National Instruments NI 9401 Bedienungsanleitung

NI-9401

GETTING STARTED GUIDE

NI 9401

8 DIO, 5 V/TTL, Bidirectional, 100 ns

This document explains how to connect to the NI 9401.

Note Before you begin, complete the software 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.

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.

2| ni.com | NI 9401 Getting Started Guide

Safety Voltages

Connect only voltages that are within the following limits:

Maximum voltage1

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

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

COM without damaging the module or other devices.

NI 9401 Getting Started Guide | © National Instruments | 3

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.

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

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.

4| ni.com | NI 9401 Getting Started Guide

Caution Do not disconnect I/O-side wires or

connectors unless power has been switched off or the

area is known to be nonhazardous.

Caution Do not remove modules unless power has

been switched off 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

NI 9401 Getting Started Guide | © National Instruments | 5

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 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

6| ni.com | NI 9401 Getting Started Guide

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.

Caution To ensure the specified EMC performance,

operate this product only with shielded cables and

accessories.

Caution To ensure the specified EMC performance,

you must install a clamp-on ferrite bead (782803-01) in

accordance with the product installation instructions.

NI 9401 Getting Started Guide | © National Instruments | 7

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 effectiveness.

8| ni.com | NI 9401 Getting Started Guide

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.

NI 9401 Getting Started Guide | © National Instruments | 9

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