NI‑9381

8 AI / 8 AO / 4 DIO, 0–5 V, 12‑Bit, C Series Multifunction I/O Module

• 782580‑01 (standard, no conformal coat)

• 782580‑02 (conformal coated)NI

Overview

Key Specifications

Analog Inputs (AI)

• Channels: 8 single‑ended

• Resolution: 12‑bit

• Voltage Range: 0 V to 5 V

• Aggregate Sampling Rate: 20 kS/s total (shared across AI/AO)

• Input Impedance: > 100 kΩ

• Accuracy (calibrated, −40 °C to 70 °C): ±1.02% max, ±0.19% typical (23 °C)NI

• No isolation (channel‑to‑earth or channel‑to‑channel)

Analog Outputs (AO)

• Channels: 8 single‑ended

• Resolution: 12‑bit

• Voltage Range: 0 V to 5 V

• Update Rate: 20 kS/s total (shared with AI)

• Slew Rate: 1 V/µs

• Settling Time: 10 µs (to ±0.1%)

• Short‑circuit protection

Digital I/O (DIO)

• Channels: 4 LVTTL, single‑ended

• Default Power‑on Direction: InputNI

• Logic Levels:

  • VIH ≥ 2 V, VIL ≤ 0.8 V

  • VOH ≥ 2.7 V (sourcing 100 µA)

• Max Switching Frequency: 1 MHz

• Input Voltage Range: −0.5 V to 5.2 VNI

General

• Connector: D‑SUB (DB‑37)

• Operating Temperature: −40 °C to +70 °C

• Driver Support: NI‑DAQmx, LabVIEW, Python, C/C++

• Isolation: None (non‑isolated module)

Main Features

• Highly integrated: 8 AI + 8 AO + 4 DIO in one C‑Series slot

• Cost‑efficient: Reduces system cost vs. using separate AI/AO/DIO modules

• Multiplexed timing: Shared 20 kS/s engine for mixed analog I/ONI

• CompactRIO‑optimized: Designed for real‑time control and FPGA‑based systemsNI

• Conformal coat option: Available for harsh industrial environmentsNI

Applications

• General‑purpose industrial control & monitoring

• Small‑scale test systems (sensor + actuator control)

• Custom automation with mixed analog/digital I/O

• Educational labs (CompactRIO training)

• Low‑channel‑count data acquisition + control

Compatibility Note

• Only works with CompactRIO chassis (e.g., cRIO‑904x, cRIO‑905x, cRIO‑906x)

• Not compatible with CompactDAQ or USB carriersNI