Duomo BX444-Mc Manual de instalação e do utilizador - Página 6
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Configuring The BX444-Mc
The BX444-Mc has two DIP switches on the PCB. The left switch is used to control the sensor connected to the system.
The right switch is used to configure the controller itself.
The BX444-Mc can be configured to provide several modes of operation.The configurable parameters
are:
Switch 1 on any of the 1st 4 double DIP switches
Zone ON or OFF - The BX444-Mc will not look for a sensor on a given zone if
the switch is moved to the OFF position. It is not necessary to remove the
return cable from the sensor.
Example shows Zone 1 On, Zone 2 On, Zone 3 Off, Zone 4 On
Switch 2 on any of the 1st 4 DIP switches
Type of gas to be sensed. These are labelled as GAS or CO. The symbols on
the front fascia of the detector are EN standard symbols and refer to any
explosive or toxic gas. If toxic gas, e.g. carbon monoxide is to be sensed on
a given zone move the switch to the CO position. If explosive, e.g. natural
gas, LPG, hydrogen etc. move the switch to the GAS position.
Example shows Zone 1 Explosive, Zone 2 Toxic, Zone 3 Explosive,
Zone 4 Explosive
Switch 1 on 2nd DIP switch set
Positive safety determines the condition of the main alarm relay and
hence the operation of the gas valve. When it is 'ON' the relay is in a
normally open state. When it is 'OFF' the relay is in a normally closed state.
NOTE: This affects how the gas valve operates and means that you may
need to change how it is wired to the BX444-Mc.
Example shows Positive Safety on
Switch 2 on 2nd DIP switch set
Main Alarm relay actuation method. This can be configured to provide
either a latching or a temporary alarm operation. When the main alarm is
actuated in an alarm condition if the switch is in the 'C' position the relay
will remain in this position even after the concentration of gas has
reduced below the alarm threshold. If the switch is in the 'I' position the
main alarm relay will actuate for 60 seconds and then if the level of gas has
dropped will return to the volt-free main alarm relay to the running
condition.The indication on the panel fascia and the audible alarm will still
indicate main alarm. This mode of operation is used when using manual
reset gas valves and battery back-up systems for extending standby
battery life.
Example shows detector configured for a latching main alarm
Main alarm switch in 'I' position
Gas Sensed
Main Alarm relay
Reset Pressed
w: www.duomo.co.uk
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1 minute
Main alarm switch in 'C' position
Gas Sensed
Main Alarm relay
Reset Pressed
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Time
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© Duomo (UK) Ltd. 2016