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RS-232⇔422/485 Converter ULI-224TH

Panel installation compatible! Standard models and insulation/wide temperature compatible models are available.

The ULI-224TH/THC is an industrial converter that converts RS-232 signals to RS-422/485, achieving high-speed communication of up to 460.8kbps and long-distance transmission of up to 1.2km. Both models feature a robust metal housing suitable for panel mounting and support industrial protocols such as Modbus RTU. The ULI-224TH is a non-isolated version with a standard temperature range (0 to +70°C), making it ideal for relatively stable environments like control panels. On the other hand, the ULI-224THC supports **2kV optical isolation and a wide temperature range (-40 to +80°C)**, making it perfect for harsh industrial environments or locations requiring isolation protection. Both models require an external power supply (10 to 30VDC).

Product page

basic information

【ULI-224TH/THC Common】 - Conversion: RS-232 ⇔ RS-422/485 (Bidirectional) - Communication Distance: Up to 1.2km - Data Rate: Up to 460.8kbps - RS-232 Connector: DB9 Female - RS-422/485 Connection: Terminal Block (Removable) - Mode: RS-422 (4-wire), RS-485 (2-wire/4-wire) - LED Display: TD, RD (Power Indicator) - Power Supply Method: External Power Supply (10-30VDC) - Enclosure: Metal, Panel Mount (DIN Rail Option Available) - Size/Weight: 99.1×22.9×73.7mm, Approximately 150g - Certification: CE, FCC, RoHS 【ULI-224TH】 - Isolation Protection: None - Operating Temperature: 0 to +70°C 【ULI-224THC】 - Isolation Protection: 2kV Optical Isolation (Data Line) - Operating Temperature: -40 to +80°C

Price information

For more details, please contact us.

Delivery Time

Please contact us for details

The delivery date may vary depending on the quantity, so please feel free to contact us.

Model number/Brand name

ULI-224TH/THC

Applications/Examples of results

- RS-232 to RS-485 conversion within the control panel - Connection with Modbus RTU compatible devices - Serial communication for testing equipment and lab instruments - ULI-224THC: Sites requiring harsh environment and insulation protection - ULI-224THC: Industrial equipment requiring voltage surge protection

Line up(2)

Model number overview
ULI-224TH(BB-SCP211-DFTB3) Non-insulated, standard temperature model
ULI-224THC(BB-SCP311T-DFTB3) 2kV insulation, wide temperature (−40 to +80°C) compatible model

Data Sheet: ULI-224 Series

DOCUMENT

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

PRODUCT

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

CATALOG

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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.