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Signal
Conditioning
SC-2311 User Manual
Connectivity for 5B and SSR Modules
SC-2311 User Manual
February 2001 Edition
Part Number 322906A-01
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Support
Worldwide Technical Support and Product Information
ni.com
National Instruments Corporate Headquarters
11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 794 0100
Worldwide Offices
Australia 03 9879 5166, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Brazil 011 284 5011,
Canada (Calgary) 403 274 9391, Canada (Ottawa) 613 233 5949, Canada (Québec) 514 694 8521,
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Greece 30 1 42 96 427, Hong Kong 2645 3186, India 91805275406, Israel 03 6120092, Italy 02 413091,
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Singapore 2265886, Spain 91 640 0085, Sweden 08 587 895 00, Switzerland 056 200 51 51,
Taiwan 02 2528 7227, United Kingdom 01635 523545
For further support information, see the Technical Support Resources appendix. To comment on the
documentation, send e-mail to techpubs@ni.com
Copyright © 2001 National Instruments Corporation. All rights reserved.
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Important Information
Warranty
The SC-2311 shielded carrier, SSR Series modules, and 5B Series modules are warranted against defects in materials and workmanship for a
period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair
or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, due to defects
in materials and workmanship, for a period of 90 days from date of shipment, as evidenced by receipts or other documentation. National
Instruments will, at its option, repair or replace software media that do not execute programming instructions if National Instruments receives
notice of such defects during the warranty period. National Instruments does not warrant that the operation of the software shall be
uninterrupted or error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside of the package before
any equipment will be accepted for warranty work. National Instruments will pay the shipping costs of returning to the owner parts which are
covered by warranty.
National Instruments believes that the information in this document is accurate. The document has been carefully reviewed for technical
accuracy. In the event that technical or typographical errors exist, National Instruments reserves the right to make changes to subsequent
editions of this document without prior notice to holders of this edition. The reader should consult National Instruments if errors are suspected.
In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it.
XCEPT AS SPECIFIED HEREIN,NATIONAL INSTRUMENTS MAKES NO WAR RANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DI SCLAIMS ANY WARRANTY OF
E
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER.NATIONAL INS TRUMENTS WILL NOT BE LIABLE FOR
DAMAGES RESULTING FROM LOSS OF DATA
. This limitation of the liability of NationalInstruments will apply regardless of the form ofaction, whether in contract or tort, including
THEREOF
negligence. Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments
shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided herein does not cover
damages, defects, malfunctions, or service failures caused by owner’s failure to follow the National Instruments installation, operation, or
maintenance instructions; owner’s modification of the product; owner’s abuse, misuse, or negligent acts; and power failure or surges, fire,
flood, accident, actions of third parties, or other events outside reasonable control.
, PROFITS, USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY
Copyright
Under the copyright laws, this publication may not be reproduced or transmitted in any form,electronic or mechanical, including photocopying,
recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National
Instruments Corporation.
Trademarks
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Product and company names mentioned herein are trademarks or trade names of their respective companies.
.CUSTOMER’S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF
WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
(1) NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF
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(2) IN ANY APPLICATION, INCLUDING THE ABOVE, RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE
IMPAIRED BY ADVERSE FACTORS, INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY,
COMPUTER HARDWARE MALFUNCTIONS, COMPUTER OPERATING SYSTEM SOFTWARE FITNESS, FITNESS OF COMPILERS
AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION, INSTALLATION ERRORS, SOFTWARE AND
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DEVICES, TRANSIENT FAILURES OF ELECTRONIC SYSTEMS (HARDWARE AND/OR SOFTWARE), UNANTICIPATED USES OR
MISUSES, OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER (ADVERSE FACTORS SUCHAS THESE ARE
HEREAFTER COLLECTIVELY TERMED “SYSTEM FAILURES”). ANY APPLICATION WHERE A SYSTEM FAILURE WOULD
CREATE A RISK OF HARM TO PROPERTY OR PERSONS (INCLUDING THE RISK OF BODILY INJURY AND DEATH) SHOULD
NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE. TO AVOID
DAMAGE, INJURY, OR DEATH, THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO
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Conventions
The following conventions appear in this manual:
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.
bold Bold text denotes items that you must select or click on in the 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. This font 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, and code excerpts.
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Contents
Chapter 1
Introduction
About the SC-2311, 5B Series Modules, and SSR Series Modules ..............................1-2
What You Need to Get Started ......................................................................................1-3
Unpacking......................................................................................................................1-4
Chapter 2
Configuring and Setting Up the SC-2311
Configuring the SC-2311...............................................................................................2-1
Setting SW5.....................................................................................................2-4
Setting SW4.....................................................................................................2-4
Setting SW3.....................................................................................................2-4
Setting SW2.....................................................................................................2-5
Safety Information .........................................................................................................2-5
Using the I/O Panelettes ................................................................................................2-7
I/O Panelette Labels ........................................................................................2-8
Mounting the SC-2311...................................................................................................2-9
Chapter 3
5B Series Modules
Overview........................................................................................................................3-1
5B30, 5B31, 5B40, 5B41 Voltage Input Module ..........................................................3-2
5B32 Process Current Input Module .............................................................................3-2
5B34 RTD Input—Isolated 2- or 3-Wire RTD Module ................................................3-2
5B35 RTD Input—Isolated 4-Wire RTD Module .........................................................3-3
5B36 Potentiometer Input Module ................................................................................3-3
5B37 Thermocouple Input Module with Cold-Junction Compensation........................3-3
5B38 Strain-Gauge Input Module..................................................................................3-4
5B42 Process Current Input Module with 20 VDC Loop .............................................3-4
5B45/46 Frequency Input Module .................................................................................3-4
5B47 Linearized Thermocouple Input Module with Cold-Junction Compensation......3-5
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Contents
Chapter 4
SSR Series Modules
Overview ....................................................................................................................... 4-1
Input Modules................................................................................................................ 4-1
SSR-IAC-5, 120 VAC..................................................................................... 4-2
SSR-IAC-5A, 240 VAC.................................................................................. 4-2
SSR-IDC-5, 3–32 VDC................................................................................... 4-3
Output Modules ............................................................................................................. 4-3
SSR-OAC-5, 120 VAC ................................................................................... 4-4
SSR-OAC-5A, 240 VAC ................................................................................ 4-5
SSR-ODC-5, 3–60 DVC ................................................................................. 4-5
Appendix A
Specifications
Appendix B
5B Series Module Data Sheets
Appendix C
Power Requirements for the SC-2311 with 5B and SSR Series Modules
Appendix D
Technical Support Resources
Glossary
Index
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Figures
Tables
Contents
Figure 2-1. SC-2311 Top Cover Removal ...............................................................2-2
Figure 2-2. SC-2311 Parts Locator Diagram ...........................................................2-3
Figure 2-3. NRSE, and RSE or DIFF Mode Circuits...............................................2-4
Figure 2-4. Installing an I/O Panelette .....................................................................2-8
Figure 2-5. Installing an I/O Panelette Label...........................................................2-9
Figure 2-6. Rack-Mount Option...............................................................................2-10
Figure 2-7. Stack-Mount Option .............................................................................. 2-11
Figure 4-1. SSR-IAC AC Input Diagram.................................................................4-2
Figure 4-2. SSR-IDC DC Input Diagram.................................................................4-3
Figure 4-3. SSR-OAC AC Output Diagram ............................................................4-4
Figure 4-4. SSR-ODC DC Output Diagram ............................................................4-6
Table C-1. 5B Series Current Requirements ...........................................................C-1
Table C-2. SSR Series Current Requirements.........................................................C-2
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Introduction
This manual describes the electrical and mechanical aspects of the
SC-2311 shielded carrier, 5B Series modules, SSR Series modules, and
accessory terminal blocks. It also describes how to configure, connect, and
customize the SC-2311 for use with National Instruments E Series data
acquisition (DAQ) devices.
The SC-2311 shielded carrier interfaces with the following signal
conditioning modules:
• Analog signal conditioning
• Digital signal conditioning
1
– 5B30, 5B31, 5B40, 5B41 voltage input modules
– 5B32 process-current input modules
– 5B34 RTD input, isolated 2- or 3-wire RTD modules
– 5B35 RTD input, isolated 4-wire RTD modules
– 5B36 potentiometer input modules
– 5B37 thermocouple input with cold-junction
compensation modules
– 5B42 process-current input with regulated 20 VDC loop modules
– 5B47 linearized thermocouple input with cold-junction
compensation modules
– 5B38 strain-gauge input modules
– 5B45/46 frequency input modules
– SSR-IAC-5 input module (120 VAC)
– SSR-IAC-5A input module (240 VAC)
– SSR-IDC-5 input module (3 to 32 VDC)
– SSR-OAC-5 output module (120 VAC)
– SSR-OAC-5A output module (240 VAC)
– SSR-ODC-5 output module (3 to 60 VDC)
© National Instruments Corporation 1-1 SC-2311 User Manual
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Chapter 1 Introduction
About the SC-2311, 5B Series Modules,
and SSR Series Modules
This section describes the SC-2311 shielded carrier, 5B Series modules,
and SSR Series modules. It also lists what you need to get started, and
explains how to unpack your SC-2311 and signal conditioning modules.
The SC-2311 connects signals to E Series DAQ devices. The SC-2311 can
interface up to eight 5B Series modules and eight SSR Series modules
simultaneously. When used with the 5B Series modules, SSR Series
modules, and a shielded 68-pin E Series cable, the SC-2311 offers a clean,
easy-to-use solution to analog and digital signal conditioning that is both
portable and rugged. The SC-2311 also provides 50 terminal block
connections for non-isolated measurements. This feature allows you direct
access to the I/O signals from the E Series DAQ device.
The SC-2311 has internal terminal blocks for connecting to the 5B Series
modules as well as the SSR Series modules. The SC-2311 allows you to
optimize connectivity to the terminal blocks through the use of panelettes.
The SC-2311 shielded carrier has a portable enclosure, and is ideal for
laptop and desktop applications.
The 5B Series modules along with the SC-2311 provide a
high-performance, inexpensive means of analog signal conditioning. You
can insert the 5B Series modules into any of the eight available slots on the
carrier. The 5B Series modules, along with the SC-2311, provide analog
input measurements such as voltage, current, resistance, temperature,
strain, and frequency.
The SSR Series modules along with the SC-2311 provide an easy-to-use
means of digitally controlling or sensing voltages from field devices.
The SSR Series modules are high-performance, fully encapsulated devices
that you can insert into any of the eight available slots on the SC-2311.
The SC-2311 also has light emitting diodes (LEDs) that indicate the status
of each SSR Series module.
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What You Need to Get Started
To set up and use the SC-2311 you need the following items:
❑
SC-2311 shielded carrier
❑
Up to eight of the following 5B Series modules for analog signal
conditioning
– 5B30/31
– 5B32
– 5B34
– 5B35
– 5B36
– 5B37
– 5B38
– 5B40/41
– 5B42
– 5B45/46
– 5B47
Chapter 1 Introduction
❑
Up to eight of the following SSR Series modules for digital signal
conditioning
– SSR-IAC-5
– SSR-IAC-5A
– SSR-IDC-5
– SSR-OAC-5
– SSR-OAC-5A
– SSR-ODC-5
SC-2311 User Manual
❑
❑
External power supply (supplied)
❑
68-pin E Series DAQ device, documentation, and 68-pin E Series
cable
❑
Flathead screwdriver 0.1 in. (supplied)
❑
Number 1 and 2 Phillips-head screwdrivers
© National Instruments Corporation 1-3 SC-2311 User Manual
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Chapter 1 Introduction
Unpacking
❑
Wire-insulation strippers
❑
NI-DAQ 6.9 or later (driver software)
❑
One or more I/O panelettes and label sheet
Your SC-2311 shielded carrier is shipped in a cardboard box. The 5B
and SSR Series modules are shipped in antistatic packaging to prevent
electrostatic damage to the modules. Electrostatic discharge can damage
several components on these products. To avoid such damage when you
handle the products, take the following precautions:
• Ground yourself by using a grounding strap or by touching a grounded
object.
• Touch the antistatic package to a metal part of your computer chassis
before removing the modules from the packaging.
Caution
Never touch the exposed pins of connectors.
• Remove the modules from the packaging and inspect the modules for
any sign of damage. Notify National Instruments if the modules appear
damaged in any way. Do not install a damaged module into your
system.
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Configuring and Setting Up
the SC-2311
This chapter explains how to configure the SC-2311, provides safety
information, and explains how to install I/O panelettes and mounting
accessories.
Configuring the SC-2311
The SC-2311 contains the following slide switches that are used to
configure the device:
• SW5
• SW4
• SW3
• SW2
You must configure these slide switches prior to operating the SC-2311. To
access the slide switches, remove the eight top cover screws and the top
cover as shown in Figure 2-1. See Figure 2-2 for switch locations.
2
© National Instruments Corporation 2-1 SC-2311 User Manual
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Chapter 2 Configuring and Setting Up the SC-2311
1
2
3
1 Top Cover Screws 2TopCover 3 SC-2311
Figure 2-1. SC-2311 Top Cover Removal
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Chapter 2 Configuring and Setting Up the SC-2311
6321 4 5
7
1SW5
2SW4
3SW3
4 5B Series Modules
5 SSR Series Modules
6SW2
7 Safety Ground
Figure 2-2. SC-2311 Parts Locator Diagram
© National Instruments Corporation 2-3 SC-2311 User Manual
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Chapter 2 Configuring and Setting Up the SC-2311
Setting SW5
Setting SW5 to the AIGND/AISENSE SHORT position allows the
E Series DAQ device to operate in nonreferenced single-ended (NRSE)
mode. Use this switch setting when you are using 5B Series modules to
take measurements. In this mode, AIGND connects the negative input to
the PGIA on the E Series DAQ device through the AISENSE pin as shown
in Figure 2-3.
5B
(DIFF)
INX+
IN
X–
Setting SW4
+5V
(NRSE)
ACH
AIGND
SC-2311
ACH0
X
SW5
ACH15
AISENSE
AIGND
E Series DAQ Device in NRSE Mode
NI-PGIA
Gain Amplifier
Analog
+
Multiplexer
–
Figure 2-3. NRSE, and RSE or DIFF Mode Circuits
When the E Series DAQ device operates in referenced single-ended (RSE)
or differential (DIFF) mode, set SW5 to NC. When SW5 is in the NC
position it breaks the connection between AISENSE and AIGND as shown
in Figure 2-3. Use this setting if you are not using 5B modules to take
measurements.
Setting SW4 to the SPLY GND/AIGND SHORT position allows the
5B Series modules to function properly when using the external power
supply. This switch setting short circuits the external supply ground to the
AIGND of the E Series DAQ device. In most cases, SW4 should remain in
the SPLY GND/AIGND SHORT position.
Setting SW3
Setting SW3 to the EXT +5V (5B) position powers the 5B modules using
the external power supply. In this mode, it is necessary to connect the
external power supply to power the 5B Series modules. For the best
performance, set SW3 to the EXT +5V (5B) position and use the external
power supply.
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Note
device you have selected. When using the Board +5V (5B) setting, it is necessary to know
the current requirements of the 5B Series modules and the current available from the DAQ
device you are using. See Appendix C, Power Requirements for the SC-2311 with 5B and
SSR Series Modules, for more details.
Setting SW2
Note
device you have selected. When using the Board +5V (SSR) setting, it is necessary to know
the current requirements of the SSR Series modules and the current available from the
DAQ device you are using.
Chapter 2 Configuring and Setting Up the SC-2311
Setting SW3 to the Board +5V (5B) position powers the 5B modules using
the E Series DAQ device +5 V supply. In this mode, you can power the
5B Series modules directly from the E Series DAQ device.
The maximum current that the DAQ device can deliver depends on which DAQ
Setting SW2 to the EXT +5V (SSR) position powers the SSR modules
using the external power supply. In this mode, you must connect the
external power supply to power the SSR Series modules.
Setting SW2 to the Board +5V (SSR) position powers the SSR modules
using the E Series DAQ device +5 V supply. In this mode, you can power
the SSR Series modules directly from the E Series DAQ device.
The maximum current that the DAQ device can deliver depends on which DAQ
Safety Information
Cautions
flammable gases or fumes.
Keep away from live circuits. Do not remove equipment covers or shields unless you are
trained to do so. If signal wires are connected to the device, hazardous voltages can exist
even when the equipment is turned off. To avoid a shock hazard, do not perform procedures
involving cover or shield removal unless you are qualified to do so and disconnect all field
power prior to removing covers or shields.
Equipment described in this document must be used in an Installation Category II
environment per IEC 60664-1.
Do not operate damaged equipment. The safety protection features built into this device
1
Category II refers to local-level power distribution, such as that provided by a standard wall outlet.
© National Instruments Corporation 2-5 SC-2311 User Manual
Do not operate the device in an explosive atmosphere or where there may be
1
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Chapter 2 Configuring and Setting Up the SC-2311
can become impaired if the device becomes damaged in any way. If the device is damaged,
turn the device off and do not use it until service-trained personnel can check its safety.
If necessary, return the device to National Instruments for service and repair to ensure that
its safety is not compromised.
Do not operate this equipment in a manner that contradicts the information specified in this
document. Misuse of this equipment could result in a shock hazard.
Do not substitute parts or modify equipment. Because of the danger of introducing
additional hazards, do not install unauthorized parts or modify the device. Return the
device to National Instruments for service and repair to ensure that its safety features are
not compromised.
Yo u must insulate all of your signal connections to the highest voltage with which the
SC-2311 can come in contact.
When using the device with high common-mode voltages, you must insulate your signal
wires for the highest input voltage. National Instruments is not liable for any damages or
injuries resulting from inadequate signal wire insulation. Use only 26–14 AWG wire with
a minimum voltage rating of 300 V and a temperature value of 60 °C for measuring up
to 300 V.
When connecting or disconnecting signal lines to the SC-2311 screw terminals, make sure
the lines are powered off. Potential differences between the lines and the SC-2311 ground
can create a shock hazard while you connect the lines.
Connections, including power signals to ground and vice versa, that exceed any of the
maximum signal ratings on the SC-2311 device can create a shock or fire hazard, or can
damage any or all of the boards connected to the SC-2311, the host computer, and the
SC-2311 device. National Instruments is not liable for any damages or injuries resulting
from incorrect signal connections.
If hazardous voltages (≥30 V
and42.4V
rms
or 60 VDC) are present, you must connect
peak
a safety earth-ground wire to the safety-ground screw terminal, shown in Figure 2-2. This
complies with safety agency requirements and protects against electric shock when the
SC-2311 is not connected to an installed DAQ device. To connect the safety earth-ground
to the safety-ground screw terminal, run an earth-ground wire from the signal source to the
screw terminal. National Instruments is not liable for any damages or injuries resulting
from inadequate safety earth-ground connections.
Clean the SC-2311 and accessories by brushing off light dust with a soft nonmetallic brush.
Remove other contaminants with a stiff nonmetallic brush. The unit must be completely
dry and free from contaminants before returning it to service.
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Using the I/O Panelettes
Select configurable I/O panelettes appropriate for the I/O connectivity
needs of your application. The I/O panelettes have standard prewired I/O
connectors. You can install I/O panelettes on the front of the SC-2311
enclosure.
Youcaninstallupto18single-widthI/OpanelettesintheSC-2311
enclosure. You can mix all types of I/O panelettes to produce custom I/O
combinations.
Note
The strain-relief and 9-pin D-subminiature I/O panelettes require two panelette
spaces. The dual 9-pin D-sub I/O panelette requires three panelette spaces.
Each thermocouple and BNC I/O panelette accommodates two connectors.
Use the strain-relief I/O panelettes to connect large numbers of wires
directly to your internal accessory. You can machine the blank
I/O panelettes to make custom I/O panelettes to suit your application.
Use the preconfigured I/O panelettes to quickly connect and disconnect
standard connectors.
Chapter 2 Configuring and Setting Up the SC-2311
Note
For RF emission compliance, you cannot use BNC panelettes.
RefertoFigure2-4andusethefollowingstepstoinstallanyofthe
I/O panelettes:
1. Choose one of the I/O panelettes to install.
2. Place the lower edge of the I/O panelette in the groove at the bottom of
the enclosure opening.
3. Tilt the I/O panelette top back into the enclosure.
4. Secure the I/O panelette with either one, two, or three of the M2.5 × 6
panhead screws (depending on the type of I/O panelette) that are
included with the panelette.
5. Repeat steps 1 through 4 until you have installed all your non-blank
I/O panelettes.
6. Install a blank I/O panelette in any unused panelette opening.
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Chapter 2 Configuring and Setting Up the SC-2311
NATIONA L
INSTRUMENTS
Signal Conditioning with Configurable Connectors
1
2
4
3
5
1 Thermocouple I/O Panelette
2M2.5× 6Screw
3 BNC I/O Panelette
I/O Panelette Labels
SC-2311
6
7
4 Strain-Relief I/O Panelette
5 D-Sub I/O Panelette
Figure 2-4. Installing an I/O Panelette
Each SC-2311 ships with a sheet of labels for you to apply to your I/O
panelettes as shown in Figure 2-5. The label sheet has both preprinted and
blank labels. You can customize the blank labels to suit your application.
You can use two labels on single-width I/O panelettes and three or more
labels on wider panelettes.
6 Dual D-Sub I/O Panelette
7 Blank I/O Panelette
Caution
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Do not use a panelette for signals that exceed the panelette rating.
1 I/O Panelette 2 Label
Mounting the SC-2311
To install your SC-2311 enclosure in a standard 19 in. rack, install the
optional rack-mount kit. To use your SC-2311 enclosure in a desktop
stacking configuration install the optional stack-mount kit.
Chapter 2 Configuring and Setting Up the SC-2311
2
1
Figure 2-5. Installing an I/O Panelette Label
Refer to Figure 2-6 and use the following steps to install the rack-mount kit
on your SC-2311 enclosure:
1. Attach a rack-mount bracket to one side of the enclosure with
four 4-40 × 1/4 in. screws from the rack-mount kit.
2. Attach a rack-mount bracket to the other side of the enclosure with
four 4-40 × 1/4 in. screws from the rack-mount kit.
Note
You must remove the rubber feet from the bottom of the SC-2311 enclosure for use
in rack-mount applications.
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Chapter 2 Configuring and Setting Up the SC-2311
NATIONAL
INSTRUMENTS
2
1
NATIONAL
INSTRUMENTS
Signal Conditioning with Configurable Connectors
SC-2311
NATIONAL
INSTRUMENTS
1 4-40x1/4in.Screws 2 Rack-Mount Brackets
Figure 2-6. Rack-Mount Option
Refer to Figure 2-7 and use the following steps to install the stack-mount
kit on your SC-2311 configurable connector enclosure:
1. Attach the stack-mount brackets to both ends of the lower
enclosure with the 4-40 × 1/4 in. flathead screws from the
stack-mount kit.
2. Place the upper enclosure on top of the lower enclosure.
3. Attach the stack-mount brackets to both ends of the upper
enclosure with the 4-40 × 1/4 in. flathead screws from the
stack-mount kit.
Note
You must remove the rubber feet from all but the bottom enclosure before stacking
the enclosures.
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Chapter 2 Configuring and Setting Up the SC-2311
1
NATIONAL
INSTRUMENTS
Signal Conditioning with Configurable Connectors
SC-2311
1
2
14-40×1/4 in. Flathead Screws 2 Stack-Mount Brackets
Figure 2-7.
Stack-Mount Option
You can stack additional enclosures by using additional stack-mount kits.
You can remove the stack-mount kit handles, if necessary, by removing the
two screws that attach the handle.
Note
You can also use the stack-mounting brackets as handles.
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5B Series Modules
This chapter describes the 5B Series modules you can use with the
SC-2311.
Overview
You can use 5B Series modules with the SC-2311 to perform per-channel
analog signal conditioning with National Instruments E Series DAQ
devices. The 5B Series modules are inserted in an eight-channel backplane
within the SC-2311. The 5B Series modules provide isolation, noise
rejection, and amplification for millivolt sources, volt sources, 4–20 mA
sources, 0–20 mA sources, RTDs, thermocouples, strain gauges,
potentiometers, and frequency inputs.
Install panelettes in the front of the SC-2311 to connect to your I/O signals.
Connect the panelettes to the input terminal blocks of corresponding 5B
channels. After the signals are conditioned, they are routed through a
shielded 68-position cable to an E Series DAQ device for measurement.
3
The 5B Series modules include the following:
• 5B30, 5B31, 5B40, 5B41 voltage input modules
• 5B32 process current input modules
• 5B34 RTD input—isolated 2- or 3-wire RTD modules
• 5B35 RTD input—isolated 4-wire RTD modules
• 5B36 potentiometer input modules
• 5B37 thermocouple input modules with cold-junction compensation
• 5B38 strain gauge input modules
• 5B42 process current input modules with regulated 20 VDC loop
• 5B45/46 frequency input modules
• 5B47 linearized thermocouple input modules with cold-junction
compensation
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Chapter 3 5B Series Modules
See Appendix C, Power Requirements for the SC-2311 with 5B and SSR
Series Modules, to calculate the power requirements for your 5B Series
modules.
5B30, 5B31, 5B40, 5B41 Voltage Input Module
The 5B Series voltage input modules can accept input measurement ranges
from ±10 mV to ± 20 V. These modules scale the input voltage to a ±5 V
range that is routed from the SC-2311 to the E Series DAQ device for
measurement.
You can insert and use the 5B Series voltage input modules in any of the
eight 5B channels inside the SC-2311.
5B32 Process Current Input Module
The 5B32 process current input modules can accept either 4–20 mA or
0–20 mA and scale this current to a 0–5 V signal. This measurement is
accomplished by reading the voltage across a precision 20 Ω resistor that is
included with the 5B32 module. These modules scale the input current to a
0–5 V output signal that is routed from the SC-2311 to the E Series DAQ
device for measurement.
You can insert and use the 5B32 process current input modules in any of the
eight 5B channels inside the SC-2311.
5B34 RTD Input—Isolated 2- or 3-Wire RTD Module
The 5B34 RTD input modules are capable of making isolated 2- or 3-wire
RTD measurements and can accept a large variety of different RTD types.
The 5B34 modules scale the RTD temperature measurement to a 0–5V
output signal that is routed from the SC-2311 to the E Series DAQ device
for measurement.
You can insert and use the 5B34 RTD input modules in any of the eight
5B channels inside the SC-2311.
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Chapter 3 5B Series Modules
5B35 RTD Input—Isolated 4-Wire RTD Module
The 5B35 RTD input modules are capable of making isolated 4-wire RTD
measurements. Like the 5B34, the 5B35 scales the RTD temperature
measurement into a 0–5 V output signal that the E Series DAQ device can
measure.
You can insert and use the 5B35 RTD input modules in any of the eight
5B channels inside the SC-2311.
5B36 Potentiometer Input Module
The 5B36 potentiometer input modules accept a wide variety of 3-wire
potentiometers and 2-wire rheostats. The 5B36 scales the potentiometer
measurement into an accurate 0–5 V output signal that is routed from the
SC-2311 to the E Series DAQ device for measurement.
You can insert and use the 5B36 potentiometer input modules in any of the
eight 5B channels inside the SC-2311.
5B37 Thermocouple Input Module with
Cold-Junction Compensation
The 5B37 thermocouple input module is capable of accepting input signals
from J, K, T, E, R, S, and B type thermocouples. The 5B37 also uses
cold-junction compensation circuitry, which is part of the SC-2311
accessory, to compensate for the parasitic thermocouples formed at the
input screw terminals of the SC-2311. The 5B37 scales the input signals
from the thermocouples into a 0–5 V output signal that is routed from the
SC-2311to the E Series DAQ device for measurement.
You can insert and use the 5B37 thermocouple input modules in any of the
eight 5B channels inside the SC-2311.
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Chapter 3 5B Series Modules
5B38 Strain-Gauge Input Module
The 5B38 strain-gauge input module features a bandwidth of 10 kHz. The
5B38 accepts input signals from full- and half-bridge 300 Ω to 10 kΩ
transducers. The 5B38 also provides a +10 V excitation and produces an
output signal of –5 to +5 V that is routed from the SC-2311 to the E Series
DAQ device for measurement.
You can insert and use the 5B38 strain-gauge input modules in any of the
eight 5B channels inside the SC-2311.
5B42 Process Current Input Module with 20 VDC Loop
The 5B42 process current input module interfaces with 2-wire transmitters
and provides an isolated, regulated 20 V supply for current measurement.
The module filters and amplifies the 4–20 mA process-current input to
produce an accurately scaled, low-noise, low-impedance output of +1 to
+5Vor+2to+10V.
You can insert and use the 5B42 process current input modules in any of the
eight 5B channels inside the SC-2311.
5B45/46 Frequency Input Module
The 5B45 frequency input modules accept full-scale frequency signals
ranging from 500 Hz to 20 kHz. The 5B46 frequency input modules accept
full-scale frequency signals from 20 kHz to 275 kHz. Each module scales
the frequency input to a 0–5 V output signal that is routed from the
SC-2311 to the DAQ device for measurement.
You can insert and use the 5B45/46 frequency input modules in any of the
eight 5B channels inside the SC-2311.
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Chapter 3 5B Series Modules
5B47 Linearized Thermocouple Input Module with
Cold-Junction Compensation
The 5B47 linearized thermocouple input module is capable of accepting
input signals from J, K, T, E, R, S, and B type thermocouples. The 5B47
also uses cold-junction compensation circuitry, which is part of the
SC-2311 accessory, to compensate for the parasitic thermocouples formed
at the input screw terminals of the SC-2311. The 5B47 linearly scales the
thermocouples temperature into a 0–5 V signal that is routed form the
SC-2311 to the E Series DAQ device for measurement.
You can insert and use the 5B47 linearized thermocouple input modules in
any of the eight 5B channels inside the SC-2311.
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SSR Series Modules
This chapter describes the SSR Series modules you can use with the
SC-2311.
Overview
SSR Series modules optically isolate field signals from the E Series DAQ
device, preventing computer damage caused by overvoltage transients in
your field wiring.
Note
All SSR Series modules use negative logic.
The SSR Series modules include the following:
• Input modules
– SSR-IAC-5, 120 VAC
– SSR-IAC-5A, 240 VAC
– SSR-IDC-5,3to32VDC
• Output modules
– SSR-OAC-5, 120 VAC
– SSR-OAC-5A, 240 VAC
– SSR-ODC-5,3to60VDC
4
See Appendix C, Power Requirements for the SC-2311 with 5B and SSR
Series Modules, to find the power requirements for your SSR Series
modules.
Input Modules
Input SSR Series modules sense voltages from a field source and return a
logic value to the E Series DAQ device. If a voltage within the selected
input range for the input module is present, it returns a logic low signal to
the DAQ device, otherwise it returns a logic high signal.
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Chapter 4 SSR Series Modules
SSR-IAC-5, 120 VAC
The SSR-IAC-5 input module senses 90–140 VAC/DC from a field source
and converts it into a TTL logic signal. When a signal in this voltage range
is detected at its input, the SSR generates a logic low signal on the
corresponding DIO line of the E Series DAQ device. Otherwise, the SSR
returns a logic high signal. Figure 4-1 shows the SSR-IAC circuit diagram.
Rx
1
VAC
2
You can insert and use the SSR-IAC-5 in any of the eight SSR sockets
inside the SC-2311.
SSR-IAC-5A, 240 VAC
The SSR-IAC-5A input module senses 180–280 VAC/DC from a field
source and converts it into a TTL logic signal. When a signal in this voltage
range is detected at its input, the SSR generates a logic low signal on the
corresponding DIO line of the E Series DAQ device. Otherwise, the SSR
returns a logic high signal. Figure 4-1 shows the SSR-IAC circuit diagram.
You can insert and use the SSR-IAC-5A in any of the eight SSR sockets
inside the SC-2311.
+V
cc
Output
Ground
3
4
5
Input
Voltage
Hysterisis Circuit
Current
Regulating
Figure 4-1. SSR-IAC AC Input Diagram
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SSR-IDC-5, 3–32 VDC
The SSR-IDC-5 input module senses 3–32 VDC from a field source and
converts it into a TTL logic signal. When a signal in this voltage range
is detected at its input, the SSR generates a logic low signal on the
corresponding DIO line of the E Series DAQ device. Otherwise, the SSR
returns a logic high signal. Figure 4-2 shows the SSR-IDC circuit diagram.
Chapter 4 SSR Series Modules
Output Modules
+
VDC
–
+V
cc
Output
Ground
Figure 4-2. SSR-IDC DC Input Diagram
Rx
1
2
Input
3
4
5
Voltage
Hysterisis Circuit
Current
Regulating
You can insert and use the SSR-IDC-5 in any of the eight SSR sockets
inside the SC-2311.
SSR Series output modules use DIO lines on an E Series DAQ device to
control external devices. If a DIO line sends a logic low signal, the output
module turns on and current flows. If the DIO line sends a logic high signal,
the output module turns off.
SSR Series output modules are similar to conventional relays, but there are
some important differences. Unlike conventional relays, solid state relays
require voltage on the load side. Current needs to flow through them in the
on state, or they turn off even if a logic low signal is at their input. This
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Chapter 4 SSR Series Modules
occurrence is referred to as dropout. If a solid state relay drops out, you
must turn it off with a logic high signal before you can turn it on again.
The dropout voltage and current specifications for the output modules are
given in Appendix A, Specifications. For most control applications, such as
controlling motors or lamps, these requirements are not difficult to meet.
Another difference between these output modules and conventional relays
is that they do not turn off completely. A small leakage current flows all the
time, even in the off state. For most control applications, this current causes
no problems.
SSR-OAC-5, 120 VAC
The SSR-OAC-5 output module uses a DIO line from the E Series DAQ
device to switch an external 24–140 VAC load at up to 3.5 A. When the
E Series DAQ device DIO line sends a logic low, this turns on the
corresponding SSR-OAC-5 module and allows current to flow. If a logic
high is sent, the module turns off. Figure 4-3 shows the SSR-OAC circuit
diagram.
Load
VAC
Load
+
DC Control
–
1
2
3
4
Snubber
Trigger
Circuit
Rx
Figure 4-3. SSR-OAC AC Output Diagram
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Unlike conventional relays, the SSR-OAC-5 output module has a zero
voltage turn-on of the load. The SSR-OAC-5 also requires a minimum
output voltage and current to remain in the on state.
You can insert and use the SSR-OAC-5 in any of the eight SSR sockets
inside the SC-2311.
SSR-OAC-5A, 240 VAC
The SSR-OAC-5A output module uses a DIO line from the E Series DAQ
device to switch an external 24–280 VAC load at up to 3.5 A. When the
E Series DAQ device DIO line sends a logic low, this turns on the
corresponding SSR-OAC-5A module and allows current to flow. If a logic
high is sent, the module turns off.
You can insert and use the SSR-OAC-5A in any of the eight SSR sockets
inside the SC-2311.
SSR-ODC-5, 3–60 DVC
The SSR-ODC-5 output module uses a DIO line from the E Series DAQ
device to switch an external 3–60VDCloadatupto3A.Whenthe
E Series DAQ device DIO line sends a logic low, this turns on the
corresponding SSR-ODC-5 module and allows current to flow. If a logic
high is sent, the module turns off. Figure 4-4 shows the SSR-ODC circuit
diagram.
Chapter 4 SSR Series Modules
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Chapter 4 SSR Series Modules
+
VDC
–
+
DC Control
–
Load
Load
1
Voltage
Spike
Protection
2
Driver
Circuit
Rx
3
4
Figure 4-4. SSR-ODC DC Output Diagram
You can insert and use the SSR-ODC-5 in any of the eight SSR sockets
inside the SC-2311.
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Specifications
All specifications are typical at 25 °C unless otherwise specified.
SC-2311
Analog Inputs
Number of channels ............................... Eight 5B Series modules (NRSE)
Input characteristics ............................... See Appendix B, 5B Series
A
inputs
or
Eight unconditioned differential
inputs
or
16 unconditioned single-ended
inputs
Module Data Sheets
Digital I/O
Number of channels ............................... 8 SSR Series modules or
8 unconditioned DIO lines
I/O characteristics .................................. See the SSR Series section
in this appendix
Physical
Dimensions............................................. 30.7 by 25.4 by 8.6 cm
(12.1by10by3.4in.)
Weight
(without modules or panelettes)............. 2.0 kg
(4.3 pounds)
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Appendix A Specifications for SC-2311
Environment
Operating temperature ............................0 to 55 °C
Storage temperature................................–20 to 70 °C
Relative humidity ...................................10 to 90% noncondensing
Safety
Designed in accordance with IEC61010-01, UL 3111-1, and CAN/CSA
C22.2 No.1010.1 for electrical measuring and testing equipment.
Foruseataltitudesupto2000m
Installation Category II
Pollution Degree 2
Electromagnetic Compatibility
EMC/EMI ...............................................CE, C-Tick, and FCC Part 15
(Class A) Compliant
Electrical emissions ................................EN 55011 Class A at 10 m
FCC Part 15A above 1 GHz
Electrical immunity ................................Evaluated to EN 61326-1:1997
A1:1998, Table 1
Safety ......................................................EN 61010-1
Note
For full EMC and EMI compliance, you must operate this device with shielded
cabling. See the Declaration of Conformity (DoC) for this product for any additional
regulatory compliance information. To obtain the DoC for this product, click
Declaration of Conformity at
the DoCs by product family. Select the appropriate product family, followed by your
product, and a link to the DoC (in Adobe Acrobat format) appears. Click the Acrobat icon
to download or read the DoC. In addition, you cannot use BNC panelettes for full
CE compliance.
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SSR Series
Input/Output Modules
Logic levels ............................................ 0 to 5 V
Input-to-output capacitance.................... 8 pF max
Operating temperature............................ 0 to 55 °C
Storage temperature ............................... –20 to 70 °C
Maximum working voltage....................300 V Category II
SSR Series input module characteristics
Nominal input 5 VDC 120 VAC 240 VAC
Voltage range 3–32 VDC 90–140 VAC 180–280 VAC
Voltage level
Appendix A Specifications for SSR Series
Characteristic SSR-IDC-5 SSR-IAC-5 SSR-IAC-5A
ON state, min
OFF state, min
3 VDC
1 VDC
90 VAC
25 VAC
180 VAC
50 VAC
Supply current 10 mA 10 mA 10 mA
Input impedance 1.8 kΩ 22 kΩ 60 kΩ
Delay time
Turn-on, max
Turn-off, max
© National Instruments Corporation A-3 SC-2311 User Manual
0.20 mS
0.40 mS
20 mS
20 mS
20 mS
20 mS
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Appendix A Specifications for SSR Series
SSR Series output module characteristics
Characteristic SSR-ODC-5 SSR-OAC-5 SSR-OAC-5A
Voltage range 3–60 VDC 24–140 VAC 24–280 VAC
Voltage drop 0.9 V at 3.25 A 1.2 V at 2.0 A 1.2Vat2.0A
5B Series
Current rating
(one module
populated)
Current rating
(four modules
populated)
Current rating
(eight modules
populated)
3.25 A at 25 °C
2.8 A at 40 °C
2.25 A at 55 °C
2.75 A at 25 °C
2.35 A at 40 °C
2.0 A at 55 °C
2.1 A at 25 °C
1.75 A at 40 °C
0.8 A at 55 °C
2.0 A at 25 °C
1.6 A at 40 °C
1.1 A at 55 °C
1.7 A at 25 °C
1.3 A at 40 °C
0.9 A at 55 °C
1.2 A at 25 °C
0.8 A at 40 °C
0.6 A at 55 °C
2.0 A at 25 °C
1.6 A at 40 °C
1.1 A at 55 °C
1.7 A at 25 °C
1.3 A at 40 °C
0.9 A at 55 °C
1.2 A at 25 °C
0.8 A at 40 °C
0.6 A at 55 °C
Supply current 10 mA 10 mA 10 mA
Leakage
1.5 mA 2.0 mA 4.0 mA
current, max
Delay time
Turn-on, max
Turn-off, max
0.20 µS
0.40 µS
8.33 mS
8.33 mS
8.33 mS
8.33 mS
For 5B Series modules specifications, see Appendix B, 5B Series Module
Data Sheets.
Maximum working voltage ....................300 V Category II
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5B Series Module Data Sheets
B
This appendix contains the manufacturing data sheets of Analog Devices
Corporation
The Analog Devices 5B Series modules data sheets included are the
following:
• 5B30
• 5B31
• 5B32
• 5B34
• 5B35
• 5B36
• 5B37
• 5B38
• 5B40
• 5B41
• 5B42
• 5B45
• 5B46
• 5B47
1
.
1
Copyright Analog Devices, Inc. 1995-2000. Reprinted with permission of the copyright owner. All rights reserved. Analog
Devices, Inc. from Analog Devices Web Site www.analog.com.
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Appendix B 5B Series Module Data Sheets
5B30/5B31 Millivolt and Voltage Input
Functional Description
The 5B30 and 5B31 are single-channel
signal conditioning modules that amplify,
protect, filter and isolate analog input
voltages.
The 5B30 and 5B31 protect the computer
side from damage due to field-side
overvoltage faults. All models withstand
240 V rms at their input terminals without
damage thereby shielding computer-side
circuitry from field-side overvoltage
conditions. In addition, 5B30 and 5B31
Series modules are mix-and-match and hot swappable, so can be inserted or removed from
any socket in the same backplane without disrupting system power.
Inside 5B30/5B31 Modules
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier
input, a stable, laser-trimmed zero-scale input voltage is subtracted from the input signal to
set the zero-scale value. For user convenience, the zero can be optionally factory-set to
meet custom needs. This allows suppression of a zero-scale input value many times larger
Internal multi-pole lowpass filtering with a four-Hz cutoff (-3dB) enhances normal-mode
(noise on signal) and common-mode (noise on signal return) rejection at 50/60 Hz, enabling
accurate measurement of small signals in high electrical noise.
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for any input grounding. A demodulator on the computer side
of the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. The output common must be kept within
±3 V of power common.
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. The enable input should be grounded
to power common if the output need not be switched.
Input Ranges
5B30 mV Input:
±10 to ±100 mV
(±5 to ±500 mV - custom)
5B31 V Input:
±1 to ±20 V
(±0.5 to ±20 V - custom)
Output Ranges
5B30/5B31:
-5Vto+5Vor0to+5V
Figure 1. 5B30 and 5B31 Functional Block Diagram
Figure 2. 5B30 and 5B31 Input Field Connections
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Appendix B 5B Series Module Data Sheets
5B30 and 5B31 Specifications
Description Model 5B30 Model 5B31
Input Ranges
Standard Ranges ±10 mV to ±100 mV ±1Vto±20V
Custom Ranges ±5 mV to ±500 mV ±0.5 V to ±20 V
4
Output Ranges (RL>50k )
-5Vto+5Vor0Vto+5V *
Accuracy
Initial @ +25˚C ±0.05% Span ±10 µV RTI ±0.05%
2
±0.05% Span ±0.2 mV RTI
(Vz
1
)
±0.05% (Vz
1
)
Nonlinearity ±0.02% Span *
Input Offset vs. Temperature ±1 µV/˚C ±20 µV/˚C
Output Offset vs. Temperature ±20 µV/˚C *
Gain vs. Temperature ±25 ppm of Reading/˚C ±50 ppm of Reading/˚C
Input Bias Current
±3 nA ±0.2 nA
Input Resistance
Power On
Power Off
Overload
5M 650 k
40 k 650 k
40 k 650 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.2 µV rms 2µVrms
Output, 100 kHz Bandwidth 200 µV rms *
Bandwidth, -3 dB
Output Rise Time, 10% to 90%
4Hz *
200 ms *
Span
Common-Mode Voltage (CMV)
3
Input-to-Output, Continuous 1500 V rms maximum *
Output-to-Power, Continuous ±3 V maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Common-Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
160 dB (all ranges) 160 dB (span < ±2 V)
150 dB (span = ±10 V)
Normal Mode Rejection, 50/60
60 dB *
Hz
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Appendix B 5B Series Module Data Sheets
Input Protection
Continuous 240 V rms maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Output Resistance
4
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground *
6µs@C
= 0 to 2,000 pF *
load
Output Enable Control
Max Logic "0" +1 V *
Min Logic "1" +2.5 V *
Max Logic "1" +36 V *
Input Current "0" 0.4 mA *
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
+5 V ±5% *
30 mA *
±2 µV/Vs% ±0.4 mV/Vs%
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
*
*
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚C *
Operating -40˚Cto+85˚C *
Storage
Relative Humidity
RFI Susceptibility
-40˚Cto+85˚C *
0to93%@+40˚C noncondensing *
±0.5% Span error @ 400 MHz, 5
*
Watt, 3 ft
* Specifications same as model 5B30.
1
Vz is the nominal input voltage that results ina0Voutput.
2
Includes the combined effects of repeatability, hysteresis, and
L
nonlinearity and assumes R
3
The output common must be kept within ±3 V of power common.
4
Loads heavier than 50 k will degrade nonlinearity and gain
>50k .
temperature coefficient.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc. All rights reserved.
© National Instruments Corporation B-5 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
5B32 Isolated Current Input
Functional Description
The 5B32 is a single-channel signal conditioning module
that amplifies, protects, filters and isolates its analog input.
The module measures a process-current input signal of
4-20 mA or 0-20 mA by reading the voltage across an
external precision 20 resistor (supplied) and generating
an output of 0 to +5 V. Extra current conversion resistors
are available as accessories (See Model AC1362
Accessories section).
Note that the 5B32 module circuitry can withstand 240 V
rms at the input screw-terminals, thereby shielding
computer-side circuitry from field-side overvoltage
conditions. In addition, all 5B32 Series modules are mix-and-match and hot swappable, so
can be inserted or removed from any socket in the same backplane without powering down
the system.
Inside the 5B32 Series Module
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier
input, a stable, laser-trimmed zero-scale input offset is subtracted from the input signal to
set the zero-scale value for the 4-20 mA range. For user convenience, the zero can be
optionally factory-set to meet custom needs. This allows suppression of a zero-scale input
value many times larger than the total span for precise expanded-scale measurements.
in the
Internal multi-pole lowpass filtering with a four-Hz cutoff (-3dB) enhances normal-mode
(noise on signal) and common-mode (noise on signal return) rejection at 50/60 Hz, enabling
accurate measurement of small signals in high electrical noise.
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for input grounding. A demodulator on the computer side of
the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. The output common must be kept within
±3 Vdc of power common.
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. If the switch is to be on at all times,
the enable-input should be grounded to power common as it is on the 5B01 and 5B08
backplanes
.
Figure 1. 5B32 Functional Block Diagram
Input Ranges
4mAto20mA
Output Ranges
0to+5V
(-5 V to +5 V - custom)
Figure 2. 5B32 Input Field Connections
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Appendix B 5B Series Module Data Sheets
5B32 Specifications
Description Model 5B32
Input Ranges
Standard Ranges 0mAto20mAor4mAto20mA
Custom Ranges 0 mA to 20 mA (refer to ordering section)
Output Ranges (RL>50k )
4
-5Vto+5Vor0Vto+5V
Accuracy
Initial @ +25˚C
2
±0.05% Span ±0.05% Iz
1
Nonlinearity ±0.02% Span
Input Offset vs. Temperature ±0.0025 of Iz/˚C
Output Offset vs. Temperature ±20 µV/˚C
Gain vs. Temperature ±0.0025% of Reading/˚C
Input Resistor
Value
5
20.0
Accuracy ±0.1%
Stability vs. Temperature ±0.001%/˚C
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 10 nA rms
Output, 100 kHz Bandwidth 200 µV rms
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
Common-Mode Voltage (CMV)
3
4Hz
200 ms
Input-to-Output, Continuous 1500 V rms maximum
Output-to-Power, Continuous ±3 V maximum
Transient ANSI/IEEE C37.90.1-1989
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection 50/60 Hz
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160 dB
60 dB
Appendix B 5B Series Module Data Sheets
Input Protection
Continuous 240 V rms maximum
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
4
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground
6µs@C
= 0 to 2,000 pF
load
Output Enable Control
Max Logic "0" +1 V
Min Logic "1" +2.5 V
Max Logic "1" +36 V
Input Current "0" 0.4 mA
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
+5 V ±5%
30 mA
±2 µV/Vs%
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚C
Operating -40˚Cto+85˚C
Storage -40˚Cto+85˚C
Relative Humidity 0to93%@+40˚C noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
1
Iz is the nominal input current that results ina0Voutput.
2
Includes the combined effects of repeatability, hysteresis, and nonlinearity and assumes RL>50k .
Does not include current-to-voltage input resistor (AC1362
3
The output common must be kept within ±3 V of power
) error.
common.
4
Loads heavier than 50 k will degrade nonlinearity and gain temperature coefficient.
5
The current-to-voltage conversion resistor (AC1362) is supplied as a plug-in component for mounting
external to the module. All backplanes and mounting cards
provide pin sockets for mounting the
AC1362 resistor.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc. All rights reserved.
© National Instruments Corporation B-9 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
5B34 Isolated, Linearized RTD Input
Functional Description
The 5B34 is a single-channel signal conditioning module
that amplifies,protects, filters, linearizes and isolates a
wide variety of two- and three-wire RTDs. For true
four-wire RTD measurements please refer to the 5B35
section.
The 5B34 protects the computer side from damage due to
field-side overvoltage faults. The module withstands 240
V rms at the input terminals without damage thereby
shielding the internal computer-side circuitry from
field-side overvoltage conditions. In addition, the 5B34 is
mix-and-match and hot swappable with all other 5B Series
input modules, so can be inserted or removed from any socket in the same backplane
without disrupting system power.
Inside the 5B32 Series Module
Two identical sources provide excitation current for the RTD. For three-wire RTDs, the
second current flows through the third RTD lead so as to cancel the effects of (equal) lead
resistance; this current also flows through a stable resistor laser-trimmed to the RTD value
that sets the differential amplifier input and (module) output to zero volts at that scale point.
The current sources and the amplifier input are protected to withstand input overvoltage up
to 240 V rms.
A differential chopper-stabilized input amplifier provides stable gain and exceptionally low
drift. This allows the use of very low RTD excitation current to minimize self-heating and
preserve measurement accuracy. Along with module gain and zero settings, a feedback
linearizer is laser-trimmed. Custom versions of 5B34 can be laser-trimmed to meet special
requirements.
Internal multi-pole lowpass filtering with a four-Hz cutoff (-3dB)enhances normal-mode
(noise on signal) and common-mode (noise on signal return) rejection at 50/60 Hz, enabling
accurate measurement of small signals in high electrical noise.
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for any input grounding. A demodulator on the computer side
of the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. The output common must be kept within
±3 V of power common.
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. If the switch is to be on at all times,
the enable-input should be grounded to power common as it is on the 5B01 and 5B08
backplanes
.
Figure 1. 5B34 Functional Block Diagram
Input Types
100 Platinum RTD
10 Copper RTD
120 Nickel RTD
Output Range
0to+5V
Figure 2. 5B34 Input Field Connections
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Appendix B 5B Series Module Data Sheets
5B34 Specifications
(typical @ +25˚C and Vs=+5Vdc)
Description Model 5B34
Input Ranges
Standard Ranges Refer to Model Table
Custom Ranges
Output Range (RL>50k )
-200˚C to +850˚C (100 Platinum)
-80˚C to +320˚C (120 Nickel)
-100˚C to +260˚C (10 Copper)
0Vto+5V
Accuracy
Initial @ +25˚C
Conformity Error
2
±0.05% Span ±0.04 * ±0.05 (Rz1)
3
±0.05% Span
Input Offset vs. Temperature ±0.02˚C/˚C
Output Offset vs. Temperature ±20 µV/˚C
Gain vs. Temperature ±0.005% of Reading/˚C
Input Bias Current
±3 nA
Input Resistance
Power On
Power Off
Overload
5M
40 k
40 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.2 µV rms
Output, 100 kHz Bandwidth 200 µV rms
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
4Hz
200 ms
Common-Mode Voltage (CMV)
Input-to-Output, Continuous 1500 V rms, maximum
Output-to-Power, Continuous
4
±3 V, maximum
Transient ANSI/IEEE C37.90.1-1989
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection 50/60 Hz
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160 dB
60 dB
Appendix B 5B Series Module Data Sheets
Sensor Excitation Current
100 Pt, 120 Ni
10 Cu
0.25 mA
1.0 mA
Lead Resistance Effect
100 Pt, 120 Ni ±0.02˚C/
10 Cu ±0.2˚C/
Input Protection
Continuous 240 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground
6µs@C
= 0 to 2,000 pF
load
Output Enable Control
Max Logic "0" +1 V
Min Logic "1" +2.5 V
Max Logic "1" +36 V
Input Current "0" 0.4 mA
Power Supply Voltage
Power Supply Current
+5 V ±5%
30 mA
Power Supply Sensitivity, RTI
100 Pt, 120 Ni
10 Cu
Mechanical Dimensions
±0.05˚C/V
±0.5˚C/V
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
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Appendix B 5B Series Module Data Sheets
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚C
Operating -40˚Cto+85˚C
Storage -40˚Cto+85˚C
Relative Humidity 0to93%@+40˚C noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
* ±0.025 For Cu RTD's; ±0.1 For Ni RTD's.
1
Rz is the value of the RTD resistance at the lowest point of the measurement range.
2
Includes the combined effects of repeatability, hysteresis,
and conformity error. Loads heavier than 50 k will degrade conformity and gain temperature
coefficient.
3
For Pt RTD's only; other types may vary.
4
The output common must be kept within ±3 V of power
common.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc.
All rights reserved.
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Appendix B 5B Series Module Data Sheets
5B35 Isolated, Linearized 4-Wire RTD Input
Functional Description
The 5B35 is a single-channel signal conditioning module
that amplifies, filters, isolates and protects a wide variety
of four-wire RTDs. The module provides a linearized,
highly accurate output of 0 to +5V.
Accurate and Stable Performance
The four-wire configuration of the 5B35 supplies RTD
excitation from a precision, protected current source: two
RTD wires carry the excitation current and two wires serve
as signal-input leads that measure the voltage across the
RTD. Because no excitation current flows through the
signal-input leads, the length or resistance of the leads
creates little or no RTD measurement error. A low-drift chopper-stabilized differential
amplifier allows use of very low excitation current to minimize error due to RTD
self-heating. The amplifiers low input offset drift of ±0.01˚C/˚C and gain drift of ±30
ppm/˚C assure accuracy over the full operating temperature range.
True Three-Port Isolation
The floating, differential input circuit on the field side eliminates the need for any input
grounding. Signal and power isolation by transformer coupling uses a proprietary
modulation technique for linear, stable and reliable performance. A demodulator on the
computer side of the signal transformer recovers the original signal, which is then filtered
and buffered to provide a low-noise, low-impedance output signal. True three-port isolation
(Input-Output-Power) includes common-mode ratings of : 1500 V rms between input and
output and input and power; 250 V rms between power and output - no return path is
required between the power and signal output commons.
Filtering and Protection
An optimized five-pole Butterworth filter (with a 4-Hz bandwidth) provides 116 dB of
normal-mode rejection (noise on signal) at 60 Hz and 108 dB at 50 Hz. Output noise is an
exceptionally low 0.3 mV p-p in a 100 kHz bandwidth and 6 mV p-p ina5MHz
bandwidth.
The 5B35 protects the computer side from damage due to field-side overvoltage faults. The
module withstands 240 V rms at the input terminals without damage, thereby shielding the
internal computer-side circuitry from field-side overvoltage conditions. In addition, the
5B35 is mix-and-match and hot swappable with all other 5B Series modules, so can be
inserted or removed from any socket in the same backplane
without disrupting system
power.
© National Instruments Corporation B-15 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. If the switch is to be on at all times,
the enable-input should be connected to output common.
Input Types
100 Platinum RTD
10 Copper RTD
120 Nickel RTD
Output Range
0to+5V
Figure 1. 5B35 Functional Block Diagram
Figure 2. 5B35 Input Field Connections
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5B35 Specifications
(typical @ +25˚C and Vs=+5Vdc)
Description Model 5B35
Input Ranges
Standard Ranges Refer to Model Table
Custom Ranges
Output Range (RL>50k )
-200˚C to +850˚ C (100 Platinum, = 0.00385)
-80˚C to +320˚ C (120 Nickel, = 0.00672)
-100˚C to +260˚ C (10 Copper, = 0.004274)
0Vto+5V
Appendix B 5B Series Module Data Sheets
Accuracy
1
Initial @ +25˚C Refer to Model Table
Conformity Error ±0.05% Span
Input Offset vs. Temperature ±0.01˚C/˚ C
Output Offset vs. Temperature ±20 µV/˚C
Gain vs. Temperature ±0.003% of Reading/˚C
Input Resistance
Power On
Power Off
Overload
> 1000 M
200 k
200 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.2 µV rms
Output, 100 kHz Bandwidth 100 µV rms (0.3 mV peak-peak)
Output, 1 MHz Bandwidth 1.5 mV peak-peak
Output, 5 MHz Bandwidth 6 mV peak-peak
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
4Hz
100 ms
Common-Mode Voltage (CMV)
Input-to-Output, Continuous 1500 V rms, maximum
Input-to-Power, Continuous 1500 V rms, maximum
Output-to-Power, Continuous
2
250 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
© National Instruments Corporation B-17 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection (NMR)
190 dB (180 dB, Model 5B35-04)
116 dB @ 60 Hz; 108 dB @ 50 Hz
Sensor Excitation Current
100 Pt, 120 Ni
10 Cu
0.25 mA
1.0 mA
Lead Resistance Effect
100 Pt, 120 Ni ±0.00001˚C/
10 Cu ±0.0001˚C/
Input Protection
Continuous 240 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
Voltage Output Protection
25
Continuous Short to Ground
Output Current Limit ±9 mA
Output Selection Time
6µsto±1mVofV
out@Cload
= 0 to 2,000 pF
Output Enable Control
2
Max Logic "0" +0.8 V
Min Logic "1" +2.4 V
Max Logic "1" +100 V
Input Current "0", "1" 0.5 µA
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
+5Vdc±5%
15 mA
±0.2˚C/% of V
s
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
SC-2311 User Manual B-18 ni.com
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Appendix B 5B Series Module Data Sheets
Environmental
Temperature Range
Rated Performance -40˚Cto+85˚C
Operating -40˚Cto+85˚C
Storage -40˚ Cto+85˚C
Relative Humidity 0to93%@+40˚C noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
1
Includes the combined effects of repeatability, hysteresis, and conformity error. Loads heavier than 50
k will degrade conformity and gain temperature coefficient.
2
The user's board layout must separate Power Common from Output Common. When the output
switch is not used, connect the Enable Input to the Output Common. Output Common is connected to
power common when the 5B35 is installed on a 5B Series backplane
.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc.
All rights reserved.
© National Instruments Corporation B-19 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
5B36 Isolated, Potentiometer Input
Functional Description
The 5B36 is a single-channel signal conditioning module
that amplifies, filters, and buffers a wide variety of
three-wire potentiometers and two-wire rheostats
(slidewires). The module provides an accurately scaled,
low-noise low-impedance output of 0 to +5 V.
Accurate and Stable Performance
The 5B36 supplies protected potentiometer/slidewire
excitation from a pair of closely matched precision current
sources designed to cancel errors due to lead resistances.
A low-drift chopper-stabilized differential amplifier
allows use of a very low excitation current to minimize error due to potentiometer
self-heating. The amplifiers low input offset drift (±0.004
30 ppm/˚C assure accuracy over the full operating temperature range.
True Three-Port Isolation
The floating, differential input circuit on the field side eliminates the need for any input
grounding. Signal and power isolation by transformer coupling uses a proprietary
modulation technique for linear, stable and reliable performance. A demodulator on the
computer side of the signal transformer recovers the original signal, which is then filtered
and buffered to provide a low-noise, low-impedance output signal. True three-port isolation
(Input-Output-Power) includes common-mode ratings of : 1500 V rms between
input-output and input-power; 250 V rms between power and output - no return path is
required between the power and signal output commons.
/˚C) and gain drift of
Filtering and Protection
An optimized five-pole Butterworth filter (with a 4-Hz bandwidth) provides 116 dB of
normal-mode rejection (noise on signal) at 60 Hz and 108 dB at 50 Hz. Output noise is an
exceptionally low 0.3 mV pk-pk in a 100 kHz bandwidth and 6 mV pk-pk ina5MHz
bandwidth.
The 5B36 protects the computer side from damage due to field-side overvoltage faults. The
module withstands 240 V rms at the input terminals without damage, thereby shielding the
internal computer-side circuitry from field-side overvoltage conditions. In addition, the
5B36 is mix-and-match and hot swappable with all other 5B Series modules, so can be
inserted or removed from any socket in the same backplane without disrupting system
power.
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. If the switch is to be on at all times,
the enable-input should be grounded to output common as it is on the 5B01 and 5B08
backplanes
.
Figure 1. 5B36 Functional Block Diagram
Input Types
Potentiometers/
Slidewires to
10k
Output Range
0to+5V
© National Instruments Corporation B-21 SC-2311 User Manual
Figure 2. 5B36 Input Field Connections
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Appendix B 5B Series Module Data Sheets
5B36 Specifications
(typical @ +25˚C and Vs=+5Vdc)
Description Model 5B36
Input Ranges
Standard Ranges
Custom Ranges
Output Range (RL>50k )
Accuracy
1
Initial @ +25˚C ±0.08% Span
Input Offset vs. Temperature
100 , 500 , 1 k Sensors ±0.004 /˚C
10 k Sensor ±0.01 /˚C
Output Offset vs. Temperature ±20 µV/˚C
Gain vs. Temperature ±0.003% of Reading/˚C
Input Resistance
Power On
Power Off
Overload
0 to 10 k (Refer to Model Table)
0 to 10 k (Refer to Ordering Section)
0Vto+5V
> 1000 M
200 k
200 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.2 µV rms
Output, 100 kHz Bandwidth 100 µV rms (0.3 mV peak-peak)
Output, 1 MHz Bandwidth 1.5 mV peak-peak
Output, 5 MHz Bandwidth 6 mV peak-peak
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
SC-2311 User Manual B-22 ni.com
4Hz
100 ms
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Appendix B 5B Series Module Data Sheets
Common-Mode Voltage (CMV)
Input-to-Output, Continuous 1500 V rms, maximum
Input-to-Power, Continuous 1500 V rms, maximum
Output-to-Power, Continuous
2
250 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection (NMR)
170 dB
116 dB @ 60 Hz; 108 dB @ 50 Hz
Sensor Excitation Current
100 , 500 , 1 k Sensors
10 k Sensor
0.25 mA
0.1 mA
Lead Resistance Effect
100 , 500 , 1 k Sensors ±0.005 /
10 k Sensor ±0.01 /
Input Protection
Continuous 240 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
Voltage Output Protection
25
Continuous Short to Ground
Output Current Limit ±9 mA
Output Selection Time
Output Enable Control
6µsto±1mVofV
2
out@Cload
= 0 to 2,000 pF
Max Logic "0" +0.8 V
Min Logic "1" +2.4 V
Max Logic "1" +100 V
Input Current "0", "1" 0.5 µA
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
+5Vdc±5%
15 mA
±2 µV/% of V
s
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
© National Instruments Corporation B-23 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
Environmental
Temperature Range
Rated Performance -40˚Cto+85˚C
Operating -40˚Cto+85˚C
Storage -40˚Cto+85˚C
Relative Humidity 0to93%@+40˚C noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
* ±0.025 For Cu RTD's; ±0.1 For Ni RTD's.
1
Includes the combined effects of repeatability, hysteresis, and nonlinearity error. Loads heavier than
50 k will degrade nonlinearity and gain temperature coefficient.
2
The user's board layout must separate Power Common from Output Common. When the output
switch is not used, connect the Enable Input to the Output Common. Output Common is connected to
power common when the 5B36 is installed on a 5B Series backplane
.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc. All rights reserved.
SC-2311 User Manual B-24 ni.com
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Appendix B 5B Series Module Data Sheets
5B37 Isolated Thermocouple Input
Functional Description
The 5B37 is a single-channel signal conditioning module
that interfaces, amplifies and filters J, K, T, E, R, S, N,
and C-type thermocouple and provides an isolated and
protected precision output of 0 to +5 V.
Accurate and System-Ready
Internal cold-junction compensation largely corrects errors
arising from parasitic thermocouples formed by
thermocouple connection to the input screw terminals,
providing an accuracy of ±0.25˚C @ +25˚C ambient
temperature. The module generates a predictable upscale
signal to indicate an open thermocouple; for a downscale
response, connect a 47 M , 0.25 W resistor across screw terminals 1 and 3.
The 5B37 protects the computer side from damage due to field-side overvoltage faults. All
models withstand 240 V rms at their input terminals without damage, thereby shielding
computer-side circuitry from field-side overvoltage conditions. Further, the 5B37 is
mix-and-match and hot-swappable with other 5B Series modules, so can be inserted or
removed from any socket in the same backplane without disrupting system power.
Inside the 5B37 Module
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier
input, a stable, laser-trimmed zero-scale input voltage is subtracted from the input signal to
set the zero-scale value. For user convenience, the zero can be optionally factory-set to
meet custom needs. This allows suppression of a zero-scale input value many times larger
Internal multi-pole lowpass filtering with a four-Hz cutoff (-3 dB) provides 60 dB of
normal-mode rejection (noise on signal) and enhancement of common-mode rejection
(noise on signal return) at 60 Hz, enabling accurate measurement of small signals in high
electrical noise.
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for any input grounding. A demodulator on the computer side
of the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. The output common must be kept within
3 V of power common.
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. The enable input should be grounded
to power common if the output need not be switched, as on the 5B01 and 5B08 backplanes
.
Figure 1. 5B37 Functional Block Diagram
Input Types
Thermocouple Types :
J, K, T, E, R, S, B, N, C
Output Range
0to+5V
(-5 V to +5 V - custom)
SC-2311 User Manual B-26 ni.com
Figure 2. 5B37 Input Field Connections
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5B37 Specifications
(typical @ +25˚C and Vs=+5Vdc)
Description Model 5B37
Input Ranges
Standard Ranges Refer to Model Table
Custom Ranges ±5 mV to ±500 mV
Output Range (RL>50k )
4
-5Vto+5Vor0to+5V
Appendix B 5B Series Module Data Sheets
Accuracy
Initial @ +25˚C
2
±0.05% Span ±10 µV RTI ±0.05% of Vz1+CJC Sensor
Error
Nonlinearity ±0.02% Span
Input Offset vs. Temperature ±1 µV/˚ C
Output Offset vs. Temperature ±20 µV/˚ C
Gain vs. Temperature ±0.0025% of Reading/˚C
Cold Junction Compensation
Initial Accuracy @ +25˚C
3
±0.25˚C (±0.75˚ C, maximum)
Accuracy, +5˚Cto+45˚C ±0.5˚C (±0.0125˚C/˚C)
Input Bias Current
-25 nA
Input Resistance
Power On
Power Off
Overload
5M
40 k
40 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.2 µV rms
Output, 100 kHz Bandwidth 200 µV rms
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
4Hz
200 ms
Common-Mode Voltage (CMV)
4
Input-to-Output, Continuous 1500 V rms, maximum
Output-to-Power, Continuous ±3 V, maximum
Transient ANSI/IEEE C37.90.1-1989
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Appendix B 5B Series Module Data Sheets
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection (NMR), 50/60 Hz
160 dB
60 dB
Input Protection
Continuous 240 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground
6µs@C
Output Enable Control
Max Logic "0" +1 V
Min Logic "1" +2.5 V
Max Logic "1" +36 V
Input Current "0" 0.4 mA
Open Input Response
Open Input Response Time
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
Upscale
10 seconds
+5 V ±5%
30 mA
±2 µV/% of V
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
= 0 to 2,000 pF
load
s
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚ C
Operating -40˚Cto+85˚C
Storage -40˚Cto+85˚C
Relative Humidity 0to93%@+40˚C noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
1
Vz is the nominal input voltage that results ina0Voutput.
2
Includes the combined effects of repeatability, hysteresis, and nonlinearity and assumes RL>50k .
Loads heavier than 50 k will degrade nonlinearity and gain temperature coefficient.
3
When used with the model AC1361 CJC sensor (see Accessories section), which is provided on each
channel of 5B Series backplanes and mounting cards
4
The output common must be kept within ±3 V of power common.
.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc.
SC-2311 User Manual B-28 ni.com
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Appendix B 5B Series Module Data Sheets
5B38 Isolated, Wide-Bandwidth Strain Gage Input
Functional Description
The 5B38 is a wide-bandwidth single-channel
signal conditioning module that interfaces,
amplifies, and filters signals from full-bridge and
half-bridge strain-gage transducers between 300
and 10 k . The module provides an isolated
bridge excitation of +10 V and a protected,
isolated precision output of -5 V to +5 V. The 10
kHz bandwidth of the module ideally suits to
measure signals that vary rapidly with time, such
as strain on an automobile chassis during a crash
test.
The 5B38 protects the computer side from
damage due to field-side overvoltage faults. The
module withstands 240 V rms at its input
terminals without damage, thereby shielding computer-side circuitry from field-side
overvoltage conditions. In addition, the 5B38 is mix-and-match and hot-swappable with all
5B Series modules, so can be inserted or removed from any socket in the same backplane
without disrupting system power.
The 5B38-04 contains bridge completion circuitry, so can function with half-bridge strain
gages. For quarter-bridge requirements, the user must complete the bridge input to the
half-bridge level externally. The factory can configure the module for a wide range of input
ranges (sensitivities).
Inside the 5B38 Module
A single-pole anti-aliasing filter resides at each modules input. A three-pole, low-pass filter
in the output stage sets the bandwidth and yields optimal noise performance for accurate
measurement of small signals in high electrical noise. A chopper-stabilized input amplifier
provides low drift and stable gain.
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for any input grounding. A demodulator on the computer side
of the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. An additional benefit, the output section
acts as a third floating port, eliminating possible problems from ground loops and
power-supply noise. The output common must be kept within ±3 V of power common.
© National Instruments Corporation B-29 SC-2311 User Manual
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. The enable input should be grounded
to power common if the output need not be switched, as on the 5B01 and 5B08 backplanes
Figure 1. 5B38 Functional Block Diagram
.
Figure 2. 5B38 Input Field Connections
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Appendix B 5B Series Module Data Sheets
Input Type
Strain Gage: Full-Bridge/Half-Bridge
Output Ranges
-5Vto+5V
5B38 Specifications
Description Model 5B38 Full Bridge Model 5B38 Half Bridge
Input Ranges
Standard Ranges ±20 mV (2 mV/V Sensitivity)
Custom Ranges ±10 mV to ±500 mV *
Output Ranges (RL>50k )
Accuracy
Initial @ +25˚C ±0.08% Span ±10 µV RTI ±0.08% Span ±1 mV RTI
Nonlinearity ±0.02% Span *
Input Offset vs. Temperature ±1 µV/˚C *
Output Offset vs. Temperature ±40 µV/˚C *
Gain vs. Temperature ±25 ppm of Reading/˚C *
2
±30 mV (3 mV/V Sensitivity)
-5Vto+5V *
±30 mV (3 mV/V
Sensitivity)
Excitation Voltage Output @ full
load
Load Range
Load Regulation ±5 ppm/mA *
vs. Temperature ±15 ppm/˚C *
Half Bridge Voltage Level N/A +5V±1mV
Half Bridge Voltage vs. Temperature N/A ±15 ppm/˚C
Input Bias Current
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+10V±3mV *
10 k , minimum; 300 ,
maximum
±3 nA *
*
Appendix B 5B Series Module Data Sheets
Input Resistance
Power On
Power Off
Overload
20 M , minimum
40 k , minimum
40 k , minimum
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.4 µV rms 2µVrms
Input, 10 kHz Bandwidth
±70 nV/ Hz ±250 nV/ Hz
Output, 100 kHz Bandwidth 10 mV peak-peak *
Bandwidth, -3 dB
Output Rise Time, 10% to 90%
10 kHz *
40 µs *
Span
Output Settling Time, to 0.1%
250 µs 7ms
Common-Mode Voltage (CMV)
Input-to-Output, Continuous 1500 V rms, maximum *
Output-to-Power, Continuous
2
±3 V, maximum *
Transient ANSI/IEEE C37.90.1-1989 *
*
*
*
Common-Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection, 50/60 Hz
100 dB *
-3 dB @ 10 kHz *
Input Protection, Signal and Excitation Voltage
Continuous 240 V rms maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Output Resistance
Voltage Output Protection
Output Selection Time
SC-2311 User Manual B-32 ni.com
50
Continuous Short to Ground *
6µs@C
= 0 to 2,000 pF *
load
*
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Appendix B 5B Series Module Data Sheets
Output Enable Control
Max Logic "0" +1 V *
Min Logic "1" +2.5 V *
Max Logic "1" +36 V *
Input Current "0" 0.4 mA *
Power Supply Voltage
Power Supply Current
+5 V ±5% *
200 mA, Full Load; 120 mA, No
Load
Power Supply Sensitivity
Mechanical Dimensions
25 ppm reading/% ±2.5µV RTI/% *
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚C *
Operating -40˚Cto+85˚C *
Storage
Relative Humidity
RFI Susceptibility
-40˚Cto+85˚C *
0to93%@+40˚C noncondensing *
±0.5% Span error @ 400 MHz, 5
Watt, 3 ft
*
*
*
* Same as full-bridge version.
1
Includes the combined effects of repeatability, hysteresis, and nonlinearity. Loads heavier than
50 k will degrade nonlinearity and gain temperature coefficient.
2
The output common must be kept within ±3 V of power common.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc.
© National Instruments Corporation B-33 SC-2311 User Manual
All rights reserved.
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Appendix B 5B Series Module Data Sheets
5B40/5B41 Isolated, Wide Bandwidth Millivolt and
Voltage Input
Functional Description
The 5B40 and 5B41 are wide-bandwidth
single-channel signal conditioning modules that
amplify, protect, filter and isolate analog input
voltages. Both modules provide a 10 kHz
bandwidth which ideally suits them to measuring
signals that vary rapidly with time. Examples
include pressure inside a plastic injection molding
machine, strain on an automobile chassis during a
crash test and vibrations on a machine bearing
shortly before failure.
The 5B40 and 5B41 protect the computer side from damage due to field-side overvoltage
faults. All models withstand 240 V rms at their input terminals without damage thereby
shielding computer-side circuitry from field-side overvoltage conditions. In addition, 5B40
and 5B41 Series modules are mix-and-match and hot swappable, so can be inserted or
removed from any socket in the same backplane
without disrupting system power.
Inside 5B40/5B41 Modules
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier
input, a stable, laser-trimmed zero-scale input voltage is subtracted from the input signal to
set the zero-scale value. For user convenience, the zero can be optionally factory-set to meet
custom needs. This allows suppression of a zero-scale input value many times larger than
the total span for precise expanded-scale measurements.
A single-pole anti-aliasing filter resides at each modules input. A three-pole, low-pass filter
in the output stage sets the bandwidth and yields optimal noise performance for accurate
measurement of small signals in high electrical noise.
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for any input grounding. A demodulator on the computer side
of the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. The output common must be kept within
3 Vdc of power common.
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Appendix B 5B Series Module Data Sheets
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. The enable input should be grounded
to power common if the output need not be switched.
Figure 1. 5B40 and 5B41 Functional Block Diagram
Input Ranges
5B40 mV Input:
±10 mV to ±100 mV
(±5 mV to ±500 mV - custom)
5B41 V Input:
±1Vto±20V
(±0.5 V to ±20 V - custom)
Figure 2. 5B40 and 5B41 Input Field Connections
Output Ranges
5B40/5B41:
-5Vto+5Vor0to+5V
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Appendix B 5B Series Module Data Sheets
5B40 and 5B41 Specifications
Description Model 5B40 Model 5B41
Input Ranges
Standard Ranges ±10 mV to ±100 mV ±1Vto±20V
Custom Ranges ±5 mV to ±500 mV ±0.5 V to ±20 V
4
Output Ranges (RL>50k )
-5Vto+5Vor0Vto+5V *
Accuracy
Initial @ +25˚C ±0.05% Span ±10 µV RTI ±0.05%
2
±0.05% Span ±0.05%
(Vz
1
)
(Vz
1
)
Nonlinearity ±0.02% Span *
Input Offset vs. Temperature ±1 µV/˚C ±20 µV/˚C
Output Offset vs. Temperature ±40 µV/˚C *
Gain vs. Temperature ±25 ppm of Reading/˚C ±50 ppm of Reading/˚C
Input Bias Current
±3 nA ±0.2 nA
Input Resistance
Power On
Power Off
Overload
200 M 650 k
40 k 650 k
40 k 650 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.4 µV rms 2µVrms
Output, 100 kHz Bandwidth 10 mV peak-peak *
Bandwidth, -3 dB
Output Rise Time, 10% to 90%
10 kHz *
35 µs *
Span
Common-Mode Voltage (CMV)
3
Input-to-Output, Continuous 1500 V rms, maximum *
Output-to-Power, Continuous ±3 V maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Common-Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection
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100 dB 90 dB
-3 dB @ 10 kHz *
Appendix B 5B Series Module Data Sheets
Input Protection
Continuous 240 V rms, maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Output Resistance
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground *
6µs@C
= 0 to 2,000 pF *
load
Output Enable Control
Max Logic "0" +1 V *
Min Logic "1" +2.5 V *
Max Logic "1" +36 V *
Input Current "0" 0.4 mA *
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
+5 V ±5% *
30 mA *
±2 µV/Vs% ±0.4 mV/Vs%
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
*
*
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚C *
Operating -40˚ Cto+85˚C *
Storage -40˚Cto+85˚ C *
Relative Humidity 0to93%@+40˚C noncondensing *
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5
*
Watt, 3 ft
* Specifications same as model 5B40.
1
Vz is the nominal input voltage that results ina0Voutput.
2
Includes the combined effects of repeatability, hysteresis, and nonlinearity and assumes RL>50k .
Loads heavier than 50 k will degrade nonlinearity and gain temperature coefficient.
3
The output common must be kept within ±3 V of power common.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc.
© National Instruments Corporation B-37 SC-2311 User Manual
All rights reserved.
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Appendix B 5B Series Module Data Sheets
5B42 Isolated, Process Current Input
Functional Description
The 5B42 is a single-channel signal conditioning module
that interfaces with two-wire transmitters, providing an
isolated, regulated 20 V supply voltage. The module filters
and amplifies the 4-to-20 mA process-current input to
produce an accurately scaled, low-noise low-impedance
output of +1 to +5 V or +2 to +10 V.
True Three-Port Isolation
The floating, differential input circuit on the field side
eliminates the need for any input grounding. Signal and
power isolation by transformer coupling uses a proprietary
modulation technique for linear, stable and reliable
performance. A demodulator on the computer side of the signal transformer recovers the
original signal, which is then filtered and buffered to provide a low-noise, low-impedance
output signal. True three-port isolation (Input-Output-Power) includes common-mode
ratings of: 1500 V rms between input and output and input and power; 250 V rms between
power and output - no return path is required between the power and signal output
commons.
Accurate and Stable Performance
The 5B42 maintains accuracy over the wide operating temperature range of -40˚Cto+85˚C
through design for low parameter drift. This enables the module to provide output offset
drift of only ±5 µV/˚C and gain drift of just ±25 ppm/˚C.
Why an Internal Current Sense Resistor
The 5B42 offers significant advantages over signal conditioners that require an external
current sense resistor. First, an external resistor is not protected from accidental connection
to a 240 V rms power line. Next, the external resistor tolerance must be added to the
conditioners specified errors. In contrast, the 5B42 is calibrated and specified with its
internal 25 sense resistor. Further, the 5B42 signal input, loop supply and the sense
resistor are all protected against accidental application of excess voltages up to 240 V rms.
Finally, there is no need to install an external sense resistor on the backplane
, but if one is
installed it will not affect 5B42 performance.
Filtering and Protection
The 5B42 contains an optimized five-pole low-pass filter with a -3 dB bandwidth at 100-Hz
that provides a low-overshoot step response and exceptionally low noise of 200 µV pk-pk
in a 100 kHz bandwidth. Attenuation (normal mode rejection) increases at a 90 dB/decade
rate beyond 100 Hz.
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Appendix B 5B Series Module Data Sheets
The module protects the computer side from damage due to field-side overvoltage faults.
The module withstands 240 V rms at the input terminals without damage, thereby shielding
the internal computer-side circuitry from field-side overvoltage conditions. In addition, the
5B42 is mix-and-match and hot-swappable with all other 5B Series modules, so can be
inserted or removed from any socket in the same backplane
without disrupting system
power.
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. If the switch is to be on at all times,
the enable-input should be grounded to output common as it is on the 5B01 and 5B08
backplanes
.
Figure 1. 5B42 Functional Block Diagram
Input Types
Two-Wire Transmitters 4 to 20 mA
(0 to 20 mA - custom)
Output Range
+1 to +5 V or +2 to +10 V
Figure 2. 5B42 Input Field Connections
(0 to +10 V - custom)
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Appendix B 5B Series Module Data Sheets
5B42 Specifications
(typical @ +25˚C and Vs=+5Vdc)
Description Model 5B42
Input Ranges
Standard Ranges 4 mA to 20 mA (Refer to Model Table)
Custom Ranges 0 mA to 20 mA (Refer to Ordering Section)
Isolated Loop Supply Voltage
Output Ranges (RL>50k )
20V@4mAto20mAInput
+1Vto+5V;+2Vto+10V
Accuracy
1
Initial @ +25˚C ±0.05% Span ±4 µA RTI
Nonlinearity ±0.01% Span
Input Offset vs. Temperature ±0.5 µV/˚ C
Output Offset vs. Temperature ±5 µV/˚C
Gain vs. Temperature ±0.0025% of Reading/˚ C
Input Sense Resistor
2
25
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 10 nA rms
Output, 100 kHz Bandwidth 200 µV peak-peak
Bandwidth, -3 dB
Output Step Rise Time, 10% to 90% Span
100 Hz
4ms
Common-Mode Voltage (CMV)
Output-to-Input, Continuous 1500 V rms, maximum
Input-to-Power, Continuous 1500 V rms, maximum
Output-to-Power, Continuous
3
250 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
Normal Mode Rejection (NMR)
140 dB
-3 dB @ 100 Hz (90 dB per decade > 100 Hz)
Input, Excitation, and Sense Resistor Protection
Continuous 240 V rms, maximum
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Appendix B 5B Series Module Data Sheets
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
Voltage Output Protection
25
Continuous Short to Ground
Output Current Limit ±20 mA
Output Selection Time
6µsto±1mVofV
out@Cload
= 0 to 2,000 pF
Output Enable Control
3
Max Logic "0" +0.8 V
Min Logic "1" +2.4 V
Max Logic "1" +36 V
Input Current "0", "1" 0.5 µA
Power Supply Voltage
+5Vdc±5%
Power Supply Current
@ Transmitter Load of 20 mA 200 mA
@ Transmitter Load of 4 mA 100 mA
Power Supply Sensitivity, RTI
Mechanical Dimensions
±1 µV/% of V
s
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Environmental
Temperature Range
Rated Performance -40˚Cto+85˚C
Operating -40˚Cto+85˚C
Storage -40˚Cto+85˚C
Relative Humidity 0to95%@+60˚ C, noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
1
Includes the combined effects of repeatability, hysteresis, and nonlinearity error. Loads heavier than
50 k will degrade nonlinearity and gain temperature coefficient.
2
A precision 25 current-sense input resistor is internal to the 5B42 - refer to block diagram.
3
The user's board layout must separate Power Common from Output Common. When the output
switch is not used, connect the Enable Input to the Output Common. Output common is connected to
power common when the 5B42 is installed on a 5B Series backplane
.
Specifications subject to change without notice.
Copyright 1995-2000 Analog Devices, Inc.
© National Instruments Corporation B-41 SC-2311 User Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
All rights reserved.
Appendix B 5B Series Module Data Sheets
5B45/5B46 Isolated, Frequency Input
Functional Description
The 5B45 and 5B46 are single-channel isolated
frequency input modules that producea0to+5V
output proportional to input frequency. Model
5B45 accepts full-scale inputs ranging from 500
Hz to 20 kHz. Model 5B46 accepts full-scale
inputs ranging from 20 kHz to 275 kHz. Both
models allow the user to set the threshold to
either 0 V (for zero crossing signals) or +1.4 V
(for positive level signals), and the hysteresis to
either ±25 mV or ±400 mV (all input types).
The 5B45 and 5B46 protect the computer side from field-side overvoltage faults. All
models withstand 240 V rms at their input terminals without damage, thereby shielding
computer-side circuitry from field-side overvoltage conditions. In addition, all 5B45 and
5B46 models are mix-and-match and hot-swappable, so can be inserted or removed from
any socket in the same backplane
Inside 5B45/5B46 Modules
The 5B45/46 internal circuitry compares the input signal to the user-selected threshold (V
and hysteresis (V
H
). Signals of virtually any wave shape that exceed the combined
threshold and hysteresis levels (V
the input frequency. The comparator output is then transmitted across a proprietary
transformer-coupled isolation barrier and converted to a high-level analog signal. This
signal is then filtered by a multi-pole low pass Butterworth filter and buffered to provide a
low-noise, low-impedance output signal that is accurately proportional to input frequency.
without disrupting system power.
T±VH
) will trigger a comparator at a rate determined by
T
)
Simple Setup and Versatile Choices
Setting the threshold and hysteresis values is a simple matter of externally wiring to the
backplane screw terminals. The threshold for measuring a zero-crossing voltage waveform
(such as sine waves) is set to 0 volts by connecting the input signal across screw-terminals
4 and 3. The threshold for a positive level signal (such as a TTL or pulse train waveform) is
set at +1.4 V by connecting the input signal across terminals 3 and 2. Hysteresis for both
input signal types is set at ±400 mV, but can be changed to ±25 mV by adding a jumper
between screw terminals 1 and 4.
Response time is a function of a modules rated input frequency range.
Convenience Features
The input circuit is fully floating and isolated from the output and power commons. In
addition, the output section acts as a third floating port towards eliminating possible
problems from ground loops and power supply noise. The output common must be held
within ±3 V of power common.
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Appendix B 5B Series Module Data Sheets
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. The enable input should be grounded
to power common if the output need not be switched as it is on the 5B01 and 5B08
backplanes
.
Figure 1. 5B45 and 5B46 Functional Block Diagram
Input Ranges
5B45: 0 to 10
kHz
(0 to 20 kHz custom)
5B46: 0 to 250
kHz
(0 to 275 kHz custom)
Output Ranges
Figure 2. 5B45 and 5B46 Input Field Connections
0Vto+5V
(-5Vto+5Vcustom)
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Appendix B 5B Series Module Data Sheets
5B45 and 5B46 Specifications
Description Model 5B45 Model 5B46
Frequency Input
Standard Ranges Refer to Model Table Refer to Model Table
Custom Ranges 500 Hz span, min.; 20 kHz span,
max.
Overrange 20% of Span *
Voltage Range 70 mV rms min. 240 V rms max. *
Waveforms Sine, Square, Triangle, Pulse Train *
Pulse Width (Pulse Train Inputs) 2 µs min. *
Threshold Options Zero Crossing or TTL (+1.4 V) *
TTL Input, Low (-40˚Cto+85˚C) 0.8 V max. *
TTL Input, High (-40˚Cto+85˚C) 2.0 V min. *
Hysteresis Options
1
Output Ranges (RL>50k )
±25 mV or ±400 mV *
-5Vto+5Vor0Vto+5V *
20 kHz span, min.; 275
kHz span, max.
Accuracy
2
Initial @ +25˚C ±0.05% Span (±0.1% Span, max.) *
Nonlinearity ±0.005% Span (±0.015% Span,
max.)
Output Offset vs. Temperature ±20 µV/˚C *
Gain vs. Temperature ±20 ppm/˚C *
Input Bias Current, Vin<5V
100 µA *
peak-peak
Input Impedance
Small Signal, Vin< 5 V peak-peak
Large Signal, Vin> 5 V peak-peak
Power Off
5M
40 k || 330 pF
40 k || 330 pF
*
*
*
*
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Appendix B 5B Series Module Data Sheets
Noise
Output, 100 kHz Bandwidth 0.7 mV peak-peak *
Output, 5 MHz Bandwidth 7 mV peak-peak *
Output Ripple 10 mV peak-peak @ (10% F
-full scale
Bandwidth, -3 dB
Output Step Response Time
+F
10 Hz 190 Hz
Refer to Model Table *
)
span
Common-Mode Voltage (CMV)
Input-to-Output, Continuous 1500 V rms, maximum *
Output-to-Power, Continuous
3
±3 V, maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Common-Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
120 dB *
Input Protection
Continuous 240 V rms, maximum *
Transient ANSI/IEEE C37.90.1-1989 *
Output Resistance
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground *
6µs@C
= 0 to 2,000 pF *
load
*
*
Output Enable Control
Max Logic "0" +1.0 V *
Min Logic "1" +2.5 V *
Max Logic "1" +36 V *
Input Current "0" 0.4 mA *
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTO
Mechanical Dimensions
+5 V ±5% *
70 mA *
±0.005% of Span/% of V
s
2.275" x 2.375" x 0.595"
*
*
(57.8 mm x 59.1 mm x 15.1 mm)
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Appendix B 5B Series Module Data Sheets
Environmental
Temperature Range
Rated Performance -40˚Cto+85˚C *
Operating Performance -40˚Cto+85˚C *
Storage -40˚Cto+85˚C *
Relative Humidity 0to93%@+40˚C noncondensing *
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5
*
Watt, 3 ft
* Specifications same as model 5B45.
1
Jumper selectable. Refer to Field Connection diagram.
2
Includes the combined effects of repeatability, hysteresis, and nonlinearity. Loads heavier than 50 k
will degrade nonlinearity and gain temperature coefficient.
3
The Output Common must be kept within ±3 V of Power Common.
Specifications subject to change without notice.
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Appendix B 5B Series Module Data Sheets
5B47 Isolated, Linearized Thermocouple Input
Functional Description
The 5B47 is a single-channel signal conditioning module
that interfaces, amplifies and filters J, K, T, E, R, S, and
B-type thermocouple. The module provides an isolated and
protected precision output of 0 to +5 V.
The 5B47 internally linearizes its input signal to provide
an output that is linear with temperature. Accuracy for
each type of sensor is specified in the 5B47 model table
(See Model 5B37
for non-linearized conditioning of
thermocouple signals.)
Accurate and System-Ready
Internal cold-junction compensation largely corrects errors arising from parasitic
thermocouples formed by thermocouple connection to the input screw terminals, providing
an accuracy of ±0.25˚C @ +25˚C ambient temperature. The module generates a predictable
upscale signal to indicate an open thermocouple; for a downscale response, connect a 20 M
, 0.25 W resistor across screw terminals 1 and 3.
.
The 5B47 protects the computer side from damage due to field-side overvoltage faults. All
models withstand 240 V rms at their input terminals without damage, thereby shielding
computer-side circuitry from field-side overvoltage conditions. Further, the 5B47 is
mix-and-match and hot-swappable with other 5B Series modules, so can be inserted or
removed from any socket in the same backplane
without disrupting system power.
Inside the 5B47 Module
A chopper-stabilized input amplifier provides low drift and stable gain. At the amplifier
input, a stable, laser-trimmed zero-scale input voltage is subtracted from the input signal to
set the zero-scale value. For user convenience, the zero can be optionally factory-set to
meet custom needs. This allows suppression of a zero-scale input value many times larger
Internal multi-pole lowpass filtering with a four-Hz cutoff (-3 dB) provides 60 dB of
normal-mode rejection (noise on signal) and enhancement of common-mode rejection
(noise on signal return) at 60 Hz, enabling accurate measurement of small signals in high
electrical noise.
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Appendix B 5B Series Module Data Sheets
Signal isolation by transformer coupling uses a proprietary modulation technique for linear,
stable and reliable performance. The differential input circuit on the field side is fully
floating, eliminating the need for any input grounding. A demodulator on the computer side
of the signal transformer recovers the original signal, which is then filtered and buffered to
provide a low-noise, low-impedance output signal. The output common must be kept within
±3 V of power common.
Convenience Features
A series output switch eliminates the need for external multiplexing in many applications.
The switch is turned on by an active-low enable input. The enable input should be grounded
to power common if the output need not be switched, as on the 5B01 and 5B08 backplanes
.
Figure 1. 5B47 Functional Block Diagram
Input Types
Thermocouple Types:
J, K, T, E, R, S, B
Output Ranges
0to+5V
Figure 2. 5B47 Input Field Connections
(+1 V to +5 V - custom)
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Appendix B 5B Series Module Data Sheets
5B47 Specifications
Description Model 5B47
Input Ranges
Standard Ranges Refer to Model Table
Custom Ranges ±5 mV to ±500 mV
Output Ranges (RL>50k )
+1Vto+5Vor0Vto+5V
Accuracy
1
Initial @ +25˚C See Model Table
Input Offset vs. Temperature
2
±1 µV/˚C
Output Offset vs. Temperature ±20 µV/˚C
Gain vs. Temperature ±0.0025% of Reading/˚C
Cold Junction Compensation
Initial Accuracy @ +25˚C
3
±0.25˚C (±0.75˚ C, maximum)
Accuracy, +5˚Cto+45˚C ±0.5˚C (±0.0125˚C/˚C)
Input Bias Current
-25 nA
Input Resistance
Power On
Power Off
Overload
5M
40 k
40 k
Noise
Input, 0.1 Hz to 10 Hz Bandwidth 0.2 µV rms
Output, 100 kHz Bandwidth 500 µV rms
Bandwidth, -3 dB
Output Rise Time, 10% to 90% Span
4Hz
200 ms
Common-Mode Voltage (CMV)
Input-to-Output, Continuous 1500 V rms, maximum
Output-to-Power, Continuous
4
±3 V, maximum
Transient ANSI/IEEE C37.90.1-1989
Common Mode Rejection (CMR)
1 k Source Imbalance, 50/60 Hz
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160 dB
Appendix B 5B Series Module Data Sheets
Normal Mode Rejection (NMR), 50/60 Hz
60 dB
Input Protection
Continuous 240 V rms, maximum
Transient ANSI/IEEE C37.90.1-1989
Output Resistance
Voltage Output Protection
Output Selection Time
50
Continuous Short to Ground
6µs@C
= 0 to 2,000 pF
load
Output Enable Control
Max Logic "0" +1 V
Min Logic "1" +2.5 V
Max Logic "1" +36 V
Input Current "0" 0.4 mA
Open Input Response
Open Input Response Time
Power Supply Voltage
Power Supply Current
Power Supply Sensitivity, RTI
Mechanical Dimensions
Upscale
10 seconds
+5 V ±5%
30 mA
±2 µV/% of V
s
2.275" x 2.375" x 0.595"
(57.8 mm x 59.1 mm x 15.1 mm)
Environmental
Temperature Range
Rated Performance -25˚Cto+85˚C
Operating -40˚Cto+85˚C
Storage -40˚Cto+85˚C
Relative Humidity 0to93%@+40˚C noncondensing
RFI Susceptibility ±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
Includes the combined effects of repeatability, hysteresis, and nonlinearity and assumes RL>50k .
Loads heavier than 50 k will degrade nonlinearity and gain temperature coefficient.
2
±1 µV/˚C is equivalent to 0.02˚ C/˚C for Type J thermocouples; 0.025˚ C/˚C for Type K and T
thermocouples; 0.016˚C/˚ C for Type E thermocouples; 0.168˚C/˚ C for Type R and S thermocouples.
3
When used with the model AC1361 CJC sensor (see Accessories section), which is provided on each
channel of 5B Series backplanes and mounting cards
4
The output common must be kept within ±3 V of power common.
.
Specifications subject to change without notice.
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Power Requirements for the
SC-2311 with 5B and SSR
Series Modules
Use Tables C-1 and C-2 to determine how much power your SC-2311
consumes and whether or not the external power option is necessary.
Most E Series DAQ devices can supply +5 V at 1 A with the exception of
DAQCard E Series devices. Refer to your E Series DAQ device user
manual for more details. Refer to Chapter 2, Configuring and Setting Up
the SC-2311, to determine how to configure your SC-2311 to obtain power
from either an E Series DAQ device or external power supply.
Table C-1. 5B Series Current Requirements
5B Series Module
(Each)
5B30 30 mA
Current Requirement at 5 VDC
C
5B31 30 mA
5B40 30 mA
5B41 30 mA
5B32 30 mA
5B34 30 mA
5B35 15 mA
5B36 15 mA
5B37 30 mA
5B38 200 mA
5B42 200 mA
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Appendix C Power Requirements for the SC-2311 with 5B and SSR Series Modules
Table C-1. 5B Series Current Requirements (Continued)
5B Series Module
(Each)
Current Requirement at 5 VDC
5B45 110 mA
5B46 110 mA
5B47 30 mA
Table C-2. SSR Series Current Requirements
SSR Series Module
(Each)
Current Requirement at 5 VDC
SSR-IDC-5 10 mA
SSR-IAC-5 10 mA
SSR-IAC-5A 10 mA
SSR-ODC-5 10 mA
SSR-OAC-5 10 mA
SSR-OAC-5A 10 mA
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Technical Support Resources
Web Support
National Instruments Web support is your first stop for help in solving
installation, configuration, and application problems and questions. Online
problem-solving and diagnostic resources include frequently asked
questions, knowledge bases, product-specific troubleshooting wizards,
manuals, drivers, software updates, and more. Web support is available
through the Technical Support section of
NI Developer Zone
ni.com
D
The NI Developer Zone at
building measurement and automation systems. At the NI Developer Zone,
you can easily access the latest example programs, system configurators,
tutorials, technical news, as well as a community of developers ready to
share their own techniques.
Customer Education
National Instruments provides a number of alternatives to satisfy your
training needs, from self-paced tutorials, videos, and interactive CDs to
instructor-led hands-on courses at locations around the world. Visit the
Customer Education section of
syllabi, training centers, and class registration.
System Integration
If you have time constraints, limited in-house technical resources, or other
dilemmas, you may prefer to employ consulting or system integration
services. You can rely on the expertise available through our worldwide
network of Alliance Program members. To find out more about our
Alliance system integration solutions, visit the System Integration section
of
ni.com
ni.com/zone
ni.com
.
is the essential resource for
for online course schedules,
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Appendix D Technical Support Resources
Worldwide Support
National Instruments has offices located around the world to help address
your support needs. You can access our branch office Web sites from the
Worldwide Offices section of
up-to-date contact information, support phone numbers, e-mail addresses,
and current events.
If you have searched the technical support resources on our Web site and
still cannot find the answers you need, contact your local office or National
Instruments corporate. Phone numbers for our worldwide offices are listed
at the front of this manual.
ni.com
. Branch office Web sites provide
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Glossary
Prefix Meanings Value
p- pico- 10
n- nano- 10
µ- micro- 10
m- milli- 10
k- kilo- 10
M- mega- 10
G- giga- 10
t- tera- 10
Numbers/Symbols
% percent
–12
–9
– 6
–3
3
6
9
12
+ positive of, or plus
– negative of, or minus
/per
° degree
Ω ohm
A
A amperes
A/D analog-to-digital
AC alternating current
AC coupled allowing the transmission of AC signals while blocking DC signals
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Glossary
ACH analog input channel signal
ADC analog-to-digital converter—an electronic device that converts an analog
voltage to a digital number
ADC resolution the resolution of the ADC measured in bits. A 16-bit ADC has a higher
resolution, and thus a higher degree of accuracy, than a 12-bit ADC.
AIGND analog input ground signal
AISENSE analog input sense signal
alias a false lower frequency component that appears in sampled data acquired
at too low a sampling rate
amplification a type of signal conditioning that improves accuracy in the resulting
digitized signal and reduces noise
AOGND analog output ground signal
asynchronous (1) hardware—a property of an event that occurs at an arbitrary time,
without synchronization to a reference clock (2) software—a property of a
function that begins an operation and returns prior to the completion or
termination of the operation
attenuate to decrease the amplitude of a signal
attenuation ratio the factor by which signal amplitude is decreased
AWG American Wire Gauge
B
bbit—one binary digit, either 0 or 1
Bbyte—eight related bits of data, an eight-bit binary number. Also used to
denote the amount of memory required to store one byte of data.
bandwidth the range of frequencies present in a signal, or the range of frequencies to
which a measuring device can respond
bipolar a signal range that includes both positive and negative values (for example,
–5Vto+5V)
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Glossary
BNC a type of coaxial signal connector
break-before-make a type of switching contact that is completely disengaged from one terminal
before it connects with another terminal
breakdown voltage the voltage high enough to cause breakdown of optical isolation,
semiconductors, or dielectric materials. See also working voltage.
C
CCelsius
carrier a main circuit board that provides multiple locations to add sub-circuits or
modules, and a means to connect them
CH channel
channel pin or wire lead to which you apply or from which you read the analog or
digital signal. Analog signalscan be single-ended or differential. For digital
signals, you group channels to form ports. Ports usually consist of either
four or eight digital channels.
channel clock the clock controlling the time interval between individual channel sampling
within a scan. Devices with simultaneous sampling do not have this clock.
Channel Wizard a utility incorporated into MAX that allows you to descriptively name
physical channels in your system
circuit trigger a condition for starting or stopping clocks
clock hardware component that controls timing for reading from or writing to
groups
CMRR common-mode rejection ratio—a measure of the ability of an instrument to
reject interference from a common-mode signal, usually expressed in
decibels (dB)
code width the smallest detectable change in an input voltage of a DAQ device
cold-junction
a method of compensating for inaccuracies in thermocouple circuits
compensation
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Glossary
common-mode noise unwanted signals that appear in equal phase and amplitude on both the
inverting and noninverting input in a differential measurement system.
Ideally, but not completely in practice, the measurement device ignores this
noise, because the measurement device is designed to respond to the
difference between the inverting and noninverting inputs.
common-mode range the input range over which a circuit can handle a common-mode signal
common-mode signal the mathematical average voltage, relative to the ground of the computer,
of the signals from a differential input
common-mode voltage any voltage present at both instrumentation amplifier inputs with respect to
amplifier ground
conditional retrieval a method of triggering in which you simulate an analog trigger using
software. Also called software triggering.
conversion time the time required, in an analog input or output system, from the moment a
channel is interrogated (such as with a read instruction) to the moment that
accurate data is available
counter/timer a circuit that counts external pulses or clock pulses (timing)
crosstalk an unwanted signal on one channel due to an input on a different channel
current drive capability the amount of current a digital or analog output channel is capable of
sourcing or sinking while still operating within voltage range specifications
current sinking the ability to dissipate current for analog or digital output signals
current sourcing the ability to supply current for analog or digital output signals
D
D/A digital-to-analog
DAC digital-to-analog converter—an electronic device that converts a digital
number into a corresponding analog voltage or current
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Glossary
DAQ data acquisition—(1) collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and inputting them to a
computer for processing; (2) collecting and measuring the same kinds of
electrical signals with A/D and/or DIO devices plugged into a computer,
and possibly generating control signals with D/A and/or DIO devices in the
same computer
dB decibel—the unit for expressing a logarithmic measure of the ratio of two
signal levels: dB=20log10 V1/V2, for signals in volts
DC direct current
DC coupled allowing the transmission of both AC and DC signals
default setting a default parameter value recorded in the driver. In many cases, the default
input of a control is a certain value (often 0) that means use the current
default setting.
device a plug-in data acquisition product, card, or pad that can contain multiple
channels and conversion devices. Plug-in products, PCMCIA cards, and
devices such as the DAQPad-1200, which connects to your computer
parallel port, are all examples of DAQ devices. SCXI modules are distinct
from devices, with the exception of the SCXI-1200, which is a hybrid.
DIFF differential mode
differential input an analog input consisting of two terminals, both of which are isolated from
computer ground, whose difference is measured
differential
measurement system
a way you can configure your device to read signals, in which you do not
need to connect either input to a fixed reference, such as the earth ground
or a building ground
digital port See port.
digital trigger a TTL level signal having two discrete levels—a high and a low level
DIN Deutsche Industrie Norme
DIO digital input/output
dithering the addition of Gaussian noise to an analog input signal for the purpose of
increasing the resolution of a measurement when using averaging
down counter performing frequency division on an internal signal
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Glossary
drivers software that controls a specific hardware device such as a DAQ device or
aGPIBinterface
dropout voltage the minimum sustained voltage required in order for the circuit to remain
active
dynamic range the ratio of the largest signal level a circuit can handle to the smallest signal
level it can handle (usually taken to be the noise level), normally expressed
in decibels
E
EMC electromechanical compliance
EMI electromagnetic interference
E Series a standard architecture for instrumentation-class, multichannel data
acquisition deices
event the condition or state of an analog or digital signal
external trigger a voltage pulse from an external source that triggers an event such as
A/D conversion
EXTREF external reference signal
EXTSTROBE external strobe signal
F
false triggering triggering that occurs at an unintended time
F
c
filtering a type of signal conditioning that allows you to filter unwanted signals from
floating signal sources signal sources with voltage signals that are not connected to an absolute
FREQ_OUT frequency output signal
SC-2311 User Manual G-6 ni.com
frequency cutoff
the signal you are trying to measure
reference or system ground. Also called nonreferenced signal sources.
Some common example of floating signal sources are batteries,
transformers, or thermocouples.
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G
GPCTR0_GATE general purpose counter timer 0 gate signal
GPCTR0_OUT general purpose counter timer 0 output signal
GPCTR0_SOURCE general purpose counter timer 0 clock source signal
GPCTR1_GATE general purpose counter timer 1 gate signal
GPCTR1_OUT general purpose counter timer 1 output signal
GPCTR1_SOURCE general purpose counter timer 1 clock source signal
Glossary
grounded measurement
system
See RSE
H
h hour
hardware triggering a form of triggering where you set the start time of an acquisition and gather
data at a known position in time relative to a trigger signal
Hz hertz—the number of scans read or updates written per second
I
I/O input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
in. inch or inches
input impedance the measured resistance and capacitance between the input terminals of a
circuit
input offset current the difference in the input bias currents of the two inputs of an
instrumentation amplifier
instrumentation
amplifier
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a circuit whose output voltage with respect to ground is proportional to the
difference between the voltages at its two inputs
Glossary
interval scanning scanning method where there is a longer interval between scans than there
is between individual channels comprising a scan
I
OH
I
OL
current, output high
current, output low
isolation a type of signal conditioning in which you isolate the transducer signals
from the computer for safety purposes. This protects you and your
computer from large voltage spikes and makes sure the measurements from
the DAQ device are not affected by differences in ground potentials.
isolation voltage the voltage that an isolated circuit can normally withstand, usually
specified from input to input and/or from any input to the amplifier output,
or to the computer bus
isothermal constructed to maintain constant temperature across area. Isothermal
construction of terminal blocks increases thermocouple measurement
accuracy.
K
kkilo—the standard metric prefix for 1,000, or 103, used with units of
measure such as volts, hertz, and meters
K 1. kelvin
2. kilo—the prefix for 1,024, or 2
computer memory
10
, used with B in quantifying data or
kbytes/s a unit for data transfer that means 1,000 or 10
3
bytes/s
kS 1,000 samples
L
LabVIEW a graphical programming language
latched digital I/O a type of digital acquisition/generation where a device or module accepts
or transfers data after a digital pulse has been received. Also called
handshaked digital I/O.
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