Microprocessor control
Wall mounted
16 zone protection (across 1 or 2 zones)
4 - 20mA signal input
Relay outputs (incl. fire alarm interface)
Positive safety feature
Measuring range 0 - 20% LEL/0 - 300ppm
IP65 protective rating
EN50194 for explosive gases
EN50291 for toxic gases
3 year guarantee
Application
Duomo is recognised within the gas industry for
providing a comprehensive range of low cost, high
reliability gas detection for many applications. We have
installed and commissioned natural gas and carbon
monoxide sensors in applications such as boiler rooms,
kitchens, car parks, aircraft hangers, factories and
shopping centres. The BX216 is the command centre for
the complete range of Duomo gas sensors. All Duomo
products are manufactured to meet relevant European
Normatives and proposals for explosive and toxic gases.
Features
The BX216 is a wall mounted microprocessor based gas
detector control unit. It can be configured to meet
customer requirements. The following parameters can
be changed using the on board menu:
Number of sensors from 1 to 16
Type of gas to be sensed (explosive or toxic)
Pre-alarm level for each sensor
The number of zones (1 or 2)
Main alarm relay action (latching or auto-reset)
Positive safety feature
Alarm logging function
Event history
The BX216 has five main terminal blocks for the
following;
The incoming mains supply
The alarm circuit wiring (including fault, siren,
pre-alarm and main alarm relays)
The power supply to the sensors
The 4 - 20mA return cable from the sensors
A 0 - 10V output to BMS proportional to the 4 - 20mA
return signal
The front panel has an LCD display showing the date,
time, current sensor levels and much more. LED's on the
panel indicate what alarm status the unit is in, as well as
any faults present on the connected sensors.
Operation
The BX216 can detect both explosive and toxic gases.
When the remote sensor detects the presence of the
target gas a 4 - 20mA signal is sent to the detector,
proportional to the level of gas. The BX216 then
operates a pre-alarm relay - used for remote sirens or
visual indicators. If the level of gas continues to rise then
the second pre-alarm is actuated. In the case of
explosive gases, when the gas reaches a preset level, the
main alarm relay is activated to break the electrical
supply to the gas safety shut-off valve (SSOV). The BX216
also has a separate volt-free sensor fault relay that
actuates if the correct return signal is not sensed by the
detector. There is also the provision of a fire alarm
interface. This controller can be interlinked with a fire
alarm so that in the event of a fire, it would shut down
the gas supply.
BX
3
16
Gas
Detector
w:
www.duomo.co.uk
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t:
01905 797989
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01905 774296
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©
Duomo (UK) Ltd. 2007
