我低电压电路控制位于 Control located in low-voltage circuit
对于PLC控制器，低电压控制电路和三相电源要有必要的了解。
Understanding of PLC controllers, low voltage control circuits and three-phase power necessary.
系统选w 78le516单片机和CPLD来构造控制电路，用读写速度快、功耗低的低电压外部数据存储器CF卡存储采集完的信号。
The system select W78LE516 MCU and CPLD to construct the control circuit and use quickly read and write low power consumption, low-voltage external data memory CF card to save the signal.
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