Low-current line selection device and control method for inhibiting unbalanced current by way of differential filtration
A wire selection device, a technology of balancing current, applied in electrical program control, program control in sequence/logic controller, fault location and other directions, to achieve the effect of improving wire selection accuracy, high sampling frequency and large amount of data
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[0054] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0055] like figure 1 As shown, a small current line selection device for differential filtering to suppress unbalanced current according to the present invention is composed of a multi-channel AC sampling signal input interface 1, an operational amplifier filter module 2, an analog / digital conversion module 3, and a central processing unit module 4. Composed of a power supply module 5, a man-machine module 6 and a communication module 7. , wherein the multi-channel AC sampling signal input interface 1, the operational amplifier filter module 2, and the analog / digital conversion module 3 are sequentially connected, and the analog / digital conversion module 3, the man-machine module 6, and the communication module 7 are bidirectionally connected with the central processing unit module 4 respectively , the power supply module 5 i...
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