Comprehensive Product Summary – UTS104P USB 2.0 to 4×RS232 Converter with 5V Supply on DB9 Pin 9

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### 1. Product Overview

Product Name: UTS104P USB to Serial Port Converter
Model Number: UTS104P
Series: UTS Series – USB to Serial Converter Family
Article Number: UTS104P
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
- Websites: [www.rayontech.com](http://www.rayontech.com), [www.computex.com.tw/rayon](http://www.computex.com.tw/rayon)

Product Description:
The Rayon UTS104P is a high-performance USB 2.0 to 4-port RS232 converter housed in a durable metal enclosure. It enables users to expand a computer’s serial communication capability by providing four independent RS232 ports through a single USB interface. Each port includes a 5V power supply on pin 9 of the DB9 connector, allowing direct connection to peripherals such as barcode scanners, POS terminals, and serial-based industrial devices. The converter is powered via USB bus or an optional external 5VDC adapter, offering flexibility for both portable and stationary applications.

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### 2. Key Features

- Four RS232 Ports in One Module: Provides four independent RS232 serial interfaces (Ports A, B, C, D) through a single USB 2.0 connection.
- Integrated 5V Power Supply on DB9 Pin 9: Each RS232 port can supply up to 145 mA at 5VDC, ideal for powering external devices such as barcode readers or scanners.
- USB 2.0 Device Controller: Ensures high-speed data transfer and compatibility with modern USB interfaces.
- MOSCHIP MCS7840 Controller: Utilizes the reliable MCS7840 chipset, supporting advanced serial communication features and iSerial functionality for consistent COM port assignment.
- 512-Byte FIFO Buffer per Port: Enhances data throughput and minimizes latency during high-speed serial communication.
- Dual Power Modes: Supports both USB bus-powered operation and self-powered mode via external 5V adapter (UP110 or UP220).
- LED Indicators per Channel: Individual LEDs for each port display TX/RX activity, plus a power indicator for system status monitoring.
- Compact Metal Enclosure: Provides electromagnetic shielding and mechanical durability for industrial and commercial environments.
- Plug-and-Play USB Interface: Simplifies installation without requiring additional PCI slots or complex configuration.
- Wide Environmental Tolerance: Operates reliably in temperatures from 0°C to 55°C and humidity up to 95% RH.

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### 3. Technical Specifications

Physical Characteristics:
- Dimensions: 150 mm (L) × 90 mm (W) × 27 mm (H)
- Enclosure Material: Metal housing for enhanced durability and EMI protection
- Weight: Not specified (approx. 300–400 g typical for metal-cased converters)
- Color: Metallic finish

USB Interface:
- Connector Type: USB Type-B female
- Standard: USB 2.0 compliant (backward compatible with USB 1.1)
- Controller IC: MOSCHIP MCS7840
- FIFO Buffer: 512 bytes per serial port
- Data Transfer Rate: Up to 12 Mbps (USB 2.0 full-speed)

RS232 Interface:
- Connector Type: DB9 male (x4)
- Number of Ports: 4 (labeled A, B, C, D)
- Signal Lines: Standard RS232 signals (TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, GND)
- Output Power: +5VDC on pin 9, up to 145 mA per port
- Isolation: Non-isolated (standard RS232)
- Baud Rate: Typically supports up to 115.2 kbps or higher depending on host and driver configuration

Power Requirements:
- Operating Voltage: 5VDC
- Current Consumption: 200 mA (typical, USB bus-powered)
- Power Modes:
- Bus-powered: Draws power directly from USB port
- Self-powered: Operates with external 5VDC adapter (UP110 or UP220)
- External Power Adapters:
- UP110 (USA type): 90–240VAC input, 5VDC @ 1.2A output
- UP220 (EU type): 90–240VAC input, 5VDC @ 1.2A output

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

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### 4. Functionality

Operational Overview:
The UTS104P functions as a USB-to-multi-serial converter, translating USB data signals into four independent RS232 serial channels. Each channel operates as a standard COM port within the host operating system, allowing legacy serial devices to interface seamlessly with modern USB-only computers.

Use Cases and Applications:
- Point-of-Sale (POS) Systems: Connect multiple serial-based peripherals such as receipt printers, barcode scanners, and cash drawers.
- Industrial Automation: Interface with PLCs, sensors, and control modules requiring RS232 communication.
- Laboratory and Test Equipment: Provide multiple serial connections for data acquisition instruments.
- Networking and Communication: Manage serial console ports on routers, switches, and embedded systems.
- Embedded Development: Enable debugging and communication with multiple serial devices simultaneously.

Compatibility:
- Operating Systems: Compatible with Windows, Linux, and macOS (driver support dependent on MCS7840 chipset).
- USB Host Systems: Works with any computer or embedded system supporting USB 2.0 or higher.
- Peripheral Devices: Barcode scanners, serial modems, POS terminals, industrial controllers, and other RS232-based equipment.

iSerial Functionality (MCS7840 Feature):
The MCS7840 chipset supports an iSerial feature that allows each converter to retain consistent COM port assignments across different USB ports. When a unique serial number is programmed into the onboard EEPROM, the operating system recognizes the device consistently, preventing reassignment of COM numbers when plugged into different USB ports. This feature is particularly useful in fixed installations or systems requiring stable port mapping.

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### 5. Components & Accessories

Included Items:
- UTS104P Converter Unit (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

Optional Accessories:
- UP110 Power Adapter (USA Type): 90–240VAC input, 5VDC @ 1.2A output
- UP220 Power Adapter (EU Type): 90–240VAC input, 5VDC @ 1.2A output
- UTS400S Self-Power Option: For users requiring dedicated external power operation
- Related Converters:
- TWIN485: Two-port RS232 to RS422/485 converter (ground isolated)
- UTS040: USB to four ground-isolated RS232 ports
- UTS004: USB to four ground-isolated RS422/485 ports
- UTS485: USB to two RS232 and two ground-isolated RS422/485 ports

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### 6. Installation & Setup

System Requirements:
- Available USB 2.0 port on host computer
- Supported operating system with appropriate driver for MCS7840 chipset
- Optional external 5VDC adapter if self-powered mode is desired

Installation Steps:
1. Driver Installation: Install the MCS7840 driver package (available from Rayon or MOSCHIP).
2. Hardware Connection:
- Connect the UTS104P to the host computer using the supplied U101 USB cable.
- If external power is required (for high-current peripherals), connect the UP110 or UP220 adapter to the power input jack.
3. Device Recognition: The host OS will detect four new COM ports (A–D).
4. Peripheral Connection: Attach RS232 devices to the DB9 connectors.
5. Verification: Use LED indicators to confirm power and data activity on each port.

Mounting Options:
- Desktop placement or panel mounting (metal case suitable for industrial environments).
- Compact dimensions allow integration into control cabinets or POS enclosures.

Configuration:
- COM port numbers can be adjusted via the operating system’s device manager.
- iSerial feature ensures consistent port numbering across USB ports when EEPROM is programmed.

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### 7. Performance & Capabilities

Data Throughput:
- Each RS232 port supports full-duplex communication with 512-byte FIFO buffering, ensuring smooth data flow even under heavy load.
- USB 2.0 full-speed interface provides up to 12 Mbps bandwidth shared across all ports.

Power Delivery:
- Each DB9 port can supply up to 145 mA at 5VDC on pin 9, sufficient for powering low-power peripherals such as barcode scanners.
- Total current draw from USB bus is approximately 200 mA; external adapter recommended when multiple powered devices are connected.

Efficiency and Reliability:
- FIFO buffering minimizes data loss and transmission errors.
- LED indicators provide real-time feedback for troubleshooting and monitoring.
- Metal enclosure enhances EMI resistance and thermal stability.

Limitations:
- Non-isolated RS232 ports (for isolation, Rayon offers UTS040 or UTS004 models).
- Power output limited to 145 mA per port; higher loads require external power.
- USB 2.0 full-speed (not high-speed 480 Mbps), adequate for serial communication but not for high-bandwidth data streams.

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### 8. Standards & Compliance

Compliance and Certifications:
- USB 2.0 Specification Compliant
- RS232 Standard (EIA/TIA-232)
- RoHS Compliant (based on typical Rayon product line standards)
- CE/FCC Compliance: Designed to meet electromagnetic compatibility requirements for industrial and commercial use

Industry Standards Supported:
- EIA/TIA-232 for serial communication
- USB Implementers Forum (USB-IF) compliance for USB 2.0 devices

Regulatory Notes:
- Designed for use in controlled environments (0–55°C)
- Meets general safety and EMC requirements for IT and industrial equipment

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### 9. Additional Information

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

Technical Support:
- Support available via email and telephone through Rayon Technology’s technical service department.
- Firmware and driver updates provided through official website.

Maintenance:
- Minimal maintenance required; periodic inspection of connectors and cables recommended.
- Keep device in a dry, dust-free environment to ensure long-term reliability.

Firmware & Driver Updates:
- MCS7840 chipset drivers available for Windows, Linux, and macOS.
- EEPROM programming tools available for enabling iSerial functionality.

Product Family Context:
The UTS104P belongs to Rayon’s extensive UTS series of USB-to-serial converters, which includes models for RS232, RS422, and RS485 communication, as well as isolated and configurable variants. The UTS104P is positioned as a cost-effective, non-isolated RS232 solution with integrated 5V power output, optimized for POS and general-purpose serial expansion.

Related Models Overview:
| Model | RS232 | RS422/485 | Isolated RS232 | Isolated RS422/485 | Total Ports |
|--------|--------|------------|----------------|--------------------|--------------|
| UTS101-I | – | – | 1 | – | 1 |
| UTS102-I | – | – | 2 | – | 2 |
| UTS104P | 4 | – | – | – | 4 |
| UTS040 | – | – | 4 | – | 4 |
| UTS004 | – | – | – | 4 | 4 |
| UTS485 | 2 | – | – | 2 | 4 |
| UTS134 | – | 4 | – | – | 4 |
| UTS134i | – | – | – | 4 | 4 |
| UTS114 | 4 | 4 | – | – | 4 |

This table illustrates the UTS104P’s position as a standard, non-isolated RS232 converter with integrated power output, ideal for cost-sensitive applications requiring multiple serial ports.

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### Summary

The Rayon UTS104P USB 2.0 to 4×RS232 Converter is a robust, feature-rich solution for expanding serial connectivity in modern computing environments. It combines four independent RS232 ports, integrated 5V power output, and reliable MOSCHIP MCS7840 control in a compact metal enclosure. Designed for POS, industrial, and instrumentation applications, it offers flexible power options, strong performance, and straightforward installation. With its 512-byte FIFO buffers, LED indicators, and iSerial capability, the UTS104P ensures stable, efficient, and consistent serial communication across diverse operating conditions.

Manufacturer: Rayon Technology Co., Ltd.
Model: UTS104P
Type: USB 2.0 to 4-Port RS232 Converter with 5V Power Output
Key Advantages: Multi-port expansion, integrated power delivery, durable construction, and reliable MOSCHIP-based performance.