Product Manuals/Man-1096M_SyncroAS Marine 16 Page 21 of 38
17. Power supply
The control panel is fitted with an EN54-4 approved 2.3 Amp power supply and battery charger capable of charging up to 9Ah
batteries. A separate power supply should be used if larger batteries are required.
The power supply requires a 230V AC mains connection to the fused, mains terminal block in the top left corner of the back box.
The power is split between the charging circuit and power supply such that a maximum of 1 Amp is available to charge the batteries
if required, which leaves 2 Amps to run the control panel and peripherals. If the batteries are fully charged and do not require any
power, the full 3 Amps is available to run the control panel and sounder load.
The power supply incorporates sophisticated monitoring of the condition of the power system. The battery charging output is
temperature compensated to maximise the service life of the batteries.
The following fault conditions are signalled at the control panel: -
MAINS FAILED
BATTERY DISCONNECTED
BATTERY LOW VOLTAGE
EARTH FAULT
The mains fuse fitted is a T1.6A 250V HRC 20mm type and must be replaced upon failure with a fuse of the same type to maintain
the safety rating of the power supply.
17.1 Aux. 24V supply
A separately fused auxiliary 24 Volt output is provided for powering additional I/O boards or other equipment connected to the fire
alarm system. When switching inductive loads such as relays, these should be adequately suppressed using a reverse connected
diode.
The Aux 24V supply fuse is of the self-resetting type and is rated at 500mA. Failure of the fuse is monitored by the system and
announced as "Aux. 24V fuse failed".
The impact on battery standby duration must be carefully considered when using the Aux 24 volt output. Constant use of the full
500mA capability of this output for instance would require an additional 15Ah of battery capacity.
Ideally, use of the Aux. 24V output should be restricted to powering a limited number of additional I/O boards or switching
equipment when an alarm condition occurs.
17.2 24V OUT terminals
The terminals on the circuit board marked 24V OUT should not be used for any part of the installation. These terminals are reserved
for powering additional equipment that is factory fitted only. Using these outputs to power equipment outside of the panel enclosure
will compromise the integrity of the system.
17.3 Remote PSU
The terminals marked Remote PSU are for the connection of a remote, EN54-4 compliant power supply. These terminals are used on
control panels that have an external power supply and larger batteries in cases where standby periods longer than 24hours are
required.
There are two sets of terminals which allow two transmission paths to be accommodated as required by EN54-4 section 6.6. A power
fault input is also provided to signal faults from a remote power supply on the Syncro ASM panel.
17.4 Battery capacity
To enable the system to continue to function in the event of a failure of the mains supply, batteries must be fitted. These are not
supplied with the control panel.
Batteries should be of the re-chargeable, sealed lead acid type. They should be new (less than six months old) and sized according
to the local codes of practice for the standby period required, preferably by measuring quiescent and alarm loads for the particular
hardware configuration installed or using the formula listed below to calculate the required capacity.
The battery capacity required can be calculated using the following information.
This table shows the panel current consumption but does not take into account device loads, additional I/O boards, or use of the
Aux. 24 Volt output. Systems using these facilities should have their battery size calculated according to the additional information
below.
PANEL TYPE QUIESCENT CURRENT ALARM CURRENT
Single loop stand alone 0.13A 0.3A
Two loop stand alone 0.195A 0.37A
Single loop with network card 0.190A 0.365
Two loop with network card 0.260A 0.430A
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