National Instruments NI 9215 Manual de usuario

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9215

4-Channel, ±10 V, 16-Bit Simultaneous Analog

Input Module

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NI 9215 Operating Instructions and Specifications 2 ni.com

This document describes how to use the National Instruments 9215

and includes specifications and terminal assignments for the

NI 9215. In this document, the NI 9215 with screw terminal and

NI 9215 with BNC are referred to inclusively as the NI 9215. Visit

ni.com/info and enter rdsoftwareversion to determine

which software youneed for the modules youare using. For

information about installing, configuring, and programming the

system, refer to the system documentation. Visit ni.com/info

and enter cseriesdoc for information about C Series

documentation.

Note The safety guidelines and specifications in this

document are specific to the NI 9215. The other

components in the system might not meet the same safety

ratings and specifications. Refer to the documentation for

each component in the system to determine the safety

ratings and specifications for the entire system. Visit

ni.com/info and enter cseriesdoc for information

about C Series documentation.

Safety Guidelines

Operate the NI 9215 only as described in these operating

instructions.

Hot Surface This icon denotes that the component may be

hot. Touching this component may result in bodily injury.

Safety Guidelines for Hazardous Voltages

Yo ucan connect hazardous voltages only to the NI 9215 with

screw terminal. Do not connect hazardous voltages to the NI 9215

with BNC.

If hazardous voltages are connected to the module, take the

following precautions. A hazardous voltage is a voltage greater

than 42.4 Vpk or 60 VDC to earth ground.

Caution Ensure that hazardous voltage wiring is

performed only by qualified personnel adhering to local

electrical standards.

Caution Do not mix hazardous voltage circuits and

human-accessible circuits on the same module.

Caution Make sure that devices and circuits connected to

the module are properly insulated from human contact.

Caution When module terminals are hazardous voltage

LIVE (>42.4 Vpk/60 VDC), youmust ensure that devices

NI 9215 Operating Instructions and Specifications 4 ni.com

and circuits connected to the module are properly

insulated from human contact. Youmust use the NI 9932

connector backshell kit to ensure that the terminals are

not accessible.

Figure 1 shows the NI 9932 connector backshell.

Note Youcan use the NI 9932 connector backshell only

with the NI 9215 with screw terminal.

Figure 1. NI 9932 Connector Backshell

Safety Guidelines for Hazardous Locations

The NI 9215 is suitable for use in Class I, Division 2, Groups A, B,

C, D, and T4 hazardous locations; Class I, Zone 2, AEx nC IIC T4

and Ex nC IIC T4 hazardous locations; and nonhazardous locations

only. Follow these guidelines if youare installing the NI 9215 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.

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 Zone 2 applications, install the system

in an enclosure rated to at least IP 54 as defined by

IEC 60529 and EN 60529.

NI 9215 Operating Instructions and Specifications 6 ni.com

Caution For Zone 2 applications, connected signals must

be within the following limit:

Capacitance .......................... 0.2 μF max

Special Conditions for Hazardous Locations Use in Europe

This equipment has been evaluated as EEx nC IIC T4 equipment

under DEMKO Certificate No. 03 ATEX 0324020X. Each module

is marked II 3G and is suitable for use in Zone 2 hazardous

locations. If youare using the NI 9215 in Gas Group IIC hazardous

locations or in ambient temperatures of –40 °C ≤Ta ≤70 °C, you

must use the device in an NI chassis that has been evaluated as

Ex nA IIC T4 equipment.

Special Conditions for Marine Applications

Some modules are Lloyd’s Register (LR) Type Approved for

marine applications. To verify Lloyd’s Register certification, go

to ni.com/certification and search for the LR certificate,

or look for the Lloyd’s Register mark on the module.

Caution To meet radio frequency emission requirements

for marine applications, use shielded cables and install

the system in a metal enclosure. Suppression ferrites

must be installed on power supply inputs near power

entries to modules and controllers. Power supply and

module cables must be separated on opposite sides of

the enclosure, and must enter and exit through opposing

enclosure walls.

NI 9215 Operating Instructions and Specifications 8 ni.com

Connecting the NI 9215

The NI 9215 provides connections for four differential analog

input channels.

Figure 2. Terminal Assignments of the NI 9215 with Screw Terminal

AI0+

AI0–

AI1+

AI1–

AI2+

AI2–

AI3+

AI3–

COM

Figure 3. Connector Assignments of the NI 9215 with BNC

AI3+

AI3–

AI2+

AI2–

AI0+

AI0–

AI1+

AI1–

NI 9215 Operating Instructions and Specifications 10 ni.com

The NI 9215 with screw terminal has a 10-terminal detachable

screw-terminal connector. The NI 9215 with BNC has four BNC

connectors.

Each channel of the NI 9215 has an AI+ terminal or shield to which

youcan connect the positive voltage signal, and an AI– terminal or

shield to which youcan connect the negative voltage signal. The

NI 9215 with screw terminal also has a common terminal, COM,

that is internally connected to the isolated ground reference of the

module.

Note Youmust use 2-wire ferrules to create a secure

connection when connecting more than one wire to a

single terminal on the NI 9215 with screw terminal.

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