National Instruments SCC-A10 User Manual

USER GUIDE

SCC-A10 Voltage Attenuator Module

The SCC-A10 voltage attenuator module accepts up to two voltage sources
of 60 V maximum amplitude and attenuates each voltage by a factor of 10.
A differential instrumentation amplifier buffers each input signal. The
SCC-A10 contains circuitry capable of protecting E/M Series DAQ
devices for input signals up to 60 VDC.

Conventions

The following conventions are used in this guide:

< > Angle brackets that contain numbers separated by an ellipsis represent

a range of values associated with a bit or signal name—for example,
AO <3..0>.

» The » symbol leads you through nested menu items and dialog box options

to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash. When this symbol is marked on
the product, refer to the Read Me First: Safety and Radio-Frequency
Interference document, shipped with the product, for precautions to take.

When symbol is marked on a product, it denotes a warning advising you to
take precautions to avoid electrical shock.

When symbol is marked on a product, it denotes a component that may be
hot. Touching this component may result in bodily injury.

bold Bold text denotes items that you must select in software, such as menu

items and dialog box options. Bold text also denotes parameter names.

italic Italic text denotes variables, emphasis, a cross reference, or an introduction

to a key concept. Italic text also denotes text that is a placeholder for a word
or value that you must supply.

monospace Text in this font denotes text or characters that you should enter from the

keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames, and extensions.

SC-2345 SC-2345 refers to both the SC-2345 connector block and the SC-2345

configurable connector.

SCC SCC refers to any SCC Series signal conditioning module.

What You Need to Get Started

To set up and use the SCC-A10, you need the following items:

❑ Hardware

–SCC-68

or

– SC-2345/2350 with one of the following:

• SCC-PWR01

• SCC-PWR02 and the PS01 power supply

• SCC-PWR03 (requires a 7 to 42 VDC power supply, not
included)

– One or more SCC-A10

– 68-pin E/M Series DAQ device

– 68-pin cable

– Quick Reference Label

❑ Software

– The latest version of NI-DAQmx

❑ Documentation

– SCC-A10 Voltage Attenuator Module User Guide

– SCC-68 User Guide

or

– SC-2345/2350 User Manual

– SCC Quick Start Guide

SCC-A10 Voltage Attenuator Module User Guide 2 ni.com

– Read Me First: Safety and Radio-Frequency Interference

– Documentation for your hardware

– Documentation for your software

❑ Tools

– 1/8 in. flathead screwdriver

– Numbers 1 and 2 Phillips screwdrivers

– Wire insulation stripper

Note Software scaling of measurements is not supported on the Macintosh operating

system. Refer to the SCC-A10 Module Pin Assignments section.

You can download NI documents from
the latest version of NI-DAQmx, click Download Software at

Device Specific Information

Note For general SCC module installation and signal connection information, and

information about the SC-2345/2350 and SC-68, refer to the SCC Quick Start Guide,
available for download at

Installing the Module

Caution Refer to the Read Me First: Safety and Radio-Frequency Interference document

before removing equipment covers or connecting/disconnecting any signal wires.

You can plug the SCC-A10 into any analog input socket on the
SC-2345/2350 or SCC-68. The socket you choose determines which E/M
Series DAQ device channels receive the SCC-A10 signals, as explained in
the SCC Quick Start Guide.

For single-stage input conditioning, plug the SCC-A10 into any slot of the
SC-68, or any socket of the SC-2345/2350 J(X+1), where X is 0 to 7.
Connect the input-signal wires to the module as described in the SCC Quick
Start Guide.

ni.com/manuals.

ni.com/manuals. To download

ni.com.

If you use the SCC-A10 in a dual-stage configuration in an SC-2345, the
SCC-A10 must be the first-stage module. Plug it into any socket J(X+9) and
plug the second-stage SCC into socket J(X+1), where X is 0 to 7. Connect
the input-signal wires to the SCC-A10 as described in the SCC Quick Start
Guide. The SC-2345 connects the output signals of the SCC-A10 to the

© National Instruments Corporation 3 SCC-A10 Voltage Attenuator Module User Guide