Mining Explosion-Proof and Intrinsically Safe PLC Control Cabinet

1、Introduction

KXJ-5/127(B) Mining Explosion-Proof and Intrinsically Safe PLC Control Cabinet (hereinafter referred to as the "Control Cabinet") is primarily used for the systematic control of electromechanical equipment with multiple motor drives in underground coal mines where methane and coal dust explosion hazards exist. It is designed for the fully automatic control of hoist or endless rope winch drive systems and belt protection systems.

2、Main Technical Parameters

 2.1 Power Supply

Rated operating voltage: AC 127V;

Input apparent power: ≤200 VA.

2.2 Power Output

• 1 channel of DC 24V intrinsically safe power output;
• 1 channel of DC 18V intrinsically safe power output;
• 1 channel of DC 12V intrinsically safe power output.

2.3 Weight：≤120kg

2.4 Size: 734 x338x 590 (mm)

3. Transmission Performance

3.1 Signal Input  

• Digital (Dry Contact) Signals: 22 channels, On-state resistance ≤10.5 kΩ, Off-state resistance >100 kΩ.
• Analog Voltage Signals (0~5V): 1 channel.
• Analog Current Signals (4~20mA): 8 channels.

3.2 Signal Output

• Digital (Dry Contact) Signals: 16 channels, On-state resistance ≤10.5 kΩ, Off-state resistance >100 kΩ.
• Analog Current Signals (4~20mA): 2 channels.

3.3 RS485 Interface

• Number of Interfaces: 1 channel.
• Transmission Mode: RS485.
• Transmission Rate: 9600 bps.
• Transmission Distance: 50 m (using MYQ cable with a single-core cross-sectional area of 1.0 mm²).

3.4 Ethernet Electrical Interface

• Number of Interfaces: 6 channels.
• Transmission Mode: TCP/IP Ethernet.
• Transmission Rate: 10/100/1000 Mbps (Auto-adaptive).
• Maximum Transmission Distance: 10 m.

3.5 Ethernet Optical Interface Transmission

• Number of Interfaces: 2 Gigabit SFP ports.
• Transmission Mode: TCP/IP Ethernet.
• Transmission Rate: 10/100/1000 Mbps Auto-adaptive.
• Optical Transmit Power: (-10~10) dBm (1310nm, Single-mode fiber).
• Optical Receive Sensitivity: -20 dBm (1310nm, Single-mode fiber).
• Maximum Transmission Distance: 10 km (using MGXTSV optical cable with an attenuation coefficient of 0.5 dB/km).

4. Basic Functions

4.1 It features intrinsically safe power supply output, 485 signal transmission, and Ethernet signal transmission capabilities.

4.2 It has the function of collecting both digital and analog signals.

4.3 It possesses programmable control functionality.

4.4 It includes call and signaling (audio communication and tone signaling) functionality.

5. Intrinsically Safe Parameters

5.1 One 12V output power supply: Uo: 12.1V, Io: 1.3A, Co: 22µF, Lo: 0.1mH;

5.2 One 18V output power supply: Uo: 18.5V, Io: 1.0A, Co: 2.2µF, Lo: 0.1mH;

5.3 One 24V output power supply: Uo: 24.5V, Io: 0.5A, Co: 1.0µF, Lo: 0.1mH;

5.4 One RS485 output: Uo: 6.6V, Io: 11.2mA, Co: 15µF, Lo: 45mH.