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- Dual Isolated Serial Ports: Two independent RS485/RS422 ports with galvanic isolation between USB and serial interfaces, ensuring signal integrity and protection against ground loops.
- USB 2.0 Interface: Fully compliant with USB 2.0 specifications, supporting high-speed data transfer and backward compatibility with USB 1.1.
- ASIX MCS7820 Chipset: High-performance USB-to-serial controller with integrated FIFO buffers for efficient data throughput.
- 512-Byte FIFO per Port: Each serial channel includes a 512-byte transmit/receive buffer, minimizing data loss during high-speed communication.
- Selectable RS485/RS422 Mode: Each port can be independently configured as RS485 or RS422 via DIP switch settings.
- Auto Data Direction Control (RS485): Automatic control of data direction in RS485 mode eliminates the need for manual RTS signal management.
- LED Indicators: Dedicated LEDs for power and per-port TX/RX activity monitoring.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 300–400mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Durable, EMI-resistant housing suitable for industrial environments.
- Compact Design: Space-efficient form factor for desktop or panel installation.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents signal interference.
- Plug-and-Play Functionality: Supports hot-plugging and automatic COM port assignment under Windows and other operating systems.
- USB 2.0 Interface: Fully compliant with USB 2.0 specifications, supporting high-speed data transfer and backward compatibility with USB 1.1.
- ASIX MCS7820 Chipset: High-performance USB-to-serial controller with integrated FIFO buffers for efficient data throughput.
- 512-Byte FIFO per Port: Each serial channel includes a 512-byte transmit/receive buffer, minimizing data loss during high-speed communication.
- Selectable RS485/RS422 Mode: Each port can be independently configured as RS485 or RS422 via DIP switch settings.
- Auto Data Direction Control (RS485): Automatic control of data direction in RS485 mode eliminates the need for manual RTS signal management.
- LED Indicators: Dedicated LEDs for power and per-port TX/RX activity monitoring.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 300–400mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Durable, EMI-resistant housing suitable for industrial environments.
- Compact Design: Space-efficient form factor for desktop or panel installation.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents signal interference.
- Plug-and-Play Functionality: Supports hot-plugging and automatic COM port assignment under Windows and other operating systems.
Comprehensive Product Summary – UTS132-I USB 2.0 to Isolated Dual RS485/RS422 Converter (Bus Power Mode)
### 1. Product Overview
Product Name: UTS132-I
Model: UTS132-I
Series: UTS USB-to-Serial Converter Series
Article Number: UTS132-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 UTS132-I is a USB 2.0 to dual isolated RS485/RS422 converter designed for industrial and professional communication applications requiring electrical isolation and reliable serial data transmission. It integrates two independent, ground-isolated RS485/RS422 ports within a compact metal enclosure and operates in USB bus-powered mode. The device employs the ASIX MCS7820 chipset, providing robust data handling with 512-byte FIFO buffers per serial channel.
### 2. Key Features
- Dual Isolated Serial Ports: Two independent RS485/RS422 ports with galvanic isolation between USB and serial interfaces, ensuring signal integrity and protection against ground loops.
- USB 2.0 Interface: Fully compliant with USB 2.0 specifications, supporting high-speed data transfer and backward compatibility with USB 1.1.
- ASIX MCS7820 Chipset: High-performance USB-to-serial controller with integrated FIFO buffers for efficient data throughput.
- 512-Byte FIFO per Port: Each serial channel includes a 512-byte transmit/receive buffer, minimizing data loss during high-speed communication.
- Selectable RS485/RS422 Mode: Each port can be independently configured as RS485 or RS422 via DIP switch settings.
- Auto Data Direction Control (RS485): Automatic control of data direction in RS485 mode eliminates the need for manual RTS signal management.
- LED Indicators: Dedicated LEDs for power and per-port TX/RX activity monitoring.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 300–400mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Durable, EMI-resistant housing suitable for industrial environments.
- Compact Design: Space-efficient form factor for desktop or panel installation.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents signal interference.
- Plug-and-Play Functionality: Supports hot-plugging and automatic COM port assignment under Windows and other operating systems.
### 3. Technical Specifications
USB Interface:
- Connector Type: USB Type-B female
- Standard: USB 2.0 (Full-Speed, 12 Mbps)
- Controller IC: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Power Source: USB bus-powered (5VDC)
- Current Consumption: 300mA typical, 400mA maximum
Serial Interface (RS485/RS422):
- Connector Type: DB9 male (per port)
- Number of Ports: 2 independent channels (Port 1 and Port 2)
- Interface Type: Selectable RS485 or RS422 via DIP switch
- Signal Pins: TX+, TX–, RX+, RX–, GND
- Isolation: Ground isolation between USB and each serial port
- Auto Direction Control: Supported in RS485 mode
- Termination: Configurable via external wiring or optional terminal block (TB485 accessory)
Indicators:
- PWR LED: Indicates USB power status
- Serial1 LED: TX/RX activity for Port 1
- Serial2 LED: TX/RX activity for Port 2
Power Requirements:
- Input Voltage: 5VDC (from USB bus)
- Current Draw: 300–400mA typical
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
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 industrial gray finish
### 4. Functionality
Operating Principle:
The UTS132-I functions as a USB-to-serial bridge, converting USB 2.0 signals from a host computer into isolated RS485 or RS422 differential signals. Each of the two serial ports operates independently, allowing simultaneous communication with two separate serial devices. The ASIX MCS7820 controller manages data buffering and flow control, ensuring stable and efficient data exchange.
Use Cases and Applications:
- Industrial automation and control systems
- Building management and HVAC monitoring
- SCADA and telemetry systems
- Data acquisition and instrumentation
- Serial device networking and remote monitoring
- POS systems and barcode reader integration
- Communication with PLCs, sensors, and motor controllers
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems supporting USB CDC or virtual COM port drivers.
- Works with standard serial communication software and terminal emulators.
- Supports hot-plugging and automatic COM port assignment.
Isolation Function:
The galvanic isolation between USB and serial ports prevents ground potential differences and electrical noise from affecting communication, enhancing safety and reliability in industrial environments.
### 5. Components & Accessories
Included Components:
- UTS132-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (standard length, typically 1.5 m)
- User manual or quick installation guide
Optional Accessories:
- TB485 Terminal Block Kit: DB9 female to RS485 terminal block adapter for easy field wiring.
- Mounting Brackets: Optional panel or DIN-rail mounting kits (availability may vary).
- USB Extension Cable: For flexible installation distance from host PC.
Connectors:
- USB Port: Type-B female connector for host connection.
- Serial Ports: Two DB9 male connectors for RS485/RS422 devices.
### 6. Installation & Setup
System Requirements:
- Host computer with available USB 2.0 or higher port
- Operating system with USB-to-serial driver support (Windows XP/7/8/10/11, Linux kernel 2.6+, macOS)
- No external power supply required (bus-powered operation)
Installation Steps:
1. Connect the UTS132-I to the host PC using the supplied USB cable.
2. Allow the operating system to detect the device and install the appropriate driver (ASIX MCS7820 driver or generic USB serial driver).
3. Configure each port’s interface type (RS485 or RS422) using the DIP switches located on the device.
4. Connect the serial devices to the DB9 connectors using appropriate cabling or the TB485 terminal block.
5. Verify LED indicators: PWR LED should illuminate, and TX/RX LEDs should blink during data transmission.
Mounting Options:
- Desktop placement for laboratory or office use.
- Panel or wall mounting using optional brackets.
- DIN-rail mounting (with optional adapter) for industrial control cabinets.
Configuration:
- DIP switches allow independent configuration of each port’s communication mode.
- Auto Data Direction Control simplifies RS485 half-duplex communication.
- COM port numbers can be managed through the operating system’s device manager.
### 7. Performance & Capabilities
Data Throughput:
- Supports full-speed USB 2.0 data rates (up to 12 Mbps).
- Serial communication rates typically up to 921.6 kbps (depending on driver and system configuration).
Buffering and Flow Control:
- 512-byte FIFO per port ensures smooth data flow and minimizes latency.
- Hardware and software flow control supported (RTS/CTS, XON/XOFF).
Isolation and Protection:
- Ground isolation between USB and serial ports prevents electrical interference.
- Protection against transient voltage and ground potential differences.
Efficiency:
- Low power consumption (≤400mA) allows operation directly from USB bus.
- No external power adapter required, reducing installation complexity.
Limitations:
- Limited to two serial ports per module.
- RS232 interface not supported (RS485/RS422 only).
- Maximum cable length depends on baud rate and environment (typically up to 1200 m for RS485).
### 8. Standards & Compliance
Electrical and Interface Standards:
- USB 2.0 (Full-Speed) compliant
- EIA/TIA-422 and EIA/TIA-485 compliant for differential serial communication
- Ground isolation per industrial safety standards
Regulatory Compliance:
- CE and FCC Class B (typical for Rayon industrial converters)
- RoHS compliant (lead-free manufacturing)
- ISO 9001:2008 certified production facility (Rayon Technology)
Industry Standards:
- Compatible with Modbus RTU and other serial communication protocols
- Supports standard COM port emulation for legacy software compatibility
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1 year) covering defects in materials and workmanship.
Technical Support:
- Provided by Rayon Technology via email and phone.
- Driver downloads and documentation available on the official website.
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to excessive heat or moisture.
Firmware & Driver Updates:
- ASIX MCS7820 driver updates available for Windows and Linux platforms.
- Firmware updates (if applicable) can be applied via USB interface.
Related Models and Upgrade Options:
- UTS131-I: Single isolated RS422/RS485 port.
- UTS134i: Four isolated RS422/RS485 ports (self-powered).
- UTS111-I: Single isolated RS232/RS422/RS485 port.
- UTS112-I: Dual isolated RS232/RS422/RS485 ports.
- UTS102-I: Dual isolated RS232 ports.
- UTS485: Combination of two RS232 and two isolated RS422/RS485 ports.
iSerial Feature (MCS7820):
The ASIX MCS7820 chipset supports the iSerial feature, allowing each converter to retain consistent COM port numbers across different USB ports when a unique serial number is programmed into the EEPROM. This ensures stable device identification and simplifies multi-port system configurations.
Revision Information:
- Document Revision: 1.1 (Preliminary)
- Date: August 7, 2006
### Summary
The Rayon UTS132-I is a robust, industrial-grade USB 2.0 to dual isolated RS485/RS422 converter designed for reliable serial communication in demanding environments. Featuring the ASIX MCS7820 chipset, dual independent isolated ports, and automatic data direction control, it provides a safe, efficient, and flexible solution for connecting legacy serial devices to modern USB-equipped systems. Its compact metal enclosure, bus-powered operation, and comprehensive LED indicators make it ideal for field deployment, laboratory testing, and industrial automation applications.
With compliance to USB, RS485, and RS422 standards, and support for multiple operating systems, the UTS132-I ensures seamless integration, high data integrity, and long-term operational stability. Optional accessories such as the TB485 terminal block kit further enhance installation flexibility, while related models in the UTS series provide scalability for various port configurations and interface requirements.
In essence, the UTS132-I delivers a balanced combination of safety, performance, and convenience—making it a preferred choice for engineers, system integrators, and industrial automation professionals seeking reliable USB-to-serial connectivity with electrical isolation.
### 1. Product Overview
Product Name: UTS132-I
Model: UTS132-I
Series: UTS USB-to-Serial Converter Series
Article Number: UTS132-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 UTS132-I is a USB 2.0 to dual isolated RS485/RS422 converter designed for industrial and professional communication applications requiring electrical isolation and reliable serial data transmission. It integrates two independent, ground-isolated RS485/RS422 ports within a compact metal enclosure and operates in USB bus-powered mode. The device employs the ASIX MCS7820 chipset, providing robust data handling with 512-byte FIFO buffers per serial channel.
### 2. Key Features
- Dual Isolated Serial Ports: Two independent RS485/RS422 ports with galvanic isolation between USB and serial interfaces, ensuring signal integrity and protection against ground loops.
- USB 2.0 Interface: Fully compliant with USB 2.0 specifications, supporting high-speed data transfer and backward compatibility with USB 1.1.
- ASIX MCS7820 Chipset: High-performance USB-to-serial controller with integrated FIFO buffers for efficient data throughput.
- 512-Byte FIFO per Port: Each serial channel includes a 512-byte transmit/receive buffer, minimizing data loss during high-speed communication.
- Selectable RS485/RS422 Mode: Each port can be independently configured as RS485 or RS422 via DIP switch settings.
- Auto Data Direction Control (RS485): Automatic control of data direction in RS485 mode eliminates the need for manual RTS signal management.
- LED Indicators: Dedicated LEDs for power and per-port TX/RX activity monitoring.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 300–400mA typical), eliminating the need for an external power supply.
- Metal Enclosure: Durable, EMI-resistant housing suitable for industrial environments.
- Compact Design: Space-efficient form factor for desktop or panel installation.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents signal interference.
- Plug-and-Play Functionality: Supports hot-plugging and automatic COM port assignment under Windows and other operating systems.
### 3. Technical Specifications
USB Interface:
- Connector Type: USB Type-B female
- Standard: USB 2.0 (Full-Speed, 12 Mbps)
- Controller IC: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Power Source: USB bus-powered (5VDC)
- Current Consumption: 300mA typical, 400mA maximum
Serial Interface (RS485/RS422):
- Connector Type: DB9 male (per port)
- Number of Ports: 2 independent channels (Port 1 and Port 2)
- Interface Type: Selectable RS485 or RS422 via DIP switch
- Signal Pins: TX+, TX–, RX+, RX–, GND
- Isolation: Ground isolation between USB and each serial port
- Auto Direction Control: Supported in RS485 mode
- Termination: Configurable via external wiring or optional terminal block (TB485 accessory)
Indicators:
- PWR LED: Indicates USB power status
- Serial1 LED: TX/RX activity for Port 1
- Serial2 LED: TX/RX activity for Port 2
Power Requirements:
- Input Voltage: 5VDC (from USB bus)
- Current Draw: 300–400mA typical
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
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 industrial gray finish
### 4. Functionality
Operating Principle:
The UTS132-I functions as a USB-to-serial bridge, converting USB 2.0 signals from a host computer into isolated RS485 or RS422 differential signals. Each of the two serial ports operates independently, allowing simultaneous communication with two separate serial devices. The ASIX MCS7820 controller manages data buffering and flow control, ensuring stable and efficient data exchange.
Use Cases and Applications:
- Industrial automation and control systems
- Building management and HVAC monitoring
- SCADA and telemetry systems
- Data acquisition and instrumentation
- Serial device networking and remote monitoring
- POS systems and barcode reader integration
- Communication with PLCs, sensors, and motor controllers
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems supporting USB CDC or virtual COM port drivers.
- Works with standard serial communication software and terminal emulators.
- Supports hot-plugging and automatic COM port assignment.
Isolation Function:
The galvanic isolation between USB and serial ports prevents ground potential differences and electrical noise from affecting communication, enhancing safety and reliability in industrial environments.
### 5. Components & Accessories
Included Components:
- UTS132-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (standard length, typically 1.5 m)
- User manual or quick installation guide
Optional Accessories:
- TB485 Terminal Block Kit: DB9 female to RS485 terminal block adapter for easy field wiring.
- Mounting Brackets: Optional panel or DIN-rail mounting kits (availability may vary).
- USB Extension Cable: For flexible installation distance from host PC.
Connectors:
- USB Port: Type-B female connector for host connection.
- Serial Ports: Two DB9 male connectors for RS485/RS422 devices.
### 6. Installation & Setup
System Requirements:
- Host computer with available USB 2.0 or higher port
- Operating system with USB-to-serial driver support (Windows XP/7/8/10/11, Linux kernel 2.6+, macOS)
- No external power supply required (bus-powered operation)
Installation Steps:
1. Connect the UTS132-I to the host PC using the supplied USB cable.
2. Allow the operating system to detect the device and install the appropriate driver (ASIX MCS7820 driver or generic USB serial driver).
3. Configure each port’s interface type (RS485 or RS422) using the DIP switches located on the device.
4. Connect the serial devices to the DB9 connectors using appropriate cabling or the TB485 terminal block.
5. Verify LED indicators: PWR LED should illuminate, and TX/RX LEDs should blink during data transmission.
Mounting Options:
- Desktop placement for laboratory or office use.
- Panel or wall mounting using optional brackets.
- DIN-rail mounting (with optional adapter) for industrial control cabinets.
Configuration:
- DIP switches allow independent configuration of each port’s communication mode.
- Auto Data Direction Control simplifies RS485 half-duplex communication.
- COM port numbers can be managed through the operating system’s device manager.
### 7. Performance & Capabilities
Data Throughput:
- Supports full-speed USB 2.0 data rates (up to 12 Mbps).
- Serial communication rates typically up to 921.6 kbps (depending on driver and system configuration).
Buffering and Flow Control:
- 512-byte FIFO per port ensures smooth data flow and minimizes latency.
- Hardware and software flow control supported (RTS/CTS, XON/XOFF).
Isolation and Protection:
- Ground isolation between USB and serial ports prevents electrical interference.
- Protection against transient voltage and ground potential differences.
Efficiency:
- Low power consumption (≤400mA) allows operation directly from USB bus.
- No external power adapter required, reducing installation complexity.
Limitations:
- Limited to two serial ports per module.
- RS232 interface not supported (RS485/RS422 only).
- Maximum cable length depends on baud rate and environment (typically up to 1200 m for RS485).
### 8. Standards & Compliance
Electrical and Interface Standards:
- USB 2.0 (Full-Speed) compliant
- EIA/TIA-422 and EIA/TIA-485 compliant for differential serial communication
- Ground isolation per industrial safety standards
Regulatory Compliance:
- CE and FCC Class B (typical for Rayon industrial converters)
- RoHS compliant (lead-free manufacturing)
- ISO 9001:2008 certified production facility (Rayon Technology)
Industry Standards:
- Compatible with Modbus RTU and other serial communication protocols
- Supports standard COM port emulation for legacy software compatibility
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1 year) covering defects in materials and workmanship.
Technical Support:
- Provided by Rayon Technology via email and phone.
- Driver downloads and documentation available on the official website.
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to excessive heat or moisture.
Firmware & Driver Updates:
- ASIX MCS7820 driver updates available for Windows and Linux platforms.
- Firmware updates (if applicable) can be applied via USB interface.
Related Models and Upgrade Options:
- UTS131-I: Single isolated RS422/RS485 port.
- UTS134i: Four isolated RS422/RS485 ports (self-powered).
- UTS111-I: Single isolated RS232/RS422/RS485 port.
- UTS112-I: Dual isolated RS232/RS422/RS485 ports.
- UTS102-I: Dual isolated RS232 ports.
- UTS485: Combination of two RS232 and two isolated RS422/RS485 ports.
iSerial Feature (MCS7820):
The ASIX MCS7820 chipset supports the iSerial feature, allowing each converter to retain consistent COM port numbers across different USB ports when a unique serial number is programmed into the EEPROM. This ensures stable device identification and simplifies multi-port system configurations.
Revision Information:
- Document Revision: 1.1 (Preliminary)
- Date: August 7, 2006
### Summary
The Rayon UTS132-I is a robust, industrial-grade USB 2.0 to dual isolated RS485/RS422 converter designed for reliable serial communication in demanding environments. Featuring the ASIX MCS7820 chipset, dual independent isolated ports, and automatic data direction control, it provides a safe, efficient, and flexible solution for connecting legacy serial devices to modern USB-equipped systems. Its compact metal enclosure, bus-powered operation, and comprehensive LED indicators make it ideal for field deployment, laboratory testing, and industrial automation applications.
With compliance to USB, RS485, and RS422 standards, and support for multiple operating systems, the UTS132-I ensures seamless integration, high data integrity, and long-term operational stability. Optional accessories such as the TB485 terminal block kit further enhance installation flexibility, while related models in the UTS series provide scalability for various port configurations and interface requirements.
In essence, the UTS132-I delivers a balanced combination of safety, performance, and convenience—making it a preferred choice for engineers, system integrators, and industrial automation professionals seeking reliable USB-to-serial connectivity with electrical isolation.
-
UTS132I_Catalog_en.pdf
PDF Catalog
-
AP_Note_iSerial.pdf
Manual
- TB485 - DB9 Female to RS485 terminal screw block kit
