RS-485 USB converter RESI-USB series

serialRS-232USB

Overview
Industrial USB-to-serial interface family including RESI-USB-SIO (1xRS232 or 1xRS485), RESI-USB-SIO3 (3xRS485) and the mobile RESI-USB-BOX (1xRS232 or 1xRS485). Separate USB power supply accessory RESI-USB-PS accepts 12–48 Vdc and provides up to 900 mA on USB output.

Supported connections and targets
These USB devices are designed to connect to controllers and HMI hosts supporting USB 1.0 or USB 2.0:

• PCs
• PLCs
• In-vehicle controllers
• Media controllers
• Single-board computers
• Raspberry Pi
• Arduino
• Custom / special hardware

How to use
Device drivers and firmware are available for download from the Software section of the RESI website. Install the appropriate driver for the host OS and select the correct variant for required serial interface type.

Variants (USB products)

• RESI-USB-SIO: USB 2.0 to 1xRS232 or 1xRS485
• RESI-USB-SIO3: USB 2.0 to 3xRS485
• RESI-USB-BOX: USB 2.0 to 1xRS232 or 1xRS485 (mobile use)
• RESI-USB-PS: External power supply 12–48 Vdc to USB, max. 900 mA

Documentation (available files - filenames)

• RESI-Book-RESI-EN.pdf
• RESI-A4-FIRST-CONTACT-EN.pdf
• RESI-LINE-CARD-96DPI-EN.pdf
• RESI-LINE-CARD-600DPI-EN.pdf
• RESI-Product-Portfolio-2025-96DPI-EN.pdf
• RESI-Product-Portfolio-2025-600DPI-EN.pdf
• RESI-OEM-EN.pdf
• RESI-CATALOG-GATEWAYS-EN-GW-94-USB Overview.pdf
• RESI-CATALOG-GATEWAYS-EN-GW-95-USB Overview 2.pdf
• RESI-CATALOG-GATEWAYS-EN-GW-96-RESI-USB-SIO.pdf
• RESI-CATALOG-GATEWAYS-EN-GW-97-RESI-USB-SIO3.pdf
• RESI-CATALOG-GATEWAYS-EN-GW-98-RESI-USB-BOX.pdf
• RESI-CATALOG-GATEWAYS-EN-GW-99-RESI-USB-PS.pdf
• RESI-M-USB-SIO-BOX-PS-EN.pdf
• RESI-PA-RESI-USB-SIO-DE-EN.pdf
• RESI-PA-RESI-USB-SIO3-DE-EN.pdf
• RESI-PA-RESI-USB-BOX-DE-EN.pdf
• RESI-PA-RESI-USB-PS-DE-EN.pdf
• RESI-DECLARATION-OF-CONFORMITY-CE-USB-EN.pdf

Additional product notes
Products are offered as separate variants and accessories. Choose the variant matching the required serial interface count and type. Drivers and additional software tools are provided in the Software section.

Technical specifications

• Reference (displayed product attribute): RESI-USB-SIO3
• Commercial model name: RESI-USB-SIO3
• Available variants: RESI-USB-SIO, RESI-USB-SIO3, RESI-USB-BOX, RESI-USB-PS
• USB interface: USB 1.0 / USB 2.0 (host)
• Serial outputs: RS232 and/or RS485 depending on variant; RESI-USB-SIO = 1xRS232 or 1xRS485; RESI-USB-SIO3 = 3xRS485; RESI-USB-BOX = 1xRS232 or 1xRS485
• External power accessory: RESI-USB-PS, 12–48 Vdc input, USB output up to 900 mA
• Price (excl. tax): 120.80 EUR (attribute price for selected variant)
• Price (numeric, excl. tax): 120.80
• Currency: EUR
• Unit: piece
• Quantity (selected variant stock): 10
• Quantity (all versions total): 40
• Date added: 2024-02-04
• Last updated: 2025-03-02