Table Of Contents

PXI-2514 Specifications

    Last Modified: April 19, 2017

    This document lists specifications for the PXI-2514 ( PXI-2514) fault insertion unit (FIU) switch module. All specifications are subject to change without notice. Visit for the most current specifications.



    Refer to the NI Switches Help for detailed topology information.


    The protection provided by the PXI-2514 can be impaired if it is used in a manner not described in this document.

    About These Specifications

    Specifications characterize the warranted performance of the instrument under the following operating conditions:

    • The PXI/PXIe chassis fan speed is set to High.
    • The fan filters are clean.
    • The empty slots contain filler panels.

    For more information, refer to the Maintain Forced-Air Cooling Note to Users document available at

    Typical specifications are specifications met by the majority of the instruments under the stated operating conditions. Typical specifications are not warranted.

    Data provided in this document are specifications unless otherwise noted.

    Input Characteristics

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

    Maximum switching voltage

    28 VDC, 19.8 V ACrms, CAT I[1]


    Steady state voltages applied to the NI 2514 between any two I/O connector pins in excess of the maximum switching voltage specification may damage this module.


    This module is rated for Measurement Category I and intended to carry signal voltages no greater than19.8 Vrms/28 Vpk/28 VDC. 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.


    Signal connections through the PXI-2514 are intended to go through the DUTn pin connections. Signal paths that do not use the DUTn pin connections may exceed the module’s thermal capabilities. Refer to the connector pinout in the Diagrams section of this document for DUTn pin connections.

    Maximum continuous current (per channel or common, switching or carry)

    Single path closed

    40 A

    Multiple paths closed


    Maximum pulsed current

    200 A (for 1100 μs max)


    The maximum switching power is limited by the maximum switching current and the maximum voltage, and must not exceed 1,120 W.

    Maximum switching power (per channel)

    1,120 W

    Use the following equation to determine the Maximum Possible Pulse Width (seconds) for a given Maximum Inrush Current “peak” amplitude (Amps) and Steady State Current (Amps).

    MaxPulseWidth = 45.5 0.02 ( I SteadyState ) 2 ( I PeakInrush ) 2
    DC path resistance


    5.5 mΩ


    10 mΩ

    Typical bandwidth (50 Ω system)

    >800 kHz

    Overcurrent Detection

    Overcurrent detection limit

    41 A typical

    Overcurrent detection delay

    20 ms


    After a switch operation, an overcurrent error condition occurs when both the overcurrent limit of the module is exceeded, and the overcurrent delay time has expired.

    Overtemperature Detection

    To help protect against fault conditions, the PXI-2514 incorporates circuitry to detect overtemperature conditions.


    Exceeding the module’s thermal limit induces an overtemperature condition.


    Overtemperature conditions are created when excessive power is dissipated in the channel paths such as when switching large impulses created by switching into capacitive or inductive loads or when switching a signal at a higher rate than the module dissipates the generated heat. Refer to the figures below for information about the maximum cycle rate.

    The Switching Current Waveform graph indicates where on the inrush waveform you can find the parameters necessary for determining maximum cycle rate.

    Figure 1. Switching Current Waveform
    Figure 2. Maximum Cycle Rate for Single Path Closed
    Figure 3. Maximum Cycle Rate for Multiple Paths Closed
    Figure 4. Maximum Cycle Rate Derating Factor by Pulse Width

    Determining the Maximum Cycle Rate

    Complete the following steps and use the figures above to determine the maximum cycle rate at which a channel can be switched when the peak impulse current value and duration are known.
    1. Using the Maximum Cycle Rate graph, choose the graph line that meets or exceeds the peak inrush current value of the signal being switched. Find the point on the trace that equates to the steady state current being switched by the load.
    2. Find the corresponding intersection on the y-axis which indicates the maximum cycle rate allowed for a signal with a 50 μs maximum inrush pulse duration.
    3. Find the point on the Maximum Cycle Rate Derating Factor by Pulse Width graph that corresponds to the measured pulse width of the inrush current pulse. Find the corresponding derating factor.

      Then calculate the maximum cycle rate using the following equation: MaxCycleRate = C R 50 μ s D F ( H z )

      where CR50 μs = max cycle rate for a 50 μs wide inrush current pulse in Hz

      DF = derating factor


      If the peak impulse current does not exceed 40 A, do not derate the maximum cycle rate below 31 Hz.

    Example 1—Single Path Closed

    For switching a steady state current of 4 A into a load with peak inrush current of 180 A that lasts for 400 μs, choose the 200 A graph line in the Maximum Cycle Rate graph. Find the y-axis value that corresponds to the 16 A load current (650 Hz). Then find the derating factor in the Maximum Cycle Rate Derating Factor by Pulse Width graph that corresponds to 400 μs (0.1).

    The maximum cycle rate at which this signal can be switched by the module is calculated as follows:

    MaxCycleRate = 650 H z 0.1 65 H z

    For switching a steady state current of 15 A into a load with peak inrush current of 180 A that lasts for 400 μs while another channel is also carrying 25 A, choose the 200 A graph line in the Maximum Cycle Rate for Multiple Paths Closed graph. Find the y-axis value that corresponds to the 15 A load current (300 Hz.) Then find the derating factor in the Maximum Cycle Rate Derating Factor by Pulse Width graph that corresponds to 400 μs (0.1).

    The maximum cycle rate at which this signal can be switched by the module is calculated as follows:

    MaxCycleRate = 300 H z 0.1 = 30 H z

    Dynamic Characteristics

    Relay Operate Time


    8 μs


    35 μs

    Typical relay life

    Unlimited, when operated within specified limits


    Certain applications may require additional time for proper settling. Refer to the NI Switches Help at for more information about including additional settling time.

    Trigger Characteristics

    Input trigger


    PXI trigger lines <0...7>

    Minimum pulse width

    150 ns


    The PXI-2514 can recognize trigger pulse widths less than 150 ns if you disable digital filtering. Refer to the NI Switches Help at for information about disabling digital filtering.

    Output trigger


    PXI trigger lines <0...7>

    Pulse width

    Programmable (1 µs to 62 µs)

    Physical Characteristics

    Relay type


    Front panel connector

    2 DSUB, 8 positions, male

    Power requirement

    3.3 V

    1.0 W

    5 V

    13.0 W

    PXI Express

    12 V

    14.7 W

    3.3 V

    1.4 W

    Dimensions (L × W × H)

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


    513 g (18.1 oz)


    Operating temperature

    0 °C to 50 °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 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:
    • 2006/95/EC; Low-Voltage Directive (safety)
    • 2004/108/EC; 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 (Other) are equivalent. These test and measurement circuits are not intended for direct connection to the MAINs building installations of Measurement Categories CAT II, CAT III, or CAT IV.

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