|Vacuum Equipment
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What is the control method of ZK2 series vacuum unit ejectors with an energy-saving function?
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For the NPN type, when the contact between blue (DC minus) and gray (FUNC) is turned ON, the output that opens the supply valve from OUT2 is output via the main circuit of the vacuum pressure switch, and vacuum suction begins. When the vacuum rises to the specified output, OUT2 is automatically turned OFF. The supply valve closes and the vacuum is held in this condition. However, when the vacuum drops to the set pressure due to a decrease in the vacuum, OUT2 is output again and the supply valve is opened. The suction operation continues until the contact between blue and gray is turned OFF. For release, turn OFF the contact between blue and gray, and turn ON the contact between white (input for release valve) and blue (DC minus). Inside the ZK2 series vacuum unit, there is a double check valve for vacuum retention. Vacuum release is not possible unless the release valve is opened.
