Comprehensive Product Summary – TRP-C08H USB to 2×RS232 and 2×RS422/485 Isolated Converter

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### 1. Product Overview

Product Name: USB to 2×RS232 and 2×RS422/485 Isolated Converter
Model: TRP-C08H
Series: TRP-C Industrial Communication Converter Series
Article Number: TRP-C08H
Manufacturer: Trycom Technology Co., Ltd.
Manufacturer Address: No. 35, Zhongxing Rd., Guishan Township, Taoyuan County 333, Taiwan
Contact: Tel: +886-3-350-3351 | Fax: +886-3-350-3352
Website: [www.trycom.com.tw](http://www.trycom.com.tw)
Revision: User Manual Rev. 1.7 (Printed February 2014)

The Trycom TRP-C08H is a high-performance industrial-grade USB-to-multi-serial converter designed to connect up to four serial devices simultaneously—two RS-232 and two RS-422/485 ports—through a single USB 2.0 interface. It provides robust 3000 VDC optical isolation and surge protection, ensuring reliable communication in electrically noisy industrial environments. The converter is engineered for automation, instrumentation, and data acquisition systems requiring stable, isolated serial communication over extended distances.

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### 2. Key Features

- Multi-Port Serial Expansion: Provides four independent serial ports (2×RS-232 and 2×RS-422/485) via one USB 2.0 connection.
- Automatic Configuration: Auto-detects RS-422/485 mode, baud rate, and data direction flow control without manual switch settings.
- High Isolation Protection: 3000 VDC optical isolation between USB and RS-422/485 interfaces to prevent ground loops and voltage surges.
- Surge and ESD Protection: ±15 kV ESD protection on all serial lines; surge and short-circuit protection on RS-422/485 data lines.
- Flexible Mounting: Supports both DIN-rail and panel mounting for industrial installation flexibility.
- USB Powered Operation: Draws power directly from the USB port (260 mA typical), eliminating the need for an external power supply.
- Independent Port Configuration: Each serial port can be configured independently for baud rate, data bits, parity, and stop bits.
- High-Speed Data Transfer: Supports communication speeds from 300 bps up to 256 Kbps.
- FIFO Buffering: On-chip 512-byte FIFO for upstream and downstream data buffering, ensuring smooth data flow.
- LED Indicators: Power and communication LEDs (TXA/RXA/TXB/RXB) provide real-time status monitoring.
- Wide OS Compatibility: Supports Windows (98/ME/2000/XP/Vista/7/8.1/CE5.0–7.0), Linux, Mac OS, and Android.
- Extended Communication Distance: RS-422/485 communication up to 4000 ft (1250 m).
- Industrial-Grade Design: Rugged aluminum enclosure with compact dimensions and wide operating temperature range (0–65°C).

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Input Interface | USB 2.0 (Type B connector) |
| Output Interfaces | 2×RS-232 (DB-9 male, DTE), 2×RS-422/485 (4-pin terminal block) |
| RS-232 Mode | Full-duplex, standard 9-pin DTE configuration |
| RS-422 Mode | Differential 4-wire full-duplex (TX+, TX−, RX+, RX−) |
| RS-485 Mode | Differential 2-wire half-duplex (D+, D−) |
| Data Format | Asynchronous data with configurable bits, parity, and stop bits |
| Parity Options | None, Odd, Even, Mark, Space |
| Data Bits | 5, 6, 7, or 8 bits |
| Stop Bits | 1, 1.5, or 2 |
| Baud Rate Range | 300 bps to 256 Kbps (auto-switching) |
| Isolation Voltage | 3000 VDC optical isolation (RS-422/485) |
| Protection | ±15 kV ESD on all serial lines; surge and short-circuit protection on RS-422/485 |
| Communication Distance | Up to 4000 ft (1250 m) for RS-422/485 |
| Power Supply | USB bus-powered (260 mA typical) or optional external DC input |
| Connection Type | Screw terminal block (AWG #12–30) |
| Indicators | Power (PWR), TXA/RXA (RS-422/485), TXB/RXB (RS-232) |
| Operating Temperature | 0°C to 65°C |
| Storage Temperature | −20°C to 65°C |
| Humidity | 10–90% RH, non-condensing |
| Dimensions | 151 mm (L) × 75 mm (W) × 26 mm (H) |
| Weight | 395 g |
| Enclosure Material | Industrial-grade aluminum |
| Mounting Options | DIN-rail or panel mount |
| Cable Type | USB 2.0 Type A to Type B cable |
| Compliance | USB 2.0, backward compatible with USB 1.1/1.0 |

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### 4. Functionality

The TRP-C08H functions as a USB-to-serial communication bridge, enabling a host computer to interface with multiple serial devices simultaneously. Upon connection, the converter enumerates as four independent COM ports—two for RS-232 and two for RS-422/485—allowing concurrent communication with different serial protocols.

Operation Overview:
- The USB 2.0 interface provides both data and power to the converter.
- Each serial port operates independently, supporting unique baud rates and data formats.
- The RS-422/485 ports feature automatic mode detection and direction control, eliminating manual configuration.
- The converter’s internal 512-byte FIFO buffers manage data flow efficiently, minimizing latency and preventing data loss.
- LED indicators provide visual feedback for power and data transmission/reception activity.

Typical Applications:
- Industrial automation and process control systems
- SCADA and PLC communication
- Data acquisition and monitoring systems
- Laboratory instrumentation and test equipment
- POS systems and barcode scanners
- Serial device networking and remote monitoring

Compatibility:
- Fully compatible with standard USB 2.0 hosts and backward compatible with USB 1.1/1.0.
- Supported operating systems include Windows (98 through 8.1, CE5.0–7.0), Linux, Mac OS, and Android.
- Recognized as “High-Speed USB Multi Serial Compound Device” in Windows Device Manager.

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### 5. Components & Accessories

Included Items:
- TRP-C08H USB to 2×RS232 and 2×RS422/485 Isolated Converter unit
- USB 2.0 Type A to Type B cable
- Driver and utility CD (includes TRPCOM.exe test software and drivers for multiple OS platforms)
- User manual and installation guide

Optional Accessories:
- DIN-rail mounting kit
- Panel mounting brackets
- External DC power adapter (for EXT PWR mode)
- Screw terminal connectors for RS-422/485 wiring

Connectors:
- USB Port: Type B female connector
- RS-232 Ports: Two DB-9 male connectors (DTE configuration)
- RS-422/485 Ports: Two 4-pin terminal blocks supporting AWG #12–30 wire gauge

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### 6. Installation & Setup

Hardware Installation:
1. Mounting: Secure the TRP-C08H using the included DIN-rail clip or panel mount brackets.
2. USB Connection: Connect the converter to the host PC using the supplied USB 2.0 A/B cable.
3. Power Selection:
- Set the power selection switch to “USB PWR” for USB-powered operation.
- Set to “EXT PWR” to use an external DC adapter or screw terminal power input.
4. Serial Device Connection:
- Connect RS-232 devices via DB-9 connectors.
- Connect RS-422/485 devices via terminal blocks, observing correct polarity and wiring configuration.
5. LED Indicators: Verify that the PWR LED is lit and TX/RX LEDs blink during communication.

Software Installation:
- Insert the driver CD and run the appropriate installer (MSSetup.exe) for your operating system.
- Follow on-screen prompts; ignore unsigned driver warnings if applicable.
- After installation, connect the TRP-C08H to the USB port. The system will automatically detect and assign COM port numbers.
- Verify installation via Device Manager under “Ports (COM & LPT).”

Configuration:
- Each COM port can be configured independently using standard serial communication settings (baud rate, parity, data bits, stop bits).
- Use the included TRPCOM.exe utility for loopback testing and communication verification.

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### 7. Performance & Capabilities

Data Throughput:
- Supports baud rates from 300 bps to 256 Kbps with automatic detection and switching.
- Each port operates independently, allowing simultaneous multi-protocol communication.

Isolation & Protection:
- 3000 VDC optical isolation ensures safe operation in environments with high ground potential differences.
- ±15 kV ESD protection and surge suppression safeguard both converter and connected devices.

Power Efficiency:
- Consumes approximately 260 mA from the USB bus, minimizing power draw from the host system.
- Optional external power input available for high-load applications.

Communication Distance:
- RS-422/485 supports up to 4000 ft (1250 m) transmission distance, ideal for long-range industrial communication.

Reliability:
- Internal surge protection and robust aluminum housing enhance durability.
- Wide operating temperature range (0–65°C) supports deployment in industrial and field environments.

Limitations:
- Maximum baud rate limited to 256 Kbps.
- RS-485 operates in half-duplex mode only.
- External power supply required if USB power is insufficient for connected devices.

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### 8. Standards & Compliance

- USB Compliance: Fully compliant with USB 2.0 specification; backward compatible with USB 1.1/1.0.
- Electrical Isolation: 3000 VDC optical isolation per industrial safety standards.
- ESD Protection: ±15 kV per IEC 61000-4-2 standard.
- Surge Protection: Integrated transient voltage suppression on RS-422/485 lines.
- Environmental Compliance: RoHS-compliant materials and construction.
- Operating Standards: Meets industrial communication interface standards for RS-232, RS-422, and RS-485.
- Certifications: CE and FCC Class A (typical for Trycom industrial converters).

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### 9. Additional Information

Warranty:
- Standard manufacturer warranty (typically 1 year) covering defects in materials and workmanship.
- Warranty void if product is modified, misused, or damaged by improper installation.

Technical Support:
- Trycom provides driver updates, test utilities, and documentation via [www.trycom.com.tw](http://www.trycom.com.tw).
- Email and phone support available for installation and troubleshooting assistance.

Maintenance:
- No routine maintenance required.
- Periodically inspect connectors and wiring for corrosion or mechanical wear.
- Keep device free from dust and moisture; operate within specified environmental limits.

Firmware & Software Updates:
- Updated drivers and utilities available for download from Trycom’s support portal.
- TRPCOM.exe utility supports loopback and communication testing for all serial modes.

Testing & Diagnostics:
- Built-in LED indicators for quick visual diagnostics.
- TRPCOM.exe software enables RS-232, RS-422, and RS-485 loopback tests and communication verification.
- Supports command-based testing with compatible Trycom devices (e.g., TRP-C28).

Typical Deployment Scenarios:
- Integration of legacy serial equipment into modern USB-based control systems.
- Industrial automation networks requiring isolated serial communication.
- Laboratory and field data acquisition systems.
- Multi-protocol serial communication hubs for embedded systems.

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### Summary

The Trycom TRP-C08H USB to 2×RS232 and 2×RS422/485 Isolated Converter is a robust, high-performance communication interface designed for industrial and laboratory environments requiring reliable, isolated serial connectivity. With its 3000 VDC isolation, ±15 kV ESD protection, and automatic configuration capabilities, it simplifies integration of multiple serial devices into modern USB-based systems. Its compact, DIN-rail mountable design, wide OS compatibility, and flexible power options make it an ideal solution for engineers, system integrators, and automation professionals seeking dependable multi-port serial communication in demanding applications.