Man-1077
Syncro
Multi Loop Analogue Addressable
Fire Control Panel
Conventional Detection Board Manual
Man-1077
Issue 06 April 2014
Index
Page
1. General ................................................................................................................................. 2
2. Detection Inputs ..................................................................................................................... 2
3. Sounder Outputs .................................................................................................................... 3
4. Fire contact............................................................................................................................ 4
5. Fault contact .......................................................................................................................... 4
6. Addressing............................................................................................................................. 4
7. Jumper connection .................................................................................................................. 5
8. Power connections .................................................................................................................. 5
9. Power consumption – battery standby ....................................................................................... 6
10. Comms connections .............................................................................................................. 6
11. Indications ........................................................................................................................... 7
12. Specifications ....................................................................................................................... 7
13. Typical wiring scheme ............................................................................................................ 8
1. General
To further enhance the versatility of the Syncro fire alarm system, conventional detectors or call points can be
connected and integrated using the conventional detection board.
These boards have 4 monitored detection inputs, each of which can support up to 30 conventional detectors and
call points.
In addition to the detection inputs each board has two monitored sounder outputs and two volt-free changeover
contact outputs, one for fire and one for fault.
Up to 32 of these boards can be connected to the dedicated RS485 communications bus in the control panel giving the
capability of 128 conventional detection circuits and 64 sounder outputs.
The Conventional detection boards may be mixed on the RS485 bus with 6 way sounder boards, 16 channel I/O
boards or 8 way relay boards to provide a very flexible system of I/O to satisfy almost any requirement.
Detection inputs and sounder outputs are configurable in the same way as devices connected to the loops and all may
contribute to, or be acted upon, by cause and effect logic.
Standard Syncro control panels contain fixings for one Conventional detection board, Sounder board, Relay board or
I/O board, which can easily be connected using four small signal wires to the power and comms bus connectors within
the panel.
2. Detection Inputs
Detection inputs provide current limited, resetting power suitable for most types of conventional detectors. Monitoring
is achieved by fitting a 6K8 end of line resistor at the last device on the detection line. Power is removed from all
detection lines for 5 seconds when the reset button at the main fire control panel is pressed, thus resetting any
activated detectors.
Each detection input has a red and a yellow LED associated with it. The red LED illuminates when the detection input is
activated by a detector or call point and the yellow LED illuminates if the wiring to the detection circuit becomes short
circuited or if the end of line resistor becomes disconnected.
The inputs of the Conventional detection board are not suitable for the connection of intrinsically safe barriers. If
intrinsically safe barriers are required, these can be connected via loop modules manufactured by the suppliers of loop
devices.
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A maximum load of 1.6 milliamps may be connected to each detection input which allows around 30 detectors of most
types to be fitted. For an accurate calculation of the numbers of detectors that can be fitted this calculation may be
used :
(1600/quiescent current of detector in microamps) -1 = number of detectors that can be connected.
The characteristics of the detection zone inputs have been designed to carefully match those of Kentec K3000 series
conventional control panels and as such can be used as direct replacements for these or in any situation where K3000
control panels would be suitable.
The trigger resistance required to activate the zone is nominally 470 Ohms. The actual range of resistance that will
activate the zone is around 100 to 800 Ohms.
Detection inputs may be re-configured via the Loop Explorer configuration programme in the same way as all other
input devices. They cannot be made non-latching, but this should not be used when monitoring smoke or heat
detectors as the zone voltage is not removed when the panel is reset and therefore these conventional detectors will
not reset from the fire state.
3. Sounder Outputs
The two sounder outputs are open and short circuit monitored by fitting a 10K 0.25W resistor across the last device
fitted to the field wiring.
Each output is protected by a 1 Amp, self resetting electronic fuse. A short circuit or overload on one of the outputs
will not prevent the other outputs from operating.
All sounder devices used with the board must be polarised. Connecting non-polarised devices to the circuit will result in
a fault indication on the board and at the control panel.
Although each of the sounder outputs is fused at 1 Amp, consideration should be given to the rating of the power
supply that is powering the board.
When using many sounder outputs or high power sounder ouputs, use a separate power supply (see power supply
section).
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Sounder outputs can be used to provide monitored outputs for
other events using the Loop Explorer configuration programme.
4. Fire contact
A volt free changeover contact is provided which by default will operate upon any fire condition from one of the four
detection inputs. The contact can be re-programmed to operate upon other conditions using the Loop Explorer
configuration programme but will revert to operation in response to any of the detection zone inputs activating if
communication is lost to the Syncro control panel via the RS485 bus. The contact is rated at 1 Amp, 30 Volts DC
maximum.
5. Fault contact
A volt free changeover contact is provided which by default will operate upon any fault condition on the monitored
inputs or outputs on the detection board. The contact can be re-programmed to operate upon other conditions using
the Loop Explorer configuration programme. The fault contact will operate if communication is lost to the Syncro
control panel via the RS485 bus and upon total power failure. The contact is rated at 1 Amp, 30 Volts DC maximum.
6. Addressing
Up to 32 Conventional detection, Sounder, Relay or I/O boards may be connected to a control panel and in order for
the panel to recognise them individually; each board must be allocated an address.
This is done via a DIL switch (as is used on many field devices) and setting a binary number. Care should be taken
where more than one board is used to give each board a unique address setting.
Some example address number settings are shown below
6
ADDRESS 1
6
ADDRESS 5
6
5
5
4
3
2
4
3
2
5
4
3
2
1
1
1
Shows switch actuator in the ON position.
For Address 32 all switches must be off.
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ADDRESS 21
Switch Number – 1 2 3 4 5 6
Value – 1 2 4 8 16 not used
7. Jumper connection
The last board connected to the RS485 communications bus, must have a terminating jumper fitted at position J2 as
shown here. Only one board connected to the RS485 bus should have a jumper fitted.
This jumper should be fitted even if only one board is connected to the bus.
Jumper J2
8. Power connections
The Conventional detection board requires a nominal 24V DC supply. This can be between 21 and 30 volts DC, a
voltage range, which suits battery-backed systems.
The total power consumption of the boards must be considered when connecting a power supply. Each sounder output
is fused at 1 Amp which gives a potential current consumption of 2 Amps and each activated input will typically
consume 30 milliamps which could be another 120 milliamps.
If the total load connected to the panel (including any sounders connected to the loops or the standard sounder
outputs in the panel) exceeds the maximum available from the Syncro panel power supply, a separate power supply of
suitable rating should be connected to the power terminals of the conventional detection board.
Connections are provided for both incoming and outgoing power as shown below.
When using an additional power supply, a
volt free contact or open collector signal
which operates to signal power fault should
be connected to the PF input on the
detection zone board.
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9. Power consumption – battery standby
The power consumption of detection boards must be carefully considered when calculating battery standby.
Each detection board has a current consumption of 69mA and potentially 4X 0.0016 detector load which will require 24
X 75mA +25% = 2.25Ah of battery capacity per 24 hour standby period.
The unit should be able to be in full alarm state for half an hour at the end of the 24 hour standby period. Each input
when activated by a nominal 470 Ohm resistor will consume 30 milliamps so this will require (4 X .03) X 0.5 = 0.06 Ah
The sounders must be able to operate for half an hour at the end of the standby period so additional capacity of 0.5 X
total sounder load in Amps + 2.25Ah (consumption of board in full alarm) should be added to the required battery
capacity to cover this. Assuming a full sounder load this will be 0.5 X (2+ 0.2) Ah.
10. Comms connections
The panel communicates with the boards using a 2 wire RS485 data bus. This bus is available on the main termination
board in the control panel.
Connections to the boards within the control panel can be made with small gauge equipment wire. Connections to
boards mounted outside of the control panel should be made using a suitable RS485 data communications cable such
as Belden 9271.
Connections are provided for both incoming and outgoing comms as shown below.
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11. Indications
Red –
Operated LEDs
LED indicators on the zone board give some simple
diagnostic information and show that the boards are
communicating with the control panel.
Yellow –
Fault LEDs
The red LED (LED18) is used to show serial data
communication is being received from the control
panel.
This LED should be flickering at around 1 second
intervals.
If this LED is not lit, then the board is not receiving
data from the control panel and the comms
connection should be checked.
The yellow LED (LED17) will flicker briefly at around
1 second intervals when the board responds to the
main panel.
If this LED does not flicker then it is not responding
to the control panel and the comms connection
should be checked.
These simple indications are not designed to provide
detailed diagnostic help but should assist in
establishing whether boards are communicating
correctly with the control panel.
Red and yellow LEDs are provided for each of the
four detection zones and the two sounder outputs.
The yellow LED indicates an open or short circuit
fault on the input or output and the red LED indicates
that the input or output is operated.
Faults on the outputs are transmitted to the main
control panel.
Each of the two volt free relay outputs has a red LED
to indicate when the output is operated.
LED 17 Yellow
LED 18 Red
12. Specifications
Part number – S545
Supply voltage range – 21 to 30 Volts DC
Detection input end of line resistor value – 6K8 5%
Sounder output end of line resistor value – 10K 5%
Quiescent current consumption (power fault condition) – 69 milliamps
Full alarm current consumption (assuming 470R trigger resistance on all inputs) – 200 milliamps
Current per sounder output – 1 Amp maximum
Output contact rating – 30 V DC 1 Amp
Communications – RS485 two wire
Maximum distance from control panel – 1200 metres (subject to correct type of cable)
PCB size – 190mm X 74mm
Fixing centres – 51.5mm X 180mm
Cable capacity – 2.5mm2 per terminal
Operating temperature - -5o to +50o Celsius
Operating humidity - <95% non-condensing
Control panel compatibility – Compatible with control panels fitted with software version 3.96 upwards
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13. Typical wiring scheme
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