Table Of Contents

USB-8502 Specifications

    Last Modified: February 27, 2017


    Specifications are subject to change without notice.

    The following specifications are typical for the range 0 °C to 55 °C unless otherwise noted.

    Bus Interface


    USB 2.0 High-Speed

    Power Requirements

    USB high-power bus-powered device

    Input voltage

    4.5 V min, 5.25 V max

    Working mode current

    500 mA maximum, 300 mA typical (2 ports), 250 mA typical (1 port)

    USB suspend

    2.5 mA maximum

    Physical Characteristics


    1 port

    8.38 cm x 10.29 cm x 2.49 cm (3.30 in. x 4.05 in. x 0.98 in.)

    2 port

    9.27 cm x 10.29 cm x 2.49 cm (3.65 in. x 4.05 in. x 0.98 in.)


    1 port

    207 g (7.30 oz)

    2 port

    215 g (7.58 oz)

    Cable Length

    Captive USB cable length

    2 m

    I/O Connectors


    Standard Type A plug

    High-Speed CAN Interface

    9-pin male D-SUB

    Sync Port (only on 2-port variant)

    3-pin Combicon


    Operating Environment

    Ambient temperature

    0 °C to 55 °C

    Relative humidity

    10% to 90%, noncondensing

    Maximum altitude

    2,000 m (at 25 °C ambient temperature)

    Storage Environment

    Ambient temperature

    -20 °C to 70 °C

    Relative humidity

    5% to 95%, noncondensing

    Pollution Degree


    High-Speed/FD CAN Characteristics


    NXP TJA1043T

    Max baud rate

    1 Mbps (under high speed), 5 Mbps (under flexible data rate)

    CAN_H, CAN_L bus lines voltage

    -27 VDC to +40 VDC

    Onboard Termination (If Enabled)


    120 Ω

    Sync Port

    I/O compatibility

    5V TTL compatible

    Number of generic triggers[1]


    Supported Input Time base frequencies

    1 MHz, 10 MHz, and 20 MHz with auto detection

    Supported Output Time base frequency

    1 MHz


    The USB-8502 offers port-to-port (2-port variant) and port-to-USB (both 1 port and 2 port) isolation.

    Isolation Voltage

    Port-to-earth ground


    60 VDC, Measurement Category I


    The COM signals of CAN ports on the USB-8502 are not connected to the USB ground. This isolation is intended to prevent ground loops and does not meet UL ratings for safety isolation.

    Maximum Voltage on CAN Ports

    This voltage is the maximum voltage that can be applied or output without creating a safety hazard.

    Connect only the voltages that are within these limits.


    -27 VDC to +40 VDC max, Measurement Category I

    Measurement Category I is for measurement performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.


    Do not connect to signals or use for measurements within Measurement Categories II, III, or IV.


    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, and CAT IV.


    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
    • 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

    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 Each generic trigger can be configured independently as input or output, clock or trigger. Refer to the NI-XNET Hardware and Software Help for details.

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