Introduction was made to the composition and working principle of a power-off time delay relay which adopts CMOS digital circuit, digital dial disc for switch setting and without auxiliary power.

介绍了一种采用CMOS数字电路、数字拨盘开关整定、无辅助电源的断电延时继电器的组成及工作原理。

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Take OMRON CPM1A as an example, the changing setting value methods in which we use analog input potentiometer, dial switch and push-switch are introduced.

以OMRON CPM1A为例，介绍了用模拟输入电位器、拨码开关和按钮等方法改变定时器的设定值。

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