RS-485 connection via USB! DB9 type available with fixed model options, supporting 921.6kbps.
The ULI-351/361 series (DB9) is a compact USB to RS-485 converter that adds an RS-485 port to a PC's USB port. It supports USB 2.0 (12Mbps) and serial communication at speeds up to 921.6kbps. Powered by USB bus power (low power consumption <100mA), it does not require an external power supply and comes with a 0.9m USB cable. Its small housing is suitable for inline installation, making it ideal for field service and mobile applications. The 351 series supports 4-wire RS-485, while the 361 series supports 2-wire RS-485. Additionally, the DK model allows for uniform COM port numbers across multiple PCs with a fixed serial number, simplifying setup during shared operations. The driver uses FTDI VCP and operates on Windows XP to 11 and Ubuntu. It has an operating temperature range of 0 to 70°C, providing stable communication even in industrial environments.
![ULI-351D_01--20231107164926[1].jpg](https://image.mono.ipros.com/public/product/image/245492/IPROS1313393202887891990.jpg?w=280&h=280)
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basic information
- Conversion: USB⇔RS-485 (Model 351: 4-wire, Model 361: 2-wire) - Serial data rate: Up to 921.6kbps - USB specification: USB 2.0 (12Mbps), Type B (DB9 model is standard type) - Power supply method: Powered by USB port (5VDC, low power device <100mA) - Driver: FTDI Virtual COM Port (VCP) - Supported OS: Windows 98/ME/2000/XP/Vista/7/8/8.1/10/11, Linux (Ubuntu 11.10) - Installation: Inline installation - Enclosure: Plastic - Operating temperature: 0 to 70℃ - Body dimensions: 58×32×16mm (common to DB9 model) - Weight: 68g (including USB cable, ULI-351D)
Price information
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Delivery Time
※The delivery time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
- Connection of industrial PCs and RS-485 devices (PLC, measuring instruments) (all models) - Rapid serial communication in field service and mobile environments (all models: inline installation + compact) - Connection with existing DB9 interfaces (all models: DB9 female adopted) - Operation shared among multiple PCs (DK model: unified COM port with fixed serial number)
Line up（4）
| Model number | overview |
|---|---|
| ULI-351D（BB-485USB9F-4W） | USB Type B ⇔ RS-485 (DB9), 4-wire, standard model with unique serial number / COM port assignment. |
| ULI-351DK（BB-485USB9F-4W-LS） | USB Type B ⇔ RS-485 (DB9), 4-wire, fixed serial number (unified COM port for the same model) model |
| ULI-361D（BB-485USB9F-2W） | USB Type B ⇔ RS-485 (DB9), 2-wire, standard model with unique serial number / COM port assignment. |
| ULI-361DK（BB-485USB9F-2W-LS） | USB Type B ⇔ RS-485 (DB9), 2-wire, fixed serial number (unified COM port for the same model) model |
catalog（3）
Download All Catalogs![[Case Studies Included] Serial/USB Communication Devices Product Guide](https://image.mono.ipros.com/public/catalog/image/245492/IPROS12540462012250341345.jpeg?w=120&h=170)
Company information
In 1983, Advantech (Advantech Co., Ltd.) was founded in Taiwan. For over 40 years, we have been developing high-quality and high-performance computers for industrial applications. As of 2024, we offer a lineup of over 3,000 various IoT devices. As the world's No. 1 manufacturer in the industrial computer market, with a presence in 95 cities across 26 countries, we aim to cultivate a prosperous future by solving social issues through AI × IoT platform services. *Source: OMDIA - No. 1 in global market share for industrial PCs, 42.5% (2023 edition)* In Japan, we established Advantech Co., Ltd. in 1997. In 2018, we formed a capital and business alliance with Omron Nogata Co., Ltd. to further expand sales and to quickly respond to market demands by offering design to production (DMS/ODM) services. By merging Taiwan's speed with the technological expertise we have cultivated over the years, we will establish a brand that meets the needs of our partners.
