KJJ127 mine explosion-proof and intrinsically safe network switch, with flameproof and intrinsically safe design, is suitable for underground coal mines where there is a danger of gas and coal dust explosions. The switch supports IEEE802.3 store-and-forward switching mode, provides 100/1000Mbps fast Ethernet capability, and is a necessary communication product for building a comprehensive Ethernet network in coal mines. This product can be remotely managed through the network, realize ring network configuration and VLAN configuration and other functions, and has 2-4 hours of backup power. Aliases: mine switch, mine explosion-proof and intrinsically safe network switch, coal mine underground ring network switch.

Power supply：

    a) Rated working voltage：AC127V

    b) Input apparent power：≤50VA

Backup power：

   The backup battery pack is a C-type 4.5Ah, 14.4V NiMH battery pack, consisting of 12 C-type NiMH rechargeable single cells with a nominal capacity of 4.5Ah and 1.2V in series。

    a) Conversion time：≤300ms

    b) working hours：2h

Port parameters：

1、Gigabit optical signal interface performance：   

    ①  Transmission mode: full-duplex TCP/IP optical signal transmission；

    ②  Interface type：LC

    ③  Transmission rate：1000Mbps

2、Fast Ethernet optical port:

    ① Transmission mode: full-duplex TCP/IP optical signal transmission；

    ② Interface type：SC

    ③ Transmission rate：100Mbps

3、Ethernet interface (intrinsically safe):

    ① Transmission mode: full-duplex TCP/IP optical signal transmission；

    ② Transmission rate：100Mbps

4、RS485 interface performance (intrinsically safe)

    ① Transmission mode: half duplex, RS485

    ② Transmission rate：9600bps