Comprehensive Product Summary – UTS102-I USB 2.0 to Isolated Dual RS232 Converter (Bus Power Mode)

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### 1. Product Overview

Product Name: UTS102-I
Model Number: UTS102-I
Series: UTS Series – Ground Isolated USB to Serial Converter Family
Article Number: UTS102-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 UTS102-I is a USB 2.0 to dual isolated RS232 converter designed for industrial, laboratory, and commercial applications requiring reliable serial communication with electrical isolation. It integrates two independent, ground-isolated RS232 ports within a compact metal enclosure, providing enhanced safety, noise immunity, and protection against ground loops. The device operates in USB bus-powered mode, eliminating the need for an external power supply.

Intended Use:
The UTS102-I is ideal for connecting legacy RS232 devices—such as PLCs, sensors, barcode readers, and instrumentation—to modern USB-equipped computers or embedded systems. It is particularly suited for environments where electrical isolation is critical for system stability and operator safety.

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### 2. Key Features

- Dual Isolated RS232 Ports: Two independent RS232 serial channels, each galvanically isolated from the USB interface and from each other, ensuring safe and interference-free communication.
- 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 Controller: Utilizes the ASIX MCS7820 USB-to-dual-UART bridge chip, providing stable performance, low latency, and reliable data throughput.
- 512-Byte FIFO Buffer per Port: Each serial channel includes a 512-byte FIFO buffer for efficient data handling and reduced CPU overhead.
- Bus-Powered Operation: Draws power directly from the USB port (5VDC, 300–400mA typical), eliminating the need for an external power adapter.
- LED Indicators: Dedicated LEDs for power and per-port TX/RX activity monitoring, simplifying diagnostics and status verification.
- Metal Enclosure: Durable, shielded metal housing for improved EMI protection and mechanical robustness.
- Compact Design: Space-efficient form factor (92 × 118 × 27 mm) suitable for desktop, rack, or embedded installations.
- Ground Isolation: Electrical isolation between USB and RS232 interfaces, and between the two RS232 ports, preventing ground potential differences and protecting connected equipment.
- Plug-and-Play Installation: Supports automatic detection and configuration under major operating systems with minimal driver setup.
- Safety and Reliability: Designed for industrial-grade operation with wide environmental tolerance and robust electrical design.

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### 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 (no external supply required)
- Current Consumption: 300 mA typical @ 5VDC (maximum 400 mA)

RS232 Interface:
- Number of Ports: 2 independent channels (Port 1 and Port 2)
- Connector Type: DB9 male connectors (standard pinout)
- Isolation:
- Between USB and RS232: Ground isolated
- Between Port 1 and Port 2: Ground isolated
- Signal Lines: TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, GND (standard RS232 signals)
- Baud Rate: Up to 921.6 kbps (dependent on host and driver support)
- Data Bits: 5, 6, 7, or 8 bits
- Stop Bits: 1 or 2
- Parity: None, Even, Odd, Mark, Space
- Flow Control: Hardware (RTS/CTS), Software (XON/XOFF)

LED Indicators:
- PWR: Indicates USB power status (ON when powered)
- Serial1: TXD/RXD activity indicator for Port 1
- Serial2: TXD/RXD activity indicator for Port 2

Power Requirements:
- Input Voltage: 5VDC (from USB bus)
- Current Draw: 300 mA typical, 400 mA maximum

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)

Physical Characteristics:
- Dimensions: 92 mm (W) × 118 mm (L) × 27 mm (H)
- Enclosure Material: Metal (EMI-shielded)
- Weight: Approx. 250–300 g (typical, including enclosure and connectors)
- Color: Metallic silver or anodized aluminum finish

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### 4. Functionality

Operating Principle:
The UTS102-I functions as a USB-to-serial bridge, converting USB data packets into RS232 signals and vice versa. The ASIX MCS7820 controller manages USB communication and UART operations, while the onboard isolation circuitry ensures that electrical noise or surges on the RS232 side do not propagate to the host computer.

Use Cases and Applications:
- Industrial Automation: Connecting PLCs, motor controllers, and sensors to supervisory control systems.
- Laboratory Equipment: Interfacing with oscilloscopes, analyzers, and test instruments requiring RS232 communication.
- Point-of-Sale (POS) Systems: Integrating barcode scanners, receipt printers, and cash drawers.
- Networking and Communication: Linking modems, routers, and serial consoles for configuration and monitoring.
- Embedded Systems: Providing serial connectivity for development boards or embedded controllers.
- Data Acquisition: Collecting data from serial-based sensors or instruments in research and production environments.

Compatibility:
- Operating Systems: Compatible with Windows, Linux, and macOS (driver support dependent on OS version).
- Hardware: Works with any USB 2.0 or higher host port.
- Software Interface: Appears as standard COM ports in the operating system, allowing use with any serial communication software.

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### 5. Components & Accessories

Included Items:
- UTS102-I converter unit (metal enclosure)
- USB Type-A to Type-B cable (typically 1.5 m)
- Quick installation guide or user manual
- Driver CD or downloadable driver package (depending on distribution)

Optional Accessories:
- DIN-rail mounting kit (for industrial installations)
- DB9-to-terminal block adapters
- Extended USB cables (up to 5 m per USB 2.0 specification)
- External surge protectors (for harsh environments)

Connectors:
- USB Side: 1 × USB Type-B female
- RS232 Side: 2 × DB9 male connectors

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### 6. Installation & Setup

System Requirements:
- Available USB 2.0 or higher port
- Supported operating system with USB serial driver support
- Administrative privileges for driver installation (Windows)

Installation Steps:
1. Connect the UTS102-I to the host computer using the supplied USB cable.
2. The operating system detects the new hardware and prompts for driver installation.
3. Install the appropriate driver (ASIX MCS7820-based) from the included CD or manufacturer’s website.
4. Once installed, two virtual COM ports appear in the system’s device manager.
5. Connect RS232 devices to the DB9 ports as required.
6. Verify communication using terminal software or application-specific tools.

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

Configuration:
- COM port numbers can be reassigned via the operating system’s device manager.
- Baud rate, parity, and flow control settings are configurable through software.
- Supports iSerial feature (when EEPROM programmed) for consistent COM port assignment across USB ports.

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### 7. Performance & Capabilities

Data Throughput:
- Supports high-speed serial communication up to 921.6 kbps per port.
- 512-byte FIFO buffers minimize data loss and improve throughput under heavy load.

Latency and Response:
- Low-latency USB-to-UART conversion suitable for real-time control and monitoring applications.

Isolation Performance:
- Electrical isolation between USB and RS232 interfaces prevents ground loops and protects against transient voltages.
- Each RS232 port is isolated from the other, ensuring independent operation and safety.

Power Efficiency:
- Operates entirely from USB bus power, consuming less than 400 mA at 5VDC.
- No external power adapter required, simplifying deployment.

Limitations:
- Limited to RS232 signaling; does not support RS422/RS485 (see UTS132-I or UTS112-I for those interfaces).
- Maximum cable length per RS232 port is subject to standard RS232 limitations (typically up to 15 m).

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### 8. Standards & Compliance

Electrical and Communication Standards:
- USB 2.0 (Full-Speed) compliant
- RS232 (EIA/TIA-232) compliant
- Ground isolation per industrial safety standards

Regulatory Compliance:
- CE and FCC Class B (EMI/EMC compliance, depending on region)
- RoHS compliant (lead-free construction)
- ISO 9001 manufacturing process compliance (RAYON Technology)

Industry Standards Supported:
- Compatible with standard serial communication protocols
- Supports Windows COM port driver model and Linux ttyUSB interface

Safety and Reliability:
- Designed for industrial-grade operation with robust isolation and surge protection
- Metal enclosure provides EMI shielding and mechanical durability

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### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically 1 year, region-dependent) covering defects in materials and workmanship.

Technical Support:
- Email and phone support available through RAYON Technology.
- Driver updates and documentation downloadable from the official website.

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

Firmware and Driver Updates:
- Updated drivers available for Windows, Linux, and macOS platforms.
- Firmware updates (if applicable) can be applied via USB interface.

Related and Upgrade Models:
- UTS101-I: Single isolated RS232 port
- UTS132-I: Dual isolated RS422/RS485 ports
- UTS112-I: Dual isolated RS232/RS422/RS485 ports
- UTS040: Quad isolated RS232 ports
- UTS134i: Quad isolated RS422/RS485 ports (self-powered)
- UTS485: Two RS232 + two isolated RS422/RS485 ports

Model Comparison Summary:
| Model | RS232 | RS422/485 | Isolated RS232 | Isolated RS422/485 | Total Ports |
|--------|--------|------------|----------------|--------------------|--------------|
| UTS101-I | – | – | 1 | – | 1 |
| UTS102-I | – | – | 2 | – | 2 |
| UTS132-I | – | – | – | 2 | 2 |
| UTS112-I | – | – | 2 | 2 | 2 |
| UTS040 | – | – | 4 | – | 4 |
| UTS134i | – | – | – | 4 | 4 |

iSerial Feature (MCS7820):
The ASIX MCS7820 controller supports the iSerial feature when a unique serial number is programmed into its EEPROM. This ensures that the same COM port numbers are retained regardless of which USB port the device is connected to on the host system. This feature simplifies multi-port system management and avoids reconfiguration when devices are reconnected to different USB ports.

Example:
- Without iSerial: COM port numbers change when plugged into different USB ports.
- With iSerial: COM port numbers remain consistent across all USB ports on the same host.

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### Summary

The RAYON UTS102-I is a robust, industrial-grade USB 2.0 to dual isolated RS232 converter designed for environments where electrical isolation, reliability, and compactness are essential. Featuring the ASIX MCS7820 chipset, 512-byte FIFO buffers, and dual ground-isolated RS232 ports, it ensures stable and interference-free communication between USB hosts and serial devices. Its bus-powered operation, metal enclosure, and LED indicators make it a practical and safe solution for industrial automation, laboratory instrumentation, and POS systems.

With compliance to USB 2.0 and RS232 standards, and support for the iSerial feature for consistent COM port assignment, the UTS102-I offers a dependable, plug-and-play interface bridging modern computing platforms with legacy serial equipment.

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Manufacturer:
RAYON TECHNOLOGY CO., LTD.
2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Website: [www.rayontech.com.tw](http://www.rayontech.com.tw)
Email: info@rayontech.com.tw