描述
存储器内存容量的估算没有固定的公式，许多文献资料中给出了不同公式，大体上都是按数字量I/O点数的10～15倍，加上模拟I/O点数的100倍，以此数为内存的总字数（16位为一个字），另外再按此数的25%考虑余量。该选择包括运算功能、控制功能、通信功能、编程功能、诊断功能和处理速度等特性的选择。
National Instruments NI GPIB-120A Bus Expander/Isolator
NATIONAL INSTRUMENTS NI GPIB-VXI/C 184511B-01
NATIONAL INSTRUMENT NI-CFP-RLY-421 USPP NICFPRLY421
National Instruments PCI-GPIB IEEE 488.2 183617K-01
National Instruments NB-AO-6 D/A Converter Board, NuBus
National Instruments Dual Channel 4-20mA Analog Output
National Instruments SCXI-1304 AC/DC Terminal Block
National Instruments PCI-MIO-16E-4 PCI-6040E
National Instruments SC-2075; Breadboarding; E-Series
**NEW** National Instruments PCI-6512 Iso 64-Ch Outputs
National Instruments DAQCard-DIO-24 24-bit Digital I/O
NATIONAL INSTRUMENTS NI 182419B-05 CABLE SH6868 SH-6868
National Instruments SCB-100; Shielded Connector Block
National Instruments MXI2/2 8-meter cable 182802A-008
