Comprehensive Product Summary – UTS013 USB 2.0 to Isolated 1×RS232 + 3×RS485/422 Converter

---

### 1. Product Overview

Product Name: USB 2.0 to Isolated 1×RS232 + 3×RS485/422 Converter
Model: UTS013
Series: UTS400 Series – USB to Serial Port Converter
Article Number: UTS013
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) / [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)

Product Description:
The Rayon UTS013 is a high-performance USB 2.0 to serial communication converter designed to provide one isolated RS232 port and three isolated RS422/RS485 ports within a single, compact, metal-encased module. It is part of the UTS400 series, which offers flexible, isolated, and multi-port serial communication solutions for industrial, automation, and data acquisition applications. The UTS013 integrates the MOSCHIP MCS7840 USB-to-serial controller, providing reliable data transfer with 512-byte FIFO buffers per port and full USB 2.0 compliance.

---

### 2. Key Features

- Multi-Port Serial Conversion: Supports four independent serial ports in one enclosure — one isolated RS232 and three isolated RS422/RS485 ports.
- USB 2.0 Interface: Fully compliant with USB 2.0 specifications, ensuring high-speed data transfer and backward compatibility with USB 1.1.
- Isolation Protection: Each serial port is galvanically isolated to prevent ground loops and protect connected equipment from electrical surges.
- MOSCHIP MCS7840 Controller: Utilizes a robust USB-to-serial bridge chip with integrated 512-byte FIFO per port for efficient data buffering and reduced latency.
- Auto Data Direction Control: RS485 ports support automatic data direction control, simplifying half-duplex communication without additional software or hardware control.
- LED Indicators: Individual LED indicators for each port (TX/RX activity) and power status provide real-time operational feedback.
- Bus-Powered Operation: Operates directly from the USB bus (5VDC, 400mA), eliminating the need for an external power supply.
- Compact Metal Enclosure: Durable metal housing (90 × 150 × 27 mm) provides EMI shielding and mechanical protection.
- Flexible Configuration: RS422 or RS485 mode selectable via DIP switch for each port.
- 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 retains consistent COM port numbers across different USB ports.
- Wide Environmental Tolerance: Designed for industrial environments with operating temperatures from 0°C to 55°C and humidity up to 95% RH.

---

### 3. Technical Specifications

Physical Characteristics:
- Dimensions: 90 mm (W) × 150 mm (L) × 27 mm (H)
- Enclosure Material: Metal (provides shielding and durability)
- Weight: Not specified (approx. < 500 g typical for metal-cased converters)

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

USB Interface:
- Connector Type: USB Type-B female
- Standard Compliance: USB 2.0 (Full-Speed, 12 Mbps)
- Controller IC: MOSCHIP MCS7840
- FIFO Buffer: 512 bytes per serial port
- Hot-Plug Support: Yes
- iSerial Support: Yes (requires EEPROM with unique serial number)

Serial Interface:
- Connector Type: DB9 male connectors (one per port)
- Number of Ports: 4 total (1× isolated RS232, 3× isolated RS422/RS485)
- Isolation: Galvanic isolation between ports and USB interface
- Signal Pins (RS422/485): TX+, TX−, RX+, RX−, isolated GND
- RS485 Mode: Auto Data Direction Control supported
- RS422/RS485 Selection: Configurable via DIP switch
- RS485 Wiring:
- TX+ and RX+ shorted as DATA+
- TX− and RX− shorted as DATA−

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

Operational Overview:
The UTS013 functions as a USB-to-multi-serial converter, enabling a computer or embedded system to communicate with multiple serial devices through a single USB connection. The internal MCS7840 controller translates USB data packets into standard serial communication signals (RS232, RS422, or RS485) and vice versa.

Use Cases and Applications:
- Industrial automation and control systems
- Data acquisition and monitoring equipment
- Building management systems (BMS)
- SCADA and PLC communication
- POS (Point-of-Sale) terminals
- Barcode scanners, sensors, and instrumentation interfaces
- Serial device networking and legacy equipment integration

Compatibility:
- Compatible with Windows, Linux, and other operating systems supporting USB CDC or vendor-specific drivers.
- Works with standard serial communication software and terminal emulators.
- Supports hot-plugging and automatic COM port assignment.

Communication Modes:
- RS232: Standard asynchronous serial communication for point-to-point connections.
- RS422: Differential signaling for long-distance, high-speed communication.
- RS485: Multi-drop communication supporting up to 32 devices on a single bus, with automatic direction control for half-duplex operation.

---

### 5. Components & Accessories

Included Items:
- UTS013 converter unit (metal enclosure)
- USB cable (Model U101): 6-foot USB Type-A to Type-B cable
- User documentation (may vary by shipment)

Optional Accessories:
- External 5VDC power adapter (for self-powered variant UTS400S)
- Mounting brackets or DIN-rail adapters (optional, depending on installation environment)

Connectors:
- USB Port: Type-B female (host connection)
- Serial Ports: Four DB9 male connectors (one RS232, three RS422/485)
- LED Indicators:
- PWR: Power ON indicator
- ATRD: RS232 port TX/RX activity
- BTRD, CTRD, DTRD: RS422/485 port TX/RX activity indicators

---

### 6. Installation & Setup

System Requirements:
- Available USB 2.0 or 1.1 port
- Supported operating system with USB-to-serial driver support (Windows, Linux, macOS)
- No external power supply required for bus-powered operation

Installation Steps:
1. Connect the UTS013 to the host computer using the supplied USB cable.
2. Allow the operating system to detect the device and install the appropriate driver (MCS7840 driver).
3. Verify COM port assignments in the device manager or system settings.
4. Connect serial devices to the DB9 ports as required.
5. Configure RS422/RS485 mode via DIP switch if necessary.
6. Observe LED indicators to confirm power and communication activity.

Mounting Options:
- Desktop or panel mounting
- Optional DIN-rail mounting (if accessory available)

Configuration:
- DIP switches inside the enclosure allow selection between RS422 and RS485 modes for each port.
- RS485 mode automatically manages data direction, eliminating the need for manual RTS control.

---

### 7. Performance & Capabilities

Data Throughput:
- USB 2.0 Full-Speed (12 Mbps) interface ensures sufficient bandwidth for four simultaneous serial channels.
- Each serial port supports standard baud rates up to 921.6 kbps (typical for MCS7840-based devices).

Buffering:
- 512-byte FIFO per port minimizes data loss and ensures smooth communication under high-load conditions.

Isolation Performance:
- Electrical isolation between USB and serial ports protects against ground potential differences and transient voltages.

Efficiency:
- Bus-powered design reduces cabling complexity and power supply requirements.
- Auto Data Direction Control enhances RS485 communication efficiency.

Limitations:
- Total current draw limited to 400 mA from USB bus; may require self-powered version for high-load applications.
- RS485/422 configuration requires DIP switch access inside the enclosure.

---

### 8. Standards & Compliance

Compliance and Certifications:
- USB Specification: Compliant with USB 2.0 standard
- Serial Standards: RS232 (EIA/TIA-232), RS422 (EIA/TIA-422), RS485 (EIA/TIA-485)
- Isolation: Meets industrial-grade isolation requirements for signal integrity and safety
- Environmental: Designed for industrial temperature and humidity ranges
- RoHS Compliance: Expected (typical for Rayon products; verify per batch)
- EMI/EMC: Metal enclosure provides shielding against electromagnetic interference

Industry Standards Supported:
- Asynchronous serial communication protocols
- Auto Data Direction Control for RS485
- Plug-and-play USB device enumeration

---

### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically 1 year; confirm with Rayon Technology)

Technical Support:
- Provided by Rayon Technology via email and phone
- Driver downloads and documentation available on the manufacturer’s website

Maintenance:
- No regular maintenance required beyond ensuring clean connectors and stable USB connections
- Periodic firmware or driver updates may be available for improved performance

Firmware & Driver Updates:
- MCS7840 driver updates available from MOSCHIP or Rayon Technology
- EEPROM programming for iSerial feature can be performed by the manufacturer or qualified technicians

Product Family Context:
The UTS013 belongs to the UTS400 series, which includes multiple models with varying combinations of RS232 and RS422/485 ports. The UTS013 specifically provides a balanced configuration for mixed communication environments requiring both isolated RS232 and RS485/422 interfaces.

Model Comparison (Excerpt):
| Model | RS232 | Isolated RS232 | RS422/485 | Isolated RS422/485 | Total Ports |
|--------|--------|----------------|------------|--------------------|--------------|
| UTS400 | 4 | 0 | 0 | 0 | 4 |
| UTS040 | 0 | 4 | 0 | 0 | 4 |
| UTS004 | 0 | 0 | 0 | 4 | 4 |
| UTS013 | 0 | 1 | 0 | 3 | 4 |
| UTS022 | 0 | 2 | 0 | 2 | 4 |
| UTS031 | 0 | 3 | 0 | 1 | 4 |

Unique Advantages of UTS013:
- Combines isolated RS232 and RS485/422 interfaces in one compact unit.
- Ideal for mixed-protocol industrial systems requiring both point-to-point and multi-drop communication.
- Provides robust isolation and reliable data integrity in electrically noisy environments.

---

### Summary

The Rayon UTS013 USB 2.0 to Isolated 1×RS232 + 3×RS485/422 Converter is a versatile, industrial-grade communication interface designed for users who require multiple isolated serial connections through a single USB port. Featuring the MOSCHIP MCS7840 controller, 512-byte FIFO buffers, and galvanic isolation, it ensures stable, high-speed, and interference-free data transmission. Its compact metal enclosure, LED indicators, and flexible configuration options make it suitable for a wide range of industrial, automation, and data communication applications.

With its combination of isolation, flexibility, and plug-and-play convenience, the UTS013 stands out as a reliable solution for integrating legacy serial devices into modern USB-based systems while maintaining electrical safety and communication integrity.