NI 9421 Screw Term, 24 V, 100 µs, 8-Ch Sinking DI Module (779002-01)

24 V, 8-Channel (Sinking Input), 100 µs C Series Digital Module
The NI‑9421 works with industrial logic levels and signals to connect directly to a wide array of industrial switches, transducers, and devices. Each channel is compatible with 24 V logic levels and has an LED indicating the state of that channel. The NI‑9421 offers isolation between the input channels and earth ground.

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Key product
Input Characteristics

  • Number of channels = 8 digital input channels
  • Input type= Sinking

Digital logic levels
OFF state

  • Input voltage=≤5 V
  • Input current= ≤300 μA

ON state

  • Input voltage=11 V to 30 V
  • Input current=≥3 mA

I/O protection

  • Input voltage=40 V maximum
  • Reverse-biased voltage=-30 V maximum
  • Input current=7 mA maximum, internally limited
  • Input delay time=100 μs maximum

Environmental Characteristics
Temperature

  • Operating=-40 °C to 70 °C
  • Storage=-40 °C to 85 °C

 

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