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A question regarding the wiring of programmable explosion-proof telephones

2016-08-13View Original

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In our factory, the power cords for the explosion-proof telephones are connected in parallel. The insulation of the cables is fine; when a single telephone is connected, there is no short circuit in the power cord. However, when two telephones are connected, a short circuit occurs in the power cord. We checked the mainboard of the telephones and found no signs of short circuits. May I ask how to resolve this issue?

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