Table Of Contents

PXI-2529 Specifications

    Last Modified: December 13, 2017


    The protection provided by the PXI-2529 can be impaired if it is used in a manner not described in this document.


    To ensure the specified EMC performance, operate this product only with shielded cables and accessories.


    Device relays might change state momentarily during electrostatic discharge.


    Refer to the Read Me First: Safety and Electromagnetic Compatibility document at for important safety and compliance information.


    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.



    2-wire 4 × 32 matrix

    2-wire 8 × 16 matrix

    2-wire 4 × 16 matrix


    All input specifications are DC, ACrms, or a combination unless otherwise specified.


    This module is rated for Measurement Category I and is intended to carry signal voltages no greater than 150 V. This module can withstand up to 800 V impulse voltage. Do not use this module for connections to signals or for measurements within Measurement Categories II, III, or IV.


    Do not connect to MAINs supply circuits (e.g., wall outlets) of 115 or 230 VAC. Refer to the Read Me First: Safety and Electromagnetic Compatibility document for more information about Measurement Categories.


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

    Maximum switching voltage


    150 V


    150 V, CAT I


    The maximum switching power is limited by the maximum switching current, the maximum voltage, and must not exceed 30 W, 37.5 VA.


    Switching inductive loads (for example, motors and solenoids) can produce high voltage transients in excess of the module’s rated voltage. Without additional protection, these transients can interfere with module operation and impact relay life. For more information about transient suppression, visit and enter the Info Code induct.

    Maximum switching power (per channel)

    30 W, 37.5 VA

    Maximum switching current (per channel)

    1 A

    Maximum carry current (per channel)

    2 A

    Maximum module current

    8 A

    DC path resistance[1]


    <1 Ω, warranted


    ≥2 Ω

    Thermal EMF

    <9 μV

    Minimum current

    10 μA

    RF Performance

    Single crosspoint bandwidth (50 Ω system, one row to one column)

    >10 MHz, typical

    Crosstalk (50 Ω system)

    10 kHz

    <-80 dB, typical

    100 kHz

    <-65 dB, typical

    1 MHz

    <-50 dB, typical


    Relay operate time[2]

    4 ms, maximum

    Release time (at 20 °C)

    4 ms, maximum

    Expected relay life[3]


    5 × 107 cycles


    30 V, 100 mA, resistive

    5 × 105 cycles

    30 V, 1 A, resistive

    1 × 105 cycles


    Input trigger[4]


    PXI trigger lines <0...7>

    Minimum pulse width

    150 ns

    Output trigger


    PXI trigger lines <0...7>

    Pulse width

    Software-selectable: 1 µs to 62 µs

    Front panel voltage

    +3.3 V TTL, 8 mA, nominal


    Relay type

    Electromechanical, non-latching

    Relay contact material

    Silver palladium and gold

    I/O connector

    100-pin high-density interconnect (HDI)

    Power requirement


    6 W at 5 V

    2.5 W at 3.3 V

    PXI Express

    7.5 W at 12 V

    2.5 W at 3.3 V

    Dimensions (L × W × H)

    3U, one slot, PXI/cPCI module

    21.6 cm × 2.0 cm × 13.0 cm (8.5 in. × 0.8 in. × 5.1 in.)


    410 g (15 oz)


    Operating temperature

    0 °C to 55 °C

    Storage temperature

    -20 °C to 70 °C

    Relative humidity

    5% to 85%, noncondensing

    Pollution Degree


    Maximum altitude

    2,000 m

    Indoor use only.

    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, 0.3 grms


    5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC 60068-2-64. Nonoperating 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 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 and certifications, 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 Path resistance is a combination of relay contact resistance and trace resistance and is measured as the combined resistance of the high and low signal paths from one row to one column. Contact resistance typically remains low for the life of a relay. At the end of relay life, the contact resistance rises rapidly above 1 Ω.
    • 2 Certain applications may require additional time for proper settling. Refer to the NI Switches Help for more information about including additional settling time.
    • 3 The relays used in the PXI-2529 are field replaceable. Refer to the NI Switches Help for information about replacing a failed relay.
    • 4 The PXI-2529 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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