2.3.5.5.2 EN54-13 Monitoring
The sounder outputs support monitoring with an Active EOL device to ensure circuit
integrity in accordance with the requirements of EN54-13.
The sounder circuits can be configured for
compliance with EN54-13 by programming
and the use of an Active EOL device. All
panel sounder outputs must be fitted with the
Active EOL device (Mxp-505)
The panel uses techniques to ensure that a
fault warning condition is reported if the circuit
resistance increases to a condition where the
voltage at the last device may fall below its
minimum operating voltage level. This is
compatible for load currents from minimum up
to maximum (1 ampere).
Install the Active EOL device at the end of the
sounder circuit instead of the normal EOL
resistor – this device is polarity sensitive.
Connect the Red lead to the sounder + signal
line.
Typical Sounder Arrangement.
OBSERVE POLARITY
The Active EOL device is polarity
sensitive.
The Active EOL is fuse protected –
however, if connected incorrectly
and the sounder circuit is activated,
the fuse will open and is not user
replaceable.
2.3.5.5.3 Sounder Circuit Lengths
The voltage drop on each alarm circuit should be calculated to ensure that the minimum voltage at the end of
the circuit exceeds the minimum required by each sounding device at the minimum alarm circuit output voltage.
The voltage at the end of the circuit is given by:
Minimum Alarm Voltage = V
OUT(MIN)
– (I
ALARM
x R
CABLE
)
Minimum Output Voltage (V
OUT(MIN)
) is V
BAT(MIN)
– 1.0V = 20.0V
Alarm Current (I
ALARM
) is the sum of the loads presented by the sounding devices in alarm.
Cable Resistance (R
CABLE
) is the sum of the cable resistance in both cores x cable length.
Cable Resistance (R
CABLE
) for 1.0mm
2
is 0.036Ω / metre
Cable Resistance (R
CABLE
) for 1.5mm
2
is 0.024Ω / metre
Cable Resistance (R
CABLE
) for 2.5mm
2
is 0.015Ω / metre
Insulation Resistance (Core-Core and Core-Screen)
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