Description
微控制器STC89C51RC、开关量输入电路、继电器输出电路、晶体管输出电路、RS232通信接口电路、电源电路、时钟复位电路和USB通信接口电路等，PLC硬件系统框图如图2所示，软件采用Borland公司集成开发软件C++ Builder
SMC VS4220 Soleniod valve NEW
Schneider ASHDTA200 sub rack NEW
Ingersoll Rand pressure transmitter 1X12829 NEW
United Electric Controls Differential pressure switch
