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The broadcast terminal is a broadcast terminal based on industrial Ethernet. It is installed in the dispatch room above the well. It exchanges data with the broadcast software installed on the PC through the provided network interface. It uses the optical cable wired network as the backbone and connects to several broadcast substations set up underground through industrial Ethernet to conduct two-way communication with the broadcast substations underground.

1.1 Conditions of use

The broadcast host is a device used in the machine room and dispatch room. It should be able to work normally under the following conditions:

a) Ambient temperature: 15℃～30℃;

b) Relative humidity: 40%～70%;

c) Temperature change rate: less than 10℃/h, and no condensation;

d) Atmospheric pressure: 80 kPa～106 kPa;

e) Dust, lighting, noise, electromagnetic field interference and grounding conditions specified in GB/T 2887.

1.2 Power supply

The ground center station equipment can work normally under the following power supply conditions.

Rated voltage: 220V AC;

Allowable deviation: -10% to 10%;

Harmonic: no more than 5%;

Frequency: 50Hz, allowable deviation ±5%.