PXIe-6614 Product Introduction

PXIe-6614 is a 3U single-slot PXIe high-precision counter/timer module launched by NI (National Instruments, now part of Emerson). The part number is 782353-01. It is equipped with an OCXO temperature-controlled crystal oscillator and the NI-STC3 timing chip, providing 8 channels of 32-bit counters/timers + 40 channels of 5V TTL/CMOS bidirectional DIO. It is mainly designed for long-term stable precise timing measurement and pulse generation, suitable for industrial, aerospace, and mass production testing scenarios with strict time reference requirements.

Model Interpretation

PXIe: PXI Express bus, 3U single-slot specification

6614: NI X series high-precision timing/counter module code, the core is 8 channels of counters + OCXO high-precision clock + 40 channels of DIO

782353-01: Standard model, no other suffix variants Technical Specifications

Counter / Timer

Number of channels: 8 independent 32-bit counters/timers

Onboard clock: OCXO temperature-stabilized crystal oscillator, 100 MHz, annual drift ≤ 75 ppb, short-term stability 10 ppbNI

External clock: up to 80 MHz, 5V TTL/CMOS compatible

Measurement modes: event counting, period/frequency, pulse width, half-cycle,双边沿 interval， quadrature encoder position

Counting rate： no pre-divider 25 MHz， 2x pre-divider 50 MHz， 8x pre-divider 80 MHz

Resolution： 32 bits， no overflow automatic handling

DMA： independent DMA per channel， supports simultaneous high-speed transmission of multiple channels

Digital I/O

Number of channels： 40 bidirectional digital I/O

Level standard： 5V TTL/CMOS， high level ≥ 2.0 V， low level ≤ 0.8 V

Input characteristics： each channel has a software programmable digital de-impedance filter

Output drive： typical 4 mA sinking/ sourcing， maximum 8 mA

General specifications

Size： 3U single slot (21.6×2.0×13.0 cm)

Operating temperature： 0 °C ~ 55 °C

Power supply： +5 V， typical power consumption approximately 12 W

Stability： OCXO preheating for 2 hours to achieve optimal accuracy， long-term measurement error lowNI

Protection： overvoltage/overcurrent， ESD protection

Interface and communication configuration

Host bus interface

PXIe Gen1 ×1， plug-and-play， supports DMA and PXI trigger busNI

Backplane resources： PXI_CLK10， PXI_CLK100， PXI trigger bus， RTSI， used for multi-module nanosecond-level synchronizationNI

Driver： NI-DAQmx (compatible with IVI)， supports LabVIEW， C/C++， Python， TestStand

Front panel interface

1×68-pin VHDCI： includes 40 digital I/O， 8 counter input/output， PFI trigger linesNI

PFI channels： 8 dedicated counter clocks/triggers (PFI11/15/19/23/27/31/35/39)， the rest are general trigger I/O

Clock distribution： supports backplane clock， external clock (PFI39) or onboard OCXO flexible switchingNI

Core functions

8 independent precise counters/timers： 32-bit resolution， up to 80 MHz， multi-mode timing measurement

OCXO ultra-stable clock reference： 100 MHz， ppb-level stability， suitable for long-term high-precision measurementNI

40 high-speed digital I/O： 5V TTL/CMOS， bidirectional configurable， with de-impedance filtering

Quadrature encoder measurement： supports A/B/Z phases， up to 20 MHz， real-time position/velocity closed-loop

Flexible pulse generation： single pulse， pulse string， PWM， frequency/duty ratio software adjustable

Multi-module synchronization： PXI trigger bus/RTSI， builds large-scale synchronous test systemNI Applicable scenarios

Aerospace / Defense: Radar timing, satellite synchronization, high-precision frequency calibration

Industrial Automation: Servo / Stepper motor encoder feedback, precise monitoring of speed / flow

Automotive Electronics: Power system timing test, sensor signal verification, BCM timing

Semiconductor / Electronic Manufacturing: Chip timing parameter test, high-frequency pulse verification, relay lifespan test

Research and Measurement: Precise time / frequency standard, long-term stability experiment

User and Maintenance Instructions Instruction Manual

Installation: Disconnect power supply, insert 3U PXIe chassis, secure screws; VHDCI cable ≤ 1 meter, shielded twisted pair, keep away from strong electromagnetic interference.

Configuration: NI-MAX identifies hardware, NI-DAQmx configures counting mode, DIO direction, and decoupling parameters; select clock priority between onboard OCXO or external high-precision reference NI.

Preheating: Power on for 2 hours for preheating before running, ensure OCXO reaches optimal accuracy.

Synchronization: Use backplane PXI_CLK100 or the same reference clock for multi-module synchronization, calibrate trigger phase.

Operation: Prohibit hot plugging; avoid static electricity; secure connections.

Maintenance instructions

Cleaning: Regularly wipe the panel and connectors with a dry soft cloth to prevent dust and moisture.

Calibration: Calibrate once every 2 years, focus on calibrating OCXO frequency accuracy, timing error, and I/O level.

Storage: Store for long periods in an environment of −20 °C ~ 60 °C, humidity < 60%, with anti-static packaging.

Fault troubleshooting: First check connections, power supply, and drivers for abnormalities; check clock source and trigger for counting anomalies; check load short circuit for I/O anomalies; re-calibrate OCXO for precision drift.