滤波，这是抗干扰的另一个主要措施。在PLC的电源电路和输入/输出电路中设置了多种滤波电路，用以对高频干扰信号进行有效抑制。对PLC的内部电源还采取了屏蔽、稳压、保护等措施，以减少外界干扰，保证供电质量。另外使输入／输出接口电路的电源彼此独立，以避免电源之间的干扰。
National Instruments PCI-MIO-16XE-50 Card
National Instruments PSHR68-68M 183569-01 NEW
National Instruments AT-DIO-32F card
National Instruments PXI-8211
NATIONAL INSTRUMENTS NI PCI-6251 Data Acquisition
National Instruments TBX-68T I/O Connector Block New!
NATIONAL INSTRUMENTS NI TB-2725 w / BNC Cable
National Instruments PXI-6602, 8 32-Bit Up/Dn Counters
National Instruments NI AT-MIO-16D Analog to Digital Ti
National Instruments NI PXI-8156 PXI DAQ
National Instruments PCI-6512 Iso 64-Ch Outputs
NATIONAL INSTRUMENTS NI PXI-7831R I/O MODULE
NATIONAL INSTRUMENTS IMAQ DIGITAL TEST FIXTURE CARD
