145290 / 8491602300
2020-04-21·BA00·III·en·04
Function and device design
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Signal Horn 105 dB(A)
Series 8491/2
4
Function and device design
4.1
Function
Application range
The device was developed as a signalling device for providing a warning in hazardous
areas in which inflammable dust or gas is present. Device group II, category 2 is
approved for use in almost all dust and gas hazardous areas where persons are present.
Gas explosion protection is achieved using an "mb" encapsulation and through "eb"
increased safety in the area of the electrical connection. Dust explosion protection is
provided by the enclosure with the "tb IIIC T70 °C Db" type of protection. Suitable for use
in areas with combustible dusts with a minimum ignition energy of > 1 mJ.
The device is not intended for continuos use.
DANGER
Explosion hazard due to improper use!
Non-compliance results in severe or fatal injuries.
• Use the device only in accordance with the operating conditions
described in these operating instructions.
• Use the device only for the intended purpose specified in these
operating instructions.
