Comprehensive Product Summary – Trycom TRP‑C37 Ethernet to RS‑232/422/485 Serial Device Server with Watchdog

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### 1. Product Overview

Product Name: TRP‑C37
Model: TRP‑C37
Series: Trycom TRP‑C Industrial Serial Device Server Series
Article Number: TRP‑C37
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)

The Trycom TRP‑C37 is an industrial‑grade Ethernet‑to‑serial communication server designed to connect RS‑232, RS‑422, and RS‑485 serial devices to TCP/IP networks. It integrates a watchdog timer, surge and over‑voltage protection, and multiple operating modes for flexible deployment in automation, monitoring, and control systems. The device is engineered for reliability in harsh industrial environments and supports remote configuration, firmware updates, and multi‑client connectivity.

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### 2. Key Features

- Triple Serial Interface Support: One serial port configurable as RS‑232, RS‑422, or RS‑485, enabling compatibility with a wide range of legacy and modern serial devices.
- Multiple Operating Modes: Supports *Direct IP Mode*, *Virtual COM Mode*, and *Paired Mode* for flexible communication architectures.
- Watchdog Timer: Built‑in hardware watchdog automatically resets the system in case of software or power failure, ensuring continuous operation.
- Wide Power Input Range: Accepts DC +10 V to +30 V input via screw terminal or DC jack, suitable for industrial power systems.
- Auto‑MDIX Ethernet Port: Automatically detects and corrects cable crossover, supporting both straight‑through and crossover RJ‑45 cables.
- High‑Speed Data Transmission: Baud rates from 1200 bps up to 921.6 Kbps, supporting 5–8 data bits, 1–2 stop bits, and parity options (none, even, odd).
- Surge and ESD Protection: ±15 kV ESD protection on serial interfaces; surge, over‑current, and over‑voltage protection on RS‑422/485 lines.
- Multi‑Client Connectivity: Supports up to 16 simultaneous TCP client connections in server mode.
- Heart Beat Function: Periodic connection check (TCP port 5300) ensures link reliability and automatic reconnection.
- Auto Fast Bi‑directional RS‑485 Hardware: Hardware‑based direction control ensures loss‑free, low‑latency RS‑485 communication.
- Configuration Flexibility: Configurable via DSM utility, web browser, or serial console.
- Firmware Upgradeable: Supports firmware updates over LAN.
- Dual Power Input Options: Power via screw terminal block or 5.5 × 2.1 mm DC jack.
- LED Indicators: Power, Link, TX, and RX LEDs provide real‑time status feedback.
- Factory Reset Switch: External DIP switch allows quick restoration of factory defaults.
- Virtual COM Driver Support: Compatible with Windows 98, 2000, XP, Vista, 2003, 7, and 8 operating systems.
- Protocol Compatibility: Fully compliant with Ethernet and TCP/IP protocols including TCP, UDP, IP, ARP, DHCP, Telnet, HTTP, and ICMP.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Power Input Voltage | DC +10 V to +30 V |
| Power Consumption | 12 V / 140 mA |
| Ethernet Interface | 10/100 Mbps Auto‑detecting, Auto‑MDIX |
| Serial Interface | RS‑232 / RS‑422 / RS‑485 (auto‑switching) |
| RS‑232 Signals | TX, RX, RTS, CTS, DTR, DSR, DCD, GND |
| RS‑422 Signals | TX+, TX‑, RX+, RX‑ (full duplex) |
| RS‑485 Signals | DATA+, DATA‑ (half duplex) |
| Data Rate | 1200 bps to 921,600 bps |
| Data Bits | 5, 6, 7, or 8 |
| Stop Bits | 1, 1.5, or 2 |
| Parity | None, Even, Odd |
| Protocols Supported | TCP, IP, ARP, DHCP, Telnet, HTTP, UDP, ICMP |
| ESD Protection | ±15 kV on serial interface |
| Surge Protection | RS‑422/485 lines protected against surge, over‑current, and over‑voltage |
| Operating Temperature | ‑10 °C to +65 °C |
| Humidity | 0 – 90 % RH, non‑condensing |
| Dimensions | 151 mm (L) × 75 mm (W) × 26 mm (H) |
| Weight | 395 g (with packaging) |
| Enclosure Material | Industrial‑grade metal housing |
| Mounting | Desktop or panel mounting |
| LED Indicators | Power (PWR), Link, TX, RX |
| Reset Control | Push‑button reset and DIP switch factory restore |
| External Switch Settings | OFF/OFF: Normal (TCP/VSP); ON/ON: Factory Reset; other combinations: optional modes |

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### 4. Functionality

The TRP‑C37 functions as a bridge between Ethernet networks and serial devices, enabling remote access, monitoring, and control of serial equipment over TCP/IP. It supports three primary operating modes:

1. Direct IP Mode:
The serial device communicates directly with a remote host via a defined IP address and port. Ideal for point‑to‑point or client‑server applications.

2. Virtual COM Mode:
The TRP‑C37 creates a virtual COM port on a Windows PC using the provided Virtual‑COM utility. This allows legacy serial applications to communicate over Ethernet as if connected locally.

3. Paired Mode:
Two TRP‑C37 units can be configured to form a transparent serial tunnel over Ethernet, effectively replacing long serial cables with a network link.

Use Cases and Applications:
- Industrial automation and SCADA systems
- Remote monitoring of PLCs, sensors, and controllers
- Serial device networking for Modbus RTU/TCP integration
- Data acquisition systems
- Building management and environmental monitoring
- Legacy serial equipment networking over Ethernet

Compatibility:
Supports Modscan32, Modbus Poll, and other Modbus‑based applications. Works with Windows operating systems via Virtual‑COM drivers and supports TCP/IP‑based communication with any networked host.

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### 5. Components & Accessories

Included Components:
- TRP‑C37 main unit
- User manual (printed or digital)
- TRP‑Serial support CD containing DSM utility, Virtual‑COM driver, TRPCOM test utility, and console software
- Mounting hardware (if applicable)

Connectors:
- Ethernet Port: RJ‑45, Auto‑MDIX, 10/100 Mbps
- Serial Port: DB‑9 male connector for RS‑232; screw terminal block for RS‑422/485
- Power Input: Screw terminal block and 5.5 × 2.1 mm DC jack (select one input method only)
- DIP Switch: Two‑position switch for mode selection and factory reset
- Reset Button: Manual reboot control

Optional Accessories:
- External DC power adapter (10–30 V DC)
- RS‑232 null‑modem cable
- RS‑422/485 wiring harness (AWG #12–30)
- DIN‑rail mounting kit (if required)

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### 6. Installation & Setup

Power Connection:
Connect a DC power source (10–30 V DC) to either the screw terminal or DC jack. *Do not use both simultaneously.* The PWR LED will blink when the system is ready.

Network Connection:
Connect the Ethernet port to a LAN switch, router, or PC using a standard RJ‑45 cable. The LINK LED will illuminate when a valid connection is established. Auto‑MDIX allows use of either straight‑through or crossover cables.

Serial Connection:
- RS‑232: Connect via DB‑9 male connector using a null‑modem cable (max 15 m).
- RS‑422/485: Connect via screw terminal block using twisted‑pair wiring (max 1.2 km).

Configuration Methods:
1. DSM Utility (TRP‑C37X DSM):
- Detects devices on LAN
- Configures IP, port, and serial parameters
- Saves/loads configuration files
- Performs firmware upgrades

2. Web Interface:
- Access via browser using device IP (default 192.168.1.1)
- Configure network, serial, and system settings

3. Serial Console:
- Connect via DB‑9 port and run CONSOLE.EXE from support CD
- Configure parameters through text‑based interface

Factory Reset:
Set DIP switch to ON/ON position to restore factory defaults.

Virtual‑COM Installation:
- Install VCOMM.EXE from the support CD.
- Create virtual COM ports mapped to TRP‑C37 IP and port.
- Supports up to 512–1024 virtual ports across multiple PCs.
- Optionally auto‑start with Windows for persistent connections.

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### 7. Performance & Capabilities

- Data Throughput: Up to 921.6 Kbps serial data rate.
- Network Speed: 10/100 Mbps Ethernet auto‑negotiation.
- Client Connections: Up to 16 simultaneous TCP clients in server mode.
- Latency: Optimized for low‑latency serial‑to‑Ethernet conversion.
- RS‑485 Direction Control: Hardware‑based automatic switching ensures no data loss.
- Reliability Features:
- Watchdog timer for automatic recovery from system crashes.
- Power detection circuit prevents boot failure under unstable voltage.
- Heart Beat function for continuous link verification.
- Auto‑reconnection after power or network failure.
- Environmental Tolerance: Operates reliably from ‑10 °C to +65 °C and up to 90 % RH non‑condensing.
- Limitations: Single serial port; only one interface (RS‑232/422/485) active at a time.

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### 8. Standards & Compliance

- Ethernet Standards: IEEE 802.3 10BASE‑T / 100BASE‑TX
- Protocols Supported: TCP, UDP, IP, ARP, DHCP, Telnet, HTTP, ICMP
- Electrical Protection: ±15 kV ESD protection (IEC 61000‑4‑2 equivalent)
- Surge Protection: Integrated transient suppression on RS‑422/485 lines
- Environmental Compliance: Designed for industrial operating conditions
- Software Compatibility: Windows 98/2000/XP/Vista/2003/7/8
- Firmware Upgradeability: LAN‑based firmware update supported
- Safety Notice: Only one power input (DC jack or terminal) should be used at a time

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### 9. Additional Information

Warranty:
Standard manufacturer warranty (duration subject to Trycom policy). Covers defects in materials and workmanship under normal use.

Technical Support:
Trycom provides technical assistance via telephone, fax, and online resources. Firmware updates and utilities are available from the official website.

Maintenance:
- Periodically inspect connectors and wiring for corrosion or damage.
- Ensure adequate ventilation and avoid exposure to moisture.
- Use surge‑protected power sources in industrial environments.
- Firmware can be updated via LAN using DSM utility.

Firmware & Software Updates:
- DSM Utility and Virtual‑COM drivers are periodically updated for compatibility and performance improvements.
- Firmware versioning follows the format *ABC*, where *AB* corresponds to DSM utility version and *C* to release revision.

Safety & Handling:
- Avoid simultaneous use of both power inputs.
- Ensure proper grounding for surge protection effectiveness.
- Follow wiring guidelines for RS‑422/485 to prevent signal degradation.

Packaging & Shipping:
Each unit is packaged with protective materials to prevent damage during transport. Total package weight approximately 395 g.

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### Summary

The Trycom TRP‑C37 is a robust, feature‑rich Ethernet‑to‑serial converter designed for industrial automation and remote communication applications. It bridges traditional serial interfaces (RS‑232/422/485) with modern Ethernet networks, offering flexible configuration modes, high data integrity, and advanced reliability features such as watchdog recovery and surge protection. With support for up to 16 simultaneous TCP clients, wide power input range, and comprehensive software utilities, the TRP‑C37 provides a dependable solution for integrating serial devices into IP‑based control systems. Its combination of hardware protection, flexible configuration, and industrial‑grade design makes it suitable for demanding environments where continuous operation and data reliability are critical.