What should I pay attention to the grounding method of the control cable shield?

I. Control cable shield grounding method should pay attention to which 1, the computer pro-control system of analog signal loop control cable shield, it is appropriate to use a centralized one-point grounding. The reason is based on the requirements to ensure the normal operation of the computer monitoring system, because even if only 1V or so of the interference voltage, may also cause the fallacy of logical judgment, centralized grounding can be avoided ground loop; 2, in addition to the computer monitoring system of the control cable shielding layer only allowed to focus on one point of the case of grounding, the other control cable shielding, when the electromagnetic induction of interference is greater, it is appropriate to use two-point grounding, and the electrostatic induction of interference is greater, the use of one-point grounding. When the interference of electrostatic induction is large, a point of grounding; 3, double shielding or composite total shielding of the inner shielding layer is appropriate to use a point of grounding, while the outer shielding layer can be two points of grounding; 4, the choice of two points of grounding should also be considered in the transient current, the shielding layer will not be burned.

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