The NI PXIe-4300 simultaneously measures eight differential high-voltage analog inputs up to ±300 V. This module features 300 Vrms channel-to-channel CAT II isolation and 3,300 Vrms channel-to-earth five-second withstand to protect users and equipment from hazardous voltages. Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system. This category refers to local-level electrical distribution, such as that provided by a standard wall outlet, for example, 115 V for the United States or 230 V for Europe.
With a 16-bit ADC per channel and a 250 kS/s per channel sampling rate, the NI PXIe-4300 module can stream 4 MB/s per module and 68 MB/s in a single chassis. Because the NI PXIe-4300 uses PXI Express technology, you can simultaneously acquire channels from dozens of modules at maximum sample rate without reaching communication bus limitations. To remove high-frequency noise, the NI PXIe-4300 also includes programmable lowpass filters (10 kHz, 100 kHz, bypass) per channel.
You can choose the NI TB-4300 terminal block for ±10 V signal inputs or NI TB-4300B terminal block for ±300 V signal inputs. The TB-4300 is strictly a feedthrough terminal block. The TB-4300B provides 30:1 attenuation to the input signal with additional high-voltage protection circuitry. Scaling constants are stored in the EEPROM and used by software to automatically apply scaling to the signal band of the selected range. The TB-4300 and TB-4300B are front mounting terminal blocks with screw terminal connectivity.