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Audible signalling device | Sounder | In flameproof enclosure | Increased safety | Type : 8491/21-230 | Enclosure material : PC/ABS | Enclosure colour : Black | Sound pressure level : max. 105 dB(A) @ 1m | Back-up fuse : 8560/51-4073 | Nominal fuse rating : 125 mA | AC rated operational voltage : 230,00 V | Rated operational current : 0,07 A | Power : 0 W | Frequency range : 50 Hz | Application range (zones) : 1 , 2 , 21 , 22 | Gas explosion protection : II 2 G Ex eb mb IIC T5 Gb | Dust explosion protection : II 2 D Ex tb IIIC T70 °C Db | min. ambient temperature : -40 °C | max. ambient temperature : +50 °C | IP degree of prot. (IEC 60529): IP65 | Cable glands and entries : 1 x M16 Ø 6.5 to 9.5 mm | Dimensions (L x W x H) : 104 x 178 x 207 mm | For further information, see : r-stahl.com WebCode 8491A