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US-101-485
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USB to RS-422/485 converter

• USB to RS-485 Conversion Support
• Plug-and-Play with Auto-Installation
• Built-in 15KV ESD Protection
• No External Power Supply Required
• Supports Windows, Mac, and Linux

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    Features Applications Specification Download Ordering Code

    Features

    • Fully compliant with USB V1.1 and USB CDC V1.1
    • Supports RS-485 2-wire half-duplex communication
    • Automatic data direction control on RS-485
    • Baud rate support from 300 to 115200 bps
    • Data bit support for 5, 6, 7, or 8 bits
    • Supports None, Even, Odd parity modes
    • Stop bits: 1 or 2 selectable
    • No external power supply required
    • USB bus-powered operation
    • Operating temperature: 0–55°C
    • Compact and lightweight design
    • LED indicator for TX and RX status
    • DIN-rail and wall mount installation optional
    • Driver supports auto-installation in Windows
    • RoHS compliant for environmental safety

    Industrial USB-to-Serial with auto direction control

    US-101-485 USB to RS-485 Converter   

    US-101-485 is a compact industrial USB to RS-485 converter supporting automatic data direction control, making it ideal for reliable serial communication in harsh environments. It offers 15kV ESD protection, multi-drop support, LED indicators, and up to 1Mbps transmission speed. USB-powered and compatible with Windows, Linux, and macOS, this converter simplifies integration with PLCs, sensors, HMIs, and legacy control systems.

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    USB to RS-485/422 port layout with LED indicators

    The US-101-485 features a user-friendly interface, including a USB Type-A port for data and power input, RS-485/422 serial I/O terminal block, termination DIP switches, and a red SYS LED power indicator. Powered directly via a 5V USB connection (500mA), it simplifies setup by eliminating the need for external adapters. The termination switch enhances long-distance communication stability, and the LED indicators provide immediate system status visibility.

    Applications

    Specification

    USB

    Chipset

    Silicon Laboratories CP2102

    Compliant

    USB 1.0 , 1.1 , 2.0

    Connector

    USB type A

    Baud Rates

     Full speed 12 Mbps
    Serial Port

    Port

    1 port ( Terminal Block )

    RS-422

    RxD+ , RxD- ,TxD+ , TxD- .

    RS-485

    Data+ , Data-

    RS-422 , RS-485

    Auto Detect

    RS-422 , RS-485

    Surge Protect

    Receive buffer

    576 Byte

    Transmit buffer

    640 Byte

    Baud Rate

    300 ~ 230.4 K bps

    Flow Control

    X-On / X-Off or Hardware
    Driver OS Support

    Windows -98SE / 2000 / XP / Server 2003 / Mac osx / os9 / Linux 2.4 / 2.6
    Power

    USB Bus Power ( 5V )
    Dimension

    Size

    55 * 40 * 25 mm ( W * D * H )

    Weight

    35 gm
    Environmental

    Operating Temperature

    0~60℃

    Storage Temperature

    -20 to 85℃

    Operating Humidity

    5~95 % RH
    Regulatory Approvals

    EMC

    FCC Class A, CE Class A

    WARRANTY

    9 months

    Download

    ​Converters_USB_converter_US_101_485_Brochure_EN​
    ​Converters_USB_converter_US_101_485_Brochure_CH​

    ​PR_Series_Catalog_V1.04_EN​

    ​PR_Series_Catalog_V1.05_CH​
    ​Converters_USB_converter_US_101_485_UsersManual_EN​

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    ​Converters_Ethernet_converter_PC-E_Brochure_EN​

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