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Page  13

Sensors  installation  and  positioning

The  BX280-AX  control  unit  belongs  to  group  II  and  must  be  installed  in  a  safe  area;

Outside  the  ATEX  zone

,  however,  not  in  boiler  rooms  or  engine  room.

The  control  unit  must  be  accessible  and  visible  to  the  user.

The  BX280-AX  is  designed  so  that  it  can  be  mounted  into  electrical  panels.
The  Control  Unit  complete  cabinet  is  an  equipment  suitable  for  wall  mounting  and  is  powered  by  110/240
VAC  
with  IP20  protective  rating

When  installing,  it  is  good  to  use  the  normal  care  that  an  electronic  equipment  requires:
-  Install  the  equipment  away  from  excessive  heat  sources.
-  Avoid  liquids  coming  into  contact  with  the  control  unit,  remembering  that  its  external  structure  has  IP20
protective  rating  if  installed  in  the  electrical  panel,  it  takes  the  panel  protective  rating

Control  unit  installation  and  positioning

The  sensors  must  be  selected  with  an  IP  degree  depending  on  the  area  to  be  controlled  (Kitchens,
Boiler  Rooms,  Laboratory,  etc.)  by  selecting  one  of  the  probes  from  Beinat  from  IP30  to  ATEX.  
see
page  3

Position  of  the  detection  sensors

You  can  connect  many  types  of  remote  probes  to  this  unit.  Therefore,  they  should  be  positioned  at  different
heights  depending  on  the  type  of  gas  to  be  detected.

These  heights  are:
-  30  cm  from  the  lowest  point  of  the  floor  in  order  to  detect:

Heavy  gases  (L.P.G.  etc.)

-  30  cm  from  the  highest  point  of  the  ceiling  in  order  to  detect:

light  gases  (Methane,  etc.)

-  160  cm  from  the  lowest  point  of  the  floor  in  order  to  detect:

volatile  gases  (CO,  etc.)

It  is  important  that  the  remote  sensor  must  be  installed  bearing  in  mind  that:

1)  The  sensors  should  not  be  placed  near  the  appliances  to  be  controlled  (boilers,  burners,  industrial
kitchens,  etc.)  but  on  the  opposite  side.
2)  The  sensors  should  not be affected  by  smoke,  vapour,  moving  air,  as  they  could  distort  their  detection.
3)  The  sensors  should  not  be  placed  near  sources  of  heat,  ventilators  or  fans.
It  is  necessary  to  warn  that  the  sensors  of  the  gas  detection  probes  are  perishable  components,  whose
average  duration  varies  from  5  to  6  years  (ask  for  a  possible  table)  therefore  after  this
period,  they  must  be  replaced.
4)  The  operation  check  and the  ordinary  and/or  extraordinary  maintenance  must be  performed  at least  once
a  year.
When  the  fault  LED  turns  on,  the  sensor  must  be  replaced  by  a  specialized  technician.

  PROBE  INSTALLATION  INFORMATION

 

30 cm Light Gases

  30 cm Heavy Gases

160 cm Volatile Gases

Содержание BX280-AX

Страница 1: ...ty Select the gas type to be detected toxic or explosive Choose the relay functioning mode pulsed or continuous Choose deadband exclusion mode A TEST button checks the efficiency of both the unit and connected probe to ensure total control of the BX280 AX Thanks to the Omega type format small and large systems can be built by exploiting the modularity of the DIN rail in the previously set electric...

Страница 2: ...the appliance Cleaning Never clean the device with chemical products If necessary wash with a moist cloth Technical Specifications Mains Power 110 230VAC 50 60Hz 10 Secondary Power Through Battery max 1 2 Ah Optional not provided 12 V 10 Battery Charger max 1 2 Ah controlled by the microprocessor The battery does not need maintenance Power Demand 6 W max 230V Power Demand 5 W max 12 VDC Relay Cont...

Страница 3: ...SG895 Pellistor ATEX Zone 1 See catalogue 0 100 LEL 4 20 mA 5 Y e s N O SG580 Catalyt ic I P 6 6 Zone 2 See catalogue 0 100 LEL 4 20 mA 5 Y e s N O SGF100 Catalytic I P 6 4 Zone 2 Methane 0 100 LEL 4 20 mA 5 Y e s Y e s SGF102 Catalytic I P 6 4 Zone 2 L P G 0 100 LEL 4 20 mA 5 Y e s Y e s SGF104 Optical Fluores I P 6 4 Zone 2 Oxyg en In 4 20 mA 5 Y e s Y e s SGF106 SemiCondut I P 6 4 Zone 2 F R E ...

Страница 4: ... by the battery in the absence of mains and flashes when the battery voltage is less than 10 8 V 3 LED SCALE CONCENTRATION GAS These LEDs light up in sequence based on the increase to the gas dispersed in the environment a When the first led turns on the gas concentration level has reached the first pre alarm threshold b When the second led turns on the gas concentration level has reached the seco...

Страница 5: ...rding to current performance standards 12 DIP SWITCH of the deadband suppression of the sensor 1 and 2 Setting these two switches ON or OFF it is possible to enable or disable the suppression of the signaling of any sub range in the input signal in the corresponding input Instead over ranges will always be reported Both conditions are indicated by the flashing of the Explosive Gas LED of the corre...

Страница 6: ...sensors as shown in the figure Power supply 110 230 VAC C NC NO C NC NO C NC NO PH N 4 5 6 7 8 9 10 Fault Pre Alarm Main Alarm ACTIVATION AND DEACTIVATION OF THE SENSORS To enable disable the sensor 1 act on the first switch of SW4 first DIP SWITCH from left To enable disable the sensor 2 act on the first switch of SW3 second DIP SWITCH from left When a sensor is excluded all the memories will be ...

Страница 7: ... screen must be connected to the Gnd terminal of the interested area only on the side of the control unit The appliance must be connected to the power supply by means of a switch capable of disconnecting the poles in compliance with current safety standards and with a contact separation of at least 3 mm in all poles The installation and electrical connections of this appliance must be carried out ...

Страница 8: ...on of gas gradually increasing from the enabled sensors and it is therefore possible to control the switching on and off of the LEDs and that all switch relay enabling the loads connected to them Depending on the input signal of the remote sensors the control units can be found in the following working condition NORMAL MODE the control unit receives a signal from the sensors corresponding to a gas...

Страница 9: ...mA normal operation 21 mA Over range 23 mA fault The following figure shows the conversion between mA and the corresponding gas concentration 0 60 120 200 240 300 337 mA Fault zone Over range area Under range area Fault zone 7 2 0 10 4 16 8 20 14 7 4 3 6 22 ppm Linear 5 0 4 8 13 16 20 22 mA Fault zone Over range area Under range area Fault zone 7 2 0 10 4 16 8 20 14 4 4 3 6 22 LEL Linear 5 3 8 3 8...

Страница 10: ...s and eventual battery Page 10 Example of a label WARNING Before connecting to the mains power ensure the voltage is correct Carefully follow the instructions and the connections according to Regulations in force keeping in mind that the signal cables should be laid separate from the power cables An automatic cut off switch appropriately identified as devicesectioning of the detector should be inc...

Страница 11: ...oid valve Normally Closed with Positive Safety Connections of a solenoid valve Normally Closed without Positive Safety Page 11 110 230 VAC Electrical connection example If a 12Vdc solenoid valve is connected to BX280 AX and it does not work well Direct connection of 12VDC solenoid valves or sirens to BX280 AX is not possible An external power unit must always be used BX280 AX gives a max current o...

Страница 12: ...N 230 VAC 230 VAC If a 12VDC solenoid valve is connected to BX280 AX and it does not work well Direct connection of 12VDC solenoid valves or sirens to the BX280 AX is not possible An external power unit must always be used The BX280 AX gives a max current of 50mA Electrical Connections Connections to Positive Safety disabled and an external power supply for valve control and siren 12VDC ...

Страница 13: ...es of remote probes to this unit Therefore they should be positioned at different heights depending on the type of gas to be detected These heights are 30 cm from the lowest point of the floor in order to detect Heavy gases L P G etc 30 cm from the highest point of the ceiling in order to detect light gases Methane etc 160 cm from the lowest point of the floor in order to detect volatile gases CO ...

Страница 14: ... powered by the battery check that the 12Vdc power is correctly connected If the Fault LED lights up Check that the connecting cables from the BX280 ax to the probes are intact that the probes are properly powered and that the signal cable is correctly connected If the Over Load Probe LED lights up Check that the power polarity has not been inverted that no short circuit is present that the probes...

Страница 15: ...arked by two red parallels To enable maintenance mode based on regulations a manual command must be performed Follow the instructions below Once the manual command has been executed proceed as follows Plant maintenance RESET TEST Maintenance Test The simultaneous and prolonged pressing for 5 seconds of the TEST and RESET keys enables the test on mode in which the control unit does not switch the g...

Страница 16: ...xample sales points in case you buy a new and similar product local collection points waste collection center local recycling center etc By ensuring this product is disposed of correctly you will help prevent potential negative consequence for the environment and human health which could otherwise be caused by inappropriate waste handing of this product The recycling of materials will help to cons...

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