National Instruments NI 9401 Bedienungsanleitung

NI-9401 Getting

Started

2022-07-06

Contents

Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Connecting the NI-9401. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

NI-9401 Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connecting a Serial Peripheral Interface Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connecting Digital Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Overcurrent/Short-Circuit Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

NI Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

ni.com

NI-9401 Getting Started

Before You Begin

Read the NI-9401 Safety, Environmental, and Regulatory Information and

complete the soware and hardware installation procedures in your chassis

documentation.

Safety Guidelines

Caution Observe all instructions and cautions in the user documentation.

Using the product in a manner not specified can damage the product and

compromise the built-in safety protection.

Attention Suivez toutes les instructions et respectez toutes les mises

en garde de la documentation d'utilisation. L'utilisation du produit de

toute autre façon que celle spécifiée risque de l'endommager et de

compromettre la protection de sécurité intégrée.

Safety Voltages

Connect only voltages that are within the following limits:

Maximum voltage[1]

Channel-to-COM ±30 V maximum on one channel at a time, Measurement Category I

Isolation voltages

Channel-to-channel None

Channel-to-earth ground

Continuous 60 V DC, Measurement Category I

Withstand 1,000 V RMS, verified by a 5 s dielectric withstand test

NI-9401 Getting Started

1 The maximum voltage that can be applied or output between any channel and

COM without damaging the module or other devices.

Safety Guidelines for Hazardous Locations

The NI-9401 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous

locations; Class I, Zone 2, AEx nA IIC T4 Gc and Ex nA IIC T4 Gc hazardous locations;

and nonhazardous locations only. Follow these guidelines if you are installing the

NI-9401 in a potentially explosive environment. Not following these guidelines may

result in serious injury or death.

Caution Do not disconnect I/O-side wires or connectors unless power has

been switched o or the area is known to be nonhazardous.

Caution Do not remove modules unless power has been switched o or

the area is known to be nonhazardous.

Caution Substitution of components may impair suitability for Class I,

Division 2, or Zone 2.

Caution The system must be installed in an enclosure certified for the

intended hazardous (classified) location, having a tool secured cover/door,

where a minimum protection of at least IP54 is provided.

Caution For Division 2 and Zone 2 applications, connected signals must

be within the following limits.

Capacitance 0.2 µF maximum

Special Conditions for Hazardous Locations Use in Europe and

Internationally

The NI 9401 has been evaluated as Ex nA IIC T4 Gc equipment under

DEMKO 03ATEX 0324020X and is IECEx UL 14.0089X certified. Each NI 9401 is marked

ni.com

NI-9401 Getting Started

II 3G and is suitable for use in Zone 2 hazardous locations, in ambient

temperatures of -40 °C ≤ Ta ≤ 70 °C . If you are using the NI 9401 in Gas Group IIC

hazardous locations, you must use the device in an NI chassis that has been

evaluated as Ex nC IIC T4, Ex IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

Caution Transient protection shall be provided that is set at a level not

exceeding 140% of the peak rated voltage value of 85 V at the supply

terminals to the equipment.

Caution The system shall only be used in an area of not more than

Pollution Degree 2, as defined in IEC/EN 60664-1.

Caution The system shall be mounted in an ATEX/IECEx-certified

enclosure with a minimum ingress protection rating of at least IP54 as

defined in IEC/EN 60079-15.

Caution The enclosure must have a door or cover accessible only by the

use of a tool.

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory requirements and limits

for electromagnetic compatibility (EMC) stated in the product specifications. These

requirements and limits provide reasonable protection against harmful interference

when the product is operated in the intended operational electromagnetic

environment.

This product is intended for use in industrial locations. However, harmful

interference may occur in some installations, when the product is connected to a

peripheral device or test object, or if the product is used in residential or

commercial areas. To minimize interference with radio and television reception and

prevent unacceptable performance degradation, install and use this product in strict

accordance with the instructions in the product documentation.

NI-9401 Getting Started

Furthermore, any changes or modifications to the product not expressly approved

by National Instruments could void your authority to operate it under your local

regulatory rules.

Cable Requirements for EMC Compliance

Select and install cables for the NI-9401 in accordance with the following

requirements:

■Install a clamp-on ferrite bead (782803-01) on the cable that you are

connecting to NI-9401.

■The clamp-on ferrite bead must be connected to the cable as close to the

module as possible. Placing the ferrite elsewhere on the cable noticeably

impairs its eectiveness.

Figure 1. Installing a Ferrite Bead

1 2

1. Installing a ferrite bead on a 25-pin DSUB cable.

2. Installing a ferrite bead on the cable of the terminal block.

Special Conditions for Marine Applications

Some products are approved for marine (shipboard) applications. To verify marine

approval certification for a product, visit ni.com/product-certifications, search by

model number, and click the appropriate link.

Notice In order to meet the EMC requirements for marine applications,

install the product in a shielded enclosure with shielded and/or filtered

power and input/output ports. In addition, take precautions when

designing, selecting, and installing measurement probes and cables to

ensure that the desired EMC performance is attained.

ni.com

NI-9401 Getting Started

Preparing the Environment

Ensure that the environment in which you are using the NI 9401 meets the following

specifications.

Operating temperature (IEC 60068-2-1, IEC 60068-2-2) -40 °C to 70 °C

Operating humidity (IEC 60068-2-78) 10% RH to 90% RH, noncondensing

Pollution Degree 2

Maximum altitude 2,000 m

Indoor use only.

Note Refer to the device datasheet on ni.com/manuals for complete

specifications.

Connecting the NI-9401

The NI-9401 provides connections for 8 digital input/output channels.

Figure 2. NI-9401 Pinout

COM

DIO0

DIO1

DIO2

DIO3

DIO4

DIO5

DIO6

DIO7

NI-9401 Signals

Signal Description

COM Common reference connection to isolated ground

DIO Digital input/output signal connection

NI-9401 Getting Started

Signal Description

NC No connection

Table 1. Signal Descriptions

Ports

The DIO channels are grouped in two ports, one containing channels 0, 1, 2, and 3,

and one containing channels 4, 5, 6, and 7. You can independently configure each

digital port in soware for input or output. Note that all four channels in the port

must share the same line direction.

Connecting a Serial Peripheral Interface Device

You can connect a Serial Peripheral Interface (SPI) device to the NI-9401.

Figure 3. Connecting an SPI Device to the NI-9401

Connecting Digital Devices

You can connect several types of digital devices to the NI-9401.

Figure 4. Connecting Digital Devices to the NI-9401

Overcurrent/Short-Circuit Protection

The overcurrent protection allows only a specified amount of current through the

output channels to protect the NI-9401 from short circuits. If the NI-9401 goes into

an overcurrent state, the module sets all the DIO channels to high impedance for

approximately 280 ms.

ni.com

NI-9401 Getting Started

When the channels are in an overcurrent state, the NI-9401 can accept new line

direction configuration and output state data but cannot pass valid input data to the

soware.

Where to Go Next

NI Services

Visit ni.com/support to find support resources including documentation,

downloads, and troubleshooting and application development self-help such as

tutorials and examples.

Visit ni.com/services to learn about NI service oerings such as calibration options,

repair, and replacement.

Visit ni.com/register to register your NI product. Product registration facilitates

technical support and ensures that you receive important information updates from

NI.

NI corporate headquarters is located at 11500 N Mopac Expwy, Austin, TX,

78759-3504, USA.

NI-9401 Getting Started

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