利用数字电位器ds1867实现了对激光器电源内部电阻的控制，从而改变激光器发射功率等级的目的。
This laser power can control adjustable resistance internal to change the level of transmitting power using the digital resistance DS1867.
提高了频率采集的精度等级，增加了信号及电源防雷击和抗电磁干扰功能模块。
The accuracy grade of frequency collection is improved, the function modular to prevent lightning and electromagnetic disturbance of signal and power source is added.
选择时主要根据PLC输出设备的电源类型和电压等级的多少而定。
Choice primarily on the basis of PLC power output device type and the number of voltage levels may be.
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