The signalling bell dGW21 was designed to warn, call and signal in group II explosive atmospheres and rough environmental conditions in hazardous areas. The signalling bell produces a sound volume of approx. 105dB(A) at 1 meter distance.
The frequency of the sound of the bell is approx 1kHz, meaning the signal can be clearly heard against lower frequency background noise. The bell can also be activated with the presence of a telephone ringing signal in the dRGW 21 version.
The protection of this product is a mixture of Exd “flameproof” for the driver system and Exe “increased safety” for the termination chamber. The dRGW 21 offers initiation by a relay from a telephone ringing voltage.
The flameproof chamber contains the electromagnetic driver system and the enclosure is made from GRP (glass-fibre reinforced polyester), guaranteeing protection against corrosion. As the dGW 21 is safety class II, so there is no equipotential bonding necessary
4 ATEX II 2 G Ex de IIC T6
Housing made of glass-fibre reinforced polyester (GRP)
Volume: approx: 105 dB(A)
Protection: IP 66
Safety class II (no equipotential bonding necessary)
Version dRGW 21 with integrated telephone call relay
Integrated terminal box realized in Ex protection mode increased safety
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Explosion Protection: |
II 2 G Ex de IIC T6. |
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Protection |
IP 66. |
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Safety class: |
II (no equipotential bonding necessary). |
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Housing |
GRP glass-fibre reinforced polyester. |
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Colour: |
Black or red. |
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Cable gland: |
1x M20 x 1.5 cable gland and 1 blind plug M20 x 1.5. |
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Connection terminals: |
1.5 mm2 fine wire. 2.5 mm2 single wire. |
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Operating conditions: |
Indoors and outdoors |
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Operating position: |
Bell dome to the front (tappet downwards). |
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Volume: |
Approx. 105 dB(A) at 1m distance. |
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Operating mode: |
Continuous. |
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Temperature range: |
Operation: -20ºC to +40ºC Storage: -30ºC to +80ºC. |
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Weight: |
Approx. 5.5 kg |
