描述
CPU主要由运算器、控制器、寄存器及实现它们之间联系的数据、控制及状态总线构成，CPU单元还包括外围芯片、总线接口及有关电路。内存主要用于存储程序及数据，是PLC不可缺少的组成单元。
National Instruments 3′ I/O Cable
National Instruments NI PCI-6519 16-In/16-Out Isolated
National Instruments DAQCARD-6024E
National Instruments GPIB-ENET/100 Ethernet to GPIB ni
NATIONAL INSTRUMENTS TBX-68 TERMINAL BLOCK
National Instruments NI VXI-MXI-2 Mainframe Extender
National Instruments 14-bit Multifunction I/O USB-6009
National Instruments NI PCI-6220 PCI Card
National Instruments Digital I/O Board PCI-DIO-32HS
National Instruments PCI-5102 Digitizer Scope DAQ Card
NATIONAL INSTRUMENTS GPIB-USB-HS CONTROLLER
