±10 V, 200 kS/s/ch, 20-Bit, Simultaneous Input, 4-Channel C Series Voltage Input Module—The NI‑9355 performs simultaneous differential analog input with 250 Vrms CAT II or 60 VDC CAT I isolation. The module can perform high-precision measurements, and it features 20-bit resolution. The NI‑9355 has two connector options: snap-in and D-SUB.