Comprehensive Product Summary – UTS310 USB 2.0 to 3×RS232 and Isolated 1×RS232 Converter

---

### 1. Product Overview

Product Name: UTS310
Model: UTS310
Series: UTS400 Series – USB to Serial Port Converter
Article Number: UTS310
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
- Web: [www.rayontech.com](http://www.rayontech.com)

Product Description:
The UTS310 is a high-performance USB 2.0 to multi-port serial converter designed to provide three standard RS232 ports and one isolated RS232 port in a single, compact, and rugged metal enclosure. It is part of Rayon’s UTS400 series of USB-to-serial interface modules, engineered for industrial, laboratory, and commercial applications requiring reliable serial communication over USB. The device integrates the MOSCHIP MCS7840 controller, offering four independent serial channels with 512-byte FIFO buffers per port, LED indicators for each channel, and full USB bus-powered operation.

---

### 2. Key Features

- Multi-Port Serial Expansion: Provides four independent serial communication ports—three standard RS232 and one isolated RS232—through a single USB 2.0 interface.
- USB 2.0 Compliance: Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and backward compatibility with USB 1.1 hosts.
- MOSCHIP MCS7840 Controller: Utilizes the MCS7840 USB-to-quad-serial controller chip, offering stable performance, low latency, and hardware FIFO buffering.
- 512-Byte FIFO per Port: Each serial channel includes a 512-byte transmit and receive FIFO buffer, minimizing data loss and improving throughput.
- LED Indicators: Dedicated LED indicators for each port (A, B, C, D) display TX/RX activity, along with a power indicator for system status monitoring.
- Bus-Powered Operation: Draws power directly from the USB bus (5VDC, 400mA), eliminating the need for an external power supply.
- Isolated Serial Channel: One RS232 port is galvanically isolated, providing electrical protection and noise immunity for sensitive equipment.
- Compact Metal Enclosure: Durable 90 × 150 × 27 mm metal housing ensures electromagnetic shielding and mechanical protection.
- Plug-and-Play Installation: Supports hot-plugging and automatic COM port assignment under Windows and other operating systems.
- iSerial Feature Support: When programmed with a unique EEPROM serial number, the MCS7840 controller retains consistent COM port numbering across USB ports.
- Flexible Configuration: Compatible with other UTS400 variants supporting RS422/485 interfaces, allowing system integrators to select models for specific communication standards.

---

### 3. Technical Specifications

Physical Characteristics:
- Dimensions: 90 mm (W) × 150 mm (L) × 27 mm (H)
- Enclosure Material: Metal (EMI-shielded)
- Weight: Approx. 300–400 g (typical, depending on configuration)
- Color/Finish: Industrial metallic finish

Electrical Characteristics:
- Power Input: 5 VDC (USB bus-powered)
- Current Consumption: 400 mA typical
- Optional Power Mode: Self-powered version (UTS400S) available for external 5 VDC adapter operation

USB Interface:
- Connector Type: USB Type-B female
- USB Specification: USB 2.0 full-speed device controller
- Data Buffer: 512-byte FIFO per serial port
- Chipset: MOSCHIP MCS7840

Serial Port Interface:
- Connector Type: DB9 male connectors (x4)
- Interface Type: RS232 (3 ports) + Isolated RS232 (1 port)
- Signal Pins: TXD, RXD, DTR, DSR, RTS, CTS, DCD, RI, GND
- Isolation: One port galvanically isolated for ground loop protection
- Number of Ports: 4 total (A, B, C, D)
- LED Indicators:
- PWR: Power ON indicator
- ATRD: Port A TXD/RXD activity
- BTRD: Port B TXD/RXD activity
- CTRD: Port C TXD/RXD activity
- DTRD: Port D TXD/RXD activity

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

---

### 4. Functionality

Operational Overview:
The UTS310 functions as a USB-to-multi-serial converter, enabling a host computer to communicate with up to four serial devices simultaneously. Upon connection to a USB port, the MCS7840 controller enumerates as four virtual COM ports, each corresponding to one of the DB9 connectors. The device supports standard RS232 signaling levels and protocols, with one port electrically isolated to prevent ground loops and protect connected equipment.

Use Cases and Applications:
- Industrial Automation: Connecting PLCs, sensors, and controllers to modern PCs without native serial ports.
- POS Systems: Integrating barcode scanners, receipt printers, and card readers.
- Laboratory Equipment: Interfacing with instruments requiring RS232 communication.
- Networking and Communication: Managing modems, routers, and serial consoles.
- Embedded Systems Development: Debugging and monitoring serial data streams.
- Data Acquisition Systems: Collecting data from multiple serial sensors or devices.

Compatibility:
- Operating Systems: Compatible with Windows, Linux, and macOS (driver support dependent on OS version).
- USB Host Compatibility: Works with any USB 2.0 or higher host port.
- Hot-Plug Support: Fully supports USB plug-and-play and hot-swapping.

---

### 5. Components & Accessories

Included Items:
- UTS310 Converter Module (metal enclosure with four DB9 male connectors and one USB Type-B port)
- U101 USB Cable: 6-foot USB Type-A to Type-B cable for host connection
- User Documentation: Quick installation guide and driver information

Optional Accessories:
- External Power Adapter (for self-powered models) – 5 VDC regulated supply
- DIN Rail Mounting Kit (optional, for industrial installations)
- USB Extension Cable (for extended reach in control cabinets)

Connectors:
- USB Port: Type-B female
- Serial Ports: Four DB9 male connectors (RS232 standard pinout)

---

### 6. Installation & Setup

System Requirements:
- Available USB 2.0 or higher port
- Supported operating system with appropriate driver (Windows/Linux/macOS)
- No external power supply required for standard UTS310 (bus-powered)

Installation Steps:
1. Connect the UTS310 to the host computer using the supplied USB cable.
2. The operating system detects the device and installs the appropriate driver (manual driver installation may be required for some OS versions).
3. Once installed, four virtual COM ports appear in the system’s device manager.
4. Connect RS232 devices to the DB9 connectors labeled A, B, C, and D.
5. Verify communication using terminal software or application-specific tools.

Configuration:
- The isolated RS232 port is pre-configured and requires no user adjustment.
- DIP switch configuration is not required for the UTS310 model (RS232-only).
- For other UTS400 variants supporting RS422/485, DIP switches allow interface selection.

Mounting Options:
- Desktop placement
- Wall or panel mounting (via optional brackets)
- DIN rail mounting (optional accessory)

---

### 7. Performance & Capabilities

Data Transfer Performance:
- Baud Rate: Supports standard RS232 baud rates up to 921.6 kbps (chipset dependent)
- FIFO Buffer: 512 bytes per port for both transmit and receive
- Latency: Low-latency USB-to-serial conversion suitable for real-time applications

Capacity:
- Four independent serial channels operating concurrently
- Each port can handle full-duplex communication

Efficiency:
- Bus-powered design minimizes external power requirements
- LED indicators provide real-time status feedback for efficient troubleshooting

Limitations:
- RS232-only interface (no RS422/485 support in this model)
- Total current draw limited by USB port capacity (400 mA typical)
- Isolation provided on one port only

Reliability:
- Industrial-grade metal housing ensures durability and EMI protection
- MOSCHIP MCS7840 chipset provides stable, long-term operation

---

### 8. Standards & Compliance

Electrical and Communication Standards:
- USB Specification: Compliant with USB 2.0 (Full-Speed, 12 Mbps)
- Serial Communication: Complies with EIA/TIA RS232 standard
- Isolation: Meets industrial isolation requirements for one port

Regulatory Compliance:
- CE Marking: Conforms to European EMC and safety directives (typical for Rayon products)
- RoHS Compliance: Manufactured with lead-free, environmentally safe materials
- FCC Compliance: Meets Class B digital device requirements (for electromagnetic emissions)

Industry Standards:
- Compatible with standard serial communication protocols used in industrial automation, POS, and instrumentation sectors.

---

### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically 1 year, subject to regional policy) covering defects in materials and workmanship.

Technical Support:
- Provided by Rayon Technology Co., Ltd. via email and telephone.
- Driver downloads and documentation available on the official website.

Maintenance:
- No regular maintenance required beyond standard cable and connector inspection.
- Keep device in a clean, dry environment within specified temperature and humidity ranges.

Firmware & Driver Updates:
- Updated drivers and firmware (if applicable) can be obtained from Rayon’s support portal.
- MCS7840 chipset drivers are maintained by MOSCHIP and compatible with major operating systems.

Product Family Context:
The UTS310 belongs to the UTS400 series, which includes multiple configurations for different serial interface combinations:
- UTS400: 4×RS232
- UTS040: 4×Isolated RS232
- UTS004: 4×Isolated RS422/485
- UTS301: 3×RS232 + 1×Isolated RS422/485
- UTS310: 3×RS232 + 1×Isolated RS232 (this model)
- UTS202, UTS211, UTS220: Mixed RS232/RS422/RS485 configurations

This modular approach allows system designers to select the optimal model for their communication requirements, balancing cost, isolation, and interface flexibility.

iSerial Feature (MCS7840):
When equipped with EEPROM containing a unique serial number, the MCS7840 controller supports the iSerial feature. This ensures that each UTS310 retains consistent COM port numbering regardless of which USB port it is connected to on the host system. This feature simplifies system integration and prevents reconfiguration when devices are reconnected to different USB ports.

Revision Information:
- Document Revision: Rev 1.1 (Preliminary)
- Date: August 7, 2006

---

### Summary

The RAYON UTS310 USB 2.0 to 3×RS232 and Isolated 1×RS232 Converter is a robust, industrial-grade communication interface designed for users who require multiple serial connections through a single USB port. Combining the reliability of the MOSCHIP MCS7840 controller with a rugged metal enclosure, the UTS310 delivers stable, high-speed serial communication for a wide range of applications—from industrial automation to laboratory instrumentation. Its isolated RS232 port provides additional protection for sensitive equipment, while its plug-and-play USB interface ensures easy integration into modern computing environments. With comprehensive LED indicators, bus-powered operation, and support for the iSerial feature, the UTS310 stands out as a flexible and dependable solution for expanding serial connectivity in both industrial and commercial systems.