描述
要有必需的后备手段:重要的保护和联锁,出了有通讯连接外,还必须具有硬接线方式;对重要的调节设备,除了在操作员站上有软手操外,还必须有后备手操,以便在DCS控制系统控制器或I/O模件发生故障时,仍然可以对重要设备进行及时干预。
National Instruments 181065-01 GPIB-PCII/IIA ISA GPIB
VHDCI Brkout for National Instruments PCI-6220 M Series
NATIONAL INSTRUMENTS SC-2050
National Instruments 9932 10 Position Connector Block
NATIONAL INSTRUMENTS PCI-6503 DAQ I/O CARD PCI-DIO-24
National Instruments Data Acquisition Card CF-6004 DAQ