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KXJ1140 explosion-proof and intrinsically safe programmable control box for mining

KXJ1140 explosion-proof and intrinsically safe programmable control box for mining (hereinafter referred to as the control box) is the multi-functional general-purpose monitoring and control node (in the mining industrial network). It has the specific design of explosion-proof, seismic resistance and intrinsically safe output. It is mainly used for centralized control of the main transport belt of the mine, and can also be taken as the monitoring node for mining. The control box input is AC 1140V, the digital quantity control signal is DC intrinsically safe 18V, the analog input and output are intrinsically safe, and the voltage of digital quantity control signal can also be appropriately changed according to project requirement.

Technical parameters
Product features

1 Rated operating voltage:

Operating voltage:1140V.AC/660V.AC/127V.AC, operating current: ≤0.5A.

2 Input and output ports

3 Input port

1) 4-way analog quantity: (4 to 20) mA.

2) 40-way passive switching signal: when disconnected, the leakage resistance between two output ends shall not be less than 100kΩ. When closed, and the input current is 2mA, the output terminal voltage shall not be higher than 0.5V.

4 Output port:

1) 16-way relay output, contact capacity: 250V/5A.AC.

2) 16-way active switch signal: high level 18V, low level 0V.

5Function:

According to the field service conditions, control state of the output port by setting the input port state.

6 Display:

LCD, realizing various function setting and status indication.

7 Intrinsically safe power output parameters (see Table 1):

Serial No.	Parameter name	Value	Value
1	Rated output voltage	18V.DC	15V.DC
2	Rated output current	300mA	300mA
3	Voltage output range	(17.5-18.5) V.DC	(14.5-15.5) V.DC
Number of output ways		2-way	1-way

The control box mainly consists of the main explosion-proof chamber, human-machine operation LCD touch screen, incoming and outgoing wiring chamber and intrinsically safe chamber. The upper part includes the main chamber and wiring chamber, and the lower part is the intrinsically safe chamber. The main explosion-proof chamber adopts the bolt fastening structure, so as to facilitate equipment installation, commissioning and maintenance. The front of the master control explosion-proof box is installed with PLC module, and there is the power module box at the lower. The front door panel is installed with the operation button and extra-large LCD touch screen, and the operation interface is simple and friendly. The voice module, horn and wiring terminal are installed in the intrinsically safe chamber.