Table Of Contents

PXI-2554 Specifications

    Last Modified: April 14, 2017

    This document lists specifications for the PXI-2554 multiplexer module. All specifications are subject to change without notice. Visit for the most current specifications.

    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.


    4 × 1 multiplexer

    About These Specifications

    Specifications characterize the warranted performance of the instrument under the stated operating conditions.

    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-2554 can be impaired if it is used in a manner not described in this document.

    Input Characteristics


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

    Maximum switching voltage

    30 V

    Maximum switching current (per channel)

    0.5 A

    Maximum carry current (per channel)

    0.5 A

    Maximum RF power

    10 W


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


    National Instruments 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.


    Switching active RF signals below 0 dBm may degrade signal integrity and decrease relay life. For more information about switching active RF signals visit and enter Info Code RFSwitching.

    Typical DC path resistance


    < 0.35 Ω


    ≥1.0 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)

    75 Ω nominal

    Values in parentheses are typical.

    Insertion loss

    ≤1 GHz

    <0.8 dB (<0.5 dB)

    ≤2 GHz

    <1.3 dB (<0.9 dB)

    ≤2.5 GHz

    <1.7 dB (<1.2 dB)

    Voltage standing wave ratio (VSWR)

    ≤1 GHz

    <1.25 dB (<1.1 dB)

    ≤2 GHz

    <1.5 dB (<1.3 dB)

    ≤2.5 GHz

    <1.75 dB (<1.5 dB)

    Typical isolation

    ≤1 GHz

    >47 dB

    ≤2 GHz

    >40 dB

    ≤2.5 GHz

    >40 dB

    Typical channel-to-channel skew

    <25 ps

    Typical propagation delay

    1.0 ns

    Typical rise time (10% to 90%)

    75 ps

    Figure 1. Typical Insertion Loss
    Figure 2. Typical VSWR
    Figure 3. Typical Isolation

    Dynamic Characteristics

    Maximum relay operate time

    10.4 ms


    Certain applications may require additional time for proper settling. For information about including additional settling time, refer to the NI Switches Help.

    Expected relay life


    1 × 106 cycles

    Electrical (30 V, 10 mA, DC resistive)

    3 × 105 cycles

    Trigger Characteristics

    Input trigger


    PXI trigger lines 0 to 7

    Minimum pulse width

    150 ns


    The PXI-2554 can recognize trigger pulse widths less than 150 ns if you disable digital filtering. For information about disabling digital filtering, refer to the NI Switches Help.

    Output trigger


    PXI trigger lines 0 to 7

    Pulse width

    Programmable (1 μs to 62 μs)

    Physical Characteristics

    Relay type

    Electromechanical, latching

    I/O connectors

    5 mini-75 Ohm SMB jacks, gold plated

    PXI power requirement

    3.7 W at 5 V, 0.3 W at 3.3 V

    Dimensions (L × W × H)

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


    204 g (7.2 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, 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

    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 not only to the environment but also 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 products must be sent to a WEEE recycling center. For more information about WEEE recycling centers, National Instruments WEEE initiatives, and compliance with WEEE Directive 2002/96/EC on Waste Electrical and Electronic Equipment, visit



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