随着PLC价格的不断降低和用户需求的不断扩大，越来越多的中小设备开始选用PLC进行操控，PLC在我国的应用增长十分迅速。随着中国经济的高速发展和国内自动化水平的不断提高，往后一段时期内PLC在我国仍将坚持高速增长势头。
当今PLC产品主要可分为三大流派：美国、欧洲和口本。随着我国PLC的迅猛发展，国产PLC占据的分量也越来越重。据统计这些PLC产品的故障率95%以上出现在电源、继电器、通讯口这些地方。所以如何减少这些地方的故障率顾美对PLC做了这些改变：
电源外置，排除90%故障
防止空气温度变化、湿度变化的影响下，空气、尘埃、紫外线等因素对设备的破坏。容易发生故障的地方一般在电源系统和通讯网络系统，电源在持续工作、散热中，电压和电流的波动冲击是不可避免的。通讯及网络受外部干扰的可能性大，外部环境是造成通讯外部设备故障的大因素之一。目前市场上PLC基本上是电源内置，而我们的产品采用电源外置，排除90%的故障。

With the continuous reduction of PLC price and the continuous expansion of user demand, more and more small and medium-sized equipment begin to use PLC for control, and the application of PLC in China is growing rapidly. With the rapid development of China's economy and the continuous improvement of domestic automation level, PLC will continue to maintain the momentum of high-speed growth in China for a period of time.
Today's PLC products can be mainly divided into three schools: the United States, Europe and koji. With the rapid development of PLC in our country, the weight of domestic PLC is becoming heavier and heavier. According to statistics, the failure rate of these PLC products is more than 95% in power supply, relay and communication port. So how to reduce the failure rate in these places Gu Mei made these changes to PLC:
The power supply is external, and 90% of the faults are eliminated
Prevent the damage of air, dust, ultraviolet and other factors to the equipment under the influence of air temperature changes and humidity changes. The places where faults are most likely to occur are generally in the power supply system and communication network system. During the continuous operation and heat dissipation of the power supply, the fluctuation and impact of voltage and current are inevitable. Communication and network are likely to be disturbed by external interference, and the external environment is one of the biggest factors causing the failure of external communication equipment. At present, PLC in the market is basically built-in power supply, while our products use external power supply to eliminate 90% of the faults.