Channel & Wiring Configuration

• 8 differential signal input channels, matched for SCXI high-speed analog modules
• Independent dual DIP switches per channel for AC/DC coupling switching
• Configurable floating/ground-referenced input via internal bias resistors
• 22 gold-plated screw terminals for secure stranded/solid wire connection

Coupling & Filter Parameters

• DC Coupling: Direct signal transmission, 200 kHz full signal bandwidth
• AC Coupling: Single-pole high-pass filter, -3dB cutoff at 0.7 Hz
• Internal bias resistor: 100 kΩ for floating sensor grounding
• Input parasitic capacitance: 22 pF per differential channel

Key Electrical Specifications

• Maximum continuous input voltage: ±60 VDC/Vrms channel-to-chassis
• Transient overvoltage withstand: 1000 V peak surge
• Input impedance: 1 MΩ parallel with 22 pF
• Channel crosstalk: <-90 dB at 1 kHz
• Insulation resistance: >1 GΩ between channels and shielding shell
• Power consumption: Passive device, no external power required

Mechanical & Environmental Specifications

• Mounting: Direct front mounting for standard 96-pin SCXI modules
• Shell: EMI-shielded aluminum alloy anti-interference housing
• Dimension: 172×42×32 mm, half-height SCXI front accessory
• Operating temperature: -20℃ ~ +70℃, humidity: 10%–90% non-condensing

Software Compatibility

• Drivers: No dedicated driver, compatible with NI-DAQmx and Traditional NI-DAQ
• Supported software: LabVIEW, LabWindows/CVI, Python DAQmx, C#
• Compatible host: SCXI-1600, PCI/PXI DAQ acquisition cards

Pros & Limitations

• Pros: Passive no-power design, independent channel coupling control, built-in bias grounding, integrated shielding, excellent low-frequency DC interference suppression
• Limitations: Only compatible with SCXI-1140 series modules, no built-in signal amplification, not applicable for thermocouple low-level DC signals