NI 9215

Technical Specifications

4‑channel differential analog input; Simultaneous sampling; Sampling rate: 100kS/s per channel; Input range: ±10V; Resolution: 16‑bit; Input impedance >1GΩ; Bus type: C‑Series.

Functional Features

Independent ADC per channel for simultaneous sampling with zero inter‑channel phase offset; Differential input suppresses common‑mode interference; Hardware trigger support; Hot‑swappable module; Real‑time data logging and analysis with NI platform.

Application Scenarios

Rotating‑machinery vibration testing, power‑system signal acquisition, industrial laboratory data acquisition, mechanical‑equipment condition monitoring, prototype measurement‑and‑control system construction.

Performance Parameters

Near‑zero inter‑channel phase error; Total harmonic distortion: ‑90dB; No galvanic isolation; Operating temperature: ‑40℃ ~ +70℃; Bandwidth: 45kHz.

Material Composition

Flame‑retardant engineering‑plastic housing; Industrial‑grade FR‑4 PCB substrate; Metallic shielding layer; On‑board precision ADC chips.

Structural Characteristics

Standard C‑Series modular form factor; Spring‑loaded terminal connector; Direct plug‑in into cDAQ / cRIO chassis slots with compact footprint.

Working Principle

External differential voltage feeds independent analog‑to‑digital converters on each channel. Analog voltage is synchronously converted into digital data and transmitted via chassis internal bus to controller for computation and storage.

Installation Requirements

Install inside compliant NI cDAQ or cRIO chassis; Ensure chassis ventilation and heat dissipation; Use shielded twisted‑pair wires for wiring; Fasten terminals to eliminate loose connections; Ground chassis housing.

Precautions for Use

Never apply input voltage exceeding ±10V full‑scale range; Prevent static electricity from touching module PCB; Maintain adequate ventilation during module operation; Do not plug / unplug external wiring under powered condition.