1. Product Overview

Product Name: APort020
Model: APort020
Series: APORT Series – IP to Serial Port Converters
Article Number: APort020
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 Rayon APort020 is a compact, industrial-grade IP Device Server designed to convert Ethernet-based TCP/IP or UDP/IP communication into two isolated RS232 serial interfaces. It enables remote serial device connectivity over standard IP networks, providing a reliable and secure bridge between legacy serial equipment and modern Ethernet infrastructures. The APort020 belongs to Rayon’s APORT series, which includes models supporting various combinations of RS232, RS422, and RS485 interfaces.

---

2. Key Features

- Dual Ground-Isolated RS232 Ports: Two independent RS232 DB9 male connectors with galvanic isolation to prevent ground loops and electrical interference.
- 10/100 Mbps Ethernet Interface: Auto-detecting 10/100Base-T RJ45 port for flexible LAN integration.
- High-Performance Embedded CPU: 32-bit 100 MHz MIPS RISC processor for efficient data handling and low latency.
- Integrated Memory: 16 MB Flash ROM and 16 MB SDRAM for firmware, buffering, and network stack operations.
- Multi-Protocol Support: Operates in TCP Server, TCP Client, UDP Send/Receive, and UDP Multi-Serial modes.
- Cross-Platform Drivers:
- Windows NT/2000/XP/Vista/7 virtual COM port driver (APORT or TPORT mode)
- Linux raw TTY (GVMODEM) driver
- SCO UNIX real TTY (RTTY) driver
- Web, Telnet, and Console Configuration: Multiple management interfaces for setup and monitoring.
- Ground Isolation: Ensures reliable communication in electrically noisy environments.
- Compact Design: Small form factor suitable for DIN-rail or desktop installation.
- Firmware Upgradeable: Supports TFTP-based firmware updates via console or network.
- LED Indicators: Status LEDs for power, LAN link/activity, and serial port TX/RX activity.
- Low Power Consumption: Operates on 5 VDC at 1200 mA.
- Operating Environment: Designed for industrial and office environments (5–40°C, 10–90% RH).

---

3. Technical Specifications

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

Network Interface
- Ethernet: 10/100 Mbps auto-sensing (100Base-TX)
- Connector: RJ45
- Protocols Supported: TCP/IP, UDP/IP, HTTP, Telnet, TFTP

Serial Interfaces
- Type: Ground-isolated RS232
- Connector: DB9 male (x2)
- Port Count: 2
- Baud Rate: Up to 230,400 bps
- Console Port: Shared with Serial Port 1
- Isolation: Electrical ground isolation between serial ports and system ground

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

Physical Characteristics
- Dimensions: 92 × 118 × 27 mm
- Weight: Approx. 0.3 kg (typical)
- Material: Industrial-grade metal enclosure (Rayon standard 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

---

4. Functionality

The APort020 functions as an IP-to-Serial converter, enabling Ethernet-based systems to communicate with serial devices such as PLCs, sensors, barcode scanners, and industrial controllers. It encapsulates serial data into TCP or UDP packets for transmission over IP networks and decapsulates received packets back into serial data streams.

Operating Modes:
- TCP Server Mode: The APort020 listens for incoming TCP connections on assigned port numbers, allowing remote clients to connect and exchange serial data.
- TCP Client Mode: The device initiates a TCP connection to a predefined server IP and port, suitable for centralized data collection.
- UDP Mode: Supports both send and receive operations, allowing broadcast or multicast communication to up to four remote hosts.
- UDP Multi-Serial Mode: Enables multiple serial ports to share the same UDP port number for simultaneous data distribution.
- Real TTY Modes:
- *COM Real TTY Mode* (UDP-based) for Windows and SCO UNIX systems.
- *GVMODEM Real TTY Mode* (TCP-based) for Linux/UNIX systems.

Configuration Interfaces:
- Web Interface: Accessible via browser (default IP: 192.168.1.254, password: 11111).
- Telnet Interface: Command-line configuration and diagnostics.
- Console Interface: RS232 terminal access via Serial Port 1 (115200 bps, 8N1).

Compatibility:
- Windows NT/2000/XP/Vista/7 (Virtual COM via APORT or TPORT driver)
- Linux (GVMODEM driver)
- SCO UNIX (RTTY driver)
- Compatible with standard serial communication software and protocols (e.g., MODBUS, SCADA, HMI systems).

---

5. Components & Accessories

Included Items:
- APort020 main unit
- UP110 or UP220 5VDC power adapter
- User manual and software CD (includes drivers and utilities)

Optional Accessories:
- DIN-rail mounting kit
- Console cable (DB9 to DB9 or DB9 to RJ45, depending on setup)
- Ethernet cable (Cat5e or higher)

Connectors:
- LAN: RJ45 (10/100Base-TX)
- Serial Ports: DB9 male (x2)
- Power: Barrel-type DC jack (5V input)

---

6. Installation & Setup

Hardware Installation Steps:
1. Connect the APort020 to a network hub or switch using a standard Ethernet cable.
2. Connect serial devices to the DB9 male connectors (Serial Port 1 and 2).
3. Configure DIP switch bit 1 to select console or normal serial mode for Port 1.
4. Apply 5VDC power using the supplied adapter.
5. Observe LED indicators for power and link status.

Software Setup:
- Use aport_ap.exe or tport_ap.exe utilities to detect and configure APort devices on the LAN.
- Assign static IP address, subnet mask, and gateway.
- Configure serial port parameters (baud rate, data bits, parity, stop bits, flow control).
- Select desired operating mode (TCP Server, TCP Client, UDP, etc.).
- Save configuration and reboot the device.

Driver Installation (Windows):
- Run ainstall.exe (APORT mode) or tinstall.exe (TPORT mode).
- Map virtual COM ports to APort serial ports using the configuration utility.
- Verify COM port availability in Device Manager.

Firmware Upgrade:
- Set DIP switch bit 2 to ON to enter firmware upgrade mode.
- Use TFTP client or Rayon’s wftp8.exe utility to upload new firmware (default IP: 192.168.1.254).

---

7. Performance & Capabilities

- Data Rate: Up to 230.4 kbps per serial port.
- Network Throughput: 10/100 Mbps auto-negotiation.
- Latency: Optimized for low-latency serial-to-IP conversion; actual latency depends on network conditions.
- Buffering: Internal memory buffers ensure smooth data flow even under transient network delays.
- Reliability: Continuous operation supported by embedded Linux OS and watchdog mechanisms.
- Isolation: Ground isolation prevents signal degradation and protects connected equipment.
- Limitations:
- Console port shares Serial Port 1 (cannot be used simultaneously).
- TPORT driver supports single dedicated Windows host per serial port.
- RPORT driver required for multi-host access scenarios.

---

8. Standards & Compliance

- Ethernet Standards: IEEE 802.3, 802.3u (10/100Base-TX)
- Serial Standards: EIA/TIA RS232
- Network Protocols: TCP/IP, UDP/IP, HTTP, TELNET, TFTP, DHCP (optional), RFC2217 (Telnet COM port control)
- Operating System Compatibility: Windows NT/2000/XP/Vista/7, Linux, SCO UNIX
- Safety & EMC: Designed to meet industrial EMC and safety standards (manufacturer internal compliance).
- Firmware: Embedded Linux-based system with upgradeable firmware.

---

9. Additional Information

Warranty:
- One-year limited warranty covering defects in materials and workmanship.
- Excludes damage from misuse, electrical surges, or unauthorized servicing.

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

Maintenance Recommendations:
- Use only the supplied 5VDC adapter.
- Maintain clean, dry operating conditions.
- Periodically check firmware version and update if necessary.

Related Models in APORT Series:
- APORT200: Ethernet to 2 RS232 ports
- APORT101: Ethernet to 1 RS232 + 1 RS422/485 isolated port
- APORT400: Ethernet to 4 RS232 ports
- APORT040: Ethernet to 4 isolated RS232 ports
- APORT202: Ethernet to 2 RS232 + 2 RS422/485 isolated ports
- APORT800: Ethernet to 8 RS232 ports

Use Cases:
- Industrial automation and SCADA systems
- Remote monitoring and control of serial devices
- POS systems and data acquisition terminals
- Laboratory instrumentation and test equipment integration
- Legacy serial device networking over IP

---

Summary

The Rayon APort020 IP Device Server is a robust, dual-port Ethernet-to-serial converter engineered for industrial and commercial applications requiring reliable serial communication over IP networks. With its 32-bit RISC architecture, dual isolated RS232 interfaces, and comprehensive software support across multiple operating systems, the APort020 provides a flexible and scalable solution for integrating serial devices into modern Ethernet infrastructures. Its combination of hardware isolation, configurable network modes, and cross-platform driver support makes it ideal for automation, control, and data acquisition environments where stability and interoperability are critical.