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UTS310-I

USB to 1*RS232/485 and isol. 1*RS232 Conv. Bus Power Mode
  • Manufacturer Rayon
  • Category: USB RS232 Converter
  • The RAYON UTS310-I is a dual-port USB-to-serial converter designed to provide flexible and safe serial communication interfaces for industrial, commercial, and embedded applications. It integrates one configurable RS232/RS422/RS485 port and one ground-isolated RS232 port within a compact, metal-encased module. The device operates in USB bus-powered mode and is built around the ASIX MCS7820 chipset, offering reliable data transfer with 512-byte FIFO buffers per port.
- Dual-Port Design:
Provides two independent serial communication ports in one compact enclosure:
- Port 1: Configurable RS232/RS422/RS485 interface
- Port 2: Ground-isolated RS232 interface for safety-critical applications

- USB 2.0 Interface:
Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and plug-and-play compatibility with modern systems.

- ASIX MCS7820 Chipset:
Utilizes the ASIX MCS7820 USB-to-serial controller, known for stability, low latency, and support for the iSerial feature when EEPROM is programmed with a unique serial number.

- 512-Byte FIFO per Port:
Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced CPU overhead.

- Auto Data Direction Control (RS485 Mode):
Automatically manages data direction in RS485 half-duplex communication, eliminating the need for manual control signals.

- Ground Isolation:
Port 2 is galvanically isolated from the USB bus and Port 1, preventing ground loops and protecting connected equipment from electrical noise or surges.

- LED Indicators:
Dedicated LEDs for power and data activity on each port:
- PWR: Indicates USB power status
- Serial1: TXD/RXD activity for Port 1
- Serial2: TXD/RXD activity for Port 2

- Compact Metal Enclosure:
Durable metal housing (92 × 118 × 27 mm) provides electromagnetic shielding and mechanical protection.

- Bus-Powered Operation:
Draws power directly from the USB port (5 VDC, 200 mA typical), eliminating the need for an external power supply.

- Flexible Configuration:
DIP switch selectable interface modes for Port 1 (RS232, RS422, or RS485) and Port 2 (RS232).

- Safety and Reliability:
Designed for industrial and “rigid” environments requiring isolation and stable communication.

Country of origin: Taiwan R.O.C.

Customs tariff number: 8473 3020 000

Comprehensive Product Summary – UTS310-I USB to Serial Converter




### 1. Product Overview

Product Name: UTS310-I
Model: UTS310-I
Series: UTS Series – USB to Serial Converter Family
Article Number: UTS310-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
- Web: [www.rayontech.com.tw](http://www.rayontech.com.tw) / [www.rayontech.com](http://www.rayontech.com)

Product Description:
The RAYON UTS310-I is a dual-port USB-to-serial converter designed to provide flexible and safe serial communication interfaces for industrial, commercial, and embedded applications. It integrates one configurable RS232/RS422/RS485 port and one ground-isolated RS232 port within a compact, metal-encased module. The device operates in USB bus-powered mode and is built around the ASIX MCS7820 chipset, offering reliable data transfer with 512-byte FIFO buffers per port. The UTS310-I is engineered for environments requiring both flexibility and electrical isolation, making it ideal for monitoring, control, and backup applications.




### 2. Key Features

- Dual-Port Design:
Provides two independent serial communication ports in one compact enclosure:
- Port 1: Configurable RS232/RS422/RS485 interface
- Port 2: Ground-isolated RS232 interface for safety-critical applications

- USB 2.0 Interface:
Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and plug-and-play compatibility with modern systems.

- ASIX MCS7820 Chipset:
Utilizes the ASIX MCS7820 USB-to-serial controller, known for stability, low latency, and support for the iSerial feature when EEPROM is programmed with a unique serial number.

- 512-Byte FIFO per Port:
Each serial port includes a 512-byte FIFO buffer for efficient data handling and reduced CPU overhead.

- Auto Data Direction Control (RS485 Mode):
Automatically manages data direction in RS485 half-duplex communication, eliminating the need for manual control signals.

- Ground Isolation:
Port 2 is galvanically isolated from the USB bus and Port 1, preventing ground loops and protecting connected equipment from electrical noise or surges.

- LED Indicators:
Dedicated LEDs for power and data activity on each port:
- PWR: Indicates USB power status
- Serial1: TXD/RXD activity for Port 1
- Serial2: TXD/RXD activity for Port 2

- Compact Metal Enclosure:
Durable metal housing (92 × 118 × 27 mm) provides electromagnetic shielding and mechanical protection.

- Bus-Powered Operation:
Draws power directly from the USB port (5 VDC, 200 mA typical), eliminating the need for an external power supply.

- Flexible Configuration:
DIP switch selectable interface modes for Port 1 (RS232, RS422, or RS485) and Port 2 (RS232).

- Safety and Reliability:
Designed for industrial and “rigid” environments requiring isolation and stable communication.




### 3. Technical Specifications

USB Interface:
- Connector Type: USB Type-B female
- Standard: USB 2.0 compliant
- Controller: ASIX MCS7820
- FIFO Buffer: 512 bytes per serial port
- Power Supply: 5 VDC via USB bus
- Current Consumption: 200 mA typical @ 5 VDC

Serial Interfaces:
- Number of Ports: 2
- Port 1: RS232/RS422/RS485 configurable
- Port 2: Ground-isolated RS232
- Connector Type: DB9 male (per port)
- Signal Pins: TX+, TX−, RX+, RX−, GND
- Isolation: Port 2 isolated from USB ground and Port 1
- RS485 Mode: Auto Data Direction Control supported
- Interface Selection: DIP switch configurable

Physical Characteristics:
- Enclosure Material: Metal
- Dimensions: 92 mm (W) × 118 mm (L) × 27 mm (H)
- Weight: Approx. 250 g (typical, including enclosure)
- Color: Metallic gray

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 UTS310-I functions as a USB-to-serial bridge, converting USB data streams into standard serial communication protocols (RS232, RS422, or RS485). It allows a host computer to communicate with legacy serial devices through a modern USB interface.

Use Cases and Applications:
- Industrial automation and control systems
- Data acquisition and instrumentation
- POS (Point-of-Sale) systems
- SCADA and monitoring systems
- Laboratory and test equipment interfacing
- Embedded system debugging and maintenance
- Communication with PLCs, sensors, and modems

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.

Interface Configuration Examples:
- Full-Duplex RS232 + Isolated RS232:
Port 1 set to RS232 (DIP switches 1 & 2 OFF), Port 2 set to RS232 (DIP switches 3 & 4 OFF).
- Full-Duplex RS422 + Isolated RS232:
Port 1 set to RS422 (DIP switches 1 & 2 ON), Port 2 set to RS232 (DIP switches 3 & 4 OFF).
- Half-Duplex RS485 + Isolated RS232:
Port 1 set to RS485 (DIP switch 1 OFF, 2 ON), Port 2 set to RS232 (DIP switches 3 & 4 OFF).

Ground Isolation Function:
The isolated RS232 port (Port 2) provides galvanic separation between the connected device and the host PC, eliminating ground loops and protecting sensitive equipment from voltage differences or electrical noise.




### 5. Components & Accessories

Included Components:
- UTS310-I converter module (metal enclosure)
- USB Type-A to Type-B cable (for host connection)
- User manual and configuration guide

Optional Accessories:
- TB485 Kit: DB9 female to RS485 terminal block adapter for easy wiring in RS485 networks.
- Mounting brackets: For panel or DIN-rail installation (optional, depending on configuration).

Connectors:
- USB Port: Type-B female
- Serial Ports: Two DB9 male connectors
- LED Indicators: Power (PWR), Serial1 (TX/RX), Serial2 (TX/RX)




### 6. Installation & Setup

System Requirements:
- Available USB 2.0 port on host computer
- Supported operating system with USB-to-serial driver (Windows, Linux, macOS)
- No external power supply required (bus-powered)

Installation Steps:
1. Connect the UTS310-I to the host computer using the supplied USB cable.
2. Install the appropriate driver (if required) for the ASIX MCS7820 chipset.
3. Configure Port 1 interface type using the DIP switch:
- RS232: Switches 1 & 2 OFF
- RS422: Switches 1 & 2 ON
- RS485: Switch 1 OFF, Switch 2 ON
4. Connect serial devices to the DB9 connectors.
5. Verify LED indicators for power and data activity.
6. Confirm COM port assignment in the operating system’s device manager.

Mounting Options:
- Desktop placement
- Optional wall or DIN-rail mounting using accessory brackets

Configuration Tools:
- DIP switches for hardware interface selection
- Software configuration via driver utility (for COM port settings, baud rate, parity, etc.)




### 7. Performance & Capabilities

Data Transfer Performance:
- High-speed USB 2.0 interface ensures low-latency communication.
- 512-byte FIFO buffers per port minimize data loss and improve throughput.
- Supports standard baud rates up to 921.6 kbps (depending on host and driver).

Electrical Isolation:
- Port 2 provides galvanic isolation from USB ground, ensuring safe operation in electrically noisy or high-potential environments.

Power Efficiency:
- Operates entirely from USB bus power (5 VDC, 200 mA typical).
- No external power adapter required, reducing installation complexity.

Reliability:
- Metal enclosure provides EMI shielding and mechanical durability.
- LED indicators allow real-time monitoring of communication status.

Limitations:
- Port 1 and Port 2 cannot both be configured as RS422/RS485 simultaneously.
- Isolation is provided only on Port 2 (RS232).
- Requires driver installation for some operating systems.




### 8. Standards & Compliance

Compliance and Certifications:
- USB 2.0 Specification: Fully compliant
- RS232/RS422/RS485 Standards: EIA/TIA compliant
- EMC/EMI: Designed for industrial environments with metal shielding
- RoHS Compliance: Conforms to environmental standards for hazardous substances
- Safety: Ground isolation meets industrial-grade protection requirements

Industry Standards Supported:
- EIA/TIA-232-F (RS232)
- EIA/TIA-422-B (RS422)
- EIA/TIA-485-A (RS485)
- USB 2.0 Full-Speed/High-Speed

iSerial Feature (MCS7820):
When programmed with a unique serial number in EEPROM, the MCS7820 chipset supports the iSerial feature, allowing consistent COM port assignment regardless of which USB port the device is connected to. This ensures stable device identification in multi-port systems and simplifies software configuration.




### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically 1 year, depending on region and distributor).
- Covers defects in materials and workmanship under normal use.

Technical Support:
- Direct support available from RAYON Technology engineers with over 35 years of experience in serial communication systems.
- Contact via email: info@rayontech.com.tw or rayon@ms1.hinet.net

Maintenance:
- No periodic maintenance required.
- Keep connectors clean and free from dust.
- Avoid exposure to excessive humidity or vibration.

Firmware & Driver Updates:
- Updated drivers and documentation available from RAYON’s official website.
- Firmware updates (if applicable) provided for enhanced compatibility and performance.

Related and Compatible Models:
- UTS111: Single RS232/RS422/RS485 port (non-isolated)
- UTS111-I: Single ground-isolated RS232/RS422/RS485 port
- UTS112 / UTS112-I: Dual-port versions (non-isolated / isolated)
- UTS131-I / UTS132-I: Isolated RS422/RS485 models
- UTS400 / UTS040: Four-port RS232 converters (non-isolated / isolated)
- UTS134 / UTS134i: Four-port RS422/RS485 converters (non-isolated / isolated)
- UTS485: Two RS232 + two isolated RS422/RS485 ports
- UTS301-I: One RS232/RS422/RS485 + one isolated RS422/RS485 port

Product Positioning:
The UTS310-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 multi-port converters and high-end isolated models, offering both flexibility (configurable interface) and safety (ground isolation) in a single compact device.




### Summary

The RAYON UTS310-I is a robust, dual-port USB-to-serial converter designed for industrial and professional applications requiring both flexibility and electrical isolation. With one configurable RS232/RS422/RS485 port and one ground-isolated RS232 port, it provides a versatile solution for connecting legacy serial devices to modern USB-equipped systems. The use of the ASIX MCS7820 chipset ensures reliable performance, while the metal enclosure and LED indicators enhance usability and durability. Its bus-powered operation, DIP switch configurability, and compliance with major serial communication standards make it an ideal choice for system integrators, engineers, and OEMs seeking a safe, flexible, and cost-effective serial communication interface.
  • TB485 - DB9 Female to RS485 terminal screw block kit