NI PCIe-6612 High-speed digital input/output module

The NI PCIe-6612 is a PCIe bus card of the X series from National Instruments (NI), featuring 8-channel 32-bit counter/timer + 40 high-speed digital I/O for industrial control, motion and pulse measurement, encoder interface, high-speed DIO, and 5 V TTL/CMOS level NI.

I. Basic Information
Model: PCIe-6612 (Part Number 782351-01) NI
Bus: PCI Express (x1)
Functionality: Counter / Timer + High-Speed Digital Input Output (DIO)
Core Chip: NI-STC3 Timing / Synchronization Chip
Driver: NI-DAQmx (Supports LabVIEW, CVI, C#/Python)
Price (2026): Approximately $1,612 NI
Core Hardware Specifications
1) Counter / Timer (8 independent channels)
Channel Count: 8 × 32-bit Counter
Maximum Input Frequency: 80 MHz (External Source) NI
Internal Timebase: 100 MHz Function:
Event counting, period/frequency measurement, pulse width measurement
Encoder (A/B/Z) position/velocity measurement
Pulse/pulse sequence generation (PWM, trigger pulse) NI

2) Digital I/O (40 bidirectional)
Channels: 40 (P0.0~P0.31, P1.0~P1.7), can be used as PFI (programmable function interface)
Level: 5 V TTL/CMOS
Input: -3 V ~ +8 V protection
Output: 75 Ω impedance, 6 mA drive
Direction: Each channel can be independently set as input/output/PFI
Pull-up/pull-down: 51 kΩ pulled to GND
High-speed DIO:
Sampling clock: up to 10 MHz
DO FIFO: 2,047 samples; DI FIFO: 255 samples
3) DMA and performance
3 independent DMA channels, can transmit data at high speed simultaneously, does not occupy CPU
Operating temperature: 0 ~ 55°C (industrial grade)
Power consumption: approximately 6 W (+3.3 V / +12 V)