The MEDC dGW21 Signalling Bell is designed to warn, call and signal in group II explosive atmospheres and rough environmental conditions in hazardous areas. This Bell produces a sound volume of approx. 105dB(A) at 1 meter distance.
The frequency of the sound of this MEDC Signalling Bell is approx. 1kHz, meaning the signal can be clearly heard against lower frequency background noise. The MEDC dGW21 can also be activated with the presence of a telephone ringing signal in the dRGW21 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 dRGW21 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, guaranteeing protection against corrosion. As the MEDC dGW21 Bell is safety class II, so there is no equipotential bonding necessary.
All DC versions are also equipped with an electronic contact breaker.
Features
Volume: approx. 105 dB
Housing made of glass-fiber reinforced polyester (GRP)
Integrated terminal box realized in Ex protection mode increased safety
Version dRGW21 with integrated telephone call relay.
