A remote power-off device and system
A power-off device, remote technology, applied in electrical program control, program control in sequence/logic controllers, etc., can solve the problems of not widely used, power consumption, low safety, etc. The effect of improving safety
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Embodiment 1
[0026] An embodiment of the present invention provides a remote power-off device, see figure 1 , the device includes a controller 1, a relay 2, and a power-on delay relay 3.
[0027] Wherein, the controller 1 is used to receive a power-off command from the control device 4, the power terminal of the controller 4 is connected to the power terminal of the electric device 5, and the control device 4 is arranged in the activity area of personnel. The control terminal of the relay 2 is connected to the output terminal of the controller 4 , the movable contact of the relay 2 is connected to the power supply terminal of the electrical equipment 5 , and the normally open contact of the relay 2 is connected to the power supply 6 . The control end of the energization delay relay 3 is connected with the power supply 6 , the movable contact of the energization delay relay 3 is connected with the power supply end of the electrical equipment 5 , and the normally closed contact of the ener...
Embodiment 2
[0048] An embodiment of the present invention provides a remote power-off system, see Figure 4 , the system includes a control device 21 and a remote power-off device 22, the remote power-off device 22 is the remote power-off device described in Embodiment 1, and the control device 21 and the remote power-off device 22 are wired or wirelessly connected.
[0049] Optionally, the control device 21 may be a computer.
[0050] The embodiment of the present invention replaces the control circuit board and the relay in the prior art with the relay, the power-on delay relay, and the controller to complete the power-off of the electrical equipment, and the device does not need to keep the power-on state, which saves electric energy and improves safety. Moreover, controlling the power-off of the electrical equipment through the on-off of the relay does not need to limit the electrical equipment to the electrical equipment driven by direct current as in the prior art, and is more wide...
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