Basic Parameters

Model: PCI‑6122

Part Number: 779407‑01

Brand: National Instruments NI

Series: S-Series (Synchronous Sampling, High Resolution, Medium Speed)

Bus: PCI (3.3 V / 5 V compatible, full-length card)

Type: Multi-functional Synchronous Sampling DAQ (AI + AO + DIO + Counter)

Analog Input: 4 channels differential (synchronous sampling)

Analog Output: 2 channels 16 bits

Resolution: AI 16 bits; AO 16 bits

Sampling Rate: AI 500 kS/s per channel (synchronous)

Onboard Memory: 16 MS (sampling points)

Digital I/O: 8 channels bidirectional (5 V TTL/CMOS)

Counter: 2 channels 24 bits

Connector: 68-pin SCSI-II

Product Status: Out of Production

Features: 4 channels differential synchronous, 500 kS/s, 16-bit high resolution, 16M cache, high-speed high-precision model in S series

Analog Input (AI)

Channel Configuration: 4 channels of differential (synchronous sampling, independent ADC)

Resolution: 16 bits (65,536 levels)

Maximum Sampling Rate: 500 kS/s (synchronous per channel); no lower limit

Input Range: ±10 V, ±5 V, ±2.5 V, ±1.25 V (4 software programmable)

Input Coupling: DC (fixed)

Input Impedance: 100 MΩ || 10 pF

Overvoltage Protection: ±11 V (operating); ±36 V (transient)

CMRR (Common Mode Rejection Ratio): Typical 90 dB (DC–100 kHz)

Bandwidth: 2 MHz (–3 dB)

FIFO: 16 MS (large-capacity onboard buffer)

Absolute Accuracy: Typical 0.01% of Full Scale Range

Core Technology: Synchronous sampling without phase difference, high-resolution front end, low-noise design

Analog Output (AO)

Number of Channels: 2

Resolution: 16 bits

Output Range: ±10 V (fixed)

Update Rate: 1 MS/s (single channel); 500 kS/s (dual channel)

Drive Capability: ±5 mA

Setup Time: 10 µs (to ±0.5 LSB) slew rate 10 V/µs

Digital I/O (DIO)

Number of channels 8 bidirectional (P0.<0-7>)

Level 5 V TTL/CMOS compatible

Input high ≥ 2.0 V; low ≤ 0.8 V

Output high ≥ 2.4 V; low ≤ 0.4 V

Power-up state High resistance (50 kΩ pulled up to +5 V)

Maximum rate 10 MHz

Counter / Timer

Number of channels 2

Resolution 24 bits

Clock Internal 20 MHz / External

Functions Event counting, pulse generation, frequency measurement, encoder interface

Trigger and Synchronization

Trigger Analog trigger (AI 0-3) / External digital trigger (PFI0)

Trigger mode Edge / Gate control

Synchronization RTSI multi-card synchronization

DMA 3 channels (AI/AO/Counter)

Physical Electrical

Size Standard PCI full-length card

Interface 68-pin SCSI-II

Power supply +5 V 2.0 A

Temperature 0–50 °C

Humidity 10%–90% no condensation

Software compatibility

Driver NI-DAQmx

Development environment LabVIEW, LabWindows/CVI, C#, C++

System Windows XP/7/10/11 32/64 bit

Core features

4-channel synchronization 500 kS/s, 16-bit high precision AI

±1.25 V~±10 V programmable range, DC coupling, low noise front end

16 MS large-capacity onboard cache, 4 channels differential synchronous without phase difference

2 channels 16-bit AO (1 MS/s), 8DIO, 2 channels 24-bit counter

DMA high-speed transmission, RTSI multi-card synchronization, industrial-grade high stability

Suitable for ultrasound / sonar testing, dynamic strain measurement, mid-frequency digitization, transient recording, high-energy physics, multi-channel high-precision synchronous acquisition