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National Instruments NI 2590/2591 User Manual

National Instruments NI 2590/2591 User Manual

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Computer-Based
Instruments
NI 2590/2591 User Manual
NI 2590/2591 User Manual
November 2000 Edition
Part Number 322387B-01

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  • Page 1 Computer-Based Instruments NI 2590/2591 User Manual NI 2590/2591 User Manual November 2000 Edition Part Number 322387B-01...
  • Page 2 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 1999, 2000 National Instruments Corporation. All rights reserved.

  • Page 3: Important Information

    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.
  • Page 4 Classification requirements are the same for the Federal Communications Commission (FCC) and the Canadian Department of Communications (DOC). Changes or modifications not expressly approved by National Instruments could void the user’s authority to operate the equipment under the FCC Rules.
  • Page 5 • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Canadian Department of Communications This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
  • Page 6 Conventions The following conventions are used in this manual: <> Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name—for example, DBIO<3..0>. 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.

  • Page 7: Table Of Contents

    Contents Chapter 1 Routing Signals with Your NI 2590/2591 About the NI 2590/2591 ...1-1 Triggers...1-1 RF Switching Precautions...1-2 Contact Protection...1-2 Connecting Signals ...1-3 NI 2590 Front Connector...1-3 NI 2591 Front Connector...1-4 Software Choices ...1-5 NI-SWITCH Driver Software ...1-5 National Instruments Application Software ...1-5 Third-Party Software ...1-6...
  • Page 8 Contents Appendix C Common Questions Appendix D Technical Support Resources Glossary Index NI 2590/2591 User Manual viii ni.com...

  • Page 9: Routing Signals With Your Ni 2590/2591

    1 × 4, 50 Ω, 4.0 GHz multiplexer module, for the PXI bus. It contains information concerning their installation and operation. About the NI 2590/2591 This section summarizes the features and operation of the NI 2590/2591 switch module; refer to Chapter 2, complete details. In addition, refer to Appendix A, Specifications, for detailed specifications of the switch module.

  • Page 10: Rf Switching Precautions

    Do not exceed the channel-to-ground voltage rating. Any connections that exceed the maximum voltage for the NI 2590/2591 can result in an electrical shock hazard and damage to the switch module and any or all of the modules connected to the PXI backplane.

  • Page 11: Connecting Signals

    The following diagram shows the NI 2590 front connector. Table 1-1 describes the connector signals. © National Instruments Corporation Chapter 1 Routing Signals with Your NI 2590/2591 2590 1 × 4 1.3 GHz Mux Figure 1-1. NI 2590 Front Connector...

  • Page 12: Ni 2591 Front Connector

    Chapter 1 Routing Signals with Your NI 2590/2591 NI 2591 Front Connector The following diagram shows the NI 2591 front connector. Table 1-1 describes the connector signals. Table 1-1. Front Connector Signal Description Signal Name Type CH<0..3> Input/Output Input/Output NI 2590/2591 User Manual 2591 1 ×...

  • Page 13: Software Choices

    LabVIEW features interactive graphics, a state-of-the-art user interface, and a powerful graphical programming language. The LabVIEW NI-SWITCH VI Library, a series of virtual instruments (VIs) for using LabVIEW with National Instruments switch hardware, is included with the NI-SWITCH driver. LabWindows/CVI features interactive graphics, a state-of-the-art user interface, and uses the ANSI standard C programming language.

  • Page 14: Third-Party Software

    Microsoft Visual C++ and Microsoft Visual Basic. See the NI-SWITCH Software Readme File for version support information. Cabling and Accessory Requirements National Instruments recommends the use of cables and accessories with 50 Ω characteristic impedance with the NI 2590/2591. NI 2590/2591 User Manual...

  • Page 15: Ni 2590/2591 Operation

    Instruments for service and repair to ensure that its safety is not compromised. Connections that exceed any of the maximum signal ratings on the NI 2590/2591 can create a shock or fire hazard or can damage any or all of the devices connected to the NI 2590/2591.

  • Page 16: Functional Overview

    Chapter 2 NI 2590/2591 Operation Functional Overview The following block diagrams illustrate the key functional components of the NI 2590 and NI 2591 switch modules. The major components of the NI 2590/2591 are as follows: • • • • •...
  • Page 17 Chapter 2 NI 2590/2591 Operation MUX23 MUX01 MUX0123 Figure 2-1. NI 2590 Module Block Diagram © National Instruments Corporation NI 2590/2591 User Manual...
  • Page 18 Chapter 2 NI 2590/2591 Operation NI 2590/2591 User Manual Control Lines DECODER Figure 2-2. NI 2591 Module Block Diagram High– Frequency Relay 4 GHz Relay Module ni.com...

  • Page 19: Relay Operation

    The default (power off) connection of the NI 2591 is CH3 to COM. Refer to Figure 2-2 to see how the connections in the NI 2591 are made. © National Instruments Corporation Chapter 2 NI 2590/2591 Operation NI 2590/2591 User Manual...

  • Page 20: Switch Control Circuitry

    Switch Control Circuitry The switch control circuitry (SCC) is responsible for opening and closing relays on the NI 2590/2591. You can load commands for the SCC into scan memory using the driver software you received with your kit. Consult the online help or your software documentation for specific information on the appropriate commands.

  • Page 21: Pxi Interface

    PXI Triggers External Trigger Input The NI 2590/2591 can use an external trigger input to advance between scan setups in a scan list. Using the driver software, you can configure the switch module to route the external trigger from any of the PXI TTL trigger lines or the PXI star trigger.

  • Page 22: Modes

    SCANADV trigger goes high after a relay settles, and the SCANADV trigger goes low after the external trigger input asserts. You can use this handshaking mode for multiboard scanning. The NI 2590/2591 ignores external triggers when it is not in a wait-for-trigger state Note while scanning.
  • Page 23 The NI 2590/2591 does not support triggers on the front panel connector. If the Note trigger signal is external to the chassis, you must use a different National Instruments switch module, such as the NI 2503, as the master switch module.

  • Page 24: Specifications

    Specifications This appendix lists the specifications for the NI 2590/2591 switch module. These specifications are typical at 25 °C unless otherwise noted. NI 2590 Input Characteristics Number of relays... 3 Common-mode voltage Maximum switching voltage Maximum switching capacity per channel Maximum switching power per channel ...

  • Page 25: Dynamic Characteristics

    900 MHz ...10 W Refer to the cautions and warning in the Note Protection sections of Chapter 1, information about using your NI 2590/2591 with high-power signals. Dynamic Characteristics Relay operate time (at 20 °C) Relay release time (at 20 °C) Expected life...

  • Page 26: Pxi Trigger Bus

    See the Declaration of Conformity sheet accompanying product. © National Instruments Corporation Minimum (all relays opened)... 350 mA Maximum (all relays closed) ... 0.6 A Appendix A Specifications for NI 2590 (3.9 by 6.3 by 1.6 in.) NI 2590/2591 User Manual...
  • Page 27 Characteristic impedance (Z Insertion loss at: VSWR at: Isolation: Maximum RF carry power at 900 MHz ...10 W NI 2590/2591 User Manual Channel to earth...30 V AC...30 V DC...30 VDC DC...30 VDC at 0.33 ADC AC...30 V ) ...50 Ω...
  • Page 28 Mechanical (no load) ... 5 × 10 Electrical at maximum switching capacity... 10 Maximum (all relays closed) ... 250 mW Appendix A Specifications for NI 2591 NI 2590/2591 Operation, for important operations operations (3.9 by 6.3 by 1.6 in.) NI 2590/2591 User Manual...
  • Page 29 Maximum altitude...2,000 m Certifications and Compliances CE Mark Compliance See the Declaration of Conformity sheet accompanying product. NI 2590/2591 User Manual (EMC) emissions ...Refer to the document supplied EMI...FCC Class A compliant with the chassis for compliance to relevant directives.
  • Page 30 Servicing Your Module This appendix describes procedures for servicing your NI 2590/2591 module. Replacing the NI 2590 Relay Module The NI 2590 is constructed so that the relay module can be replaced when the relays fail. The life of the relay is nominally 10 switching the maximum rated load.
  • Page 31 The life of the relay is nominally 10 switching the maximum rated load. You can order an RF 2591 replacement relay module for your NI 2591 from National Instruments. The replacement kit contains the fully assembled module. NI 2590/2591 User Manual Ground yourself with a grounding strap or a ground connected to your PXI chassis.
  • Page 32 Remove the PXI ejector handle screw that secures the front panel. Remove the module from the base card. Install the replacement module and screws in reverse order, taking care not to damage the connector pins on the module. Appendix B Servicing Your Module 3 Base Card NI 2590/2591 User Manual...

  • Page 33: Common Questions

    Common Questions This appendix addresses common questions you may have while using your NI 2590/2591 switch module. What should I do if the software detects the module but the switches do not switch? Verify that the switches do not switch. Close your application program and then launch the soft front panel as described in the Set up and Test document you received with your kit.
  • Page 34 Do I need to program the switch module myself? The NI 2590/2591 comes with the NI-Switch driver software, which exports the full functionality of the module. NI-Switch handles the complex issues of direct memory access, interrupts, and operating system interfacing.

  • Page 35: Web Support

    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...

  • Page 36: Worldwide Support

    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.

  • Page 37: Numbers And Symbols

    Numbers and Symbols ° degrees Ω ohms percent > greater than < less than amperes alternating current amperes direct current ANSI American National Standards Institute © National Instruments Corporation Value –12 –9 – 6 –3 NI 2590/2591 User Manual...
  • Page 38 A/D conversion NI 2590/2591 User Manual ni.com...
  • Page 39 Industry Standard Architecture See Interchangeable Virtual Instrument. NI-Switch an IVI-based instrument driver that supports the National Instruments line of switch modules PCI with extensions for instrumentation © National Instruments Corporation Glossary...
  • Page 40 NI-Switch that you can use to interactively control the switch trigger any event that causes or starts some form of data capture Transistor-Transistor Logic NI 2590/2591 User Manual ni.com...
  • Page 41 VSWR Voltage Standing Wave Ratio. The impedance match of the device to the overall system. watts wire data path between nodes © National Instruments Corporation Glossary NI 2590/2591 User Manual...
  • Page 42 NI 2590. See servicing the NI 2590/2591. multiboard triggering, 2-8 to 2-9 National Instruments application software, 1-5 NI 2590/2591 switch module. See also operation of NI 2590/2591. block diagrams, 2-3 to 2-4 cabling and accessories, 1-6 common questions, C-1 to C-2...
  • Page 43 B-1 to B-3 software choices, 1-5 to 1-6 triggers, 1-1 to 1-2 NI Developer Zone, D-1 NI-Switch instrument driver, 1-5, C-2 operation of NI 2590/2591, 2-1 to 2-9 block diagrams NI 2590, 2-3 NI 2591, 2-4 functional overview, 2-2...
  • Page 44 2-7 scanning common questions, C-1 to C-2 initiating, 2-8 random scanning, 2-6 to 2-7 servicing the NI 2590/2591, B-1 to B-3 parts locator diagram NI 2590, B-1 NI 2591, B-3 replacing relay module NI 2590, B-1 to B-2...

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