![NI-9421, 24 V, 8-Channel (Sinking Input), 100 µs C Series Digital Module](https://d27wgn5g4t3wja.cloudfront.net/products/c74274b9-ee12-4086-9e5e-55c9ece6f963/384308.png)
NI-9421, 24 V, 8-Channel (Sinking Input), 100 µs C Series Digital Module
NI-9421 / 779002-01 - NI (National Instruments)
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.