NI SCXI-1327
Part No.: SCXI-1327 (777687-27)
Manufacturer: National Instruments (NI)
Type: High-Voltage Attenuator Terminal Block
For Use With: SCXI-1120/D, SCXI-1121, SCXI-1125, SCXI-1126
Channels: 8-channel, 100:1 Attenuation (Switchable)
Max Input: 300 Vrms / ±300 VDC
Connection: 18 Screw Terminals, Shielded Enclosure
1. General Description
The NI SCXI-1327 is a shielded, high-voltage attenuator terminal block designed for the NI SCXI signal conditioning system. It features a precision 100:1 resistive voltage divider per channel, enabling safe measurement of high-voltage signals up to 300 Vrms or ±300 VDC. Each channel’s attenuation can be independently switched on or off, making it ideal for mixed high/low voltage applications. It also includes an integrated temperature sensor for thermocouple cold-junction compensation (CJC).
2. Key Specifications
• Attenuation Ratio: Precision 100:1 (per-channel switchable)
• Maximum Input Voltage: 300 Vrms AC, ±300 VDC
• Input Impedance: 1 MΩ (when installed)
• Connectors: 18 screw terminals (signal + ground)
• CJC Sensor: On-board temperature sensor
• Shielding: Full metal EMI/RFI shield
• Dimensions: 7.0 x 3.125 x 1.2 in.
• Operating Temp.: 0°C to +50°C
3. Core Features
• Independent channel attenuation bypass switches
• Direct high-voltage signal measurement (no external dividers needed)
• Integrated cold-junction compensation for thermocouples
• Full metal shielding for noise reduction in industrial environments
• Front-mount design, compatible with SCXI rack systems
• Supports hot-swapping for system maintenance
4. Typical Applications
• Industrial power supply monitoring & test
• High-voltage sensor data acquisition
• Electrical equipment & power electronics test
• Mixed high/low voltage signal measurement systems
• Precision temperature measurement with thermocouples (CJC)
National Instruments © SCXI High-Voltage Terminal Block
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