Explosion-proof mine telephone without dialer TASH-12ExI

Explosion-proof mine telephone set without dialer TASH-12ExI Explosion-proof mine telephone set TASH-12ExI without dialer is designed to provide stable telephone communication in mine networks. Scope of application: underground workings of coal mines, including those hazardous due to gas and/or dust, as well as hazardous due to sudden outbursts of rock, coal and gas. It is used in mine telephone communication complexes DISK-SHATS, URI, SHTSI4, BIT78, SAT, CORAL. Telephone sets TASH-12ExI are manufactured with a degree of dust and moisture protection - IP65, according to GOST 24754-81, are intended for operation in hazardous areas and are marked PO Ex ia I Ma. The TASH-12ExI telephone set is a complete analogue of the TASH2305 mine telephone set, but has a number of additional functions and advantages. Functions of the TASH-12ExI device: telephone communication; automatic disconnection of the line and return to the “call waiting” state when the handset is off-hook after a specified period of time; receiving incoming calls when the handset is off-hook; optionally - the ability to connect an external sensor with a relay contact, when triggered, the device will transmit to the dispatcher pre-recorded voice message; ability to connect an external device to duplicate an incoming call. Technical characteristics of the device TASH-12ExI Ring signal volume at a distance of 1 m, dB no less than 95 Degree of protection from dust and moisture IP65 Class of intelligibility of voice messages in communication paths according to GOST 16600 no less than III Level and type of explosion protection PO Ex ia I Ma Maximum line length communication when using a cable with a core diameter of more than 0.64 mm, km 15 Climatic modification according to GOST 15150-69 UHL5 Local effect attenuation rate, dB not less than 8 Operating temperature range, deg. C - 30 … +60 Transmission volume indicator, dB 4...10 Relative humidity at 35 degrees C, % 100 Reception volume indicator, dB 0...minus 6 Air dust content, mg/m3, no more than 2500 Vibration loads with acceleration 49 m/s2 in the frequency range, Hz 10...70 Average time to restore working condition in electrical repair shops, hour no more than 2 Shock loads with acceleration 147 m/s2 with a total number of impacts 10000 Mean time between failures, hour no less than 10000 Dimensional dimensions, mm 305х200х90 Average service life, years not less than 6 Weight, kg 2