Comprehensive Product Summary – TRP-C08M USB to 4-Port RS232/422/485 Isolated Converter

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### 1. Product Overview

Product Name: TRP-C08M
Model: TRP-C08M
Series: TRP Industrial Communication Converter Series
Article Number: TRP-C08M
Manufacturer: Trycom Technology Co., Ltd.
Manufacturer Address: No. 35, Zhongxing Rd., Guishan Township, Taoyuan County 333, Taiwan
Website: [www.trycom.com.tw](http://www.trycom.com.tw)
Contact: Tel: +886-3-350-3351 | Fax: +886-3-350-3352

The Trycom TRP-C08M is a high-performance USB 2.0 to 4-port RS232/RS422/RS485 isolated converter designed for industrial and automation environments. It provides robust electrical isolation, surge protection, and flexible communication capabilities, enabling reliable data exchange between USB-enabled host systems and multiple serial devices. The converter supports full PLC communication compatibility and is engineered for use in harsh industrial conditions requiring stable, interference-free serial communication.

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### 2. Key Features

- Multi-Port Serial Conversion: Converts one USB 2.0 interface into four independent serial communication ports supporting RS232, RS422, or RS485 standards.
- 3KV Isolation: Each serial port is galvanically isolated up to 3KV DC, protecting connected devices from ground loops and electrical surges.
- Surge and ESD Protection: RS422/485 lines are protected against surges, short circuits, and ±15KV ESD; RS232 lines are protected against ±15KV ESD.
- Automatic Interface Selection: The converter automatically detects and switches between RS232, RS422, and RS485 modes based on wiring configuration.
- Independent Port Configuration: Each of the four ports can be configured independently for baud rate, data format, and communication parameters.
- Wide Baud Rate Range: Supports standard and custom baud rates from 75 bps up to 921.6 Kbps.
- Auto Direction Flow Control: Built-in automatic data direction control for RS485 communication ensures seamless half-duplex operation.
- FIFO Buffers: On-chip 512-byte FIFO for upstream and downstream data transfer per port, plus 256-byte internal buffering for smooth data flow.
- Dual Power Input Options: Operates from USB bus power or external DC power supply with over-voltage protection.
- LED Indicators: Dedicated LEDs for power and TX/RX activity on each port (COM A–D) for easy status monitoring.
- Mounting Flexibility: Supports both DIN-rail and panel mounting for industrial installations.
- Cross-Platform Driver Support: Compatible with Windows (98/ME/2000/XP/Vista/7/8.1/CE5.0–7.0), Linux, Mac OS, and Android operating systems.
- Full PLC Compatibility: Tested with major PLC brands such as Mitsubishi Q, FX, and FATEK series.
- Industrial-Grade Design: Rugged enclosure and wide operating temperature range (-10°C to 60°C) suitable for factory automation and field applications.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Input Interface | USB 2.0 Type B (compliant with USB 1.0/1.1/2.0 standards) |
| Output Interfaces | 4 × RS232/RS422/RS485 isolated serial ports |
| Isolation Voltage | 3KV DC between USB and serial ports |
| RS232 Signal Lines | TXD, RXD, RTS, CTS, ISO GND (16C450/16C550 compatible) |
| RS422 Signal Lines | TX+, TX−, RX+, RX− (4-wire full duplex differential) |
| RS485 Signal Lines | D+, D− (2-wire half duplex differential) |
| Communication Speed | 75 bps to 921.6 Kbps (auto baud rate switching) |
| Data Bits | 5, 6, 7, or 8 bits |
| Stop Bits | 1, 1.5, or 2 bits |
| Parity Options | None, Odd, Even, Mark, Space |
| Flow Control | Xon/Xoff (software), RTS/CTS (hardware), or None |
| Distance (RS422/485) | Up to 4000 ft (1250 m) |
| Line Protection | ±15KV ESD, surge, and short-circuit protection |
| Power Input Options | USB bus power or external DC input (via screw terminal) |
| Power Consumption | 190 mA (typical, USB powered) |
| Indicators | Power (PWR), TX/RX LEDs for COM A–D |
| Mounting Options | DIN-rail or panel mount |
| Connection Type | Screw terminal block (AWG #12–30) |
| Operating Temperature | -10°C to +60°C |
| Storage Temperature | -20°C to +65°C |
| Humidity | 10–90% RH, non-condensing |
| Dimensions | 151 mm (L) × 111 mm (W) × 26 mm (H) |
| Weight | 395 g (net), 691 g (with packaging) |
| Enclosure Material | Industrial-grade metal housing |
| Compliance | CE, FCC (implied industrial compliance) |

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### 4. Functionality

The TRP-C08M functions as a USB-to-multi-serial bridge, enabling a host computer to communicate with up to four serial devices simultaneously. Each port can independently operate as RS232, RS422, or RS485, allowing mixed-protocol environments. The converter automatically detects the wiring configuration and switches the interface mode accordingly.

Typical Use Cases:
- Industrial automation and control systems
- PLC communication and programming
- SCADA and data acquisition systems
- Serial device networking and monitoring
- Laboratory instrumentation and testing
- Building automation and environmental monitoring

Compatibility:
- Fully compatible with major PLCs (Mitsubishi Q/FX, FATEK, etc.)
- Works with standard serial communication software and terminal emulators
- Supports Windows, Linux, Mac OS, and Android platforms

Operation Principle:
The USB 2.0 interface provides a high-speed data channel to the host PC. Internally, the TRP-C08M’s USB controller translates USB packets into serial data streams for each port. Each port’s isolation circuitry ensures electrical separation, preventing ground loops and protecting connected equipment. The converter’s firmware manages automatic baud rate detection, flow control, and direction switching for RS485 communication.

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### 5. Components & Accessories

Included Items:
- TRP-C08M converter unit
- USB 2.0 Type A to Type B cable
- Driver and utility CD (includes TRPCOM.exe test software)
- User manual (Rev. 1.2, September 2014)

Optional Accessories:
- External DC power adapter (for external power mode)
- DIN-rail mounting kit
- Screw terminal connectors for field wiring

Connectors:
- USB Port: Type B female connector
- Serial Ports: Screw terminal blocks supporting AWG #12–30 wires
- Power Terminal: Screw terminal for external DC input

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### 6. Installation & Setup

Hardware Installation Steps:
1. Driver Installation:
- Insert the provided CD or download the latest drivers from Trycom’s website.
- Run the appropriate installer (e.g., *MSSetup.exe*) for your operating system.
- Follow on-screen prompts to complete installation.
- For Windows systems, ignore unsigned driver warnings and proceed with installation.

2. Device Connection:
- Connect the TRP-C08M to the host PC using the supplied USB cable.
- The system will automatically detect the device and assign COM port numbers.
- Verify installation via Device Manager under “Ports (COM & LPT)”.

3. Power Selection:
- Locate the power selection DIP switch near the USB port.
- Set to “USB PWR” for USB bus power or “EXT PWR” for external DC input.
- When using external power, connect the DC adapter or terminal block input.

4. Serial Wiring:
- RS232: Connect TXD, RXD, RTS, CTS, and GND as required.
- RS422: Connect TX+, TX−, RX+, RX− for full-duplex communication.
- RS485: Connect D+ and D− for half-duplex communication.

5. Mounting:
- Install the converter on a DIN rail or secure it to a panel using mounting screws.

Software Configuration:
- After installation, each port appears as a separate COM port.
- Configure baud rate, parity, data bits, and stop bits using your communication software.
- Use the included TRPCOM.exe utility for loopback and communication testing.

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### 7. Performance & Capabilities

- Speed: Supports baud rates from 75 bps to 921.6 Kbps with automatic detection.
- Capacity: Four independent serial channels, each configurable and isolated.
- Efficiency: 512-byte FIFO buffers per port ensure smooth data flow with minimal latency.
- Reliability: 3KV isolation and surge protection guarantee stable operation in noisy environments.
- Distance: RS422/485 communication up to 1250 meters (4000 feet).
- Power Efficiency: Consumes only 190 mA from USB power, minimizing load on host systems.
- Limitations:
- RS485 supports half-duplex communication only.
- Total cable length and baud rate are inversely related; higher speeds require shorter cables.
- External power recommended for full load operation with all ports active.

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### 8. Standards & Compliance

- Electrical Isolation: 3KV DC isolation between USB and serial ports.
- ESD Protection: ±15KV ESD protection on all serial lines.
- Surge Protection: Built-in surge suppression on RS422/485 lines.
- USB Compliance: Fully compliant with USB 2.0 specification; backward compatible with USB 1.1/1.0.
- Industrial Standards: Meets industrial-grade EMC and safety requirements for automation systems.
- Operating System Support:
- Windows 98/ME/2000/XP/Vista/7/8.1/CE5.0–7.0
- Linux (kernel 2.4 and above)
- Mac OS
- Android
- Regulatory Compliance: CE and FCC (implied through Trycom’s industrial product line).

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### 9. Additional Information

Warranty:
Standard manufacturer warranty (typically one year, as per Trycom policy) covering defects in materials and workmanship.

Technical Support:
Trycom provides technical assistance via email, phone, and online resources. Updated drivers, manuals, and test utilities are available on the official website.

Maintenance:
- Periodically inspect terminal connections for corrosion or looseness.
- Ensure proper grounding and shielding in high-interference environments.
- Keep ventilation openings clear to maintain optimal operating temperature.

Firmware & Software Updates:
Driver and firmware updates are periodically released to enhance compatibility and performance. Users can download the latest versions from Trycom’s support page.

Testing & Diagnostics:
The included TRPCOM.exe utility allows users to perform loopback tests for RS232, RS422, and RS485 interfaces. It provides real-time monitoring of transmitted and received data, ensuring proper configuration and functionality.

Example Test Procedures:
- RS232 Loopback: Connect TXD to RXD and verify data echo using TRPCOM.exe.
- RS422 Loopback: Connect TX+ to RX+ and TX− to RX− for full-duplex verification.
- RS485 Test: Connect to another RS485 device (e.g., TRP-C28) and exchange test commands.

Environmental Considerations:
Designed for industrial environments with wide temperature and humidity tolerance. Suitable for installation in control cabinets, factory floors, and field enclosures.

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### Summary

The Trycom TRP-C08M USB to 4-Port RS232/422/485 Isolated Converter is a robust, industrial-grade communication interface designed to bridge modern USB systems with legacy serial equipment. Its combination of 3KV isolation, surge protection, and flexible configuration makes it ideal for automation, control, and data acquisition applications. With support for multiple operating systems, independent port configuration, and reliable performance across a wide range of conditions, the TRP-C08M delivers a dependable solution for engineers and system integrators requiring secure, multi-channel serial connectivity in demanding environments.