,
for details on the location of products
for installation. The acquired information
together with this guide and the relevant
standards should be used to assist the
work.
Each product assembly can be identied
from its package label. The contents of
all packages should be checked for any
discrepancies.
Cable type and routing
Appropriate attention must be given
to ensure the correct cable type is
installed in accordance with ‘as tted
drawings’, site specic information and
recommendations of
BS 5839 Part 1 : 2013. The cables must
be installed using cable manufacturers
recommended xing and accessories.
Fire sensor covers
Each re sensor may be supplied with a
plastic dust cover. If supplied, the cover
must be tted to prevent dust and dirt
from the building work contaminating the
re sensor.

5
SenTRI4 fire system
Earth continuity
All earth connection points should
be clean to provide a good electrical
conductivity path. To maintain the earth
continuity: all earth leads and ttings
provided should be installed. The loop
cable screen must be continued through
each system device on the loop circuit,
whether the earth is connected to the
device or not.
Do not use any part of
building structure for
earthing.
Some of the system products having
metal enclosures have a zinc coating
around the cable termination points,
the coating provides a good electrical
conductivity path for cable earth
termination. The zinc coating on metal
enclosures should not be damaged. Any
damage will expose bare metal, which
can corrode and make a poor earth
connection.
Power supply
The power to the system is derived from
the mains and battery supplies. Before
removal of a card or disconnection of
cable from the panel ensure both mains
and battery supplies are disconnected.
Mains supply
Mains supply to any re alarm control
and indicating equipment must be via
an unswitched 5A fused spur unit. A
disconnect device must be provided to
disconnect both poles and must have a
minimum gap of 3mm. The disconnect
device should be available as part of the
building installation and must be easily
accessible after installation is complete.
All mains powered
equipment must be
earthed.
Local Manual Call Point
To comply with the requirements of
EN54-2 : 1997 a conventional manual call
point must be installed near the Control
panel. The call point must be wired to a
monitored line input of an interface unit.
During commissioning of the system a
Command Build No 250 associated with
the monitored line input must be set up to
evacuate all sectors without delay.
Failure to install and
congure a local manual
call point in the manner
described above when
delays are set up on the
system will result in the
panel not complying to
EN54-2 : 1997.

6
Local Manual Call Point
EN54 information
Optional functions with requirements of European standard
The Control panel complies with the requirements of EN54-2 : 1997. In addition to
the basic requirements of the standard the panel conforms to the following optional
clauses:
Clause Description
7.8 Output to re alarm devices
7.11 Delays to action outputs
8.3 Fault signals from point
9.5 Disablement of each addressable point
10 Test condition

7
SenTRI4 fire system
System wiring
If instructed, the installer may need to terminate as well as connect the cables to the
appropriate terminal blocks.
Cable separation
Where the outgoing and return cables of a loop circuit covers more than the equivalent
of one zone they must not run together, for example, either close to the Control Panel
or in a service duct. There should be as much physical separation as possible between
the cables and the mechanical protection of the cable should be to a particularly high
standard. This is to minimise the risk of accidental damage to both cables.
Lightning protection
Where a loop cable is mounted to an external wall or between two buildings then
consideration should be given to the use of lightning protection devices.
There must be a good earth
connection to the voltage surge
protection device.
Control
Panel
1
1
2 2
Zone circuit
Sounder circuit
3
230V ac
Other loop devices
Control
Panel
1
1
2 2
Zone circuit
Sounder circuit
3
230V ac
3
230V ac
Other loop devices
4
Secure
Network
3
1
2
4
4
Loop voltage
surge protection
Mains 230Vac
voltage surge
protection
Input Output line
voltage surge
protection
Network
voltage surge
protection
Loop
powered
interface
Mains
powered
interface
SenTRI 4 Fire System
Designed to EN54 Pt 2 & 4
Healthy
15:45
Fault
SystemFault
Test
Fire
Power
PowerFault
Disablement
Sounder
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 32
Zones
Previous
Next
Delay
Verify
EN54Parts2 & 4
f o u r
0XXXX
SenTRI 4 Fire System
Designed to EN54 Pt 2 & 4
Healthy
15:45
Fault
SystemFault
Test
Fire
Power
PowerFault
Disablement
Sounder
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 32
Zones
Previous
Next
Delay
Verify
EN54Parts2 & 4
f o u r
0XXXX

8
Cable for wiring Mains Supply
Cables for a SENTRI4 system
The British Standard BS 5839 Part 1 : 2017 Code of practice for system design,
installation, commissioning and maintenance states the requirements for standard and
re resisting cables in Clause 26.2 sections d & e.
Cable for wiring Mains Supply
The mains supply cable to Control and Indicating Equipment must be a standard re
resisting type and should meet PH30 classication.
Cable for wiring system equipment
An approved cable must be used to wire system equipment to:
Loop circuit
Master alarm circuit
Auxiliary relay circuit
Input/output circuit and
Mains supply.
An approved cable for wiring to these circuits is the:
Mineral insulated cable (MICC) to BS6207:Part 1
For alternative cables refer to the complete list of alternative approved standard and
enhanced cables for wiring system equipment, see “Loop cables” on page 9.
Cable length
The recommended cable length for respective circuit see transmission path data for
specic circuit.
Cable for wiring to RS232/RS485 ports
An approved cable must be used to wire to RS232 and RS485 ports.
The recommended cable for wiring to an RS232 port or an RS485 port is the:
Belden No 9729 (UL Style 2493)
y2 twisted pairs
yEach pair individually screened 24AWG (7 strands x 32 AWG)
yCapacitance between conductors 39.4pF/m at 1kHz
yCapacitance conductor to screen 72.2pF/m at 1kHz
yTemperature range -30oC to +60oC
For alternative cables refer to the complete list of approved standard and enhanced
network cables for wiring to the RS232 / RS485 ports see ‘Network cables’ page 10.
Cable length
The recommended length of cable for respective circuit:
Upto 15m cable length for the wiring to RS232 port
Upto 1.2Km cable length for the wiring to RS485 port
Cables no longer available
7A cross bullet point mark show a cable that may no longer be commercially
available. Such a cable if already installed in a building may be suitable for reuse
where a site is being refurbished, consult with your electrical installer.

9
SenTRI4 fire system
Loop cables
There is a maximum limit
of 2Km loop cable usage
allowed per loop circuit.
This maximum limit is the
sum of the cable used on
main loop circuit, spurs
off main loop circuit, plus
cable runs to all input
/ output lines off loop
powered interface units
installed on the same loop.
There is a further
maximum limit of 100m
cable run allowed per
input/output line off loop
powered interface unit.
The device loop cable carries both data
and power, therefore its selection is
important. Note the following:
In countries where the European
EMC directive is in force, only EMC
Compliant cables are to be used.
The loop cable usage must not
exceed 2Km. This includes the cable
used on main loop and spur circuits.
Single pair cable must be used. It is
NOT permissible to run mixed loops
or outgoing and return pairs in a
multi core cable, due to inadequate
separation and possible electrical
interference problems.
Each core of the loop cable must be
1.5mm2 cross section area.
the cable screen must be capable of
being earthed at each system device
(outstation).
Red is the preferred cover sheath for
re applications.
The specied loop circuit cables are
also suitable for wiring master alarm,
auxiliary relay, input/output lines and
mains supply.
Enhanced loop cables
Approved cables for loop wiring
(EMC Compliant)
Draka Firetuf FT120 Enhanced -
FTPLUS2EH1.5RD
(formally Firetuf FT Plus)
Datwyler Pyrol Enhanced
Mineral insulated cable (MICC) to
BS6207:Part 1
Prysmian (previously Pirelli) FP PLUS *
Standard loop cables
Approved cables for loop wiring
(EMC Compliant)
AEI Cables FIRETEC *
7Alcatel cable PYROLON E *
distributed by Winstonlead
7BICC Pyrotenax FLAMESIL FRC *
Cavicel SpA FIRECEL SR 114H *
distributed by Cables Britain
Datwyler Pyrol Standard *
(previously LIFELINE)
Draka Firetuf EMC Standard 1.5mm2
FTEMC2EH1.5RDR
Draka Firetuf FTES2EH1.5 (previously
FTZ2E1.5 FIRETUF OHLS *) re
resistant data cable
Huber & Suhner RADOX FR *
Prysmian (formally Pirelli)
FP200 FLEX *
Prysmian (formally Pirelli)
FP200 GOLD *
Raydex CDT FG950 *
2.5mm² Loop cable (2.5Km loop)
The cable reference for
a 2.5mm2loop cable
is similar to 1.5mm2
cable, for example the
cable reference for a
Draka Firetuf 1.5mm2
is FTPLUS2EH1.5
and for a 2.5mm2it is
FTPLUS2EH2.5, consult
cable supplier.
For cables marked with an * see note on
the next page.

10
Network cables
The cables marked * utilise
laminated aluminium tape with a
tinned drain wire for electrostatic
screening. Under certain
environmental conditions galvanic
action may take place between
the aluminium and the drain wire.
This will severely degrade EMC
performance as the foil to drain wire
impedance will increase. Armoured
variants of these can also be used
for wiring a loop circuit.
Network cables
Enhanced Network cables
Approved cables for network wiring
(EMC Compliant)
Draka Firetuf FT120 Enhanced
FTPLUS3EH1.5
(Previously Firetuf FT Plus)
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y3 Cores, each having 1.5mm2cross
section area
7Fireshield Enhanced FSN G2000
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y3 Cores (1 pair + 1) and earth
yeach core having 1mm2cross
section area
Mineral insulated copper cable
800m maximum Panel to Panel or
Panel to Network node cable distance.
yBS6207: Part 1
y3 parallel cores
yhaving continuous metal sheath
encapsulating
yeach core having 1.5mm2cross
section area
ya red cover sheath (preferred for
alarm applications)
Prysmian (formally Pirelli) FP Plus*
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y3 Cores each having 1.5mm2cross
section area
Standard Network cables
Approved cables for network wiring
(EMC Compliant)
Belden Armoured equivalent
This cable being a two pair cable
to BS5308:Part 1 (type 2) 0.5mm2
(16/0.2mm).
600m maximum Panel to Panel or
Panel to Network node cable distance.
Belden No 9729 (UL Style 2493)
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y2 twisted pairs
yEach pair individually screened
24AWG (7 strands x 32 AWG)
yCapacitance between conductors
39.4pF/m at 1kHz
yCapacitance conductor to screen
72.2pF/m at 1kHz
yTemperature range -30oC to +60oC
Belden No. 9842 EIA RS485
Applications, O/A Beldfoil® Braid
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
Must have following characteristics:
y2 twisted pairs
y24AWG (7 strands x 32 AWG)
conductors
yCharacteristic impedance -
120ohms
yCapacitance between conductors -
42pF/m at 1kHz
yCapacitance conductor to screen -
75.5pF/m at 1kHz
Standard network cables continued
on the next page..

11
SenTRI4 fire system
Belden TR No. 89729
(Teon jacketed)
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y2 twisted pairs
yEach pair individually screened
24AWG (7 strands x 32 AWG)
yCapacitance between conductors
39.4pF/m at 1kHz
yCapacitance - conductor to screen
72.2pF/m at 1kHz
yTemperature range up to 200oC
7Datwyler PYROFIL 8750-U/R *
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y4 cores
yeach core having 1.5mm2cross
section area
7Delta Crompton Firetuf FDZ1000*
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y3 cores
Doncaster Cables Firesure Plus*
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y4 Cores (2- pair plus earth)
yeach core having 1.5mm2cross
section area
Huber & Schner Radox series FR
communication cable*
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y3 cores twisted triad screened
y1.5mm2 (7/0.42 stranded)
conductors
yNominal impedance 200 ohms
(1KHz)
yCapacitance - conductors 110pF/m
(1KHz)
yCapacitance - screen to core
210pF/m (1KHz)
yFire resistance tested to BS6387
category CWZ and IEC 331.
Prysmian (formally Pirelli)
FP200 Flex*
800m maximum Panel to Panel or
Panel to Network node cable distance
y3 Cores, each having 1.5mm2cross
section area
Prysmian (formally Pirelli)
FP200 Gold*
1.2Km maximum Panel to Panel or
Panel to Network node cable distance
y3 Cores
yeach core having 1.5mm2cross
section area
Prysmian (formally Pirelli)
FP 400 Armoured
800m maximum Panel to Panel or
Panel to Network node cable distance
y4 Cores, each stranded 1.5mm2
cross section area
For cables marked with an * see note on
the previous page.

12
Loop Card
Loop circuit design
It is important that redundancy is built into the system to
accommodate for future expansions and change of area usage in the
protected premises.
The number of devices on a loop circuit can be limited by the total number of
addresses available, the electrical load on the circuit, the maximum cable length and
other geographical considerations.
A loop circuit must not cover more than 10,000m2 of oor area of a protected site
In total a maximum of 200 devices are allowed per loop circuit.
Loop Card
The panel is supplied with one Post Sept 2014 enhanced Loop Card
(SENTRI4-LPC-EN). If more than one loop is required then acquire additional cards for
each additional loop for installation in card slot.
Condition of use of Loop Card
Up to 2Km loop length is possible with Sensor Sounder Strobe and Sounder
Strobe Mark 2 devices installed on a loop circuit. In this case a rough method for
calculating the loop load and loop cable length is shown in the leaet for the loop
card. For a precise loop load and battery standby calculation use the ‘Battery
Standby and Loop load calculator’ tool.
Up to 2Km loop length is possible with 782XX-XXNM range of Sensor Sounder
devices or a mix of 782XX-XXNM range of Sensor Sounder Strobe and Sounder
Strobe Mark 2 installed on a loop circuit. Again for precise loop load and battery
standby calculation use the ‘Battery Standby and Loop load calculator’ tool.

13
SenTRI4 fire system
Battery Standby and Loop load calculator tool
The ‘Battery standby and loop load calculator’ tool can be downloaded from
www.smstoolbox.co.uk website by registered users.
Loop Cable length
The loop cable length is dened as the sum of the length of cable used on the main
loop plus that used on all the spur circuits off the main loop having system devices.
Loop device load and length calculations
There can be up to 200 devices on a loop cable of up to 2Km when using Loop Card
(SENTRI4-LPC-EN), where both device count and cable length are dictated by the
number of alarm devices on the loop and how they are positioned, distributed or
lumped together.
What are Lumped and Distributed alarm device loads?
Example of Lumped alarm device load
SENTRI4
Control panel
AV AV
AV AV
AV
AV
AV
AV
Where 35% of the alarm devices are
lumped together in 1/4 segment , , or of a loop.
AV
AV
C
D
AV
This example
shows lumped devices
along cable length .
SENTRI4
Control panel
AV AV
AV
AV
AV
AV
Distributed alarm devices are evenly
spaced along the entire length of the loop cable
from end to end.
AV
AV AV
AV AV
AV
AV
AV
AV
Example of Distributed alarm device load
AV
AV
- Audio Visual Sounder / Strobe
- Audio Visual Sounder Strobe devices
- Sensor only devices - Other system deviceskey:
B
A
CD
B
A
D
Distributed alarm device load
Where the alarm load is distributed along the entire length of the loop using:
1.5mm² cable, the loop length can be up to 2Km with up to 200 devices.
2.5mm² cable, the loop length can be up to 2.5Km with up to 200 devices.
Lumped alarm device load
If the alarm devices are lumped together on a loop circuit then there is a trade off
between the number of alarm devices and loop cable length possible, see also loop
card leaet which can be downloaded by registered users from www.smsre.co.uk.

14
Loop Card
Typical SENTRI4 System
The loop allows wiring of addressable devices like re sensors, alarm sounders, call
points, interface units, mimic and repeat panels, a combined maximum of up to
200 devices are allowed per loop circuit, a further limit on a loop circuit is determined
by device loading.
SenTRI 4 Fire System
Designed to EN54 Pt 2 & 4
Healthy
15:45
Fault
SystemFault
Test
Fire
Power
PowerFault
Disablement
Sounder
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 32
Zones
Previous
Next
Delay
Verify
EN54Parts 2 & 4
f o u r
0XXXX
SenTRI 4
Control Panel
Repeat Panel
Conventional 2-wire
system equipment
Conventional 2-wire
system equipment
230V ac
Magnetic door
release
230V ac
230V ac Single control as per
4-channel interface
Spur
Optional Loop circuit 2 to 4
Input output signals
may be used to control
and monitor:
Plant equipment
Building management system
Conventional
Sounders
(Two master
alarm circuits)
400mA per circuit
Two auxiliary relays
contacts
rated 1A @ 24Vdc
Clean contacts rated
1A @ 24Vdc
T
Tx Rx
System Devices (Outstations)
- Manual Call Point
- End of Line Unit
- Magnetic door release
Conventional System Products
- Alarms
- Conventional Fire Detectors
- Manual Call Point
Loop circuit 1
TS
- Beam sensor
Transmitter and receiver
Tx
Rx
S
- Sounder & Strobe Unit
Repeat
indicator
panel
RS232
Port 0
Port 1 / 2
230V ac Zonal Mimic Panel
Secure Network loop circuit
RS485
- T Breaker
T
S
- Sensor, Sounder & Strobe
S
S
EN54Parts2& 4: 1997
- 4-Input/Output
Mains powered interface unit
- 1-Input
loop powered interface
1
i
- 1-Output + Confirmation
input loop powered interface
1
o/i
- Mains output
loop powered interface
1
o
- 4-Input/Output
loop powered interface
4
i/o
4 i/o
MP
1
o/i
1
i
4 i/o
MP
230V ac
S
S
S
S
S

15
SenTRI4 fire system
SENTRI4 panel
SenTRI 4 Fire System
Designed to EN54 Pt 2 & 4
Healthy
15:45
Fault
System Fault
Test
Fire
Power
Power Fault
Disablement
Sounder
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 32
Zones
Previous
Next
Delay
Verify
EN54 Parts 2 & 4
f o u r
0XXXX
042cc
The SENTRI4 panel
(SENTRI4) is an
analogue addressable
re alarm panel
designed to the
requirements of
EN54-2 : 1997 and
EN54-4 : 1997
The panel can
accommodate up to 4 loop circuits for the
connection of Sentri range of analogue
and addressable devices. The panel has
an integral mains derived power supply
and integral batteries. The batteries
supply standby power in the event of
mains power failure. A lockable front door
prevents unauthorised access to re
alarm controls but allows all of the
indicators to be seen. The panel has
integral zonal indicators to provide zone
re or fault indications. Two push button
controls are located on the front door
below the display that enable Fire
messages to be scrolled in the event of
multiple res. The panel is designed for
surface or semi-ush mounting with rear
and top cable entry points.
Features
Analogue addressable re detection
and alarm control
Supports up to four loop circuits per
panel
Up to 200 addressable devices can be
connected to a loop circuit. Devices
like sensors, MCPs and interface units
etc.
Two master alarm circuits
Optional RS485 to connect to a
Repeat Indicator panel
Optional RS232 to connect to another
control panel (domain bridge) or
external printer
USB for commissioning tool
connection
Two sets of auxiliary relay change
over contacts congurable to operate
with re, fault or disablement event
One set of clean voltage-free change
over contacts that operates with re
events
Standby supply to power the system
during mains failure
LCD alphanumeric display with back
light to show event information
Integral 32 zone LED indicators (with
First re steady / ashing or disable
integral zone indication’s options)
LED lights for event indication
Local buzzer gives audible sound to
announce events
Push button for essential controls and
menu options
Four programmable control buttons
(U1 to U4)

16
Technical data
Technical data
The SENTRI4 Control panel based system design has been carried out in accordance
with a quality management system, which incorporates a set of rules for the design
of all elements of the control and indicating equipment. The components of the
control and indicating equipment have been selected for the intended purpose, and
are expected to operate within their specication when the environmental conditions
outside the cabinet of the c.i.e. comply with class 3k5 of EN 60721-3-3:1995 .
Control panel
Standard Designed to EN54-2:1997 + A1:2006 (and include optional clauses
7.8, 7.10, 7.11, 8.3, 9.5 and 10)
Approval LPCB approved
Panel dimensions in mm
with outer door
height 543 x width 406 x depth 172
Panel weight
SENTRI4 10.2Kg approximately + 2 batteries
12V 21Ah battery - weight 6Kg each
Storage temperature -10ºC to +55ºC
Operating temperature -5ºC to +45ºC
Relative Humidity up to 90% (Non condensing) Temperature +5ºC to +40°C
Emission BS EN 6100-6-3 : 2001 Residential, Commercial & Light Industry
Class B limits
Immunity BS EN50130-4 : 1996 Alarm systems, Electromagnetic compatibility
Product family standard: Immunity requirements for components of
re, intruder and social alarm systems
Ingress Protection IP30
Colour Door: Grey (Pantone 422) Backbox: Graphite Grey (RAL 7024)
Loops The panel is supplied with a loop card for 1 loop circuit. It can
support up to 4 Loop circuits, using optional loop cards.
Network Supports connection of up to 31 panels in a secure loop copper
network, to give 1.2Km maximum between panels
RS232 and RS485
connections
The panel will require an optional IO Card to facilitate RS232 for
connections for domain bridging and remote printer. The maximum
cable length allowed for RS232 is 15m.
The panel has an RS485 port to accept the Repeat Indicator panels.
The Commissioning tool can be connected to the panel via the USB
port on the Master Control Card.
Devices per loop A maximum of 200 addressable devices are allowed per loop circuit.
Device labels Each device can be given a
32 character label for identication. Each MCP is restricted to
28 character label.

17
SenTRI4 fire system
Plug in Card slots
MCC / LCC -P1
IOC / N/W -P2
Loop 1 - P3
Loop 2 - P4
Loop 3 - P5
Loop 4 - P6
IOC / N/W-P7
IOC / N/W -P8
Master Control card - supplied
Input Output card / Network card
Loop card - supplied
Loop card option
Loop card option
Loop card option
Input Output card or Network card
Input Output card or Network card
Clean contacts 1 set of voltage free change over contacts rated 1A @ 24Vdc, active
with master alarms
Auxiliary relays
Aux relay 1
Voltage-free contacts rated 1A @ 24Vdc,
2 sets of change over contacts congured to operate immediately on
a Fire event. The relay is normally de-energised
Aux relay 2 2 set of change over contacts congured to operate immediately on
a Fault event. The relay is normally energised
The relays can be re-congured to operate with Fire, Fault or
Disablement event, with a maximum delay of up to 10 minutes and
can operate in a normally energised or de-energised state.
Master alarm circuits
voltage and current,
protection fuses
2 - (24 volts nominal)
400 mA max per circuit
MA1 - fuse 1A FS1
MA2 - fuse 1A FS2
(20 x 5mm) on Terminal card.
RS232 and RS485
connections
The panel will require an optional standard IO Card to facilitate
RS232 for connections for domain bridging and remote printer. The
maximum cable length allowed for RS232 is 15m.
The panel has an RS485 port to accept the Repeat Indicator panels.
The Commissioning tool can be connected to the panel via the
USB port on the Master Control Card.
Display Display - 8 lines by 40 character per line, back-lit, (Black characters
on green background, liquid crystal display)
Internal sounder Announces Fire & Fault events, plus give key-press conrmation
beep.
Indicators Fire (red) 32, Zones (red) hidden till lit, Verify (amber),
CB253 (red), CB254 (amber), Power (green), Fault (amber),
Disablement (amber), System fault (amber), Power fault (amber),
Sounder (amber), Test (amber) and Delay (amber)
Controls (with door
closed) Access level 1
Next and Previous buttons operable during Fire condition only
Controls (with door
open) Access level 2a
Sound Alarms, Silence Alarms, Reset, Cancel Buzzer, Verify, F1-F4
keys, Menu On/Off key, QWERTY key board, U1-U4 keys available if
congured to perform site specic actions by triggering of command
builds 251, 252, 253 and 254.
Controls (with door
open) Access level 2b
Customer (Customer PIN)
Access as level 2a plus access to complete level 2 menu
commands.

18
Technical data
Access level 3 Engineering (Engineers PIN)
Access as level 2b plus access to all level 3 menu commands.
Menus [Control], [Setup], [Information] and [Test Engineering] menus.
Logs Active Logs: Fire, Fault and Disablement
Historic log: All events
Event logs: Fault, Disablement, Warning, Supervisory, Exceptions
and Historic res. (up to 255 events)
Fire Log (up to 100 events)
Printer The integral printer if tted operates when the outer door is open.
The ‘printer menu’ include: ON, OFF, Line feed and Test print
controls. An optional remote printer can be connected to the panel.
Batteries
The batteries provide 24 hour standby supply plus power to alarm load for 30 minutes.
The ‘Battery Standby and Loop Load Calculator’ tool must be used to determine the
load on the loop to achieve the standby power in the event of mains failure.
Battery 24hr standby Batteries installed in the panel
2 x Powersonic 12V 21Ahr - (supplied)
Model number PG12V21 B
Temperature monitoring Inside the SENTRI4 panel for automatic adjustment of
battery charge voltage with change in temperature.
Always use the recommended replacement batteries, as there is
a risk of an explosion if incorrect battery is used. Dispose of used
batteries according to the manufacturer’s instructions.
Power supply
SENTRI4 panel has an Integral PSE model number: SENTRI4-PSU
Standard Designed to EN54-4 : 1997 + A1:2002 and A2:2006
Mains supply voltage and
fuses
230V -15% +10% 50Hz/60Hz
protected by: FS3 T3.15AH250V Ceramic (20 x 5 mm) on PSU
Input current - 1.4A
Nominal supply voltage for
master alarm circuits
24V +1V, -4V
Battery circuit(s) Terminals to connect to internally or externally housed
batteries. Batteries reach fully charged state in 72 hr.
Battery current with mains
disconnected
6.2A max.
Light indications To show the status of PSU
PSU Fuses Mains
44V supply
Battery charge circuit 2
FS6 T3.15A Ceramic
FS2 F3.15A Glass
FS7 F6.3A Ceramic Quick Blow for 24hr standby
All fuses 20mm x 5mm size
Storage temperature -10ºC to +55ºC
Operating temperature -5ºC to +40ºC

19
SenTRI4 fire system
Relative Humidity up to 90% (Non condensing) Temperature 0ºC to +45°C
Indicators LD1 - LD5 indicate RAM, ROM and EPROM status, error,
checksum and communication
EN54 Part 4 data
SENTRI4 PSU
with 24 hr standby
I min -> 780uA
I max a* -> max quiescent loop current -> 108mA @ 43.5V
I max b -> max alarm loop current -> 3.15A @ 46.4V
Ri max -> 0.9R
UVLO -> 20.7V ± 0.4V
*max a - Max loop current
27mA x 4 = 108mA quiescent for SENTRI4 panel
Primary DC Output Voltage 43V ± 5%
ripple Voltage (peak to peak) <1%
Hazardous voltages may still be present even when the indicators
are extinguished.

20
Panel installation
Panel installation
A SENTRI4 panel include the following parts:
Back box assembly with PSU to power the Control panel
Inner door
Moulded outer door
Loop Card (1- loop card supplied), can accommodate up to 4 maximum
Main Controller Card
SENTRI4 is supplied with 2x12V 21Ah batteries
Parts supplied in spares packs:
Part Qty - SENTRI4
Cable tie 3
Ferrite core
1
22K 0.5W Resistor 2
Battery lead
1
Spade tag 2
Link lead
1
iInstructions
1
20 x 5mm Fuse 6.3A QB Ceramic 1
20 x 5mm Fuse 3.15A AS Ceramic 1
20 x 5mm Fuse 3.15A AS Glass 1
Adhesive backed foam pad
1
Each battery pair of 2 x 12V 21Ah is supplied with:
4 x bolts 4 x spring washers
4 x washers