Overview 
 The product according to the standard GB3836-2000, MT/T899-2000 design and manufacture of relevant content. The product gas and coal dust in a coal mine explosion hazard environments, through a core optical fiber can be video signals and data signals for long distance transmission. The machine uses industrial-grade chips, all surface mount, to ensure high-quality environment in a variety of complex, long-term trouble-free operation. 
 Equipment, use of environmental conditions: 
 ? ambient temperature 0 ~ +40 ℃; 
 ? relative humidity ≤ 95% (+25 ℃); 
 ? atmospheric pressure 80 ~ 106kPa; 
 ? no significant vibration and impact areas; 
 With gas and coal dust explosion hazards in the coal mine. 
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 2 Function 
 ? the video signal is converted to optical signal output from the optical interface, through the cable from the back-end optical receiver after the receiver. 
 ? receiver back to the optical signal transmission, and converted to RS485 signal output. 
 3 Specifications 
 1 Power supply: 
 Operating voltage: AC127V; 
 Input apparent power: 30 VA. 
 2 proof mark: Exd Ⅰ 
 3 communication signal (with KBA168 Flameproof Camera integrated communications) 
 Approach: 1 Way 
 Communication: RS485 
 Baud rate: 2400 bps 
 Communication signal voltage peak - peak: 2 ~ 10V 
 Transmission Distance: 1km (with MHYVRP communications cables, cross-sectional area of ??1.5 mm 2) 
 4 video 
 1 channel video input, video signal peak: 1V (positive polarity, the whole television signal, 75Ω unbalanced load.) 
 5 Optical transmission between the ground Optical 
 Optical Interface Type: FC; 
 Wavelength: 1310nm; 
 Fiber mode: single mode; 
 Optical signal power (dBm): -10 ~ -4. 
 Maximum transmission distance: 15km (transmitter optical power:-10dBm ~-4dBm; receiver sensitivity of-25dBm; using MGTS-4B type mine single-mode optical fiber, optical fiber contacts: 18, of which 8 hot-melt contacts the cold fusion point 6 months, activities connection point 4). 
 6 dimensions and installation dimensions: as shown below;