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Relays and contactors
2019-05-30
Relays and contactors are all electromagnetic switching devices, but the former belongs to the switching device operating in the control circuit, while the latter belongs to the switching device opera...
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Basic knowledge of PLC Module : Preliminary detection of common faults of PLC hardware module
2019-07-22
Basic knowledge of PLC Module: preliminary detection of common faults of PLC hardware module PLC generally consists of CPU, memory, input/output module, communication interface and power supply and ot...
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