National Instruments NI 9351 User manual

GETTING STARTED GUIDE

NI 9351

4-Ch 0-20 mA 16-bit AI, 4-Ch 24 V Sinking DI,

4-Ch 24 V Sourcing DO, SIL3 Capable

This document provides information about connecting and

installing the NI 9351 hardware. You must download a compiled

User Program before deployment. For information about creating

User Programs, deploying safety systems using the NI 9351, and

diagnostics available on the NI 9351, go to ni.com/info and enter

Info Code safetymanual.

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 9351. 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 9351 only as described in this document.

2| ni.com | NI 9351 Getting Started Guide

Caution This icon denotes a caution, which advises

you to consult documentation where this symbol is

marked.

Caution Do not operate the NI 9351 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.

Safety Voltages

Connect only voltages that are within the following limits:

Caution Do not connect hazardous voltages to the

NI 9351. A hazardous voltage is a voltage greater than

42.4 V peak voltage or 60 V DC to earth ground.

Maximum voltages

Vsup-to-COM 30 V DC

DI-to-COM 30 V DC

DO-to-COM 0 V DC to Vsup

NI 9351 Getting Started Guide | © National Instruments | 3

AI-to-COM 20 V DC

AI Vsup-to-COM 30 V DC

Caution DO channels are not protected for negative

voltages or voltages greater than Vsup.

Isolation voltages

Channel-to-earth1 (up to 5,000 m)

Continuous 60 V DC, Measurement

Category I

Withstand 1,000 V RMS, 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

1Channels include Vsup, AI Vsup, and COM.

4| ni.com | NI 9351 Getting Started Guide

equipment, limited-energy parts of equipment, circuits powered

by regulated low-voltage sources, and electronics.

Caution Do not connect the NI 9351 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 for

other circuits 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 9351 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 9351 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 off or the

area is known to be nonhazardous.

NI 9351 Getting Started Guide | © National Instruments | 5

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, 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.

Special Conditions for Hazardous Locations Use in

Europe and Internationally

The NI 9351 has been evaluated as Ex nA IIC T4 Gc equipment

under DEMKO 12 ATEX 1202658X and is IECEx UL 14.0089X

certified. Each NI 9351 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 9351 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.

6| ni.com | NI 9351 Getting Started Guide

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.

EMC 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.

NI 9351 Getting Started Guide | © National Instruments | 7

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.

Refer to the following guidelines to ensure specified EMC

performance.

Notice Operate this product only with shielded cables

and accessories.

Notice Keep the chassis ground connection to the

cable shield as short as possible.

8| ni.com | NI 9351 Getting Started Guide

Special Conditions for Marine Applications

Some products are approved for marine (shipboard) applications.

To verify marine approval certification for a product, visit ni.com/

certification and search for the certificate.

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.

Preparing the Environment

Ensure that the environment in which you are using the NI 9351

meets the following specifications.

Operating temperature

(IEC 60068-2-1, IEC 60068-2-2)

-40 °C to 70 °C

Operating humidity

(IEC 60068-2-30)

10% RH to 90% RH,

noncondensing

NI 9351 Getting Started Guide | © National Instruments | 9

Pollution Degree 2

Maximum altitude 5,000 m

Indoor use only.

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

for complete specifications.

10 | ni.com | NI 9351 Getting Started Guide

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