National Instruments NI 9401 Bedienungsanleitung

NI-9401

2023-04-25

Contents

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

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

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

Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Connecting the NI 9401. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

NI 9401 Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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

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

Connecting Digital Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Overcurrent/Short-Circuit Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

Worldwide Support and Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ni.com

NI-9401

Overview

This document explains how to connect to the NI 9401.

Note Before you begin, complete the soware and hardware installation

procedures in your chassis documentation.

Note The guidelines in this document are specific to the NI 9401. The

other components in the system might not meet the same safety ratings.

Refer to the documentation for each component in the system to

determine the safety and EMC ratings for the entire system.

<National Instruments>\_Legal Information directory for information about NI

compliance.

Safety Guidelines

Operate the NI 9401 only as described in this document.

Caution Do not operate the NI 9401 in a manner not specified in this

document. Product misuse can result in a hazard. You can compromise the

safety protection built into the product if the product is damaged in any

way. If the product is damaged, return it to NI for repair.

NI-9401

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 VDC, Measurement Category I

Withstand 1,000 Vrms, verified by a 5 s dielectric withstand

test

Measurement Category I is for measurements performed on circuits not directly

connected to the electrical distribution system referred to as MAINS voltage. MAINS

is a hazardous live electrical supply system that powers equipment. This category is

for measurements of voltages from specially protected secondary circuits. Such

voltage measurements include signal levels, special equipment, limited-energy

parts of equipment, circuits powered by regulated low-voltage sources, and

electronics.

Caution Do not connect the NI 9401 to signals or use for measurements

within Measurement Categories II, III, or IV.

Note Measurement Categories CAT I and CAT O are equivalent. These test

and measurement circuits are not intended for direct connection to the

MAINS building installations of Measurement Categories CAT II, CAT III, or

CAT IV.

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

ni.com

NI-9401

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 and Ex nA IIC T4 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.

Caution For Division 2 and Zone 2 applications, install the system in an

enclosure rated to at least IP54 as defined by IEC/EN 60079-15.

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

be within the following limits.

Capacitance 0.2 µF max

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

Certificate No. 03 ATEX 0324020X and is IECEx UL 14.0089X certified. Each NI 9401 is

marked 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.

NI-9401

Caution You must make sure that transient disturbances do not exceed

140% of the rated voltage.

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

Pollution Degree 2, as defined in IEC 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.

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:

ni.com

NI-9401

■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 Lloyd’s Register (LR) Type Approved for marine (shipboard)

applications. To verify Lloyd’s Register certification for a product, visit ni.com/

certification and search for the LR certificate, or look for the Lloyd’s Register mark

on the product.

Caution 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.

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

NI-9401

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

Table 1. Signal Descriptions

Signal Description

COM Common reference connection to isolated

ground

DIO Digital input/output signal connection

NC No connection

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.

ni.com

NI-9401

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

NI 9401

DIO3:0

Configured

for Output

DIO7:4

Configured

for Input

SPI Device

SCLK

MOSI

MISO

SS DIO0

DIO1

DIO2

DIO4

Connecting Digital Devices

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

Figure 4. Connecting Digital Devices to the NI 9401

+5 V

+5 V DIO1

COM

DIO7

NI 9401LED

Switch

DIO0

TTL Signal DIO3:0

Configured

for Input

DIO7:4

Configured

for Output

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.

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-9401

Located at ni.com/manuals Installs with the software

CompactRIO NI CompactDAQ

RELATED INFORMATION

Servi ces

ni.com/services

C Series Documentation

& Resources

ni.com/info cseriesdoc

NI 9401 Datasheet

NI-RIO Help

LabVIEW FPGA Help

NI 9401 Datasheet

NI-DAQmx Help

LabVIEW Help

Worldwide Support and Services

The NI website is your complete resource for technical support. At ni.com/support,

you have access to everything from troubleshooting and application development

self-help resources to email and phone assistance from NI Application Engineers.

Visit ni.com/services for NI Factory Installation Services, repairs, extended warranty,

and other services.

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

technical support and ensures that you receive important information updates from

NI.

A Declaration of Conformity (DoC) is our claim of compliance with the Council of the

European Communities using the manufacturer’s declaration of conformity. This

system aords the user protection for electromagnetic compatibility (EMC) and

product safety. You can obtain the DoC for your product by visiting ni.com/

certification. If your product supports calibration, you can obtain the calibration

certificate for your product at ni.com/calibration.

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin,

Texas, 78759-3504. NI also has oices located around the world. For telephone

support in the United States, create your service request at ni.com/support or dial

1 866 ASK MYNI (275 6964). For telephone support outside the United States, visit

the Worldwide Oices section of ni.com/niglobal to access the branch oice

ni.com

NI-9401

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