National Instruments 321906B-01 - Manuals

© National Instruments Corporation vii NI 2501/2503 User Manual Contents Chapter 1Routing Signals with Your NI 2501/2503 About the NI 2501/2503 ................................................................................................ 1-1 Analog Bus ...............................................

Contents NI 2501/2503 User Manual viii © National Instruments Corporation Appendix BAccessories Appendix CCustomizing Your Card Appendix DArchitecture Drawings Appendix ECommon Questions Appendix FCustomer Communication Glossary Index Figures Figure 1-1. Front Connector Pinout Assignments for Two-Wi...

Chapter 1 Routing Signals with Your NI 2501/2503 NI 2501/2503 User Manual 1-2 © National Instruments Corporation Refer to Appendix B, Accessories , for more information on terminal blocks you can order from National Instruments. You can also use multiple NI 2501/2503 cards together to expand the siz...

Chapter 1 Routing Signals with Your NI 2501/2503 © National Instruments Corporation 1-3 NI 2501/2503 User Manual Refer to Chapter 2, NI 2501/2503 Operation , for more information on triggers. Cold-Junction Sensor Channel For low-voltage measurements, such as those provided by thermocouples, the NI 2...

Chapter 1 Routing Signals with Your NI 2501/2503 NI 2501/2503 User Manual 1-4 © National Instruments Corporation Connecting Signals This section describes the signal connections to the NI 2501/2503 module via the module front connector. This section also includes specifications and connection instru...

Chapter 1 Routing Signals with Your NI 2501/2503 NI 2501/2503 User Manual 1-10 © National Instruments Corporation Contact Protection Caution When inductive loads are connected to the relays, a large counter electromotive force may occur at relay switching time due to the energy stored in the inducti...

Chapter 1 Routing Signals with Your NI 2501/2503 © National Instruments Corporation 1-11 NI 2501/2503 User Manual National Instruments Application Software LabVIEW and LabWindows/CVI are innovative program development software packages for data acquisition and control applications. LabVIEW uses grap...

© National Instruments Corporation 2-1 NI 2501/2503 User Manual 2 NI 2501/2503 Operation This chapter contains a functional overview of the NI 2501/2503 module and explains the operation of each functional unit making up the NI 2501/2503 module. Functional Overview The block diagrams on the followin...

Chapter 2 NI 2501/2503 Operation © National Instruments Corporation 2-5 NI 2501/2503 User Manual Four-Wire Mode Four-wire mode is typically used for resistance measurements. In this mode, CHxA+, CHxA–, CHxB+, and CHxB–, are switched together to COMxA+, COMxA–, COMxB+, and COMxB–. Matrix Mode By addi...

Chapter 2 NI 2501/2503 Operation NI 2501/2503 User Manual 2-6 © National Instruments Corporation • Generate a scanner advanced trigger • Generate a breakpoint interrupt You can use the driver software to configure the switch card for continuous or one-time scanning. In continuous scanning, the switc...

Chapter 2 NI 2501/2503 Operation © National Instruments Corporation 2-7 NI 2501/2503 User Manual Routing the external trigger from the front connector to the PXI trigger lines gives you the capability to trigger multiple switch cards with only one board connected to the external trigger from the mea...

Chapter 2 NI 2501/2503 Operation NI 2501/2503 User Manual 2-8 © National Instruments Corporation Initiating Scanning When you use the NI 2501/2503 to initiate a scan, make sure the measurement device is armed (waiting for trigger) before enabling scanning on the switch card. Enabling scanning causes...

© National Instruments Corporation A-1 NI 2501/2503 User Manual A Specifications This appendix lists the specifications for the NI 2501 and NI 2503 switch cards. These specifications are typical at 25 ° C unless otherwise noted. NI 2501 Input Characteristics Number of Channels .........................

Appendix A Specifications for NI 2501 NI 2501/2503 User Manual A-2 © National Instruments Corporation Transfer Characteristics Channel Amplifier (Unity Gain) Offset Voltage (Differential) ..................1.2 mV max Cold-Junction Sensor Channel Amplifier (Unity Gain) Offset Voltage Maximum ...........

Appendix A Specifications for NI 2501 © National Instruments Corporation A-3 NI 2501/2503 User Manual 0.006% Accuracy With output buffer selected ..... 30 µs Without output buffer .............. 60 µs 0.0015% Accuracy With output buffer selected ..... 80 µs Without output buffer .............. 160 µ...

Appendix A Specifications for NI 2501 NI 2501/2503 User Manual A-4 © National Instruments Corporation Environment Operating Temperature ........................ 0 ° to 50 ° C Storage Temperature............................ –55 ° to 150 ° C Relative Humidity...................................5% to 90...

Appendix A Specifications for NI 2503 © National Instruments Corporation A-7 NI 2501/2503 User Manual Physical Dimensions............................................. 10 by 16 cm (3.9 by 6.3 in.) Weight .................................................... 0.118 kg (0.4 lb.) I/O Connector ..............

© National Instruments Corporation C-1 NI 2501/2503 User Manual C Customizing Your Card This appendix describes options for customizing your NI 2501/2503 card. Current-Loop Receivers The NI 2501/2503 modules have sockets for transforming individual channels to current-to-voltage converters. National...

© National Instruments Corporation D-1 NI 2501/2503 User Manual D Architecture Drawings This appendix contains architecture drawings for the NI 2501 and NI 2503 switch cards. The drawings show the signal names that are used when the boards are in two-wire mode. To make these drawings relevant for on...

© National Instruments Corporation E-1 NI 2501/2503 User Manual E Common Questions This appendix addresses common questions you may have while using your NI 2501 or NI 2503 switch card. How fast can I scan with the NI 2501 switch card? The NI 2501 can be scanned as fast as 250 Kscans/s. However, at ...

© National Instruments Corporation F-1 NI 2501/2503 User Manual F Customer Communication For your convenience, this appendix contains forms to help you gather the information necessary to help us solve your technical problems and a form you can use to comment on the product documentation. When you c...

NI 2501/2503 User Manual F-2 © National Instruments Corporation Fax-on-Demand Support Fax-on-Demand is a 24-hour information retrieval system containing a library of documents on a wide range of technical information. You can access Fax-on-Demand from a touch-tone telephone at 512 418 1111. E-Mail S...

Technical Support Form Photocopy this form and update it each time you make changes to your software or hardware, and use the completed copy of this form as a reference for your current configuration. Completing this form accurately before contacting National Instruments for technical support helps ...

NI 2501/2503 Hardware and Software Configuration Form Record the settings and revisions of your hardware and software on the line to the right of each item. Complete a new copy of this form each time you revise your software or hardware configuration, and use this form as a reference for your curren...

Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. Title: NI 2501/2503 User Manual Edition Date: July 1998 Part Number: 321906B-01 Please comment on the comp...

© National Instruments Corporation G-1 NI 2501/2503 User Manual Glossary Prefix Meanings Value n- nano- 10 – 9 µ- micro- 10 – 6 m- milli- 10 – 3 k- kilo- 10 3 M- mega- 10 6 G- giga- 10 9 Symbols ° degrees Ω ohms % percent ± plus or minus A A amperes AC alternating current ANSI American National Stan...

© National Instruments Corporation I-1 NI 2501/2503 User Manual Index Numbers 1_WIRE_LO_REF signal (table), 1-9+5 V signal (table), 1-9 A AB<0..1> ± signal (table), 1-9 AB0 ± signal (table), 1-9 AB0A ± signal (table), 1-9 AB0B ± signal (table), 1-9 accessories for NI 2501/2503, B-1amplifier fo...