National Instruments USB-9237 Manuel utilisateur

USER GUIDE AND SPECIFICATIONS

NI USB-9237

4-Channel, 24-Bit Half/Full-Bridge Analog Input Device

This user guide describes how to use the National Instruments USB-9237

and lists the device specifications. The NI USB-9237 provides a USB

interface for four channels of 24-bit half/full-bridge analog input.

Introduction

The NI USB-9237 consists of two components: an NI 9237 module and an

NI USB-9162 carrier, as shown in Figure 1.

Figure 1. NI USB-9237 Components

NI 9237

NI USB-9162

NI USB-9237

Hi-SPeed USB Carrier

NI USB-9162

Hi-Speed USB Carrier

NI USB-9162

NI USB-9237 User Guide and Specifications 2 ni.com

Dimensions

Figure 2 shows the NI USB-9237 device dimensions.

Figure 2. NI USB-9237 Device in Millimeters (Inches)

Safety Guidelines

Operate the NI USB-9237 only as described in these operating instructions.

Note Although the NI 9237 module may have more stringent certification standards than

the NI USB-9237, when used with the NI USB-9162 carrier, the combined system may be

limited. Refer to the Specifications section for more details.

Hot Surface This icon denotes that the component may be hot. Touching this component

may result in bodily injury.

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 The NI USB-9237 is not certified for use in hazardous locations.

123.67 mm

(4.869 in.)

121.28 mm

(4.775 in.)

120.68 mm

(4.751 in.)

118.29 mm

(4.567 in.)

Hi-Speed USB Carrier

NI USB-9162

88.11 mm

(3.469 in.) 25.08 mm

(0.988 in.)

©National Instruments Corporation 3 NI USB-9237 User Guide and Specifications

Related Documentation

Each application software package and driver includes information about

writing applications for taking measurements and controlling measurement

devices. The following references to documents assume you have

NI-DAQmx 8.7 or later, and where applicable, version 7.1 or later of the

NI application software.

NI-DAQmx for Windows

The DAQ Getting Started Guide describes how to install your NI-DAQmx

for Windows software, your NI-DAQmx-supported DAQ device, and how

to confirm that your device is operating properly. Select Start»All

Programs»National Instruments»NI-DAQ»DAQ Getting Started

Guide.

The NI-DAQ Readme lists which devices are supported by this version of

NI-DAQ. Select Start»All Programs»National Instruments»NI-DAQ»

NI-DAQ Readme.

The NI-DAQmx Help contains general information about measurement

concepts, key NI-DAQmx concepts, and common applications that are

applicable to all programming environments. Select Start»All

Programs»National Instruments»NI-DAQ»NI-DAQmx Help.

LabVIEW

If you are a new user, use the Getting Started with LabVIEW manual to

familiarize yourself with the LabVIEW graphical programming

environment and the basic LabVIEW features you use to build data

acquisition and instrument control applications. Open the Getting Started

with LabVIEW manual by selecting Start»All Programs»National

Instruments»LabVIEW»LabVIEW Manuals or by navigating to the

labview\manuals directory and opening LV_Getting_Started.pdf.

Use the LabVIEW Help, available by selecting Help»Search the

LabVIEW Help in LabVIEW, to access information about LabVIEW

programming concepts, step-by-step instructions for using LabVIEW, and

reference information about LabVIEW VIs, functions, palettes, menus, and

tools. Refer to the following locations on the Contents tab of the LabVIEW

Help for information about NI-DAQmx:

•Getting Started»Getting Started with DAQ—Includes overview

information and a tutorial to learn how to take an NI-DAQmx

measurement in LabVIEW using the DAQ Assistant.

•VI and Function Reference»Measurement I/O VIs and

Functions—Describes the LabVIEW NI-DAQmx VIs and properties.

NI USB-9237 User Guide and Specifications 4 ni.com

•Taking Measurements—Contains the conceptual and how-to

information you need to acquire and analyze measurement data in

LabVIEW, including common measurements, measurement

fundamentals, NI-DAQmx key concepts, and device considerations.

LabWindows/CVI

The Data Acquisition book of the LabWindows/CVI Help contains

measurement concepts for NI-DAQmx. This book also contains Taking an

NI-DAQmx Measurement in LabWindows/CVI, which includes

step-by-step instructions about creating a measurement task using the DAQ

Assistant. In LabWindows™/CVI™, select Help»Contents, then select

Using LabWindows/CVI»Data Acquisition.

The NI-DAQmx Library book of the LabWindows/CVI Help contains API

overviews and function reference for NI-DAQmx. Select Library

Reference»NI-DAQmx Library in the LabWindows/CVI Help.

Measurement Studio

If you program your NI-DAQmx-supported device in Measurement Studio

using Visual C++, Visual C#, or Visual Basic .NET, you can interactively

create channels and tasks by launching the DAQ Assistant from MAX or

from within Visual Studio .NET. You can generate the configuration code

based on your task or channel in Measurement Studio. Refer to the DAQ

Assistant Help for additional information about generating code. You also

can create channels and tasks, and write your own applications in your

ADE using the NI-DAQmx API.

For help with NI-DAQmx methods and properties, refer to the NI-DAQmx

.NET Class Library or the NI-DAQmx Visual C++ Class Library included

in the NI Measurement Studio Help. For general help with programming in

Measurement Studio, refer to the NI Measurement Studio Help, which is

fully integrated with the Microsoft Visual Studio .NET help. To view

this help file in Visual Studio. NET, select Measurement Studio»

NI Measurement Studio Help.

To create an application in Visual C++, Visual C#, or Visual Basic .NET,

follow these general steps:

1. In Visual Studio .NET, select File»New»Project to launch the New

Project dialog box.

2. Find the Measurement Studio folder for the language you want to

create a program in.

3. Choose a project type. You add DAQ tasks as a part of this step.

©National Instruments Corporation 5 NI USB-9237 User Guide and Specifications

ANSI C without NI Application Software

The NI-DAQmx Help contains API overviews and general information

about measurement concepts. Select Start»All Programs»National

Instruments»NI-DAQ»NI-DAQmx Help.

The NI-DAQmx C Reference Help describes the NI-DAQmx Library

functions, which you can use with National Instruments data acquisition

devices to develop instrumentation, acquisition, and control applications.

Select Start»All Programs»NationalInstruments»NI-DAQ»

NI-DAQmx C Reference Help.

.NET Languages without NI Application Software

With the Microsoft .NET Framework version 1.1 or later, you can use

NI-DAQmx to create applications using Visual C# and Visual Basic .NET

without Measurement Studio. You need Microsoft Visual Studio

.NET 2003 or Microsoft Visual Studio 2005 for the API documentation

to be installed.

The installed documentation contains the NI-DAQmx API overview,

measurement tasks and concepts, and function reference. This help is fully

integrated into the Visual Studio .NET documentation. To view the

NI-DAQmx .NET documentation, go to Start»Programs»National

Instruments»NI-DAQ»NI-DAQmx .NET Reference Help. Expand

NI Measurement Studio Help»NI Measurement Studio .NET Class

Library»Reference to view the function reference. Expand NI

Measurement Studio Help»NI Measurement Studio .NET Class

Library»Using the Measurement Studio .NET Class Libraries to view

conceptual topics for using NI-DAQmx with Visual C# and Visual

Basic .NET.

To get to the same help topics from within Visual Studio, go to

Help»Contents. Select Measurement Studio from the Filtered By

drop-down list and follow the previous instructions.

Device Documentation and Specifications

NI-DAQmx includes the Device Document Browser, which contains

online documentation for supported DAQ, SCXI, and switch devices, such

as help files describing device pinouts, features, and operation, and PDF

files of the printed device documents. You can find, view, and/or print the

documents for each device using the Device Document Browser at any

time by inserting the CD. After installing the Device Document Browser,

device documents are accessible from Start»All Programs»National

Instruments»NI-DAQ»Browse Device Documentation.

Note You can download these documents at ni.com/manuals.

NI USB-9237 User Guide and Specifications 6 ni.com

Training Courses

If you need more help getting started developing an application with

NI products, NI offers training courses. To enroll in a course or obtain a

detailed course outline, refer to ni.com/training.

Technical Support on the Web

For additional support, refer to ni.com/support or zone.ni.com.

Installing the Software

Software support for the NI USB-9237 for Windows Vista/XP/2000 is

provided by NI-DAQmx. The DAQ Getting Started Guide, which you can

download at ni.com/manuals, offers NI-DAQmx users step-by-step

instructions for installing software and hardware, configuring channels and

tasks, and getting started developing an application.

Installing Other Software

If you are using other software, refer to the installation instructions that

accompany your software.

Example Programs

The NI-DAQmx CD contains example programs that you can use to get

started programming with the NI USB-9237. Refer to the NI-DAQmx for

USB Devices Getting Started Guide that shipped with your device, and is

also accessible from Start»All Programs»National Instruments»

NI-DAQ,for more information.

Installing the NI USB-9237 Device

Before installing the device, you must install the software you plan to use

with the device. Refer to the Installing the Software section of this guide

and the documentation included with the software for more information.

Installing the NI 9237 in the USB-9162 Carrier

The NI 9237 module and USB-9162 carrier are packaged separately. Refer

to Figure 3, while completing the following assembly steps:

1. Make sure that no signals are connected to the NI 9237 module and the

USB cable is not connected to the device.

2. Remove the protective cover from the 15-pin D-SUB connector.

©National Instruments Corporation 7 NI USB-9237 User Guide and Specifications

3. Align the I/O module with the carrier, as shown in Figure 3.

Figure 3. Module Installation

4. Squeeze the latches and insert the NI 9237 module into the USB-9162

carrier.

5. Press firmly on the connector side of the NI 9237 module until the

latches lock the module into place, as shown in Figure 4.

Figure 4. Locking Module into Place

NI USB-9237 User Guide and Specifications 8 ni.com

Mounting the NI USB-9237 to a Panel

Threaded inserts are located in the NI USB-9237 for mounting it to a panel.

Refer to Figure 5 for dimensions.

Figure 5. Module Dimensions in Millimeters (Inches)

Connecting the NI USB-9237 to a Computer

Plug one end of the USB cable into the NI USB-9237 and the other end into

an available USB port on the computer. Refer to the NI-DAQmx for USB

Devices Getting Started Guide that shipped with your device, and is also

accessible from Start»All Programs»National Instruments»NI-DAQ,

for more information.

LED Indicator

The NI USB-9237 device has a green LED next to the USB connector. The

LED indicator indicates device status, as listed in Table 1. When the device

is connected to a USB port, the LED blinks steadily to indicate that the

device is initialized and is receiving power from the connection.

If the LED is not blinking, it may mean that the device is not initialized or

the computer is in standby mode. In order for the device to be recognized,

the device must be connected to a computer that has NI-DAQmx installed

on it. If your device is not blinking, make sure your computer has the latest

version of NI-DAQmx installed on it, and the computer is not in standby

mode.

72.2 mm

(2.84 in.)

85.7 mm

(3.37 in.)

76.1 mm

(3.00 in.)

Threaded Insert

M3 x 0.5

8.5 mm (0.34 in.) Max Depth

©National Instruments Corporation 9 NI USB-9237 User Guide and Specifications

Wiring the NI USB-9237 Device

The NI USB-9237 has four RJ-50 receptacles that provide connections for

four half or full bridges. Table 2 lists the signal names of the terminals for

each connector, and shows the correlation between the pin numbers of

the RJ-50 10-position/10-conductor (10p10c) modular plug and the

NI USB-9237 receptacle. The NI USB-9237 also has a four-position

connector you can use to connect an external excitation voltage source to

the module. Table 2 lists the connections between an external excitation

voltage source and the NI USB-9237.

Note For a list of accessories available for use with the NI USB-9237, refer to

ni.com/info, and enter info code rd9237.

Table 1. LED State/Device Status

LED State Device Status

Not lit Device not connected or in suspend.

On, not blinking Device connected, but no module installed.

Single-blink Operating normally.

Double-blink Connected to USB Full-Speed port. Device

performance might be affected. Refer to the

Specifications section for more information.

Quadruple-blink Device error. Refer to ni.com/support.

NI USB-9237 User Guide and Specifications 10 ni.com

Caution National Instruments does not recommend using an RJ-45 with the NI USB-9237

because it can physically damage pins 1 and 10 on the device, and thus permanently disable

shunt calibration no matter what connector you use.

Table 2. Terminal Assignments

RJ-50 (10p10c)

Modular Plug

and Receptacle

Pin Numbers RJ-50 Pin RJ-45 Pin

Signal

Name

Signal

Description

1 — SC Shunt calibration

2 1 AI+ Positive input

signal

3 2 AI– Negative input

signal

4 3 RS+ Positive remote

sense signal

5 4 RS– Negative remote

sense signal

6 5 EX+ Positive

excitation signal*

7 6 EX– Negative

excitation signal*

8 7 T+ TEDS data

9 8 T– TEDS return*

10 — SC Shunt calibration

* These signals are shared by all four RJ-50 connectors on the NI USB-9237.

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