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September 11, 2019
Since most of the cash register products use ATX power supply, the main power supply is not completely turned off when the power is turned off. If you want to disconnect the power supply, you should disconnect the socket switch or unplug the power plug, especially in thunderstorms. Causes lightning strikes on equipment. The neutral line and the live line of the power supply socket must not be connected incorrectly. The protection ground line of the cash register must not be directly connected to the zero line of the power grid in the equipment room. The ground line must be connected to the absolute ground of the building.
In order to avoid interference from other electrical equipment to the cash register, the cash register must be separately led out from the power distribution room and cannot share the same line with other high-power equipment, such as: power tools, refrigerators, freezers, electric heaters, air conditioners, etc. Power consumers share one power supply. At the same time, in order to reduce the interference of the power supply on the data signal, the power cable and the data cable (display, network cable, printer data cable, serial communication cable) should be kept at a distance of more than 100 MM at the time of installation, and the power cable and the data cable are never allowed to be wrapped. Together.
Finally, when the cash register is turned on, you should first turn on the external device power switch, and then turn on the host power. When shutting down, you should first turn off the power of the host and then turn off the power of the external device.
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