NI 9411 / cRIO-9411 6-Channel C-Series Digital Input Module

The NI 9411 / cRIO-9411 is a 6-channel C-Series digital input module for National Instruments CompactRIO and CompactDAQ systems. It acquires high-speed digital signals with a maximum update rate of 500 ns, supporting both differential and single-ended configurations across industrial logic levels. The module accepts ±5 V to 24 V signals including 5V TTL, 12V, 24V, and RS-422 standards, with built-in channel isolation of 60 VDC CAT I and per-channel I/O protection. A 15-pin D-SUB connector accommodates 30 AWG to 14 AWG wire (0.05 mm to 1.5 mm), with screw terminal torque of 0.5 to 0.6 N·m.

– Technical Specifications

• Channels: 6 digital input channels
• Input Configuration: Differential or single-ended
• Single-Ended Logic Levels: Input high 2 to 24 V; Input low 0 to 0.8 V
• Differential Logic Levels (DIa–DIb): Input high 300 mV to 24 V; Input low –300 mV to –24 V
• Supported Standards: 5V TTL, 12V, 24V, RS-422
• Common-Mode Voltage: –7 to 12 V
• Input Current: ±4 mA (internally limited)
• Maximum Update Rate: 500 ns
• Channel Isolation: 60 VDC, CAT I channel-to-earth
• Connector: 15-pin D-SUB
• Wire Gauge: 30 AWG to 14 AWG (0.05 mm to 1.5 mm)
• Operating Temperature: –40 °C to 70 °C
• Storage Temperature: –40 °C to 85 °C
• Operating Humidity: 10% to 90% RH (non-condensing)
• Vibration Tolerance: 5 grms, 10 to 500 Hz (random)
• Shock Tolerance: 50 g (11 ms half-sine); 5 g (sinusoidal)
• Weight: 4.8 oz
• Measurement Category: Category I

– Key Features

• Per-channel I/O protection and input current limiting
• Hazardous location rated: Class I Division 2 (Groups A, B, C, D, T4); Class I Zone 2 AEx nC IIC T4; Ex nC IIC T4
• Channels share common ground isolated from other system modules

– Compatibility & Integration

Works with NI CompactDAQ and CompactRIO platforms. Programmable via LabVIEW (Professional, FPGA, Real-Time modules), NI-DAQmx, NI-RIO, LabWindows/CVI, SignalExpress, Visual Studio, and Visual Studio .NET. Compatible accessories include the NI 9935 D-SUB Connector and NI 9948 Strain Relief.