The NI 9225 is a 3-channel, 24-bit C Series voltage input module engineered for high-voltage measurement across power metering, power quality monitoring, motor testing, battery stack testing, and fuel cell testing. It acquires differential analog signals simultaneously at up to 50 kS/s per channel with 600 Vrms channel-to-channel isolation, enabling transient and harmonic analysis while mitigating ground loops and enhancing system safety.
Technical Specifications
• 3 differential analog input channels
• 300 Vrms measurement range
• 24-bit resolution
• Up to 50 kS/s sampling rate per channel with simultaneous acquisition
• 600 Vrms channel-to-channel isolation
• Configurable data rates from 50 kS/s down to 1.613 kS/s using internal master timebase (12.8 MHz / 256 / n, where n = 1 to 31); external timebases support alternative rates
• Combined analog and digital filtering optimized for passband accuracy and out-of-band rejection
• Active mode power consumption: 495 mW maximum
• Sleep mode power consumption: 25 µW maximum
• Operating temperature: -40 °C to 70 °C
• Storage temperature: -40 °C to 85 °C
– Key Features
• Three 2-terminal detachable screw-terminal or snap-in connectors for signal connectivity
• Lightweight form factor: 141 g (5.0 oz) with screw terminal connector
• Qualified for Class I, Div 2, Gr A, B, C, D, T4 and Class I, Zn 2, Gr IIC, T4 hazardous locations with IP 54 enclosure
• Marine-grade deployment supported with shielded cables, metal enclosure, and ferrite suppression on power supplies
– Typical Applications
• Power metering and power quality monitoring
• Motor and battery stack characterization
• Fuel cell testing and analysis
• Transient capture and harmonic analysis
– Compatibility & Integration
The NI 9225 integrates with NI C Series platforms including CompactDAQ and CompactRIO chassis. Three part numbers are available: 780159-01 (non-conformal coated), 780159-02 (conformal coated), and 789126-01.
