PCI‑6220 | Product Introduction

The NI PCI‑6220 is a low-cost multi-functional DAQ card in the M series of National Instruments (NI), a PCI bus, full-length card. It features 16 analog inputs (16 bit/250 kS/s) + 24 DIO + 2 counters, without analog outputs. It is suitable for laboratory automation, research and development verification, small-scale production testing, general sensor acquisition, etc., in cost-sensitive, medium-low speed scenarios. Part number: 779347‑01; discontinued (EOL), replacement model: PCIe‑6320NI.

I. Basic Information

Model: PCI‑6220

Brand: National Instruments (NI)

Series: M-Series (low-cost, multi-functional)

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

Connector: 68-pin VHDCI

Driver: NI‑DAQmx

Operating Temperature: 0 ~ 55 °C

Dimensions: 9.7 × 15.5 cm

II. Analog Input AI (16 channels)

Channels: 16 single-ended / 8 differential (software configurable)

Resolution: 16 bits, no bit loss guarantee

Maximum Sampling Rate: 250 kS/s (single channel / total of multiple channels)

Input Range (software selectable): ±0.2 V, ±1 V, ±5 V, ±10 V

Coupling: DC

Input Impedance: >10 GΩ || 100 pF (power-on)

Maximum Working Voltage: ±11 V (signal + common mode)

CMRR: 92 dB @ DC~60 Hz

Input FIFO: 4,095 samples NI

Scan List: 4,095 items NI

III. Digital I/O (DIO)

Channels: 24 bidirectional TTL (PFI 0~23)

Level: 5 V TTL/CMOS

Maximum Rate: 10 MHz

Function: bidirectional input/output, event triggering, handshake signal

IV. Counter / Timer

Channels: 2 32-bit general-purpose counters

Clock: 20 MHz internal base

Function: event counting, frequency / period measurement, pulse output, encoder, PWM

V. Trigger and Synchronization

Trigger: AI analog trigger, PFI external digital trigger

Synchronization: RTSI multi-card synchronization

Data Transmission: DMA, interrupt, programmable I/ONI

VI. Installation and Usage Tips (Core of the Manual) Installation

Turn off the power, insert into the standard PCI slot, and secure the cover screws.

After powering on, the device will be identified and self-tested in MAX (Measurement & Automation Explorer).

Wiring (68-pin VHDCI)

AI: Single-ended connect AIn + GND; differential connect AI+ / AI−, with common-mode voltage not exceeding ±11 V.

DIO: TTL level, common ground, avoid long-distance and stray lines.

Software configuration (NI-DAQmx)

Sampling mode: Asynchronous scan (asynchronous).

Range: Select ±0.2 / ±1 / ±5 / ±10 V according to signal amplitude.

Trigger: Commonly used edge trigger (rising / falling). Notes for Attention

The analog input must not exceed ±11 V; otherwise, it will damage the front end.

There is no isolation, and it is not suitable for strong interference/high voltage environments. It requires a SCC/SCXI signal conditioning NI.

VII. Core Features

16 channels of 16-bit AI, 250 kS/s, 24 DIO, 2 counters, complete functions NI

Low cost, PCI bus, plug-and-play, stable NI-DAQmx driver NI

Channels can be configured as single-ended/differential, suitable for most sensors and low-voltage signals

Applications: Laboratory acquisition, research and development verification, production testing, small-scale data recording NI