National Instruments 9470 Manuale utente

GETTING STARTED GUIDE

NI 9470

5 V DC to 30 V DC, 8-Channel (Sourcing

Output), 2 kHz C Series Digital Module

This document explains how to connect to the NI 9470.

Note Before you begin, read the NI 9470 Safety,

Environmental, and Regulatory Information document

on ni.com/manuals and complete the software and

hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to

the NI 9470. 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.

Related Documentation

For more information about the NI 9470, read the following

documents on ni.com/manuals.

•NI 9470 Safety, Environmental, and Regulatory Information

•NI 9470 Datasheet

2| ni.com | NI 9470 Getting Started Guide

Cables and Accessories

The following table lists some cables and accessories that are

compatible with the NI 9470. For a complete list of accessories

and ordering information, refer to the pricing section of the

NI 9470 product page on ni.com.

Table 1. NI 9470 Cables and Accessories

Cable/Accessory Part Number

1 M Cable 132410A-01

2 M Cable 132410A-02

5 M Cable 132410A-05

If you would like to build your own cables for the NI 9470, you

will need to purchase the following crimp tools or their

equivalents. Refer to the manufacturer's documentation on

molex.com for more information on building your own cables.

NI 9470 Getting Started Guide | © National Instruments | 3

Table 2. Crimp Tools for Building Your Own Cables

Description Molex Part

Number

Supported Wire

AWG

Hand Crimp Tool for Ultra-

Fit Tangless Crimp

Terminals, 20-22 AWG

(UL1061) Wire

2002184700 22 AWG to 20 AWG

Hand Crimp Tool for Ultra-

Fit Tang-less Crimp

Terminals, 16-18 AWG

(UL1061) Wires

2002184600 18 AWG to 16 AWG

In addition to the provided connector housings, you will need the

following parts for each cable. The Ultra-Fit housing leaves the

crimps exposed at the rear of the housing. NI recommends

insulating the back of the connector with 25 mm (1.0 in.)

diameter heat shrink.

4| ni.com | NI 9470 Getting Started Guide

Table 3. Parts for Building Your Own Cables

Description Molex Part

Number

Support Wire

AWG

Quantity

Ultra-Fit Tangless

Crimp Terminal,

Female, 0.76µm Gold

(Au) Plating, 20-22

AWG

1722536112 22 AWG to 20

AWG

Ultra-Fit Tangless

Crimp Terminal,

Female, 0.76µm Gold

(Au) Plating, 16-18

AWG

1722536012 18 AWG to 16

AWG

NI 9470 Getting Started Guide | © National Instruments | 5

NI 9470 Pinout

COM

Vsup0

Vsup1

Vsup2

Vsup3

Vsup4

Vsup5

Vsup6

Vsup7

COM

DO0–

DO0+

DO1+

DO2+

DO3+

DO4+

DO5+

DO6+

DO7+

DO1–

DO2–

DO3–

DO4–

DO5–

DO6–

DO7–

6| ni.com | NI 9470 Getting Started Guide

Table 4. Signal Descriptions

Signal Description

COM Common reference connection for the power supply

DO- Digital output return (negative) connection

DO+ Digital output source (positive) connection

Vsup DC voltage power supply connection

NI 9470 Block Diagram

NI 9470 Getting Started Guide | © National Instruments | 7

NI 9470

DO–

DO+

Vsup

COM

External

Power

Supply

Device

Amp

ADC

Connecting the NI 9470

You can connect a variety of industrial devices, such as solenoids,

valves, motors, actuators, relays, and lamps to the NI 9470.

Connect the device between the DO+ and DO- pins, and connect

the external power supply. Use cables 20 m or shorter for

connections from DO- and DO+ to the load.

8| ni.com | NI 9470 Getting Started Guide

Connecting an External Power Supply to the

NI 9470

You must connect an external power supply to each active

channel of the NI 9470. The power supplies provide the current

for the output channels. Each channel has its own Vsup and COM

pin, and all COM pins are connected internally in the NI 9470.

Caution Do not install or remove C Series modules

from your system if any external power supplies

connected to the Vsup and COM pins are powered on.

Attention Ne pas installer ou retirer les modules de la

Série C de votre système si une alimentation externe

connectée aux broches Vsup et COM est sous tension.

Complete the following steps to connect an external power

supply to the NI 9470. Use cables 10 m or shorter for connections

from Vsup to COM to the supply to reduce voltage noise and

ripple. For lengths longer than 10 m, NI recommends placing

NI 9470 Getting Started Guide | © National Instruments | 9

more than 2,200 µF of bulk capacitance close to the NI 9470

module.

1. Connect the positive lead of the power supply to Vsup.

2. Connect the negative lead of the power supply to COM.

I/O Protection

Each DO+ channel of the NI 9470 has short-circuit protection.

Each Vsup terminal has reverse polarity protection.

Notice Voltages greater than the supply voltage and

negative voltage conditions on DO+ can damage the

NI 9470.

Notice The DO- terminal is not protected against

overvoltage conditions.

Note Refer to the NI 9470 Datasheet on ni.com/

manuals for maximum continuous output current,

short-circuit behavior, and short-circuit trip time

specifications.

10 | ni.com | NI 9470 Getting Started Guide

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