ATEX Sounders Zone 1 & Zone 2 Signalling Bell Ex de – Eaton MEDC dGW 21 Hazardous Area Sounder

Eaton MEDC dGW 21 are ATEX sounders (signalling bell) that were 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 of the hazardous area sounder 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 MEDC 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.

All D.C. versions are also equipped with an electronic contact breaker, increasing product service life.

Eaton MEDC dGW 21

ATEX Sounders Zone 1 & Zone 2

ATEX

Features

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

Eaton MEDC dGW 20 – Dimensions

MEDC Dgw 20 Hazardous Area sounders

Technical Specification

Explosion Protection	II 2 G Ex de IIC T6
Protection	IP 66
Safety class	II (no equipotential bonding necessary)
Housing	GRP glass-fibre reinforced polyester
Colour	Black or red
Cable gland	1x M20 x 1.5 cable gland and 1 blind plug M20 x 1.5
Connection terminals	1.5sqmm fine wire. 2.5sqmm single wire
Operating conditions	Indoors and outdoors
Operating position	Bell dome to the front (tappet downwards)
Volume	Approx. 105 dB(A) at 1m distance
Operating mode	Continuous.
Temperature range	Operation: -20ºC to +40ºC Storage: -30ºC to +80ºC
Weight	Approx. 5.5 kg

EATON MEDC dgw 20 – ORDERING REQUIREMENTS

Product Type	Product Description	Voltage Ue	Operating Voltage Range Ue	Current Consumption	Eaton MEDC Part Number
Housing Black
dGW 21	Ex-Signalling Bell	12 VDC	+10/-15%	0.60 A	MEDC F910 122 10*
dGW 21	Ex-Signalling Bell	24 VDC	+10/-15%	0.35 A	MEDC F910 242 10*
dGW 21	Ex-Signalling Bell	110 VAC	+10/-15%	0.14 A	MEDC F911 101 10*
dGW 21	Ex-Signalling Bell	110 VDC	+10/-15%	0.13 A	MEDC F911 102 10*
dGW 21	Ex-Signalling Bell	230 VAC	+10/-15%	0.06 A	MEDC F912 301 10*
dGW 21	Ex-Signalling Bell	240 VAC 60 Hz	+10/-15%	0.07 A	MEDC F912 401 1060*
dGW 21	Ex-Signalling Bell with telephone relay	230 VAC	+10/-15%	0.06 A	MEDC F912 301 1000*
Housing Red
dGW 21	Ex-Signalling Bell	12 VDC	+10/-15%	0.60 A	MEDC F910 122 1013*
dGW 21	Ex-Signalling Bell	24 VDC	+10/-15%	0.35 A	MEDC F910 242 1013*
dGW 21	Ex-Signalling Bell	110 VAC	+10/-15%	0.14 A	MEDC F911 101 1013*
dGW 21	Ex-Signalling Bell	110 VDC	+10/-15%	0.13 A	MEDC F911 102 1013*
dGW 21	Ex-Signalling Bell	230 VAC	+10/-15%	0.06 A	MEDC F912 301 1013*

*All part numbers are ATEX variants

ATEX Sounders

Eaton MEDC

Eaton MEDC have developed ATEX products designed for harsh and hazardous area conditions and where there is a risk of explosion due to the presence of flammable atmospheres both onshore and offshore – since 1975 MEDC have been designers and manufacturers of alarm, signal, control and communications equipment. T&D distribute the extensive range of Eaton MEDC ATEX Certified manual call points, visual, audible alarms, loudspeakers and telephones for hazardous area workplaces, including Zone 1 & Zone 2 explosive atmospheres.

Thorne & Derrick, are the Explosive Atmosphere Experts, distributing an extensive range of ATEX Certified Equipment including heat tracing cables and systems, electrical heating products, electrical enclosures and plug/sockets outlets.

Complete range of LV-HV Cable Joints, Terminations, Cleats & Glands are available to support installation of power, control and instrumentation cables up to 33kV – includes Cold Shrink for use in hazardous areas to provide electrical insulation and cable protection.

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