Comprehensive Product Summary – APort201 IP Device Server

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### 1. Product Overview

Product Name: APort201
Model: APort201
Series: APORT Series – IP to Serial Port Converter
Article Number: APort201
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 / info@rayontech.com.tw
- Web: [www.rayontech.com.tw](http://www.rayontech.com.tw)

Product Description:
The Rayon APort201 is an industrial-grade IP device server designed to convert Ethernet (10/100Base-TX) communication into serial interfaces, specifically two isolated RS485 slave ports and one local RS232 pass-through port. It enables remote IP access to serial devices, providing a cost-effective and high-performance solution for integrating legacy serial equipment into modern TCP/IP or UDP/IP networks. The device is powered by a 32-bit 100 MHz MIPS RISC CPU with 16 MB Flash ROM and 16 MB SDRAM, ensuring reliable data handling and low-latency communication.

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### 2. Key Features

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

- Multiple Serial Interfaces:
- One local RS232 pass-through port (DB9 male)
- One ground-isolated RS422/RS485 port supporting two remote IP-accessible RS485 channels

- Network Connectivity:
- Auto-detecting 10/100 Mbps Ethernet interface (RJ45 connector)
- Supports both TCP/IP and UDP/IP protocols

- Flexible Communication Modes:
- TCP Server/Client mode
- UDP Send/Receive mode
- Web, Telnet, and console configuration interfaces

- Cross-Platform Driver Support:
- Windows NT/2000/XP/Vista/7/8/10 virtual COM drivers
- Linux raw TTY driver
- SCO UNIX real TTY driver

- Ground Isolation:
- RS485 interface includes galvanic isolation to prevent ground loops and protect connected devices.

- High-Speed Serial Communication:
- Supports baud rates up to 230,400 bps (230.4 kBd)

- Compact Industrial Design:
- Rugged metal enclosure suitable for control environments and industrial automation systems.

- Low Power Consumption:
- Operates at 5 V DC, 1200 mA typical.

- Multi-Host Access:
- Allows one local host and two remote hosts to access the same RS485 device simultaneously, reducing hardware redundancy.

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### 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
- Connector: RJ45
- Protocols: TCP/IP, UDP/IP

Serial Interfaces:
- Port 1: RS232 (local pass-through, DB9 male)
- Port 2: Ground-isolated RS422/RS485 (DB9 male)
- Port Count: 2 total
- Baud Rate: Up to 230,400 bps
- Isolation: Ground-isolated RS485 interface
- Console Port: Shared with Serial Port 1

Power Requirements:
- Input Voltage: 5 V DC
- Current Consumption: 1200 mA

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

Physical Dimensions:
- Size: 92 mm × 118 mm × 27 mm
- Material: Metal enclosure (Rayon industrial design)

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### 4. Functionality

Operational Concept:
The APort201 functions as an Ethernet-to-serial converter, bridging IP-based networks with serial communication devices. It allows both local and remote hosts to access RS485 devices through a unified interface.

Data Flow Logic:
- Data from the local RS232 port (Serial Port 1) is transmitted exclusively to the RS485 port (Serial Port 2).
- Data from remote virtual COM ports (via IP) is also directed to Serial Port 2.
- Data received from Serial Port 2 is broadcast to Serial Port 1 and both remote virtual COM ports, ensuring synchronized communication among all connected hosts.

Use Cases:
- Industrial automation and control systems
- PLC and HMI integration
- Remote monitoring of RS485-based sensors or controllers
- SCADA systems requiring IP-based access to serial devices
- Redundant host configurations for backup and maintenance

Compatibility:
- Compatible with Windows (NT through 10), Linux, and SCO UNIX systems.
- Supports both TPORT and RPORT virtual COM drivers for flexible connection management.
- Works with standard serial communication protocols such as MODBUS RTU over TCP/IP.

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### 5. Components & Accessories

Included Items:
- APort201 device server unit
- UP110/UP220 5 V DC power adapter
- User manual and software CD (includes drivers and utilities)

Optional Accessories:
- RS232/RS485 communication cables
- DIN-rail mounting kit (optional)
- Replacement power adapter (UP110/UP220)

Connectors:
- RJ45 for Ethernet
- DB9 male connectors for serial ports
- Power jack for 5 V DC input

Pin Assignments (DB9 Male):
- RS232 Mode: Standard DCD, RXD, TXD, DTR, GND, DSR, RTS, CTS, RI
- RS422/485 Mode: TX+/TX–, RX+/RX–, isolated GND
- RS485 Mode: Short pins 2–3 for DATA+, 4–6 for DATA–; optional 10 kΩ or 680 Ω pull-up/pull-down resistors configurable via pin bridging.

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### 6. Installation & Setup

Hardware Installation Steps:
1. Connect the APort201 to a network hub or switch using a standard Ethernet cable.
2. Connect the RS232 or RS485 devices to the corresponding DB9 ports.
3. Configure DIP switch settings:
- Bit 1: Console port enable (ON) or normal RS232 (OFF)
- Bit 2: Firmware upgrade mode (ON) or normal operation (OFF)
4. Apply 5 V DC power using the supplied adapter.
5. Verify LED indicators for power and network link status.

Software Configuration:
- Access via Web browser (default IP: 192.168.1.254, password: 11111)
- Configuration also available via Telnet or console terminal (115200 bps, 8N1).
- Supports static or DHCP-assigned IP addressing.
- Serial port modes configurable as TCP Server, TCP Client, UDP Send/Receive, or Real TTY.

Driver Installation:
- Windows: Install APORT or TPORT virtual COM drivers using provided utilities (`aport_ap.exe`, `tport_ap.exe`, `ainstall.exe`, `tinstall.exe`).
- Linux/UNIX: Install GVMODEM or RTTY drivers for fixed TTY mapping.
- SCO UNIX: Use `rtty100.tar` package for real TTY driver installation.

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

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### 7. Performance & Capabilities

Data Throughput:
- Serial communication up to 230.4 kBd
- Ethernet throughput up to 100 Mbps (auto-negotiated)

Latency Considerations:
- Minimal internal processing delay due to dedicated RISC CPU
- Network latency dependent on TCP/UDP configuration and network conditions
- Adjustable “TCP delay time” parameter in TPORT driver to optimize timing-sensitive applications

Capacity:
- Supports one local and two remote hosts simultaneously
- Two independent UART controllers for dual virtual COM port operation

Efficiency:
- Consolidates multiple device servers into one unit, reducing RS485 network loading
- Ensures consistent RS485 signal characteristics across all hosts

Limitations:
- Designed for small to medium-scale serial networking; not intended for high-density multiport aggregation beyond two RS485 channels
- Latency inherent to TCP/IP communication must be considered in time-critical control applications

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### 8. Standards & Compliance

Network Standards:
- IEEE 802.3 10Base-T / 100Base-TX Ethernet
- TCP/IP, UDP/IP, DHCP, Telnet, HTTP protocols

Serial Communication Standards:
- RS232 (EIA/TIA-232)
- RS422/RS485 (EIA/TIA-422/485) with ground isolation

Software Standards:
- RFC 2217 compliant (Telnet COM port control)
- Compatible with standard COM port APIs in Windows environments

Regulatory Compliance:
- CE and FCC Class A (industrial environment)
- RoHS-compliant manufacturing

Industry Compatibility:
- Supports MODBUS RTU over TCP/IP
- Integrates with SCADA, HMI, and PLC systems adhering to industrial communication standards

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### 9. Additional Information

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

Support & Maintenance:
- Technical support via email and phone
- Firmware updates available from Rayon’s website
- RMA (Return Material Authorization) required for repairs; contact Rayon Service Center for authorization and shipping instructions

Maintenance Recommendations:
- Use only the supplied 5 V DC adapter (UP110/UP220)
- Avoid exposure to extreme temperatures or humidity
- Periodically verify firmware version and update as needed

Software Utilities:
- aport_ap.exe / tport_ap.exe: Configure virtual COM mapping and IP settings
- aport_search.exe / tport_search.exe: Discover APORT devices on the network
- wftp8.exe: Firmware upgrade utility
- Teraterm: Recommended terminal emulator for console access

Related Models in APORT Series:
- APORT200: Ethernet to 2 × RS232 ports
- APORT020: Ethernet to 2 × ground-isolated RS232 ports
- APORT101: Ethernet to 1 × RS232 + 1 × RS422/485 port
- APORT202: Ethernet to 2 × RS232 + 2 × RS422/485 ports
- APORT400 / APORT040: Ethernet to 4 × RS232 or 4 × isolated RS232 ports
- APORT800 / APORT008: Ethernet to 8 × RS232 or 8 × RS422/485 ports

Firmware & Driver Updates:
- Available for download from Rayon’s official website
- Supports both APORT and TPORT driver modes for Windows systems
- UNIX/Linux drivers provided as `gvmodem` and `rtty` packages

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### Summary

The Rayon APort201 IP Device Server is a robust, compact, and versatile Ethernet-to-serial converter engineered for industrial automation and control applications. It bridges IP networks with RS485 and RS232 serial devices, enabling simultaneous local and remote access while maintaining electrical isolation and data integrity. With its 32-bit RISC architecture, multi-platform driver support, and flexible configuration modes, the APort201 provides a reliable and cost-efficient solution for modernizing legacy serial systems and integrating them into IP-based infrastructures.

Its combination of high-speed serial performance, ground isolation, and multi-host capability makes it particularly suitable for distributed control systems, SCADA networks, and redundant host configurations where reliability and synchronization are critical.