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- Dual Isolated Serial Ports: Two independent, ground-isolated serial channels configurable as RS232, RS422, or RS485.
- USB 2.0 Interface: Compliant with USB 2.0 full-speed specifications for broad compatibility with modern systems.
- ASIX MCS7820 Controller: High-performance USB-to-serial bridge chip with integrated FIFO and iSerial support.
- 512-Byte FIFO per Port: Large buffer memory per channel ensures smooth data flow and minimizes latency.
- Auto Data Direction Control: Automatic transmit/receive switching in RS485 mode for simplified half-duplex communication.
- 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).
- Metal Enclosure: Durable, EMI-resistant housing for industrial environments.
- Flexible Configuration: DIP switch selection for RS232 or RS422/RS485 operation per port.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents ground loops.
- Compact Design: Space-efficient form factor suitable for desktop or panel mounting.
- Plug-and-Play Installation: No external power supply required in bus-powered mode; supports hot-plugging.
- EEPROM iSerial Feature: Retains consistent COM port assignments across USB ports when programmed with unique serial numbers.
- Wide Environmental Range: Operates reliably from 0°C to 55°C with up to 95% relative humidity.
- USB 2.0 Interface: Compliant with USB 2.0 full-speed specifications for broad compatibility with modern systems.
- ASIX MCS7820 Controller: High-performance USB-to-serial bridge chip with integrated FIFO and iSerial support.
- 512-Byte FIFO per Port: Large buffer memory per channel ensures smooth data flow and minimizes latency.
- Auto Data Direction Control: Automatic transmit/receive switching in RS485 mode for simplified half-duplex communication.
- 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).
- Metal Enclosure: Durable, EMI-resistant housing for industrial environments.
- Flexible Configuration: DIP switch selection for RS232 or RS422/RS485 operation per port.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents ground loops.
- Compact Design: Space-efficient form factor suitable for desktop or panel mounting.
- Plug-and-Play Installation: No external power supply required in bus-powered mode; supports hot-plugging.
- EEPROM iSerial Feature: Retains consistent COM port assignments across USB ports when programmed with unique serial numbers.
- Wide Environmental Range: Operates reliably from 0°C to 55°C with up to 95% relative humidity.
Comprehensive Product Summary – UTS112-I USB 2.0 to Isolated Dual RS232/RS422/RS485 Converter
### 1. Product Overview
Product Name: UTS112-I
Model: UTS112-I
Series: UTS Flexible and Isolated USB-to-Serial Converter Series
Article Number: UTS112-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 / infor@rayontech.com.tw
- Web: [www.rayontec.com.tw](http://www.rayontec.com.tw), [www.rayontech.com](http://www.rayontech.com)
Product Description:
The UTS112-I is a USB 2.0 to dual isolated RS232/RS422/RS485 converter module designed for industrial, laboratory, and automation applications requiring reliable, noise-immune serial communication. It integrates two fully isolated serial ports within a compact metal enclosure, providing flexible configuration via DIP switches for RS232, RS422, or RS485 operation. The device is bus-powered through the USB interface and supports self-powered operation when an external 5VDC supply is available. Built around the ASIX MCS7820 USB-to-serial controller, the UTS112-I ensures stable, high-performance data transfer with 512-byte FIFO buffers per port and automatic data direction control in RS485 mode.
### 2. Key Features
- Dual Isolated Serial Ports: Two independent, ground-isolated serial channels configurable as RS232, RS422, or RS485.
- USB 2.0 Interface: Compliant with USB 2.0 full-speed specifications for broad compatibility with modern systems.
- ASIX MCS7820 Controller: High-performance USB-to-serial bridge chip with integrated FIFO and iSerial support.
- 512-Byte FIFO per Port: Large buffer memory per channel ensures smooth data flow and minimizes latency.
- Auto Data Direction Control: Automatic transmit/receive switching in RS485 mode for simplified half-duplex communication.
- 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).
- Metal Enclosure: Durable, EMI-resistant housing for industrial environments.
- Flexible Configuration: DIP switch selection for RS232 or RS422/RS485 operation per port.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents ground loops.
- Compact Design: Space-efficient form factor suitable for desktop or panel mounting.
- Plug-and-Play Installation: No external power supply required in bus-powered mode; supports hot-plugging.
- EEPROM iSerial Feature: Retains consistent COM port assignments across USB ports when programmed with unique serial numbers.
- Wide Environmental Range: Operates reliably from 0°C to 55°C with up to 95% relative humidity.
### 3. Technical Specifications
USB Interface:
- Standard: USB 2.0 Full-Speed (12 Mbps)
- Connector Type: USB Type-B female
- Controller IC: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Power Source: USB bus-powered (5VDC, 300–400mA typical)
- Optional Power Input: External 5VDC supply supported for self-powered operation
Serial Interface (RS232/RS422/RS485):
- Number of Ports: 2 independent channels
- Connector Type: DB9 male connectors
- Interface Selection: Configurable via DIP switches (RS232 or RS422/RS485)
- Signal Pins (RS422/RS485): TX+, TX−, RX+, RX−, GND
- Auto Direction Control: Supported in RS485 mode
- Isolation: Ground isolation between USB and serial ports
Indicators:
- PWR LED: Indicates DC power presence
- Serial1 LED: TXD/RXD activity for Port 1
- Serial2 LED: TXD/RXD activity for Port 2
Power Requirements:
- Input Voltage: 5VDC (USB bus or external supply)
- Current Consumption: 300mA typical @ 5VDC
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 and connectors)
- Color: Metallic gray or anodized aluminum finish
### 4. Functionality
The UTS112-I functions as a dual-port USB-to-serial converter, bridging USB communication from a host computer to isolated serial devices. Each port can be independently configured as RS232, RS422, or RS485 using onboard DIP switches. The device automatically detects and manages data direction in RS485 mode, eliminating the need for manual control signals.
Typical Use Cases:
- Industrial automation systems requiring isolated serial communication
- SCADA and PLC interfacing
- Laboratory instrumentation and data acquisition
- POS (Point-of-Sale) systems and barcode reader integration
- Communication with legacy serial equipment via modern USB interfaces
- Remote monitoring and control systems
- Embedded system debugging and serial console access
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems supporting USB CDC or vendor-specific drivers.
- Works with standard terminal software and industrial communication protocols (Modbus RTU, ASCII, etc.).
- Supports hot-plugging and automatic COM port assignment.
Operation Modes:
- RS232 Mode: Full-duplex communication with standard signal levels.
- RS422 Mode: Differential full-duplex communication for long-distance, noise-immune data transfer.
- RS485 Mode: Differential half-duplex communication with automatic direction control.
### 5. Components & Accessories
Included Components:
- UTS112-I converter module (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.
- External 5VDC Power Adapter: For self-powered operation when USB power is insufficient.
- Mounting Brackets: Optional for panel or DIN-rail installation.
Connectors:
- USB Port: Type-B female connector for host connection.
- Serial Ports: Two DB9 male connectors for RS232/RS422/RS485 interfaces.
- Power Jack (optional): For external 5VDC input (if supported).
### 6. Installation & Setup
System Requirements:
- Host computer with available USB 2.0 or higher port
- Supported operating system (Windows, Linux, macOS)
- Driver installation (if required for specific OS versions)
Installation Steps:
1. Connect the UTS112-I to the host computer using the supplied USB cable.
2. Allow the operating system to detect and install the appropriate driver (ASIX MCS7820-based).
3. Configure each serial port using DIP switches to select RS232 or RS422/RS485 mode.
4. Connect serial devices to the DB9 connectors.
5. Verify LED indicators for power and communication activity.
Mounting Options:
- Desktop placement for laboratory or office use.
- Panel or wall mounting using optional brackets.
- DIN-rail mounting (with accessory kit).
Configuration:
- DIP switches located on the device allow per-port selection of interface type.
- RS485 mode automatically manages data direction; no software configuration required.
- COM port numbers can be fixed using the iSerial feature (EEPROM programming).
### 7. Performance & Capabilities
Data Throughput:
- USB 2.0 full-speed (12 Mbps) interface bandwidth
- High-speed serial communication up to standard RS232/RS422/RS485 limits (typically up to 921.6 kbps depending on driver and system configuration)
Buffering:
- 512-byte FIFO per port ensures smooth data flow and minimizes overrun errors.
Isolation Performance:
- Electrical isolation between USB and serial ports prevents ground loops and protects host equipment from voltage surges.
Power Efficiency:
- Operates efficiently in bus-powered mode with low current draw (300–400mA).
- Optional self-powered mode allows stable operation with multiple high-load serial devices.
Reliability:
- Industrial-grade metal enclosure provides mechanical protection and EMI shielding.
- LED indicators enable quick diagnostics of power and communication status.
Limitations:
- Limited to two serial ports per module.
- RS485 mode supports half-duplex communication only.
- Requires DIP switch configuration for interface selection (no software switching).
### 8. Standards & Compliance
Interface Standards:
- USB 2.0 Full-Speed compliant
- RS232 (EIA/TIA-232), RS422 (EIA/TIA-422), RS485 (EIA/TIA-485) compliant
Electrical & Safety:
- Ground isolation between USB and serial ports for enhanced safety
- Designed for industrial EMC environments
Regulatory Compliance:
- CE and FCC Class B (typical for Rayon products; confirm per shipment)
- RoHS compliant (lead-free construction)
Industry Standards Supported:
- Modbus RTU/ASCII
- Generic serial communication protocols
- Compatible with standard COM port drivers and APIs
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1 year; confirm with distributor).
Technical Support:
- Provided by Rayon Technology via email or phone.
- Driver downloads and documentation available on the manufacturer’s website.
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to moisture or corrosive environments.
Firmware & Driver Updates:
- ASIX MCS7820 drivers available for Windows, Linux, and macOS.
- EEPROM can be programmed with unique serial numbers to enable iSerial functionality, ensuring consistent COM port assignments across USB ports.
Related Models and Upgrade Options:
- UTS111: Single-port flexible RS232/RS422/RS485 converter (non-isolated).
- UTS111-I: Single-port isolated RS232/RS422/RS485 converter.
- UTS112: Dual-port flexible RS232/RS422/RS485 converter (non-isolated).
- UTS132-I: Dual-port isolated RS422/RS485 converter.
- UTS134i: Four-port isolated RS422/RS485 converter (self-powered).
- UTS400: Four-port RS232 converter (cost-effective model).
- UTS040: Four-port isolated RS232 converter (safety model).
- UTS485: Mixed dual RS232 and dual isolated RS422/RS485 converter.
iSerial Feature (MCS7820/MCS7840):
The MCS7820 controller supports an optional iSerial feature when a unique serial number is programmed into its EEPROM. This ensures that each converter retains the same COM port number regardless of which USB port it is connected to on the host system. This capability simplifies system integration and eliminates the need for manual COM port reassignment in multi-port or multi-device environments.
Revision Information:
- Document Revision: 1.1 (Preliminary)
- Date: August 7, 2006
### Summary
The UTS112-I from Rayon Technology Co., Ltd. is a robust, dual-port USB-to-serial converter engineered for industrial and professional applications requiring electrical isolation and flexible serial communication. Featuring the ASIX MCS7820 controller, 512-byte FIFO buffers, and automatic RS485 direction control, it delivers reliable, high-performance data transfer across RS232, RS422, and RS485 interfaces. Its metal enclosure, LED indicators, and DIP switch configurability make it both durable and user-friendly. With support for USB bus power, optional self-powering, and the iSerial feature for consistent COM port mapping, the UTS112-I provides a versatile and dependable solution for connecting legacy serial devices to modern USB-equipped systems.
### 1. Product Overview
Product Name: UTS112-I
Model: UTS112-I
Series: UTS Flexible and Isolated USB-to-Serial Converter Series
Article Number: UTS112-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 / infor@rayontech.com.tw
- Web: [www.rayontec.com.tw](http://www.rayontec.com.tw), [www.rayontech.com](http://www.rayontech.com)
Product Description:
The UTS112-I is a USB 2.0 to dual isolated RS232/RS422/RS485 converter module designed for industrial, laboratory, and automation applications requiring reliable, noise-immune serial communication. It integrates two fully isolated serial ports within a compact metal enclosure, providing flexible configuration via DIP switches for RS232, RS422, or RS485 operation. The device is bus-powered through the USB interface and supports self-powered operation when an external 5VDC supply is available. Built around the ASIX MCS7820 USB-to-serial controller, the UTS112-I ensures stable, high-performance data transfer with 512-byte FIFO buffers per port and automatic data direction control in RS485 mode.
### 2. Key Features
- Dual Isolated Serial Ports: Two independent, ground-isolated serial channels configurable as RS232, RS422, or RS485.
- USB 2.0 Interface: Compliant with USB 2.0 full-speed specifications for broad compatibility with modern systems.
- ASIX MCS7820 Controller: High-performance USB-to-serial bridge chip with integrated FIFO and iSerial support.
- 512-Byte FIFO per Port: Large buffer memory per channel ensures smooth data flow and minimizes latency.
- Auto Data Direction Control: Automatic transmit/receive switching in RS485 mode for simplified half-duplex communication.
- 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).
- Metal Enclosure: Durable, EMI-resistant housing for industrial environments.
- Flexible Configuration: DIP switch selection for RS232 or RS422/RS485 operation per port.
- Ground Isolation: Electrical isolation between USB and serial ports enhances safety and prevents ground loops.
- Compact Design: Space-efficient form factor suitable for desktop or panel mounting.
- Plug-and-Play Installation: No external power supply required in bus-powered mode; supports hot-plugging.
- EEPROM iSerial Feature: Retains consistent COM port assignments across USB ports when programmed with unique serial numbers.
- Wide Environmental Range: Operates reliably from 0°C to 55°C with up to 95% relative humidity.
### 3. Technical Specifications
USB Interface:
- Standard: USB 2.0 Full-Speed (12 Mbps)
- Connector Type: USB Type-B female
- Controller IC: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Power Source: USB bus-powered (5VDC, 300–400mA typical)
- Optional Power Input: External 5VDC supply supported for self-powered operation
Serial Interface (RS232/RS422/RS485):
- Number of Ports: 2 independent channels
- Connector Type: DB9 male connectors
- Interface Selection: Configurable via DIP switches (RS232 or RS422/RS485)
- Signal Pins (RS422/RS485): TX+, TX−, RX+, RX−, GND
- Auto Direction Control: Supported in RS485 mode
- Isolation: Ground isolation between USB and serial ports
Indicators:
- PWR LED: Indicates DC power presence
- Serial1 LED: TXD/RXD activity for Port 1
- Serial2 LED: TXD/RXD activity for Port 2
Power Requirements:
- Input Voltage: 5VDC (USB bus or external supply)
- Current Consumption: 300mA typical @ 5VDC
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 and connectors)
- Color: Metallic gray or anodized aluminum finish
### 4. Functionality
The UTS112-I functions as a dual-port USB-to-serial converter, bridging USB communication from a host computer to isolated serial devices. Each port can be independently configured as RS232, RS422, or RS485 using onboard DIP switches. The device automatically detects and manages data direction in RS485 mode, eliminating the need for manual control signals.
Typical Use Cases:
- Industrial automation systems requiring isolated serial communication
- SCADA and PLC interfacing
- Laboratory instrumentation and data acquisition
- POS (Point-of-Sale) systems and barcode reader integration
- Communication with legacy serial equipment via modern USB interfaces
- Remote monitoring and control systems
- Embedded system debugging and serial console access
Compatibility:
- Compatible with Windows, Linux, and macOS operating systems supporting USB CDC or vendor-specific drivers.
- Works with standard terminal software and industrial communication protocols (Modbus RTU, ASCII, etc.).
- Supports hot-plugging and automatic COM port assignment.
Operation Modes:
- RS232 Mode: Full-duplex communication with standard signal levels.
- RS422 Mode: Differential full-duplex communication for long-distance, noise-immune data transfer.
- RS485 Mode: Differential half-duplex communication with automatic direction control.
### 5. Components & Accessories
Included Components:
- UTS112-I converter module (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.
- External 5VDC Power Adapter: For self-powered operation when USB power is insufficient.
- Mounting Brackets: Optional for panel or DIN-rail installation.
Connectors:
- USB Port: Type-B female connector for host connection.
- Serial Ports: Two DB9 male connectors for RS232/RS422/RS485 interfaces.
- Power Jack (optional): For external 5VDC input (if supported).
### 6. Installation & Setup
System Requirements:
- Host computer with available USB 2.0 or higher port
- Supported operating system (Windows, Linux, macOS)
- Driver installation (if required for specific OS versions)
Installation Steps:
1. Connect the UTS112-I to the host computer using the supplied USB cable.
2. Allow the operating system to detect and install the appropriate driver (ASIX MCS7820-based).
3. Configure each serial port using DIP switches to select RS232 or RS422/RS485 mode.
4. Connect serial devices to the DB9 connectors.
5. Verify LED indicators for power and communication activity.
Mounting Options:
- Desktop placement for laboratory or office use.
- Panel or wall mounting using optional brackets.
- DIN-rail mounting (with accessory kit).
Configuration:
- DIP switches located on the device allow per-port selection of interface type.
- RS485 mode automatically manages data direction; no software configuration required.
- COM port numbers can be fixed using the iSerial feature (EEPROM programming).
### 7. Performance & Capabilities
Data Throughput:
- USB 2.0 full-speed (12 Mbps) interface bandwidth
- High-speed serial communication up to standard RS232/RS422/RS485 limits (typically up to 921.6 kbps depending on driver and system configuration)
Buffering:
- 512-byte FIFO per port ensures smooth data flow and minimizes overrun errors.
Isolation Performance:
- Electrical isolation between USB and serial ports prevents ground loops and protects host equipment from voltage surges.
Power Efficiency:
- Operates efficiently in bus-powered mode with low current draw (300–400mA).
- Optional self-powered mode allows stable operation with multiple high-load serial devices.
Reliability:
- Industrial-grade metal enclosure provides mechanical protection and EMI shielding.
- LED indicators enable quick diagnostics of power and communication status.
Limitations:
- Limited to two serial ports per module.
- RS485 mode supports half-duplex communication only.
- Requires DIP switch configuration for interface selection (no software switching).
### 8. Standards & Compliance
Interface Standards:
- USB 2.0 Full-Speed compliant
- RS232 (EIA/TIA-232), RS422 (EIA/TIA-422), RS485 (EIA/TIA-485) compliant
Electrical & Safety:
- Ground isolation between USB and serial ports for enhanced safety
- Designed for industrial EMC environments
Regulatory Compliance:
- CE and FCC Class B (typical for Rayon products; confirm per shipment)
- RoHS compliant (lead-free construction)
Industry Standards Supported:
- Modbus RTU/ASCII
- Generic serial communication protocols
- Compatible with standard COM port drivers and APIs
### 9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1 year; confirm with distributor).
Technical Support:
- Provided by Rayon Technology via email or phone.
- Driver downloads and documentation available on the manufacturer’s website.
Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to moisture or corrosive environments.
Firmware & Driver Updates:
- ASIX MCS7820 drivers available for Windows, Linux, and macOS.
- EEPROM can be programmed with unique serial numbers to enable iSerial functionality, ensuring consistent COM port assignments across USB ports.
Related Models and Upgrade Options:
- UTS111: Single-port flexible RS232/RS422/RS485 converter (non-isolated).
- UTS111-I: Single-port isolated RS232/RS422/RS485 converter.
- UTS112: Dual-port flexible RS232/RS422/RS485 converter (non-isolated).
- UTS132-I: Dual-port isolated RS422/RS485 converter.
- UTS134i: Four-port isolated RS422/RS485 converter (self-powered).
- UTS400: Four-port RS232 converter (cost-effective model).
- UTS040: Four-port isolated RS232 converter (safety model).
- UTS485: Mixed dual RS232 and dual isolated RS422/RS485 converter.
iSerial Feature (MCS7820/MCS7840):
The MCS7820 controller supports an optional iSerial feature when a unique serial number is programmed into its EEPROM. This ensures that each converter retains the same COM port number regardless of which USB port it is connected to on the host system. This capability simplifies system integration and eliminates the need for manual COM port reassignment in multi-port or multi-device environments.
Revision Information:
- Document Revision: 1.1 (Preliminary)
- Date: August 7, 2006
### Summary
The UTS112-I from Rayon Technology Co., Ltd. is a robust, dual-port USB-to-serial converter engineered for industrial and professional applications requiring electrical isolation and flexible serial communication. Featuring the ASIX MCS7820 controller, 512-byte FIFO buffers, and automatic RS485 direction control, it delivers reliable, high-performance data transfer across RS232, RS422, and RS485 interfaces. Its metal enclosure, LED indicators, and DIP switch configurability make it both durable and user-friendly. With support for USB bus power, optional self-powering, and the iSerial feature for consistent COM port mapping, the UTS112-I provides a versatile and dependable solution for connecting legacy serial devices to modern USB-equipped systems.
-
UTS112I_Catalog_en.pdf
PDF Catalog
-
AP_Note_iSerial.pdf
Manual
- TB485 - DB9 Female to RS485 terminal screw block kit
