描述
就地总线或现场总线-般由双绞线组成的数据通信网络,由于其连接的设备是与生产过程直接发生联系的一次元件或控制设备,所以工作环境恶劣,故障率高,容易受到检修人员的误动而影响生产过程。另外,总线本身也会因种种原因造成通信故障
National Instruments NI Double-shielded SHC68-C68-D2
National Instruments NI PCI-6503 (PCI-DIO-24) DAQ Card
National Instruments: PXI-1000B 8-slot 3U PXI Chassis
National Instruments PXI 1000B chassis MXI-3 controller
NATIONAL INSTRUMENTS CB-50LP UNSHIELDED I/O CONNECTOR
NATIONAL INSTRUMENTS SCXI-1000 WITH 4 SCXI-1100
New National Instruments CB-50LP Unshielded I/O Connect