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RS-232⇔RS-422/485 Converter ULI-224D

RS-232 ⇔ RS-422/485 conversion! Simple model with DB9 connection.

The ULI-224D is an industrial converter that converts RS-232 signals to RS-422/485, extending communication distances up to 1.2 km. It adopts a port-powered method, obtaining power from the RS-232 handshake line, so no external power supply is required. It supports bidirectional communication and a maximum data rate of 115.2 kbps. The RS-422/485 side uses a DB9 connector, making it ideal for easy connections in control panels and on-site. It is compatible with serial communication devices such as Modbus RTU and can also be used for field services and testing equipment.

Product page

basic information

- Conversion: RS-232⇔RS-422/485 (bidirectional) - Communication distance: Up to 1.2km - Data rate: Up to 115.2kbps - Power supply method: Powered by RS-232 port (handshake line) - RS-232 connector: DB9 female - RS-422/485 connector: DB9 female - Operating temperature: 0 to 70°C - Size/Weight: 78×43×20mm, approximately 49g - Certification: CE, FCC, RoHS

Price information

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Delivery Time

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Model number/Brand name

ULI-224D

Applications/Examples of results

- Connection of industrial PCs and RS-422/485 devices - Long-distance serial communication (up to 1.2 km) - Space-saving installation within control panels - RS-232 to RS-485 conversion for testing equipment and lab devices

Line up(1)

Model number overview
ULI-224D(BB-4WSD9R) RS-232 DB9F ⇔ RS-422/485 DB9F, supports port power supply.

[Case Studies Included] Serial/USB Communication Devices Product Guide

PRODUCT

Data Sheet: ULI-224 Series

DOCUMENT

Recommended Products for Industrial Sites: Advantech Industrial IoT Systems & Devices Star Product Guide (2025)

CATALOG

Recommended products

Distributors

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.