Use environment:
1. This product is mainly used in underground mines, and can be widely used in coal mines, gold mines, silver mines, copper mines, iron ore, lead-zinc mines and other underground mines.
2. This product can operate normally in places with explosion hazard such as gas, coal dust, dust, etc.
3. It can operate normally in the ambient temperature range of -40℃～70℃.
4. It can be running when the relative humidity of the air is not more than 95% (at 25℃).
5. The pollution prevention grade of this product is level 3, and the installation category is Ⅲ.
6. Do not use in an environment with highly corrosive gas.

Technical index
       KJJ127 mine explosion-proof and intrinsically safe gigabit industrial ring network switch is the main equipment for establishing an Ethernet ring network underground, and it is also the center of ensuring the normal operation of the mine communication system and centralized control system. This switch can be remotely managed through the management software independently developed by Huake Electric, and realizes functions such as VLAN configuration and port flow setting.

Ethernet Gigabit Optical Signal Interface
1. Number of interfaces: can be customized according to requirements, up to 4
2. Transmission mode: full-duplex TCP/IP transmission protocol
3. Transmission rate: 1000 Mbps
4. Optical emission power: -10～0dBm
5. Optical receiving sensitivity: -20dBm
6. Maximum transmission distance: The module can be configured according to requirements, and the maximum transmission distance can reach 50KM

Ethernet 100M optical signal interface performance
1. Number of interfaces: can be customized according to requirements, up to 16;
2. Transmission mode: full-duplex TCP/IP optical signal transmission;
3. Interface type: SC
4. Transmission rate: 100Mbps

Ethernet electrical signal interface
1. Number of interfaces: can be customized according to requirements, up to 16
2. Transmission mode: full-duplex TCP/IP transmission protocol
3. Transmission rate: 10/100 Mbps adaptive
4. Peak-to-peak signal working voltage: 1V~5V

RS485 signal interface
1. Number of interfaces: can be customized according to requirements
2. Transmission mode: half-duplex RS485 signal, bipolar
3. Transmission rate: 9.6Kbps
4. Peak-to-peak signal working voltage: 2V~12V
5. Peak value of signal working current: ≤100mA