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|Voltage||-36 to -60 V|
|Bandwidth||300 to 6800 Hz|
|Main Amplifier Power||0,85 W|
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)
Explosion proof in is achieved due to the insulation of its electrical circuits from interaction with potentially dangerous gas environment, by placing them in flame proof casing – explosion proof box, as well as providin the electrical connections of speaker, microphone and pushbutton switches through “ib” spark-safe circuits.
Two-way loud-speaking simplex communication with the help of integrated speaker and microphone or ex-ternal microphone with a push-to-talk key;
• 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 subscribersand group of subscribers;• Indication of calls, busy subscriber, unanswered call and other modes on LED indicators of programmablekeys;• Translation of incoming sound messages via integrated loudspeaker and optional 25 W amplifier;• Control of external signal device with the help of built-in relay;• Reliable communication via digital two-wire Uk0 –interface line to a distance of up to 6 km;• Integration with DCP, MDK systems produced by «Neumann Elektronik».