指出了固态继电器(SSR)是一种以弱电控制强电的理想器件，在单片机测控系统中应用极广。

Solid state relay (SSR) is ideal equipment that using weak power to control strong power, which has extensive application in SCM measuring and controlling system.

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外围输出控制系统由发光二极管、继电器、数字开关等模拟外围设备，控制其它的弱电设备和一般的强电设备。

The periphery output control system is composed of analog peripheral device such as LED, relay, digital switch etc, to control the other weak-current devices and general heavy-current devices.

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