NI SCXI-1313 High-Voltage Attenuator Terminal Block

The NI SCXI-1313 is a shielded terminal block that interfaces high-voltage signals with SCXI systems, specifically designed for use with the SCXI-1125 module. Each of its eight channels incorporates a precision 100:1 resistive voltage divider to safely condition and attenuate high-voltage inputs before acquisition. The dividers are individually bypassable for low-voltage measurement applications, providing flexible signal conditioning across a range of test scenarios.

– Technical Specifications

Voltage Attenuation
• Eight channels with 100:1 resistive voltage divider
• Attenuation ratio: 100:1 (bypassable to 1:1)
• Maximum input voltage: up to 300 V RMS or ±300 V DC
• SCXI-1313A variant limited to 150 V RMS or ±150 V DC

Temperature Monitoring
• Integrated thermistor sensor
• Output range: 1.91 to 0.65 V
• Operating range: 0 to 50 °C
• Conversion support via LabVIEW (Convert Thermistor Reading VI) and CVI/NI-DAQ (Thermistor_Convert function)

Connectivity
• 18 screw terminals total: one pair for chassis ground, eight pairs for SCXI-1125 analog inputs
• Maximum wire gauge: 16 AWG
• Recommended wire: 26–14 AWG, 300 V minimum rating, 60 °C temperature rating
• Terminal spacing: 0.5 cm center-to-center
• Front entrance: 1.2 by 7.3 cm

Physical
• Dimensions: 7.000 x 3.125 x 1.200 inches (17.78 x 7.94 x 3.05 cm)
• Weight: 7 oz (198 g)
• Safety earth-ground lug and strain-relief bar included

Environmental
• Storage temperature: –20 to 70 °C
• Relative humidity: 10 to 90% non-condensing

– Key Features

• Precision 100:1 voltage dividers on all eight channels
• Individual bypass capability for mixed-range measurements
• Shielded enclosure for noise immunity
• Screw-terminal interface with strain relief
• Integrated temperature monitoring with software conversion utilities

– Compatibility & Integration

The SCXI-1313 is purpose-built for the NI SCXI-1125 module and operates within UL-listed SCXI chassis systems. It integrates with NI-DAQmx driver software for seamless data acquisition and signal processing workflows.