Home> Industry Information> What are the requirements for the cash register external power supply?

What are the requirements for the cash register external power supply?

September 11, 2019

Any electronic product requires the output of the Power Supply to be used, such as mobile phones, iPads, and laptops. These have battery storage power, and even if the Power Supplies suddenly fails, it will not affect the use. The cash register is different. You need to input the power from the external power supply before you can use it. If there is no external power supply, the cash register will not work. Therefore, the power of the cash register is an essential factor that enables the cash register to work properly. So what are the specific requirements for the external power supply of the cash register?

First, as a cash register product, the power adaptor must have good grounding performance and the grounding resistance is less than 1 Ω. If the power supply is not grounded or the grounding is poor, it may cause the chassis to be charged, which may pose a safety hazard to the operator and affect the stable operation of the cash register. Furthermore, the grid voltage is 220V/50HZ AC, and the allowable fluctuation range of the grid voltage is ±10% of the rated value. Before the equipment is powered on, please check whether the power supply meets the voltage requirements of this product. Only when confirming that the external power supply is normal, You can power on the device. However, in order to avoid sudden interruption of power supply, fluctuations in grid voltage, and transient spikes, a suitable uninterruptible power supply (UPS) should be selected as needed. However, the protection ground of the UPS power supply should be connected.

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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