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- USB 2.0 Device Controller: Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and backward compatibility with USB 1.1 hosts.
- Single Ground-Isolated RS422/RS485 Port: Provides one isolated serial communication channel, selectable between RS422 and RS485 modes via DIP switch.
- ASIX MCS7810 Chipset: Utilizes the ASIX MCS7810 USB-to-serial controller for stable performance and compatibility with major operating systems.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency during high-speed communication.
- Auto Data Direction Control (RS485 Mode): Automatically manages data direction control signals, simplifying RS485 network configuration and reducing software overhead.
- LED Indicators: Dedicated LED indicators for power (PWR) and serial activity (TXD/RXD) provide real-time operational status.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Rigid metal housing provides electromagnetic shielding and mechanical durability suitable for industrial environments.
- Compact Dimensions: Space-efficient design (92mm × 118mm × 27mm) allows easy integration into control panels or instrumentation setups.
- Wide Environmental Tolerance: Operates reliably in temperature ranges from 0°C to 55°C and humidity up to 95% RH.
- Selectable Interface Mode: RS422 or RS485 mode can be configured via onboard DIP switch for flexible deployment.
- Ground Isolation: Electrical isolation between USB and serial interfaces enhances safety and prevents ground loop interference.
- Single Ground-Isolated RS422/RS485 Port: Provides one isolated serial communication channel, selectable between RS422 and RS485 modes via DIP switch.
- ASIX MCS7810 Chipset: Utilizes the ASIX MCS7810 USB-to-serial controller for stable performance and compatibility with major operating systems.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency during high-speed communication.
- Auto Data Direction Control (RS485 Mode): Automatically manages data direction control signals, simplifying RS485 network configuration and reducing software overhead.
- LED Indicators: Dedicated LED indicators for power (PWR) and serial activity (TXD/RXD) provide real-time operational status.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Rigid metal housing provides electromagnetic shielding and mechanical durability suitable for industrial environments.
- Compact Dimensions: Space-efficient design (92mm × 118mm × 27mm) allows easy integration into control panels or instrumentation setups.
- Wide Environmental Tolerance: Operates reliably in temperature ranges from 0°C to 55°C and humidity up to 95% RH.
- Selectable Interface Mode: RS422 or RS485 mode can be configured via onboard DIP switch for flexible deployment.
- Ground Isolation: Electrical isolation between USB and serial interfaces enhances safety and prevents ground loop interference.
Comprehensive Product Summary – UTS131-I USB 2.0 to Isolated RS485/RS422 Converter (Bus Power Mode)
### 1. Product Overview
Product Name: UTS131-I
Model Number: UTS131-I
Series: UTS Series – Ground Isolated USB to Serial Converter Family
Article Number: UTS131-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 UTS131-I is a compact, industrial-grade USB 2.0 to isolated RS485/RS422 converter designed for reliable serial communication in electrically noisy or safety-critical environments. It provides one ground-isolated RS422/RS485 port selectable via DIP switch, ensuring robust data transmission and protection against ground loops. The converter operates in bus-powered mode, drawing power directly from the USB interface, and is housed in a durable metal enclosure for enhanced shielding and mechanical protection.
### 2. Key Features
- USB 2.0 Device Controller: Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and backward compatibility with USB 1.1 hosts.
- Single Ground-Isolated RS422/RS485 Port: Provides one isolated serial communication channel, selectable between RS422 and RS485 modes via DIP switch.
- ASIX MCS7810 Chipset: Utilizes the ASIX MCS7810 USB-to-serial controller for stable performance and compatibility with major operating systems.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency during high-speed communication.
- Auto Data Direction Control (RS485 Mode): Automatically manages data direction control signals, simplifying RS485 network configuration and reducing software overhead.
- LED Indicators: Dedicated LED indicators for power (PWR) and serial activity (TXD/RXD) provide real-time operational status.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Rigid metal housing provides electromagnetic shielding and mechanical durability suitable for industrial environments.
- Compact Dimensions: Space-efficient design (92mm × 118mm × 27mm) allows easy integration into control panels or instrumentation setups.
- Wide Environmental Tolerance: Operates reliably in temperature ranges from 0°C to 55°C and humidity up to 95% RH.
- Selectable Interface Mode: RS422 or RS485 mode can be configured via onboard DIP switch for flexible deployment.
- Ground Isolation: Electrical isolation between USB and serial interfaces enhances safety and prevents ground loop interference.
### 3. Technical Specifications
USB Interface:
- Standard: USB 2.0 (Full-Speed, 12 Mbps)
- Connector Type: USB Type-B female connector
- Controller IC: ASIX MCS7810
- FIFO Buffer: 512 bytes per serial port
- Power Source: USB bus-powered (5VDC)
- Current Consumption: 200mA typical @ 5VDC
RS422/RS485 Interface:
- Connector Type: DB9 male connector
- Number of Ports: 1 isolated port
- Selectable Mode: RS422 or RS485 (via DIP switch)
- Signal Pins: TX+, TX−, RX+, RX−, GND
- Auto Data Direction Control: Supported in RS485 mode
- Isolation: Ground isolation between USB and serial interface
Indicators:
- PWR LED: Indicates DC power input and device readiness
- Serial1 LED: Displays TXD/RXD activity for the serial port
Physical Characteristics:
- Enclosure Material: Metal (EMI-shielded)
- Dimensions: 92 mm (W) × 118 mm (L) × 27 mm (H)
- Weight: Approx. 250–300 g (typical, including enclosure)
- Color: Metallic silver or anodized aluminum finish
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)
Power Requirements:
- Input Voltage: 5VDC (from USB bus)
- Current Draw: 200mA typical, 400mA maximum
### 4. Functionality
Operational Overview:
The UTS131-I functions as a USB-to-serial converter that bridges modern USB interfaces with legacy RS422 or RS485 communication systems. When connected to a host computer via USB, the device enumerates as a virtual COM port, allowing standard serial communication software to interface with industrial equipment, sensors, or controllers.
Mode Selection:
A DIP switch allows users to select between RS422 (full-duplex differential signaling) and RS485 (half-duplex differential signaling) modes. In RS485 mode, the converter automatically manages data direction control, eliminating the need for manual RTS signal handling.
Use Cases and Applications:
- Industrial automation and control systems
- Building management and HVAC control
- SCADA and telemetry systems
- Data acquisition and instrumentation
- Serial communication with PLCs, sensors, and motor drives
- Remote monitoring and diagnostic systems
- Integration of legacy RS422/RS485 devices with modern USB-based PCs or embedded systems
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems (driver support dependent on ASIX MCS7810 chipset).
- Works with standard serial communication software (e.g., HyperTerminal, PuTTY, LabVIEW, or custom applications).
- Supports hot-plugging and automatic device recognition via USB.
### 5. Components & Accessories
Included Components:
- UTS131-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (typically included)
- User manual or quick start guide
Optional Accessories:
- TB485 Kit: DB9 female to RS485 terminal block adapter for easy field wiring.
- Mounting Brackets: Optional panel or DIN-rail mounting accessories (availability may vary).
Connectors:
- USB Port: Type-B female connector for host connection
- Serial Port: DB9 male connector for RS422/RS485 interface
### 6. Installation & Setup
System Requirements:
- Host computer with available USB 2.0 or higher port
- Supported operating system with appropriate driver for ASIX MCS7810
- No external power supply required (bus-powered operation)
Installation Steps:
1. Connect the UTS131-I to the host computer using the supplied USB cable.
2. Install the required driver (if not automatically recognized).
3. Configure the DIP switch to select RS422 or RS485 mode.
4. Connect the serial device to the DB9 male connector using appropriate wiring (TX+/TX−, RX+/RX−, GND).
5. Verify LED indicators: PWR LED should illuminate, and Serial1 LED should blink during data transmission.
6. Configure communication parameters (baud rate, parity, stop bits) in the host software as required.
Mounting Options:
- Desktop or panel mounting using screws or brackets.
- Optional DIN-rail mounting for industrial enclosures.
Configuration:
- DIP switch for interface mode selection (RS422/RS485).
- Auto Data Direction Control eliminates manual configuration for RS485 networks.
### 7. Performance & Capabilities
Data Throughput:
- Supports standard serial communication speeds up to 921.6 kbps (depending on host and driver support).
- 512-byte FIFO buffer per port ensures smooth data flow and minimizes data loss during high-speed transfers.
Isolation & Protection:
- Ground isolation between USB and serial interfaces prevents ground loop interference and protects connected equipment from electrical surges.
- Metal enclosure provides EMI/RFI shielding for stable operation in industrial environments.
Power Efficiency:
- Operates entirely from USB bus power (no external adapter required).
- Typical current draw of 200mA ensures compatibility with standard USB ports.
Limitations:
- Single-port configuration (one RS422/RS485 channel).
- Not designed for RS232 communication (dedicated RS232 models available in the UTS series).
- Requires driver installation for certain operating systems.
### 8. Standards & Compliance
Compliance and Certifications:
- USB 2.0 Specification: Fully compliant with USB 2.0 standard.
- EMC/EMI Compliance: Designed with metal shielding to meet industrial electromagnetic compatibility requirements.
- Safety: Ground isolation ensures compliance with industrial safety standards for serial communication.
- RoHS Compliance: Manufactured using lead-free and environmentally safe materials (subject to manufacturer confirmation).
Industry Standards Supported:
- EIA/TIA-422 (RS422)
- EIA/TIA-485 (RS485)
- USB 2.0 (Full-Speed)
Regulatory Notes:
- Designed for use in industrial and commercial environments.
- Meets general CE and FCC requirements for USB communication devices (based on manufacturer’s product line compliance).
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1 year, subject to regional policy).
- Covers defects in materials and workmanship under normal use.
Technical Support:
- Provided by RAYON TECHNOLOGY CO., LTD. via email or phone.
- Online resources and driver downloads available at [www.rayontech.com.tw](http://www.rayontech.com.tw).
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust or corrosion.
- Avoid exposure to excessive moisture or vibration.
Firmware & Driver Updates:
- Drivers and firmware updates available through the manufacturer’s website.
- Compatible with ASIX MCS7810 driver packages for Windows and Linux.
Related Models in the UTS Series:
- UTS101-I: USB to one isolated RS232 port (bus-powered).
- UTS132-I: USB to two isolated RS422/RS485 ports.
- UTS134i: USB to four isolated RS422/RS485 ports (self-powered).
- UTS111: USB to one RS232/RS422/RS485 port (non-isolated).
- UTS112-I: USB to two isolated RS232/RS422/RS485 ports.
- UTS400: USB to four RS232 ports (cost-effective model).
- UTS485: USB to two RS232 and two isolated RS422/RS485 ports.
Product Positioning:
The UTS131-I is part of Rayon’s “Safety Model” line, emphasizing electrical isolation and reliability for industrial and automation applications. It offers a balance between cost efficiency and safety, making it ideal for environments where ground isolation is critical but only a single serial channel is required.
### Summary
The RAYON UTS131-I USB 2.0 to Isolated RS485/RS422 Converter is a robust, compact, and reliable communication interface designed for industrial and automation systems requiring isolated serial connectivity. Featuring the ASIX MCS7810 controller, a 512-byte FIFO buffer, and automatic data direction control, it ensures efficient and stable data transmission between USB-equipped hosts and RS422/RS485 devices. Its ground isolation, metal enclosure, and bus-powered design make it a safe and convenient solution for field installations, monitoring systems, and control networks.
With flexible configuration, LED status indicators, and compatibility across major operating systems, the UTS131-I provides a dependable bridge between modern computing platforms and legacy serial communication infrastructure—delivering both safety and performance in a single, cost-effective module.
### 1. Product Overview
Product Name: UTS131-I
Model Number: UTS131-I
Series: UTS Series – Ground Isolated USB to Serial Converter Family
Article Number: UTS131-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 UTS131-I is a compact, industrial-grade USB 2.0 to isolated RS485/RS422 converter designed for reliable serial communication in electrically noisy or safety-critical environments. It provides one ground-isolated RS422/RS485 port selectable via DIP switch, ensuring robust data transmission and protection against ground loops. The converter operates in bus-powered mode, drawing power directly from the USB interface, and is housed in a durable metal enclosure for enhanced shielding and mechanical protection.
### 2. Key Features
- USB 2.0 Device Controller: Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and backward compatibility with USB 1.1 hosts.
- Single Ground-Isolated RS422/RS485 Port: Provides one isolated serial communication channel, selectable between RS422 and RS485 modes via DIP switch.
- ASIX MCS7810 Chipset: Utilizes the ASIX MCS7810 USB-to-serial controller for stable performance and compatibility with major operating systems.
- 512-Byte FIFO Buffer: Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced latency during high-speed communication.
- Auto Data Direction Control (RS485 Mode): Automatically manages data direction control signals, simplifying RS485 network configuration and reducing software overhead.
- LED Indicators: Dedicated LED indicators for power (PWR) and serial activity (TXD/RXD) provide real-time operational status.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 200mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Rigid metal housing provides electromagnetic shielding and mechanical durability suitable for industrial environments.
- Compact Dimensions: Space-efficient design (92mm × 118mm × 27mm) allows easy integration into control panels or instrumentation setups.
- Wide Environmental Tolerance: Operates reliably in temperature ranges from 0°C to 55°C and humidity up to 95% RH.
- Selectable Interface Mode: RS422 or RS485 mode can be configured via onboard DIP switch for flexible deployment.
- Ground Isolation: Electrical isolation between USB and serial interfaces enhances safety and prevents ground loop interference.
### 3. Technical Specifications
USB Interface:
- Standard: USB 2.0 (Full-Speed, 12 Mbps)
- Connector Type: USB Type-B female connector
- Controller IC: ASIX MCS7810
- FIFO Buffer: 512 bytes per serial port
- Power Source: USB bus-powered (5VDC)
- Current Consumption: 200mA typical @ 5VDC
RS422/RS485 Interface:
- Connector Type: DB9 male connector
- Number of Ports: 1 isolated port
- Selectable Mode: RS422 or RS485 (via DIP switch)
- Signal Pins: TX+, TX−, RX+, RX−, GND
- Auto Data Direction Control: Supported in RS485 mode
- Isolation: Ground isolation between USB and serial interface
Indicators:
- PWR LED: Indicates DC power input and device readiness
- Serial1 LED: Displays TXD/RXD activity for the serial port
Physical Characteristics:
- Enclosure Material: Metal (EMI-shielded)
- Dimensions: 92 mm (W) × 118 mm (L) × 27 mm (H)
- Weight: Approx. 250–300 g (typical, including enclosure)
- Color: Metallic silver or anodized aluminum finish
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)
Power Requirements:
- Input Voltage: 5VDC (from USB bus)
- Current Draw: 200mA typical, 400mA maximum
### 4. Functionality
Operational Overview:
The UTS131-I functions as a USB-to-serial converter that bridges modern USB interfaces with legacy RS422 or RS485 communication systems. When connected to a host computer via USB, the device enumerates as a virtual COM port, allowing standard serial communication software to interface with industrial equipment, sensors, or controllers.
Mode Selection:
A DIP switch allows users to select between RS422 (full-duplex differential signaling) and RS485 (half-duplex differential signaling) modes. In RS485 mode, the converter automatically manages data direction control, eliminating the need for manual RTS signal handling.
Use Cases and Applications:
- Industrial automation and control systems
- Building management and HVAC control
- SCADA and telemetry systems
- Data acquisition and instrumentation
- Serial communication with PLCs, sensors, and motor drives
- Remote monitoring and diagnostic systems
- Integration of legacy RS422/RS485 devices with modern USB-based PCs or embedded systems
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems (driver support dependent on ASIX MCS7810 chipset).
- Works with standard serial communication software (e.g., HyperTerminal, PuTTY, LabVIEW, or custom applications).
- Supports hot-plugging and automatic device recognition via USB.
### 5. Components & Accessories
Included Components:
- UTS131-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (typically included)
- User manual or quick start guide
Optional Accessories:
- TB485 Kit: DB9 female to RS485 terminal block adapter for easy field wiring.
- Mounting Brackets: Optional panel or DIN-rail mounting accessories (availability may vary).
Connectors:
- USB Port: Type-B female connector for host connection
- Serial Port: DB9 male connector for RS422/RS485 interface
### 6. Installation & Setup
System Requirements:
- Host computer with available USB 2.0 or higher port
- Supported operating system with appropriate driver for ASIX MCS7810
- No external power supply required (bus-powered operation)
Installation Steps:
1. Connect the UTS131-I to the host computer using the supplied USB cable.
2. Install the required driver (if not automatically recognized).
3. Configure the DIP switch to select RS422 or RS485 mode.
4. Connect the serial device to the DB9 male connector using appropriate wiring (TX+/TX−, RX+/RX−, GND).
5. Verify LED indicators: PWR LED should illuminate, and Serial1 LED should blink during data transmission.
6. Configure communication parameters (baud rate, parity, stop bits) in the host software as required.
Mounting Options:
- Desktop or panel mounting using screws or brackets.
- Optional DIN-rail mounting for industrial enclosures.
Configuration:
- DIP switch for interface mode selection (RS422/RS485).
- Auto Data Direction Control eliminates manual configuration for RS485 networks.
### 7. Performance & Capabilities
Data Throughput:
- Supports standard serial communication speeds up to 921.6 kbps (depending on host and driver support).
- 512-byte FIFO buffer per port ensures smooth data flow and minimizes data loss during high-speed transfers.
Isolation & Protection:
- Ground isolation between USB and serial interfaces prevents ground loop interference and protects connected equipment from electrical surges.
- Metal enclosure provides EMI/RFI shielding for stable operation in industrial environments.
Power Efficiency:
- Operates entirely from USB bus power (no external adapter required).
- Typical current draw of 200mA ensures compatibility with standard USB ports.
Limitations:
- Single-port configuration (one RS422/RS485 channel).
- Not designed for RS232 communication (dedicated RS232 models available in the UTS series).
- Requires driver installation for certain operating systems.
### 8. Standards & Compliance
Compliance and Certifications:
- USB 2.0 Specification: Fully compliant with USB 2.0 standard.
- EMC/EMI Compliance: Designed with metal shielding to meet industrial electromagnetic compatibility requirements.
- Safety: Ground isolation ensures compliance with industrial safety standards for serial communication.
- RoHS Compliance: Manufactured using lead-free and environmentally safe materials (subject to manufacturer confirmation).
Industry Standards Supported:
- EIA/TIA-422 (RS422)
- EIA/TIA-485 (RS485)
- USB 2.0 (Full-Speed)
Regulatory Notes:
- Designed for use in industrial and commercial environments.
- Meets general CE and FCC requirements for USB communication devices (based on manufacturer’s product line compliance).
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1 year, subject to regional policy).
- Covers defects in materials and workmanship under normal use.
Technical Support:
- Provided by RAYON TECHNOLOGY CO., LTD. via email or phone.
- Online resources and driver downloads available at [www.rayontech.com.tw](http://www.rayontech.com.tw).
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust or corrosion.
- Avoid exposure to excessive moisture or vibration.
Firmware & Driver Updates:
- Drivers and firmware updates available through the manufacturer’s website.
- Compatible with ASIX MCS7810 driver packages for Windows and Linux.
Related Models in the UTS Series:
- UTS101-I: USB to one isolated RS232 port (bus-powered).
- UTS132-I: USB to two isolated RS422/RS485 ports.
- UTS134i: USB to four isolated RS422/RS485 ports (self-powered).
- UTS111: USB to one RS232/RS422/RS485 port (non-isolated).
- UTS112-I: USB to two isolated RS232/RS422/RS485 ports.
- UTS400: USB to four RS232 ports (cost-effective model).
- UTS485: USB to two RS232 and two isolated RS422/RS485 ports.
Product Positioning:
The UTS131-I is part of Rayon’s “Safety Model” line, emphasizing electrical isolation and reliability for industrial and automation applications. It offers a balance between cost efficiency and safety, making it ideal for environments where ground isolation is critical but only a single serial channel is required.
### Summary
The RAYON UTS131-I USB 2.0 to Isolated RS485/RS422 Converter is a robust, compact, and reliable communication interface designed for industrial and automation systems requiring isolated serial connectivity. Featuring the ASIX MCS7810 controller, a 512-byte FIFO buffer, and automatic data direction control, it ensures efficient and stable data transmission between USB-equipped hosts and RS422/RS485 devices. Its ground isolation, metal enclosure, and bus-powered design make it a safe and convenient solution for field installations, monitoring systems, and control networks.
With flexible configuration, LED status indicators, and compatibility across major operating systems, the UTS131-I provides a dependable bridge between modern computing platforms and legacy serial communication infrastructure—delivering both safety and performance in a single, cost-effective module.
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UTS131I_Catalog_en.pdf
PDF Catalog
-
AP_Note_iSerial.pdf
Manual
