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- Dual-Port Design: Supports two independent serial communication ports in one module:
- Port 1: Configurable RS232/RS422/RS485 interface.
- Port 2: Ground-isolated RS422/RS485 interface.
- USB 2.0 Interface: High-speed USB 2.0 device controller ensures reliable data transfer and compatibility with modern systems.
- ASIX MCS7820 Chipset: Utilizes the ASIX MCS7820 USB-to-serial controller for stable performance and advanced serial communication features.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency.
- Auto Data Direction Control (ADDC): Automatically manages data flow direction in RS485 mode, simplifying half-duplex communication.
- LED Indicators: Dedicated LEDs for power and data activity on each port (PWR, Serial1, Serial2).
- Ground Isolation: Port 2 is fully isolated from the USB bus and Port 1, eliminating ground loop interference and enhancing safety in industrial environments.
- Flexible Configuration: DIP switch settings allow users to select between RS232, RS422, or RS485 modes for each port.
- Compact Metal Enclosure: Rugged metal housing provides electromagnetic shielding and mechanical durability.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200–400mA), eliminating the need for an external power supply.
- Wide Environmental Tolerance: Operates reliably in temperatures from 0°C to 55°C and humidity up to 95% RH.
- Port 1: Configurable RS232/RS422/RS485 interface.
- Port 2: Ground-isolated RS422/RS485 interface.
- USB 2.0 Interface: High-speed USB 2.0 device controller ensures reliable data transfer and compatibility with modern systems.
- ASIX MCS7820 Chipset: Utilizes the ASIX MCS7820 USB-to-serial controller for stable performance and advanced serial communication features.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency.
- Auto Data Direction Control (ADDC): Automatically manages data flow direction in RS485 mode, simplifying half-duplex communication.
- LED Indicators: Dedicated LEDs for power and data activity on each port (PWR, Serial1, Serial2).
- Ground Isolation: Port 2 is fully isolated from the USB bus and Port 1, eliminating ground loop interference and enhancing safety in industrial environments.
- Flexible Configuration: DIP switch settings allow users to select between RS232, RS422, or RS485 modes for each port.
- Compact Metal Enclosure: Rugged metal housing provides electromagnetic shielding and mechanical durability.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200–400mA), eliminating the need for an external power supply.
- Wide Environmental Tolerance: Operates reliably in temperatures from 0°C to 55°C and humidity up to 95% RH.
Comprehensive Product Summary: UTS301-I USB to Serial Converter
### 1. Product Overview
Product Name: UTS301-I
Model Number: UTS301-I
Series: UTS USB-to-Serial Converter Series
Article Number: UTS301-I
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net / info@rayontech.com.tw
- Website: [www.rayontech.com.tw](http://www.rayontech.com.tw) / [www.rayontech.com](http://www.rayontech.com)
Product Description:
The Rayon UTS301-I is a dual-port USB-to-serial converter designed for industrial and professional communication applications. It provides one configurable RS232/RS422/RS485 port and one ground-isolated RS422/RS485 port within a single compact metal enclosure. The device operates in USB bus-powered mode and is engineered for safety, flexibility, and cost efficiency. It is ideal for environments requiring mixed serial communication standards and electrical isolation to prevent ground loops.
### 2. Key Features
- Dual-Port Design: Supports two independent serial communication ports in one module:
- Port 1: Configurable RS232/RS422/RS485 interface.
- Port 2: Ground-isolated RS422/RS485 interface.
- USB 2.0 Interface: High-speed USB 2.0 device controller ensures reliable data transfer and compatibility with modern systems.
- ASIX MCS7820 Chipset: Utilizes the ASIX MCS7820 USB-to-serial controller for stable performance and advanced serial communication features.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency.
- Auto Data Direction Control (ADDC): Automatically manages data flow direction in RS485 mode, simplifying half-duplex communication.
- LED Indicators: Dedicated LEDs for power and data activity on each port (PWR, Serial1, Serial2).
- Ground Isolation: Port 2 is fully isolated from the USB bus and Port 1, eliminating ground loop interference and enhancing safety in industrial environments.
- Flexible Configuration: DIP switch settings allow users to select between RS232, RS422, or RS485 modes for each port.
- Compact Metal Enclosure: Rugged metal housing provides electromagnetic shielding and mechanical durability.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200–400mA), eliminating the need for an external power supply.
- Wide Environmental Tolerance: Operates reliably in temperatures from 0°C to 55°C and humidity up to 95% RH.
### 3. Technical Specifications
Physical Characteristics:
- Dimensions: 92 mm (W) × 118 mm (L) × 27 mm (H)
- Weight: Approx. 250–300 g (metal enclosure)
- Material: Metal case for EMI protection and durability
- Color: Industrial gray/silver finish
Electrical Characteristics:
- Power Supply: USB bus-powered (5VDC)
- Current Consumption: 200 mA typical, up to 400 mA maximum
- Isolation: Port 2 isolated from USB and Port 1 ground
USB Interface:
- Connector Type: USB Type-B female
- Standard: USB 2.0 compliant
- Controller: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Hot-Pluggable: Supports plug-and-play operation
Serial Interfaces:
- Connector Type: DB9 male connectors (two ports)
- Number of Ports: 2
- Port 1: RS232/RS422/RS485 selectable
- Port 2: Isolated RS422/RS485 selectable
- Signal Pins: TX+, TX−, RX+, RX−, GND
- Control: DIP switch selectable interface type
- Auto Direction Control: Supported in RS485 mode
- Isolation: Port 2 galvanically isolated from USB and Port 1
Environmental Conditions:
- Operating Temperature: 0°C to 55°C
- Storage Temperature: 0°C to 65°C
- Operating Humidity: 10% to 95% RH (non-condensing)
- Storage Humidity: 5% to 95% RH (non-condensing)
### 4. Functionality
Operating Principle:
The UTS301-I converts USB signals from a host computer into serial communication signals (RS232, RS422, or RS485). It enables PCs or embedded systems without native serial ports to interface with industrial devices such as PLCs, sensors, controllers, and communication modules.
Use Cases:
- Industrial automation and control systems
- Data acquisition and monitoring
- POS (Point-of-Sale) systems
- SCADA and remote telemetry
- Laboratory instrumentation
- Serial device networking and diagnostics
Applications:
- Connecting RS232-based legacy equipment to modern USB-only computers
- Isolated RS485 communication in noisy or high-voltage environments
- Multi-protocol serial communication setups requiring flexibility and safety
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems supporting USB CDC or ASIX drivers.
- Works with standard serial communication software and terminal emulators.
- Supports hot-plugging and automatic COM port assignment.
### 5. Components & Accessories
Included Components:
- UTS301-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (for host connection)
- User manual and configuration guide
- DIP switch configuration chart
Optional Accessories:
- TB485 Kit: DB9 Female to RS485 terminal block adapter for easy wiring to RS485 networks.
- Mounting Hardware: Optional brackets for panel or DIN-rail mounting (depending on installation requirements).
Connectors:
- USB Port: Type-B female connector for host connection.
- Serial Ports: Two DB9 male connectors for RS232/RS422/RS485 interfaces.
### 6. Installation & Setup
Requirements:
- Available USB 2.0 port on host computer
- Supported operating system with appropriate driver (ASIX MCS7820)
- USB cable (included)
Mounting Options:
- Desktop placement
- Panel or wall mounting using optional brackets
- DIN-rail mounting (optional accessory)
Configuration:
- DIP Switch Settings:
- Port 1: Select RS232, RS422, or RS485 mode
- Port 2: Select RS422 or RS485 mode
- LED Indicators:
- PWR: Power ON
- Serial1: TXD/RXD activity for Port 1
- Serial2: TXD/RXD activity for Port 2
Setup Procedure:
1. Connect the UTS301-I to the host computer via USB cable.
2. Install the ASIX MCS7820 driver if required.
3. Configure DIP switches for desired serial interface modes.
4. Connect serial devices to the DB9 ports.
5. Verify LED indicators for power and data activity.
6. Begin communication using terminal or control software.
### 7. Performance & Capabilities
Data Handling:
- 512-byte FIFO per port ensures smooth data flow and minimizes buffer overrun.
- Auto Data Direction Control (ADDC) simplifies RS485 half-duplex communication.
Speed & Throughput:
- Supports standard baud rates up to 921.6 kbps (depending on driver and OS support).
- Low latency USB-to-serial conversion for real-time control applications.
Capacity:
- Two independent serial channels in one compact device.
- Supports simultaneous operation of both ports with full isolation on Port 2.
Efficiency:
- Bus-powered operation reduces wiring complexity.
- Compact design minimizes space requirements in control cabinets.
Limitations:
- Port 1 shares ground with USB; not isolated.
- Limited to USB 2.0 data rates (compatible with USB 3.0/3.1 ports in backward mode).
- Requires DIP switch reconfiguration for interface changes.
### 8. Standards & Compliance
Compliance:
- USB 2.0 Specification: Fully compliant with USB 2.0 standard.
- Serial Communication Standards: RS232, RS422, RS485 (EIA/TIA compliant).
- Isolation: Meets industrial isolation standards for RS422/RS485 communication.
- RoHS Compliance: Manufactured in accordance with environmental and safety regulations.
Certifications:
- CE and FCC compliance (typical for Rayon industrial communication products).
- Designed for industrial-grade EMI/EMC performance.
Industry Standards Supported:
- EIA/TIA-232-F (RS232)
- EIA/TIA-422-B (RS422)
- EIA/TIA-485-A (RS485)
### 9. Additional Information
Warranty:
Standard manufacturer warranty (typically 1 year) covering defects in materials and workmanship.
Technical Support:
Rayon Technology provides direct technical support via email. Engineers with over 35 years of experience assist with serial communication integration and troubleshooting.
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to excessive moisture or vibration.
Firmware & Driver Updates:
- Driver updates available from ASIX and Rayon Technology websites.
- EEPROM-based iSerial feature supported on MCS7820 chipset for consistent COM port assignment across USB ports.
iSerial Feature (MCS7820):
The MCS7820 controller supports an optional iSerial feature when a unique serial number is programmed into the EEPROM. This ensures that the same COM port number is retained regardless of which USB port the device is connected to, simplifying multi-port system configurations and avoiding reconfiguration in Windows environments.
Related Models & Upgrade Options:
- UTS111: Single flexible RS232/RS422/RS485 port (non-isolated)
- UTS111-I: Single ground-isolated RS232/RS422/RS485 port
- UTS112 / UTS112-I: Dual-port versions (non-isolated / isolated)
- UTS134 / UTS134i: Four-port RS422/RS485 converters (non-isolated / isolated)
- UTS400 / UTS040: Four-port RS232 converters (non-isolated / isolated)
- UTS485: Two RS232 + two isolated RS422/RS485 ports
- UTS310-I: One isolated RS232 and one flexible RS232/RS422/RS485 port
Product Positioning:
The UTS301-I is positioned as a “less expensive, safe, and flexible” model within Rayon’s USB-to-serial converter lineup. It bridges the gap between cost-effective flexible models and high-end isolated models, offering both configurability and electrical isolation in a single compact unit.
### Summary
The Rayon UTS301-I USB-to-Serial Converter is a robust, dual-port communication interface designed for industrial and professional applications requiring mixed serial standards and electrical isolation. Featuring one configurable RS232/RS422/RS485 port and one ground-isolated RS422/RS485 port, it provides exceptional flexibility for system integrators and engineers. The use of the ASIX MCS7820 chipset ensures reliable USB 2.0 performance, while the 512-byte FIFO buffers and Auto Data Direction Control enhance communication efficiency. Its metal enclosure, LED indicators, and DIP switch configurability make it a durable and user-friendly solution for diverse serial communication environments.
With its combination of safety, flexibility, and cost-effectiveness, the UTS301-I is ideal for industrial automation, control systems, and data communication networks where both isolated and non-isolated serial connections are required.
### 1. Product Overview
Product Name: UTS301-I
Model Number: UTS301-I
Series: UTS USB-to-Serial Converter Series
Article Number: UTS301-I
Manufacturer: Rayon Technology Co., Ltd.
Manufacturer Address: 2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact:
- Tel: +886-2-82858362
- Fax: +886-2-82857065
- Email: rayon@ms1.hinet.net / info@rayontech.com.tw
- Website: [www.rayontech.com.tw](http://www.rayontech.com.tw) / [www.rayontech.com](http://www.rayontech.com)
Product Description:
The Rayon UTS301-I is a dual-port USB-to-serial converter designed for industrial and professional communication applications. It provides one configurable RS232/RS422/RS485 port and one ground-isolated RS422/RS485 port within a single compact metal enclosure. The device operates in USB bus-powered mode and is engineered for safety, flexibility, and cost efficiency. It is ideal for environments requiring mixed serial communication standards and electrical isolation to prevent ground loops.
### 2. Key Features
- Dual-Port Design: Supports two independent serial communication ports in one module:
- Port 1: Configurable RS232/RS422/RS485 interface.
- Port 2: Ground-isolated RS422/RS485 interface.
- USB 2.0 Interface: High-speed USB 2.0 device controller ensures reliable data transfer and compatibility with modern systems.
- ASIX MCS7820 Chipset: Utilizes the ASIX MCS7820 USB-to-serial controller for stable performance and advanced serial communication features.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency.
- Auto Data Direction Control (ADDC): Automatically manages data flow direction in RS485 mode, simplifying half-duplex communication.
- LED Indicators: Dedicated LEDs for power and data activity on each port (PWR, Serial1, Serial2).
- Ground Isolation: Port 2 is fully isolated from the USB bus and Port 1, eliminating ground loop interference and enhancing safety in industrial environments.
- Flexible Configuration: DIP switch settings allow users to select between RS232, RS422, or RS485 modes for each port.
- Compact Metal Enclosure: Rugged metal housing provides electromagnetic shielding and mechanical durability.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200–400mA), eliminating the need for an external power supply.
- Wide Environmental Tolerance: Operates reliably in temperatures from 0°C to 55°C and humidity up to 95% RH.
### 3. Technical Specifications
Physical Characteristics:
- Dimensions: 92 mm (W) × 118 mm (L) × 27 mm (H)
- Weight: Approx. 250–300 g (metal enclosure)
- Material: Metal case for EMI protection and durability
- Color: Industrial gray/silver finish
Electrical Characteristics:
- Power Supply: USB bus-powered (5VDC)
- Current Consumption: 200 mA typical, up to 400 mA maximum
- Isolation: Port 2 isolated from USB and Port 1 ground
USB Interface:
- Connector Type: USB Type-B female
- Standard: USB 2.0 compliant
- Controller: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Hot-Pluggable: Supports plug-and-play operation
Serial Interfaces:
- Connector Type: DB9 male connectors (two ports)
- Number of Ports: 2
- Port 1: RS232/RS422/RS485 selectable
- Port 2: Isolated RS422/RS485 selectable
- Signal Pins: TX+, TX−, RX+, RX−, GND
- Control: DIP switch selectable interface type
- Auto Direction Control: Supported in RS485 mode
- Isolation: Port 2 galvanically isolated from USB and Port 1
Environmental Conditions:
- Operating Temperature: 0°C to 55°C
- Storage Temperature: 0°C to 65°C
- Operating Humidity: 10% to 95% RH (non-condensing)
- Storage Humidity: 5% to 95% RH (non-condensing)
### 4. Functionality
Operating Principle:
The UTS301-I converts USB signals from a host computer into serial communication signals (RS232, RS422, or RS485). It enables PCs or embedded systems without native serial ports to interface with industrial devices such as PLCs, sensors, controllers, and communication modules.
Use Cases:
- Industrial automation and control systems
- Data acquisition and monitoring
- POS (Point-of-Sale) systems
- SCADA and remote telemetry
- Laboratory instrumentation
- Serial device networking and diagnostics
Applications:
- Connecting RS232-based legacy equipment to modern USB-only computers
- Isolated RS485 communication in noisy or high-voltage environments
- Multi-protocol serial communication setups requiring flexibility and safety
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems supporting USB CDC or ASIX drivers.
- Works with standard serial communication software and terminal emulators.
- Supports hot-plugging and automatic COM port assignment.
### 5. Components & Accessories
Included Components:
- UTS301-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (for host connection)
- User manual and configuration guide
- DIP switch configuration chart
Optional Accessories:
- TB485 Kit: DB9 Female to RS485 terminal block adapter for easy wiring to RS485 networks.
- Mounting Hardware: Optional brackets for panel or DIN-rail mounting (depending on installation requirements).
Connectors:
- USB Port: Type-B female connector for host connection.
- Serial Ports: Two DB9 male connectors for RS232/RS422/RS485 interfaces.
### 6. Installation & Setup
Requirements:
- Available USB 2.0 port on host computer
- Supported operating system with appropriate driver (ASIX MCS7820)
- USB cable (included)
Mounting Options:
- Desktop placement
- Panel or wall mounting using optional brackets
- DIN-rail mounting (optional accessory)
Configuration:
- DIP Switch Settings:
- Port 1: Select RS232, RS422, or RS485 mode
- Port 2: Select RS422 or RS485 mode
- LED Indicators:
- PWR: Power ON
- Serial1: TXD/RXD activity for Port 1
- Serial2: TXD/RXD activity for Port 2
Setup Procedure:
1. Connect the UTS301-I to the host computer via USB cable.
2. Install the ASIX MCS7820 driver if required.
3. Configure DIP switches for desired serial interface modes.
4. Connect serial devices to the DB9 ports.
5. Verify LED indicators for power and data activity.
6. Begin communication using terminal or control software.
### 7. Performance & Capabilities
Data Handling:
- 512-byte FIFO per port ensures smooth data flow and minimizes buffer overrun.
- Auto Data Direction Control (ADDC) simplifies RS485 half-duplex communication.
Speed & Throughput:
- Supports standard baud rates up to 921.6 kbps (depending on driver and OS support).
- Low latency USB-to-serial conversion for real-time control applications.
Capacity:
- Two independent serial channels in one compact device.
- Supports simultaneous operation of both ports with full isolation on Port 2.
Efficiency:
- Bus-powered operation reduces wiring complexity.
- Compact design minimizes space requirements in control cabinets.
Limitations:
- Port 1 shares ground with USB; not isolated.
- Limited to USB 2.0 data rates (compatible with USB 3.0/3.1 ports in backward mode).
- Requires DIP switch reconfiguration for interface changes.
### 8. Standards & Compliance
Compliance:
- USB 2.0 Specification: Fully compliant with USB 2.0 standard.
- Serial Communication Standards: RS232, RS422, RS485 (EIA/TIA compliant).
- Isolation: Meets industrial isolation standards for RS422/RS485 communication.
- RoHS Compliance: Manufactured in accordance with environmental and safety regulations.
Certifications:
- CE and FCC compliance (typical for Rayon industrial communication products).
- Designed for industrial-grade EMI/EMC performance.
Industry Standards Supported:
- EIA/TIA-232-F (RS232)
- EIA/TIA-422-B (RS422)
- EIA/TIA-485-A (RS485)
### 9. Additional Information
Warranty:
Standard manufacturer warranty (typically 1 year) covering defects in materials and workmanship.
Technical Support:
Rayon Technology provides direct technical support via email. Engineers with over 35 years of experience assist with serial communication integration and troubleshooting.
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to excessive moisture or vibration.
Firmware & Driver Updates:
- Driver updates available from ASIX and Rayon Technology websites.
- EEPROM-based iSerial feature supported on MCS7820 chipset for consistent COM port assignment across USB ports.
iSerial Feature (MCS7820):
The MCS7820 controller supports an optional iSerial feature when a unique serial number is programmed into the EEPROM. This ensures that the same COM port number is retained regardless of which USB port the device is connected to, simplifying multi-port system configurations and avoiding reconfiguration in Windows environments.
Related Models & Upgrade Options:
- UTS111: Single flexible RS232/RS422/RS485 port (non-isolated)
- UTS111-I: Single ground-isolated RS232/RS422/RS485 port
- UTS112 / UTS112-I: Dual-port versions (non-isolated / isolated)
- UTS134 / UTS134i: Four-port RS422/RS485 converters (non-isolated / isolated)
- UTS400 / UTS040: Four-port RS232 converters (non-isolated / isolated)
- UTS485: Two RS232 + two isolated RS422/RS485 ports
- UTS310-I: One isolated RS232 and one flexible RS232/RS422/RS485 port
Product Positioning:
The UTS301-I is positioned as a “less expensive, safe, and flexible” model within Rayon’s USB-to-serial converter lineup. It bridges the gap between cost-effective flexible models and high-end isolated models, offering both configurability and electrical isolation in a single compact unit.
### Summary
The Rayon UTS301-I USB-to-Serial Converter is a robust, dual-port communication interface designed for industrial and professional applications requiring mixed serial standards and electrical isolation. Featuring one configurable RS232/RS422/RS485 port and one ground-isolated RS422/RS485 port, it provides exceptional flexibility for system integrators and engineers. The use of the ASIX MCS7820 chipset ensures reliable USB 2.0 performance, while the 512-byte FIFO buffers and Auto Data Direction Control enhance communication efficiency. Its metal enclosure, LED indicators, and DIP switch configurability make it a durable and user-friendly solution for diverse serial communication environments.
With its combination of safety, flexibility, and cost-effectiveness, the UTS301-I is ideal for industrial automation, control systems, and data communication networks where both isolated and non-isolated serial connections are required.
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UTS301I_Catalog_en.pdf
PDF Catalog
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Why you need UTS301I box.pdf
Manual
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AP_Note_iSerial.pdf
Manual
