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Table Of Contents

PXI-2593 Specifications

    Last Modified: April 19, 2017

    This document lists specifications for the PXI-2593. All specifications are subject to change without notice.

    PXI-2593 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.


    The protection provided by the PXI-2593 can be impaired if it is used in a manner not described in this document.

    Input Characteristics

    Maximum switching voltage

    150 V, CAT I (channel-to-channel and channel-to-ground)


    This module is rated for Measurement Category I. It is intended to carry signal voltages no greater than 100 Vrms, 150 V pk, or 150 VDC. This module can withstand up to 800 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 VAC or 230 VAC.


    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 current (per channel)

    0.5 A

    Maximum carry current (per channel)

    1 A

    Simultaneous channels at maximum current

    Up to 2


    The switching power is limited by the maximum switching current and the maximum voltage and must not exceed 10 W.

    Maximum switching power (per channel)

    10 W


    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.

    Minimum switch load

    10 μA, 10 mV

    Maximum RF carry power (per channel)

    10 W up to 500 MHz

    DC path resistance


    <1.0 Ω


    ≥2.0 Ω

    Path resistance is a combination of relay contact resistance and trace resistance. Contact resistance typically remains low for the life of a relay. At the end of relay life, the contact resistance rises rapidly above 1.0 Ω.

    RF Performance Characteristics

    Characteristic impedance (Z0)

    50 Ω nominal

    Insertion Loss
    8 × 1

    DC to 200 MHz

    <0.9 dB

    200 MHz to 500 MHz

    <1.6 dB

    16 × 1

    DC to 200 MHz

    <1.2 dB

    200 MHz to 500 MHz

    <1.9 dB

    Typical bandwidth (3 dB)

    8 × 1

    >900 MHz

    16 × 1

    >750 MHz

    8 × 1

    DC to 200 MHz


    200 MHz to 500 MHz


    16 × 1

    DC to 200 MHz


    200 MHz to 500 MHz


    Channel-to-channel skew within each 8-channel bank is less than 100 ps. Only channels from standard topologies are listed in Table 1.

    Table 1. Propagation Delay (ns)
    COM CH0-CH7 CH8-CH15
    0 1.90 to 2.00 2.55 to 2.65
    1 1.90 to 2.00
    Typical rise time (10% to 90%)

    8 × 1

    385 ps

    16 × 1

    460 ps

    Refer to the following figures for typical insertion loss, typical VSWR, typical isolation, and typical bank-to-bank crosstalk, respectively.

    Figure 1. Typical Insertion Loss
    Figure 2. Typical VSWR
    Figure 3. Typical Channel-to-Channel Isolation
    Figure 4. Typical Bank-to-Bank Crosstalk

    Dynamic Characteristics

    Relay operate time


    2.4 ms


    4.4 ms


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

    Expected relay life


    5 × 107 cycles

    Electrical (30 V, 0.3 A, DC resistive)

    3 × 105 cycles

    Trigger Characteristics

    Input trigger


    PXI trigger lines <0...7>, Front panel

    Minimum pulse width

    150 ns


    The PXI-2593 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.

    Front panel input voltage


    -0.5 V

    VL Maximum

    +0.7 V

    VH Minimum

    +2.0 V


    +3.3 V


    +5.5 V

    Output trigger


    PXI trigger lines <0...7>, Front panel

    Pulse width

    Programmable (1 μs to 62 μs)

    Front panel nominal voltage

    3.3 V TTL, 8 mA

    Physical Characteristics

    Relay type

    Electromechanical, latching

    Relay contact material

    Silver palladium and gold

    I/O connectors

    18 MCX jacks

    Trigger connectors

    2 SMB jacks

    Power requirement


    3.5 W at 5 V, 1 W at 3.3 V

    PXI Express

    4.5 W at 12 V, 1 W at 3.3 V

    Dimensions (L × W × H)

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


    330 g (12 oz)


    Operating temperature

    0 °C to 50 °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 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

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