Table Of Contents

PXI-2533 Specifications

    Last Modified: April 14, 2017

    This document lists specifications for the PXI-2533 256-crosspoint, SSR matrix. All specifications are subject to change without notice. Visit for the most current specifications.

    PXI-2533 Specifications

    Specifications characterize the warranted performance of the instrument under the stated operating conditions. Data in this document are Specifications unless otherwise noted.

    Typical Specifications are specifications met by the majority of the instrument under the stated operating conditions and are tested at 23 °C ambient temperature. Typical specifications are not warranted.

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


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


    The protection provided by the PXI-2533 can be impaired if it is used in a manner not described in this document.


    Refer to the NI Switches Help at for detailed topology information.


    1-wire 4 × 64 matrix

    Input Characteristics

    Maximum switching voltage (channel-to-ground and channel-to-channel)

    ±55 VDC, 30 VACrms

    Maximum switching power

    55 W

    Maximum switching current

    1 A


    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.

    DC isolation resistance

    >2 GΩ, typical

    Offset voltage

    2 µV, typical

    Total path resistance, row-to-column


    1 Ω


    1.4 Ω

    RF Performance Characteristics

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

    >1.5 MHz

    Typical crosstalk (50 Ω system)

    10 kHz

    <-40 dB

    100 kHz

    <-20 dB

    Dynamic Characteristics

    SSR operate time[1]


    724 µs


    2.5 ms


    Certain applications may require additional time for proper settling.

    Maximum scan rate

    400 crosspoints/s (when switching <20 V and 1 A, refer to the following figure for other voltages)

    Simultaneous drive limit

    256 relays

    Expected relay life

    Unlimited, when operated within specified limits

    Figure 1. SSR Cycle Frequency Derating by Load Current and Load Voltage

    Trigger Characteristics

    Input trigger


    PXI trigger lines 0 to 7

    Minimum pulse width

    70 ns

    Output trigger


    PXI trigger lines 0 to 7

    Pulse width

    Programmable (1 µs to 62 µs)

    Physical Characteristics

    Relay type

    Solid-state relay (SSR)

    I/O connector

    68-pin male SCSI

    Power requirement

    1 W at 3.3 V, typical, 8 W at 5 V, typical (all crosspoints closed)

    Dimensions (L × W × H)

    3U, one slot, PXI/cPCI module, 21.6 × 2.0 × 13.0 cm (8.5 × 0.8 × 5.1 in.)


    238 g (8.4 oz)


    Operating temperature

    0 °C to 55 °C

    Storage temperature

    -40 °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 sensitive electrical equipment for measurement, control, and laboratory use:

    • EN 61326-2-1 (IEC 61326-2-1): 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, 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 Operate time is the time from trigger received by hardware to switch output activation.

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