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7.0 Maintenance

Little  or  no  maintenance  is  required  during  the  normal  working  life  of  the 

product. The Moflash Intrinsically Safe enclosures are resistant to most acids, 

alkalis  and  chemicals  and  have  been  designed  to  withstand  severe  weather 

conditions. However it is suggested that continuous supervision and periodic 

inspections may be required in relation to the requirements of the installation as 

per IEC 60079-17. 

To  avoid  the  possibility  of  a  potential  electrostatic  charge  build  up,  it  is 

recommended that the exterior of the product is periodically wiped down with 

a clean damp cloth. At this point a visual inspection is recommended to ensure 

that the product is in good working order and no damage has been sustained 

during its normal operation.

The enclosure is non-conducting and may generate an ignition-capable level of 

electrostatic charge under certain extreme conditions. It is the responsibility of 

the user to ensure that the equipment is installed in a location where it will not 

be subjected to external conditions that might cause a build-up of electrostatic 

charge on the surface of the unit,

8.0 Conditions for Use

The  Moflash  Intrinsically  Safe  Signalling  Range  uses  an  enclosure  rated  at 

IP66*.  To ensure that this rating is maintained once installed, a suitable cable 

gland must be used which matches this level of protection.  The base of the unit 

contains  3x  M20  knockouts  for  wiring  in  purposes,  and  only  those  required 

should be used.  Any that are removed must have at least an IP66 rated gland 

fitted with cable passing through it or suitable plug.

*= meets the IP33C requirements of EN 54-3:2001+A1:2002+A2:2006.

Summary of Contents for IS-S-02

Page 1: ...INFORMATION PLEASE READ PRIOR TO INSTALLATION Website www moflash com Email technical moflash co uk Moflash Intrinsically Safe Sounder Range S00608 Issue 7 28 07 2020 AUDIBLE SIGNALLING DEVICES 1 APPR...

Page 2: ...nd of Line resistor compatible 2 0 Intrinsically Safe Labelling The product will have an individual serial number printed onto the head base plate an example of the sounder label is shown below These...

Page 3: ...t time Zone 20 Explosive dust air mixture is continuously present Zone 21 Explosive dust air mixture likely to occur in normal operation Zone 22 Explosive dust air mixture not likely to occur and if i...

Page 4: ...astic shown in Fig 1 with side cutters or a similar tool To open a locked head remove the small rubber bung from the hole on the side of the sounder insert a tool into the hole and depress the clip wh...

Page 5: ...the base by rotating anticlockwise until it comes free Remove the appropriate fixing hole and conduit knockouts from the back box The back box provides IP66 protection For this to be maintained suitab...

Page 6: ...llation of the IS S 02 Sounder head unit onto the installed base the alarm tone must be set see page 5 To control the Sounder use either a switch in the safe area on either the positive or negative li...

Page 7: ...necting the Beacon ground pin to 0v as detailed in the table on page 5 For this application a barrier with 2 Diode return paths is required as shown in the diagram below Switching between return paths...

Page 8: ...d in the entity parameters section of the installation sheet The Sounder can be turned on and off either by using a suitably placed switch in the positive or negative rails switch must be of suitable...

Page 9: ...ch can allow reverse polarity monitoring to take place and a fire panel compatible with Intrinsically Safe products must also be used If required an external switch can be wired in series with the 1 a...

Page 10: ...n sustained during its normal operation The enclosure is non conducting and may generate an ignition capable level of electrostatic charge under certain extreme conditions It is the responsibility of...

Page 11: ...e units up without the correctly rated barrier could damage these products and so void any protection ratings Specific Conditions of Use 1 Clean equipment regularly to prevent dust build up with a dam...

Page 12: ...14 400Hz O I I O I O 18 92 15 550Hz 0 7s 1000Hz 0 33s O I I I O O 1 93 16 1500Hz 2700Hz 3Hz O I I I I O 1 98 17 750Hz I O O O O O 1 93 18 2400Hz I O O O I O 1 105 19 660Hz I O O I O O 18 93 20 660Hz...

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