Table Of Contents

PXI-2596 Specifications

    Last Modified: December 13, 2017


    The protection provided by the PXI-2596 can be impaired if it is used in a manner not described in this document.


    Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

    The following characteristic specifications describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

    • Typical specifications describe the performance met by a majority of models.
    • Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

    Specifications are Warranted unless otherwise noted.


    Specifications are valid at 23 °C unless otherwise noted.

    All voltages are specified in DC, ACpk, or a combination unless otherwise specified.



    Dual 6 × 1 multiplexer



    Use precaution when using the PXI-2596 to avoid electrical shock.


    This module is rated for Measurement Category I and intended to carry signal voltages no greater than 100 V. This module can withstand up to 500 V impulse voltage. Do not use this module for connection to signals or for measurements within Categories II, III, or IV. Do not connect to MAINs supply circuits (for example, wall outlets) of 115 or 230 VAC.[1]


    When hazardous voltages (>42.4 Vpk/60 V DC) are present on any channel, safety low-voltage (≤42.4 Vpk/60 V DC) cannot be connected to any other channel.

    Maximum voltage (cold-switching only)

    90 Vrms, CAT I

    Maximum carry current (per channel)

    1.73 Arms

    Maximum RF carry power (50 Ω load)[2]

    150 W

    Minimum switch load[3]

    -35 dBm

    RF Performance

    Characteristic impedance (Z0)

    50 Ω, nominal

    Insertion loss

    ≤3 GHz

    <0.2 dB, warranted

    ≤8 GHz

    <0.3 dB, warranted

    ≤12.4 GHz

    <0.4 dB, warranted

    ≤18 GHz

    <0.5 dB, warranted

    ≤26.5 GHz

    <0.6 dB, warranted

    Voltage standing wave ratio (VSWR)

    ≤3 GHz

    <1.2, warranted

    ≤8 GHz

    <1.3, warranted

    ≤12.4 GHz

    <1.4, warranted

    ≤18 GHz

    <1.5, warranted

    ≤26.5 GHz

    <1.6, warranted

    Open channel isolation

    ≤3 GHz

    >80 dB, warranted

    ≤8 GHz

    >70 dB, warranted

    ≤12.4 GHz

    >60 dB, warranted

    ≤18 GHz

    >60 dB, warranted

    ≤26.5 GHz

    >55 dB, warranted

    RF carry power

    ≤3 GHz

    150 W

    ≤8 GHz

    95 W

    ≤12.4 GHz

    75 W

    ≤18 GHz

    65 W

    ≤26.5 GHz

    25 W

    Figure 1. Insertion Loss and Isolation, Typical
    Figure 2. VSWR, Typical


    Relay operate/release time[4]

    10 ms

    Recommended cycle speed

    5 channels/s

    Expected mechanical relay life

    1 × 107 cycles

    Insertion loss repeatability

    <0.03 dB, typical


    Input trigger


    PXI trigger lines <0...7>

    Minimum pulse width[5]

    150 ns

    Output trigger


    PXI trigger lines <0...7>

    Pulse width

    Software-selectable: 1 µs to 62 µs


    Relay manufacturer/PN

    Radiall/R591 series

    Relay type

    Electromechanical, non-latching

    Contact material

    Beryllium copper, gold-plated

    I/O connector

    14 SMA jacks

    SMA torque

    0.8 N · m to 1.1 N · m (7 in. · lbs to 10 in. · lbs)

    PXI power requirement

    3.3 V

    2.5 W

    5 V

    1 W

    12 V

    6 W

    Dimensions (L × W × H)

    3U, two slot, PXI/cPCI module, 21.6 cm × 4.1 cm × 13.0 cm (8.5 in. × 1.6 in. × 5.1 in.)


    391 g (13.8 oz)


    Maximum altitude

    2,000 m (at 25 °C ambient temperature)

    Pollution Degree


    Indoor use only.

    Operating Environment

    Ambient temperature range

    0 °C to 55 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2.)

    Relative humidity range

    10% to 90%, noncondensing (Tested in accordance with IEC 60068-2-56.)

    Storage Environment

    Ambient temperature range

    -40 °C to 70 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2.)

    Relative humidity range

    5% to 95%, noncondensing (Tested in accordance with IEC 60068-2-56.)

    Shock and Vibration

    Operational shock

    30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.)

    Random vibration


    5 Hz to 500 Hz, 0.31 grms (Tested in accordance with IEC 60068-2-64.)


    5 Hz to 500 Hz, 2.46 grms (Tested in accordance with IEC 60068-2-64. Test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

    Compliance and Certifications


    This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

    • IEC 61010-1, EN 61010-1
    • UL 61010-1, CSA C22.2 No. 61010-1

    For UL and other safety certifications, refer to the product label or the Online Product Certification section.

    Electromagnetic Compatibility

    This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:
    • EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
    • EN 55011 (CISPR 11): Group 1, Class A emissions
    • AS/NZS CISPR 11: Group 1, Class A emissions
    • FCC 47 CFR Part 15B: Class A emissions
    • ICES-001: Class A emissions

    In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia, and New Zealand (per CISPR 11), Class A equipment is intended for use only in heavy-industrial locations.


    Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.


    For EMC declarations, certifications, and additional information, refer to the Online Product Certification section.

    CE Compliance

    This product meets the essential requirements of applicable European Directives, as follows:

    • 2014/35/EU; Low-Voltage Directive (safety)
    • 2014/30/EU; Electromagnetic Compatibility Directive (EMC)

    Online Product Certification

    Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit, search by model number or product line, and click the appropriate link in the Certification column.

    Environmental Management

    NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.

    For additional environmental information, refer to the Minimize Our Environmental Impact web page at This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.

    Waste Electrical and Electronic Equipment (WEEE)

    EU Customers  

    At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit



    National Instruments符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于National Instruments中国RoHS合规性信息,请登录。(For information about China RoHS compliance, go to

    • 1 Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.
    • 2 NI recommends against switching active RF signals. As a relay actuates, the channel is momentarily unterminated. Some RF sources can be damaged by reflections if their outputs are not properly terminated. Refer to your RF source documentation for more information.
    • 3 National Instruments recommends against switching RF signals below -35 dBm with this device.
    • 4 Certain applications may require additional time for proper settling. Refer to the NI Switches Help for more information about including additional settling time.
    • 5 The PXI-2596 can recognize trigger pulse widths less than 150 ns if you disable digital filtering. Refer to the NI Switches Help for information about disabling digital filtering.

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