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KXY660(A) explosion-proof and intrinsic-safety voice box

KXY660(A) explosion-proof and intrinsic-safety voice box  (the voice box) is the central composing part of the mine broadcast system, and provides communication channels for speech communication in the mines. It is applicable for dangerous environments with possibility of gas and coal dust explosion, and is also applicable for ground severe environments for industries such as coal, metallurgy, chemical industry, building materials, transportation, power and food.


Power supply:
Input voltage: AC 127V/220V/380V/660V;
Power: ≤42W
Standby power supply:
a) Charging voltage: 13.6V;
b) Charging current: ≤300mA;
c) Working time: ≥2h(full load); 
Ethernet optical signal interface:
a) Number of interfaces: 3
b) Transmission rate: 10/100Mbps self adaptive;
c) Maximum transmission distance: 20km
Ethernet electric signal interface:
a) Number of interfaces: ;
b) Transmission mode: full duplex, UDP protocol;
c) Transmission rate: 10/100Mbps self adaptive;
d) Maximum transmission distance: 100m.
RS485 transmission:
a) RS485 interface: 1;
b) RS485Transmission distance: less than 500m.
Audio analog output interface:
Signal value: Maximum Vpp = 2V
Amplifying performance: within 3m, no less than 90dB (A)

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