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Home | Products | DW Ex[d] Explosion proof call station

DW Ex[d] Explosion proof call station

DWEx Explosion Proof Call Station is a subscriber equipment to use at industrial and transportation enterprises within the digital Intercom and Public Address / General Alarm system Armtel DCN.
DWEx is designed for use in potentially explosive gas environment, except for mines and their ground structures that are mine gas hazardous according to explosion proof marking:

•1Ex d e ib IIC T6 Gb Х (IEC 60079-0-2011)
•II 2 G Ex d e ib IIC T6 Gb (EN 60079-0:2012)

With markings for explosive dust environments:

•II 2 D Ex tb IIIC T85 °C IP66 Db
•Ex tb IIIC T85 °C Db

Explosion proof is achieved by insulation of electrical circuits from interaction with dangerous environment by placing them in explosion proof box and providing electrical connections through “ib” spark-safe circuits.

Parameter
Value
Supply voltage range, V
from -36 V to -60 V
Maximum operating current with main amplifier
95 mА
Maximum operating current With auxiliary amplifier 25 W
1,1 A
Bandwidth
from 300 Hz tо 6800 Hz
Line interface
Uk0
Number of programmable direct connections / functions
from 1 to 24
Transfer protocol
Armtel
Auxiliary amplifier
25 W
Max. sound pressure level of built-in speaker (at 1 m.)
104 dB
Ambient temperature range
from -40˚C to +70˚C
Air humidity
Up to 100 % at +25˚С
Protection class as per GOST 14254-2015
IP66
Electrical safety class according to GOST 12.2.007.0-75, IEC 61140-2012
III
Dimensions without handset
515×130×205 mm
Dimensions with handset
540×130×225 mm
Maximum weight
8,9 kg

DWEx is designed for use in potentially explosive gas environment, except for mines and their ground structures that are mine gas hazardous according to explosion proof marking:

  • 1Ex d e ib IIC T6 Gb Х (ТР ТС 012/2011)
  • II 2 G Ex db eb ib IIC T6 Gb (ATEX 2014/34/EU),

With markings for explosive dust environments:

  • II 2 D Ex tb IIIC T85 °C IP66 Db
  • II 2 D Ex tb IIIC T85 °C IP66 Db (ATEX 2014/34/EU)

Explosion proof is achieved by insulation of electrical circuits from interaction with dangerous environment by placing them in explosion proof box and providing electrical connections through “ib” spark-safe circuits.

  • Two-way loud-speaking simplex communication with the help of integrated speaker and microphone;
  • Loud-speaking voice communication in “half-duplex” mode with duplex devices like telephone sets;
  • Group calls and Public Address, including zonal one;
  • Extended voice signal bandwidth up to 6,8 kHz;
  • Broadcasting of alarm signals and other pre-recorded messages from central exchange for single subscribers and group of subscribers;
  • Indication of calls, busy subscriber, unanswered call and other modes on LED indicators of programmable keys;
  • Translation of incoming sound messages via integrated loudspeaker and optional 25 W amplifier;
  • Control of external signal device via built-in relay;
  • Reliable communication via digital twowire Uk0-interface line to a distance of up to 6 km;

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