1. Product Overview

Product Name: APort602
Model: APort602
Series: APORT Series – IP to Serial Port Converters
Article Number: APort602
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)

The APort602 is a high-performance IP Device Server designed to convert Ethernet-based TCP/IP or UDP/IP communication into multiple serial interfaces. It provides six RS232 ports and two ground-isolated RS422/RS485 ports, enabling seamless integration of serial devices into IP-based networks. Built on a 32-bit 100 MHz MIPS RISC CPU with 16 MB Flash ROM and 16 MB SDRAM, the APort602 delivers reliable, high-speed serial communication up to 230.4 kbps per port. It is part of Rayon’s APORT family of industrial-grade IP-to-serial converters, optimized for automation, control, and data acquisition systems.

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2. Key Features

- Multi-Port Serial Connectivity:
Provides 8 total serial ports – six RS232 and two ground-isolated RS422/RS485 ports (DB9 male connectors).

- High-Performance Embedded Processor:
Equipped with a 32-bit 100 MHz MIPS RISC CPU, offering superior performance compared to 16-bit architectures.

- Flexible Network Interface:
Supports 10/100 Mbps Ethernet (100Base-T) with auto-detection via RJ45 connector.

- Versatile Communication Protocols:
Operates over TCP/IP or UDP/IP, supporting both server and client modes for flexible network integration.

- Cross-Platform Driver Support:
- Windows NT/2000/XP/Vista/7: Virtual COM port drivers (APORT or TPORT mode).
- Linux/UNIX: Raw TTY (GVMODEM) and real TTY (RTTY) drivers.
- SCO UNIX: Real TTY driver support.

- Multiple Operating Modes:
Each serial port can be configured independently for:
- COM Real TTY mode
- GVMODEM Real TTY mode
- TCP Server mode
- TCP Client mode
- UDP Send/Receive mode
- UDP Multi-Serial mode

- Ground Isolation:
RS422/RS485 ports are galvanically isolated to prevent ground loops and electrical interference.

- Auto Data Direction Control:
In RS485 mode, automatic data direction control simplifies half-duplex communication.

- Web, Telnet, and Console Configuration:
Supports configuration via web browser, Telnet, or serial console.

- Firmware Upgradeable:
Firmware can be updated via TFTP in upgrade mode, ensuring long-term maintainability.

- Compact Industrial Design:
Rugged metal enclosure with compact dimensions suitable for DIN-rail or panel mounting.

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3. Technical Specifications

Processor & Memory:
- CPU: 32-bit MIPS RISC, 100 MHz
- Flash ROM: 16 MB
- SDRAM: 16 MB

Serial Interfaces:
- Total Ports: 8
- RS232 Ports: 6 (Serial Ports 1–6)
- RS422/RS485 Ports: 2 (Serial Ports 7–8, ground-isolated)
- Connector Type: DB9 male
- Maximum Baud Rate: 230,400 bps
- Signal Pins (RS422/485): TX+, TX–, RX+, RX–, Isolated GND
- Interface Selection: DIP switch configurable (RS422 or RS485)
- Auto Data Direction Control: Supported in RS485 mode
- Console Port: Shared with Serial Port 1

Network Interface:
- Ethernet: 10/100 Mbps, 100Base-T
- Connector: RJ45
- Auto-detecting 10/100 Mbps operation

Power Requirements:
- Input Voltage: 5 VDC
- Current Consumption: 1200 mA
- Power Adapter: UP110/UP220 (regulated 5 VDC supply only)

Physical Characteristics:
- Dimensions: 205 × 135 × 48 mm
- Weight: Approx. 0.8 kg (typical)
- Enclosure Material: Metal (Rayon industrial-grade housing)

Environmental Conditions:
- Operating Temperature: 5°C to 40°C
- Storage Temperature: 0°C to 65°C
- Operating Humidity: 10–90% RH (non-condensing)
- Storage Humidity: 5–90% RH

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4. Functionality

The APort602 functions as an IP-to-serial converter, bridging Ethernet networks and serial devices. Each serial port can be independently configured for different communication modes, allowing simultaneous operation of multiple protocols.

Operating Modes:
- TCP Server Mode:
The APort602 listens for incoming TCP connections on assigned port numbers. Ideal for remote terminal access or SCADA systems.

- TCP Client Mode:
Initiates connections to a designated server IP and port, suitable for centralized data collection.

- UDP Mode:
Supports both unicast and multicast UDP communication, enabling data broadcast to up to four remote hosts.

- UDP Multi-Serial Mode:
Allows multiple serial ports to share the same UDP port number for simultaneous data distribution.

- Real TTY Modes:
- COM Real TTY: Uses UDP packets for Windows or SCO UNIX virtual COM operation.
- GVMODEM Real TTY: Uses TCP packets for Linux/UNIX fixed TTY devices.

Configuration Interfaces:
- Web Browser: HTTP-based configuration (default IP: 192.168.1.254, password: 11111).
- Telnet: Command-line configuration and diagnostics.
- Console Port: Serial terminal access for setup and firmware management.

Use Cases:
- Industrial automation and control systems
- Remote serial device management
- SCADA and HMI integration
- Data acquisition and monitoring
- Serial-over-IP communication for legacy equipment

Compatibility:
- Compatible with Windows, Linux, and UNIX systems.
- Supports integration with third-party COM redirectors (e.g., Tactical Software COM Redirector, CKermit 8.0).

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5. Components & Accessories

Included Items:
- APort602 main unit
- UP110/UP220 5VDC power adapter
- User manual and software CD (drivers, utilities, firmware tools)

Optional Accessories:
- DIN-rail mounting kit
- RS232/RS485/RS422 cables
- Console cable (DB9)
- Replacement power adapter

Connectors:
- Ethernet: RJ45 (10/100Base-T)
- Serial: 8 × DB9 male connectors
- Power: Barrel-type DC input jack (5VDC)

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6. Installation & Setup

Hardware Installation:
1. Connect the APort602 to a network hub or switch using a standard Ethernet cable.
2. Connect serial devices to the DB9 ports (1–8).
3. Configure DIP switches:
- Bit 1: Console port enable (ON) / normal serial port (OFF)
- Bit 2: Firmware upgrade mode (ON) / normal operation (OFF)
- Bit 3: RS422 (ON) / RS485 (OFF) for port 7
- Bit 4: RS422 (ON) / RS485 (OFF) for port 8
4. Apply 5VDC power using the supplied adapter.
5. Verify LED indicators for power and LAN link status.

Software Setup:
- Access via web browser (default IP 192.168.1.254).
- Configure network parameters (static IP recommended).
- Assign serial port modes and communication parameters.
- Save and restart the device to apply settings.

Driver Installation:
- Windows:
- Use `aport_ap.exe` or `tport_ap.exe` utilities to map virtual COM ports.
- Install APORT or TPORT drivers depending on mode.
- Supported OS: Windows NT, 2000, XP, Vista, 7.
- Linux/UNIX:
- Install `gvmodem` or `rtty` drivers for fixed or real TTY operation.
- Configure `/etc/gtstcpd/gtstcpd.cf` for IP and port mapping.
- SCO UNIX:
- Use `rtty100.tar` package and configure `/etc/nasd.rc`.

Firmware Upgrade:
- Set DIP switch bit 2 to ON (upgrade mode).
- Connect via console terminal (115200 bps, 8N1).
- Use TFTP client to upload new firmware (default IP 192.168.1.254).
- Verify version via web interface or console.

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7. Performance & Capabilities

- Serial Speed: Up to 230.4 kbps per port
- Network Throughput: 10/100 Mbps auto-negotiation
- Latency: Dependent on network conditions; optimized for low-latency serial data exchange
- Concurrent Connections: Each serial port can handle independent TCP/UDP sessions
- Buffering: Internal buffering managed by embedded Linux system
- Reliability: Continuous operation supported by watchdog and heart-beat mechanisms in TPORT driver
- Limitations:
- TCP latency may affect time-critical applications.
- Only one host can occupy a serial port in TPORT mode; use RPORT driver for multi-host access.

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8. Standards & Compliance

- Network Standards: IEEE 802.3 10/100Base-T Ethernet
- Serial Standards: EIA/TIA RS232, RS422, RS485
- Protocol Support: TCP/IP, UDP/IP, RFC2217 (Telnet COM Port Control)
- Operating System Compatibility: Windows NT/2000/XP/Vista/7, Linux, UNIX, SCO OpenServer
- Safety & EMC: Designed for industrial environments with ground isolation on RS422/485 ports
- Firmware Environment: Embedded Linux operating system

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9. Additional Information

Warranty:
- Standard 1-year limited warranty covering defects in materials and workmanship.
- Excludes damage from misuse, electrical surges, or unauthorized servicing.
- Out-of-warranty repairs available at a flat-rate service charge.

Support & Maintenance:
- Technical support via email (rayon@ms1.hinet.net).
- Firmware updates and driver downloads available from Rayon’s website.
- RMA (Return Material Authorization) required for repairs; contact Rayon Service Center for authorization.

Maintenance Recommendations:
- Use only the supplied 5VDC adapter.
- Avoid exposure to extreme temperatures or humidity.
- Periodically check firmware version and update as needed.
- Use surge protection for network and power lines in industrial environments.

Software Utilities Provided:
- `aport_ap.exe` / `tport_ap.exe`: Virtual COM configuration tools
- `aport_search.exe` / `tport_search.exe`: Network discovery utilities
- `wftp8.exe`: Firmware upgrade utility
- `Teraterm`: Terminal emulator for console access

Related Models in APORT Series:
- APORT200: 2 × RS232
- APORT020: 2 × isolated RS232
- APORT101: 1 × RS232 + 1 × isolated RS422/485
- APORT400: 4 × RS232
- APORT040: 4 × isolated RS232
- APORT202: 2 × RS232 + 2 × isolated RS422/485
- APORT022: 2 × isolated RS232 + 2 × isolated RS422/485
- APORT800: 8 × RS232
- APORT620: 6 × RS232 + 2 × isolated RS232
- APORT602: 6 × RS232 + 2 × isolated RS422/485 (this model)

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Summary

The Rayon APort602 is a robust, Linux-based IP-to-Serial Device Server engineered for industrial and enterprise applications requiring multiple serial interfaces over Ethernet. With six RS232 and two isolated RS422/RS485 ports, it supports flexible communication modes, cross-platform drivers, and web-based configuration. Its 32-bit RISC CPU, 16 MB memory, and auto-sensing 10/100 Mbps Ethernet ensure reliable, high-speed data transfer. The APort602 is ideal for integrating legacy serial equipment into modern IP networks, offering scalability, configurability, and long-term support from Rayon Technology.