National Instruments 780998-01

The National Instruments part number 780998-01 corresponds to the WSN-3212 Thermocouple Input Node, designed for wireless sensor networks (WSN). This advanced thermocouple module features four dedicated input channels, equipped with a 24-bit delta-sigma Analog to Digital Converter (ADC), facilitating precise voltage and temperature measurements across a range of ±73 mV and from –270 to 950 degrees Celsius. It boasts an impressive noise rejection capability of 65 dB at 50/60 Hz, ensuring accuracy and stability in temperature readings, even in environments with high electrical interference.

The module also offers four configurable bidirectional digital I/O channels, allowing for operation in Drive High Only, Drive Low Only, Drive High and Low, or Tristate modes. In Tristate mode, the input voltage ranges from 0 to 30 V, with logical high and low thresholds defined as 1.7 to 30 V and 0 to 0.45 V, respectively. The input current specifications range from –160 µA to 400 µA maximum, while the digital output has a maximum total current output of 0.5 A across all channels, with additional voltage drop considerations based on internal resistance.

Physical specifications include a weight of 242 g (8.5 oz) without the antenna and 256 g (9 oz) when equipped with the antenna. The operational temperature range for this module spans from –40 to 70 degrees Celsius, while storage conditions require temperatures from –40 to 85 degrees Celsius with a relative humidity range of 10 to 90%, non-condensing. Built to withstand demanding environments, the WSN-3212 Thermocouple Input Node is capable of handling an operational shock of 30 g and 50 g, as well as enduring random vibrations of 5 grms at 10 to 500 Hz and sinusoidal vibrations of 5 g at the same frequency range, making it an ideal choice for critical applications in industrial automation.