Table Of Contents

PXI-2556 Specifications

Version:
    Last Modified: April 21, 2017

    This document lists specifications for the PXI-2556 multiplexer module. All specifications are subject to change without notice. Visit ni.com/manuals for the most current specifications.

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    Caution  

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

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    Caution  

    Device relays might change state momentarily during electrostatic discharge.

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    Caution  

    Refer to the Read Me First: Safety and Electromagnetic Compatibility document at ni.com/manuals for important safety and compliance information.

    Topology

    Dual 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.

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    Caution  

    The protection provided by the PXI-2556 can be impaired if it is used in a manner not described in this document.

    Input Characteristics

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    Note  

    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

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    Caution  

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

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    Note  

    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.

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    Note  

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

    Typical DC path resistance

    Initial

    < 0.35 Ω

    End-of-life

    ≥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 bank to bank crosstalk

    ≤1 GHz

    <-58 dB

    ≤2 GHz

    <-53 dB

    ≤2.5 GHz

    <-50 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

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    Note  

    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

    Mechanical

    1 × 106 cycles

    Electrical (30 V, 10 mA, DC resistive)

    3 × 105 cycles

    Trigger Characteristics

    Input trigger

    Sources

    PXI trigger lines 0 to 7

    Minimum pulse width

    150 ns

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    Note  

    The PXI-2556 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

    Destinations

    PXI trigger lines 0 to 7

    Pulse width

    Programmable (1 μs to 62 μs)

    Physical Characteristics

    Relay type

    Electromechanical, latching

    I/O connectors

    10 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.)

    Weight

    227 g (8.0 oz)

    Environment

    Operating temperature

    0 °C to 55 °C

    Storage temperature

    -20 °C to 70 °C

    Relative humidity

    5% to 85%, noncondensing

    Pollution Degree

    2

    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

    Operating

    5 Hz to 500 Hz, 0.3 grms

    Nonoperating

    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.)

    Diagrams

    Figure 4. PXI-2556 Power-on State
    Figure 5. PXI-2556 Front Panel Connector
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    Note  

    For topology-specific connection information, refer to your device in the NI Switches Help.

    Accessories

    Visit ni.com for more information about the following accessories.

    Table 1. NI Accessories for the PXI-2556
    Accessory Length Part Number
    Mini-75 Ohm SMB plug to mini-75 Ohm SMB plug coaxial cable 0.3 m 197211-0R3
    1.0 m 197211-01
    Type F female to mini-75 Ohm SMB plug coaxial cable 0.3 m 197210-0R3
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    Caution  

    You must install mating connectors according to local safety codes and standards and according to the specifications provided by the connector manufacturer. You are responsible for verifying safety compliance of third-party connectors and their usage according to the relevant standard(s), including UL and CSA in North America and IEC and VDE in Europe.

    Compliance and Certifications

    Safety

    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
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    Note  

    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
    • EN 55022 (CISPR 22): Class A emissions
    • EN 55024 (CISPR 24): Immunity
    • AS/NZS CISPR 11: Group 1, Class A emissions
    • AS/NZS CISPR 22: Class A emissions
    • FCC 47 CFR Part 15B: Class A emissions
    • ICES-001: Class A emissions
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    Note  

    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.

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    Note  

    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.

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    Note  

    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 ni.com/certification, 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 ni.com/environment. 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)

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    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 ni.com/environment/weee.

    电子信息产品污染控制管理办法(中国RoHS)

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    中国客户  

    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 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)


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