Table Of Contents

PXI-2535 Specifications

    Last Modified: April 17, 2017

    This document lists specifications for the PXI-2535 544-crosspoint, FET matrix. All specifications are subject to change without notice. Visit for the most current specifications.

    PXI-2535 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-2535 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 × 136 matrix

    Input Characteristics

    Maximum switching voltage (channel-to-ground)

    ±12 VDC, 8 VAC

    Maximum switching power (per channel, resistive)

    1.2 W

    Maximum switching current

    100 mA

    DC isolation resistance (between open terminals)

    >1 GΩ, typical at 23 °C >334 MΩ, typical at 55 °C

    Current leakage between column and ground (closed path)

    10 nA, typical (12 VDC applied at 25 °C)

    Offset voltage

    10 µV, typical

    Overvoltage protection

    Powered on

    ±36 VDC

    Powered off

    ±40 VDC

    Total path resistance, row-to-column


    9 Ω


    14 Ω

    RF Performance Characteristics

    Test setups for RF characteristics used two 1-meter cables and two NI TBX-68 connector blocks.

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

    >1 MHz, typical

    Crosstalk (50 Ω system)

    10 kHz

    <-53 dB, typical

    100 kHz

    <-33 dB, typical

    1 MHz

    <-30 dB , typical

    Dynamic Characteristics

    FET operate time[1]


    12 µs


    16 µs


    Certain applications may require additional time for proper settling.

    Maximum scan rate

    50,000 crosspoints/s

    Simultaneous drive limit

    544 switches

    Expected relay life

    Unlimited, when operated within specified limits


    During chassis power up, the row and column connections may produce a charge injection. Refer to the following figures for information about how this might affect loads that are connected to the front panel I/O connectors and referenced to earth ground.

    Chassis power-up charge injection


    9.7 μC (<500 μA for a 20 ms time interval, typical)


    0.7 μC (<40 μA for a 20 ms time interval, typical)

    Figure 1. Impact of Charge Injection at Power Up: Typical Voltage Developed vs. Resistive Load (Using Test Setup in Figure 2)
    Figure 2. Test Setup for Row and Column Connections

    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

    FET switch

    I/O connector

    Four 68-pin receptacle VHDCI

    Power requirement

    1.7 W at 3.3 V, typical, 1.3 W at 12 V, typical

    Dimensions (L × W × H)

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


    159 g (5.6 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.

    Recently Viewed Topics