Channel & Wiring Configuration

• 4-channel fully differential independent galvanic isolation input
• Two working modes: multiplexed mode (occupy 1 DAQ AI channel) / parallel mode (high-speed synchronous sampling)
• Per-channel independent excitation, amplification and filtering circuits with no shared components
• Rear 96-pin shielded DIN connector for front terminal block wiring

Programmable Gain & Input Range

• Software-selectable gain multiples: ×1, ×2, ×5, ×10, ×20, ×50, ×100, ×200, ×500, ×1000
• Voltage input range: ±10 V max, ±10 mV minimum measurable input
• Current input range: 0–22 mA (standard 4–20 mA loop support)
• Sensor excitation: Isolated 2.5 mA/10 mA constant current output for RTD and strain bridges

Filter & Scanning Parameters

• Switchable on-board filters: 10 kHz & 4 Hz 4th-order low-pass filters
• Max multiplexed scan rate: 100 kS/s aggregate
• Max parallel synchronous scan rate: 25 kS/s per independent channel
• 4 Hz filter dedicated for 50/60 Hz industrial mains noise elimination

Key Electrical Specifications

• Input impedance: >1 GΩ for voltage input
• 60Hz CMRR: >120 dB; Transient isolation withstand: 1000 V surge
• Absolute measurement accuracy: ±0.05% FSR at 25°C ambient temperature
• Overvoltage protection: ±60 VDC channel-to-chassis continuous protection
• Backplane power consumption: 3.6 W typical operating power
• Built-in per-channel CJC sensor for thermocouple cold junction compensation

Mechanical & Environmental Specifications

• Dimension: 172×86×32 mm, standard single-slot SCXI module
• Operating temperature: -40℃ ~ +85℃
• Storage temperature: -55℃ ~ +100℃
• Humidity: 10%–90% non-condensing

Compatibility Matching List

• Matched terminal block: SCXI-1321 shielded universal terminal block
• Compatible chassis: SCXI-1000, SCXI-1001
• Compatible controllers: SCXI-1600, PCI/PXI SCXI bus adapters
• Official status: Obsolete, supplied for aftermarket spare replacement

Software Compatibility

• Drivers: NI-DAQmx, Traditional NI-DAQ
• Configuration tools: NI Measurement & Automation Explorer (MAX)
• Supported software: LabVIEW, LabWindows/CVI, Python DAQmx, C#

Pros & Limitations

• Pros: Per-channel full galvanic isolation, universal multi-sensor compatibility, dual sampling modes, built-in isolated excitation and CJC, ultra-wide temperature adaptability
• Limitations: Only 4 channels with low density, higher power consumption, no built-in AC/DC signal coupling function