DWEx[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:

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

With markings for explosive dust environments:

• II 2 D Ex tb IIIC T85°C Db IP66 (EN 60079-0:2012)
• Ex tb ib IIIC T85°C Db (IEC 60079-0-2011)

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.

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Parameter

Value

Rated voltage

48 V

Supply voltage range

from 36 to 60 V

Quiescent current under rated voltage, maximum

25 mA

Number of programmable direct connections/ functions

from 2 to 24

Maximum operating current without auxiliary amplifier

95 mА

Maximum operating current with auxiliary amplifier 25 W

1,1 A

Maximum constant power (external (signal) device circuit)

60 W

Maximum switching DC voltage (external (signal) device circuit)

60 V

Maximum switching current DC (external (signal) device circuit )

2,0 A

Maximum power of main amplifier

1,0 W

Maximum power of auxiliary 25 W amplifier (for version with auxiliary amplifier 25 W)

25 W

Bandwidth

from 300 tо 6800 Hz

Sound pressure level of built-in loudspeaker at the maximum volume

95 dB

Line interface

Uk0-interface according to CCITT

Communication protocol

«Armtel»

Explosion-proof marking as per EN 60079-0:2012

«II 2 G Ex db eb ib IIC T6 Gb»;
«II 2 D Ex tb IIIC T85°C Db IP66»

Explosion-proof marking as per IEC 60079-0-2011

«1Ex d e ib IIC T6 Gb»;
«Ex tb IIIC T85°C Db»

Electric protection class as per ГОСТ 12.2.007.0-75, IEC 61140

Protection degree provided by shells (under GOST 14254-2015 (IEC 60529:2013)) (IP-code)

IP66

Climatic category according GOST 15150-69

NF1

Ambient temperature range

from -40 to +70 ºC

Air pressure range

from 84 to 106,7 kPa

Relative humidity, at the temperature of 25 ºC

up to 100 %

Dimensions without handset

515×130×205 mm

Dimensions with handset

540×130×225 mm

Maximum weight

9,1 kg

DWEx Flameproof Field Call Station is a subscriber equipment to use at industrial and transportation enterprises within the digital Intercom and PA/GA system Armtel DCN.
DWEx intercom call station 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:
• II 2 G Ex d e ib IIC T6 Gb (EN 60079-0:2012)
• 1Ex d e ib IIC T6 Gb (IEC 60079-0-2011)

With markings for explosive dust environments:
• II 2 D Ex tb IIIC T85°C Db IP66 (EN 60079-0:2012)
• Ex tb ib IIIC T85°C Db (IEC 60079-0-2011)

Flameproof is achieved by insulation of electrical circuits from interaction with dangerous environment by placing them in flameproof 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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