Applications asynchronous generator can only be applied to many small-scale automation. City trams, electrolysis, electrochemistry and other industries with a DC power supply, before the 1950s, use of a DC generator. But DC generator commutator, complex structure, manufacturing and time-consuming, expensive and prone to failure DSE710 manufacturers, maintenance difficulties, the efficiency is not as alternators. Therefore, since the advent of high-power controlled rectifier, use of AC power by the semiconductor rectifier to replace the DC-DC generator obtained trend. Controller Access control: access control to work under two modes. One is the inspection mode, the other is to identify patterns. In polling mode, the controller continuously sends query code reader manufacturers DSE710, and received the reply command the reader. This model will remain down until the reader senses the cards. When the reader senses the card, the card reader to the patrol command produces a different response in the reply command, the reader will read the card within the code data to the access control, make access control The controller into identification mode. In recognition access control mode DSE710, access control analyze Card ID, the same equipment stored card data for comparison, and the implementation of the follow-up action. After completion of action Access Controller to receive data, it sends a command reply card reader, so that the reader restore the state, while access control back to patrol mode. Manufacturers DSE710, Zhongxin Electrical and Mechanical Services (certified), DSE710 provided by the Dongguan City, South City Zhongxin Electrical and Mechanical operation. Dongguan Nancheng Zhongxin Electrical and operating (zhongxin888.net.cn) Dongguan, Guangdong, industrial products leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhongxin Electrical and Mechanical leadership with the staff warmly welcome all inquiries negotiations to create a better future for electromechanical faithful.