The NI FP-AI-112 FieldPoint 16-Channel Analog Voltage Input Module acquires high-accuracy voltage measurements across 16 independent input channels. This delta-sigma ADC module delivers 16-bit resolution and supports eight configurable input ranges from ±60 mV to ±10 V, accommodating both unipolar and bipolar signals. Overranging capability extends measurement limits to ±10.4 V, compensating for field device span errors up to 4% of full scale and preventing clipping errors. Configurable 50/60 Hz noise rejection filters provide 95 dB rejection at the fundamental frequency and ≥60 dB at harmonics; a 500 Hz filter option enables faster update rates. The module mounts directly on FieldPoint terminal bases or Compact FieldPoint backplanes, drawing approximately 350 mW from the host system.
Technical Specifications
• Channels: 16 analog voltage inputs
• Resolution: 16-bit
• Input Ranges: 0–1 V, 0–5 V, 0–10 V, ±60 mV, ±300 mV, ±1 V, ±5 V, ±10 V (per-channel configurable)
• Overranging: Extends to ±10.4 V on ±10 V range
• ADC Type: Delta-sigma
• Input Impedance: >100 MΩ (power on)
• Overvoltage Protection: ±40 V
• Isolation: 250 Vrms CAT II channel-to-ground (2,300 Vrms dielectric withstand, 1 minute)
• Noise Rejection: 95 dB @ 50/60 Hz fundamental; ≥60 dB at harmonics; 500 Hz filter available
• Power Consumption: ~350 mW
• Update Rate: ~0.27–0.32 s (3.7 Hz typical, varies by filter settings)
– Key Features
• Software-configurable input ranges and filtering
• Overranging support compensates for field device span errors
• Hot-swappable module design
• Onboard diagnostics for maintainability
• High input impedance minimizes sensor loading
– Compatibility & Integration
Designed for National Instruments FieldPoint and Compact FieldPoint distributed I/O systems. Mounts on FieldPoint terminal bases (FP-TB-x) or Compact FieldPoint backplanes (cFP-BP-x).
