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- 16-Port RS232 Connectivity: Provides sixteen independent RS232 serial ports for connecting multiple serial devices such as PLCs, sensors, barcode scanners, or industrial controllers to an Ethernet network.
- Ethernet Interface: Supports 10/100 Mbps Ethernet connectivity via RJ45 connector, allowing flexible integration into modern IP-based infrastructures.
- High-Performance CPU: Equipped with an Intel i960CA RISC processor and 2 MB RAM for stable, high-speed data processing.
- Compact Rackmount Design: Dimensions of 440 × 190 × 44 mm (1U height) suitable for standard 19-inch rack installations.
- Multiple Operation Modes: Supports Host Based/Driver Mode, Pair Connection Mode, TCP Server, TCP Client, UDP Server/Client, and Ethernet Modem Mode (for Express models).
- Flexible Configuration: Offers configuration via NPort Management Suite, Telnet console, or ARP command.
- Cross-Platform Driver Support: Compatible with Windows (95/98/ME/NT/2000/XP) Real COM drivers and Linux Real TTY drivers.
- High-Speed Serial Communication: Supports baud rates up to 230.4 Kbps per port.
- Access Control and Security: Provides IP-based access control by server or port, ensuring secure host-device communication.
- Firmware Upgradability: Supports remote firmware upgrades through the NPort Management Suite.
- Data Packing and Delimiter Functions: Optimizes data transmission efficiency by grouping serial data into Ethernet frames based on delimiters or time intervals.
- Scalable Port Expansion: Supports up to 128 ports per Windows 9x/ME host and up to 256 ports per Windows NT/2000/XP host.
- Easy Management: Includes utilities for configuration export/import, batch configuration, and monitoring.
- Ethernet Interface: Supports 10/100 Mbps Ethernet connectivity via RJ45 connector, allowing flexible integration into modern IP-based infrastructures.
- High-Performance CPU: Equipped with an Intel i960CA RISC processor and 2 MB RAM for stable, high-speed data processing.
- Compact Rackmount Design: Dimensions of 440 × 190 × 44 mm (1U height) suitable for standard 19-inch rack installations.
- Multiple Operation Modes: Supports Host Based/Driver Mode, Pair Connection Mode, TCP Server, TCP Client, UDP Server/Client, and Ethernet Modem Mode (for Express models).
- Flexible Configuration: Offers configuration via NPort Management Suite, Telnet console, or ARP command.
- Cross-Platform Driver Support: Compatible with Windows (95/98/ME/NT/2000/XP) Real COM drivers and Linux Real TTY drivers.
- High-Speed Serial Communication: Supports baud rates up to 230.4 Kbps per port.
- Access Control and Security: Provides IP-based access control by server or port, ensuring secure host-device communication.
- Firmware Upgradability: Supports remote firmware upgrades through the NPort Management Suite.
- Data Packing and Delimiter Functions: Optimizes data transmission efficiency by grouping serial data into Ethernet frames based on delimiters or time intervals.
- Scalable Port Expansion: Supports up to 128 ports per Windows 9x/ME host and up to 256 ports per Windows NT/2000/XP host.
- Easy Management: Includes utilities for configuration export/import, batch configuration, and monitoring.
1. Product Overview
Product Name: NPort Server Pro DE-303
Model: DE-303
Series: NPort Server Pro Series
Article Number: DE-303
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa NPort Server Pro DE-303 is a 16-port Ethernet-to-RS232 serial device server designed to connect multiple serial devices to a 10/100 Mbps Ethernet network. It belongs to Moxa’s NPort family of industrial networking products, which includes the NPort Express, NPort Server Lite, and NPort Server Pro lines. The DE-303 model is engineered for high-performance serial-to-Ethernet communication, enabling remote management, monitoring, and control of serial devices over LAN or WAN environments. It is powered by an Intel i960CA RISC CPU with 2 MB RAM, ensuring reliable data throughput and efficient multitasking across all 16 serial ports.
2. Key Features
- 16-Port RS232 Connectivity: Provides sixteen independent RS232 serial ports for connecting multiple serial devices such as PLCs, sensors, barcode scanners, or industrial controllers to an Ethernet network.
- Ethernet Interface: Supports 10/100 Mbps Ethernet connectivity via RJ45 connector, allowing flexible integration into modern IP-based infrastructures.
- High-Performance CPU: Equipped with an Intel i960CA RISC processor and 2 MB RAM for stable, high-speed data processing.
- Compact Rackmount Design: Dimensions of 440 × 190 × 44 mm (1U height) suitable for standard 19-inch rack installations.
- Multiple Operation Modes: Supports Host Based/Driver Mode, Pair Connection Mode, TCP Server, TCP Client, UDP Server/Client, and Ethernet Modem Mode (for Express models).
- Flexible Configuration: Offers configuration via NPort Management Suite, Telnet console, or ARP command.
- Cross-Platform Driver Support: Compatible with Windows (95/98/ME/NT/2000/XP) Real COM drivers and Linux Real TTY drivers.
- High-Speed Serial Communication: Supports baud rates up to 230.4 Kbps per port.
- Access Control and Security: Provides IP-based access control by server or port, ensuring secure host-device communication.
- Firmware Upgradability: Supports remote firmware upgrades through the NPort Management Suite.
- Data Packing and Delimiter Functions: Optimizes data transmission efficiency by grouping serial data into Ethernet frames based on delimiters or time intervals.
- Scalable Port Expansion: Supports up to 128 ports per Windows 9x/ME host and up to 256 ports per Windows NT/2000/XP host.
- Easy Management: Includes utilities for configuration export/import, batch configuration, and monitoring.
3. Technical Specifications
- CPU: Intel i960CA RISC processor
- Memory: 2 MB RAM
- Ethernet Interface: 10/100 Mbps, RJ45 connector
- Serial Interface: 16 × RS232 ports (DB9 female connectors)
- Serial Communication Parameters:
- Baud Rate: Up to 230.4 Kbps
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5, 2
- Parity: None, Even, Odd, Mark, Space
- Flow Control: RTS/CTS, XON/XOFF, None
- Dimensions: 440 mm (W) × 190 mm (D) × 44 mm (H)
- Weight: Approx. 2.5 kg (typical for 16-port rackmount device)
- Material: Metal chassis, industrial-grade construction
- Power Supply: External AC adapter or internal power supply (model dependent)
- Operating Temperature: 0–55°C (typical)
- Storage Temperature: -20–85°C
- Humidity: 5–95% RH (non-condensing)
- Default IP Address: 192.168.127.254
- MAC Address: Factory-assigned unique 48-bit identifier
- Mounting: 19-inch rackmount, 1U height
4. Functionality
The DE-303 functions as a network-based serial device server, bridging traditional RS232 serial communications with Ethernet networks. It encapsulates serial data into TCP/IP or UDP packets, enabling remote access to serial devices over LAN, WAN, or the Internet.
Primary Use Cases:
- Industrial automation systems requiring centralized control of multiple serial devices.
- Remote monitoring of sensors, PLCs, or barcode readers.
- Integration of legacy serial equipment into modern Ethernet-based SCADA systems.
- Serial device sharing among multiple hosts in distributed environments.
Operation Modes:
- Host Based / Driver Mode: Creates virtual COM ports on the host PC, allowing legacy serial applications to communicate transparently over Ethernet.
- Pair Connection Mode: Links two NPorts to extend serial communication beyond RS232 distance limits, functioning as a virtual serial cable over Ethernet.
- TCP Server Mode: Waits for incoming TCP connections from clients, suitable for devices that act as servers.
- TCP Client Mode: Actively initiates TCP connections to remote servers upon data reception or startup.
- UDP Server/Client Mode: Enables fast, connectionless data transmission and multicast/broadcast communication.
- Ethernet Modem Mode (Express models): Emulates modem behavior for legacy systems without TCP/IP support.
Compatibility:
- Windows 95/98/ME/NT/2000/XP (Real COM driver)
- Linux (Real TTY driver)
- Compatible with Moxa PComm Lite Serial Control Library for custom application development.
5. Components & Accessories
Included Items:
- NPort Server Pro DE-303 main unit
- Power cable or adapter (depending on model)
- Rackmount brackets and screws
- Quick installation guide and documentation
- Software CD containing NPort Management Suite, drivers, and utilities
Optional Accessories:
- Serial cables (DB9 male-to-female)
- Ethernet cables (Cat5e or higher)
- External power adapters (if not integrated)
- Console cable for serial configuration
Connectors:
- Ethernet: RJ45 (10/100 Mbps auto-sensing)
- Serial: 16 × DB9 female connectors (RS232)
- Console (for configuration): RS232 (DB9)
6. Installation & Setup
Requirements:
- Standard Ethernet network (10/100 Mbps)
- Available IP address (static or DHCP-assigned)
- Windows or Linux host for configuration and driver installation
Mounting Options:
- Rackmount installation (1U height)
- Desktop placement (rubber feet optional)
Configuration Methods:
1. NPort Management Suite (recommended):
- Install via Dssetup.exe on Windows.
- Use Configurator to locate, configure, and manage NPorts.
- Supports broadcast search, IP assignment, firmware upgrade, and configuration import/export.
2. Telnet Console:
- Access via Telnet to the device’s IP address (default 192.168.127.254).
- Configure network and serial parameters through VT100 interface.
3. ARP Command:
- Assign IP address using ARP and Telnet commands from a local host.
4. Serial Console (for Express models):
- Configure via RS232 console port using terminal emulator (19200, 8N1).
Initial Setup Steps:
- Connect Ethernet and power.
- Assign IP address (static or DHCP).
- Configure serial parameters and operation mode.
- Install Real COM or TTY driver on host.
- Map COM ports using Real COM Installer.
7. Performance & Capabilities
- Serial Speed: Up to 230.4 Kbps per port
- Ethernet Throughput: 10/100 Mbps auto-negotiation
- Port Capacity: 16 independent RS232 ports
- Host Expansion: Up to 128 ports per Windows 9x/ME host, 256 ports per Windows NT/2000/XP host
- Data Packing: Configurable by delimiter or time interval (1–65535 ms)
- TCP/UDP Connections: Supports multiple simultaneous sessions depending on mode
- Latency: Optimized for low-latency serial-to-Ethernet conversion
- Reliability: Built-in watchdog and retry mechanisms for DHCP/BootP
- Limitations: RS232-only (no RS422/485 support on DE-303); DCD signal not transmitted in Pair Connection Mode
8. Standards & Compliance
- Network Protocols: TCP, UDP, IP, ICMP, ARP, DHCP, BOOTP, Telnet
- Serial Standards: RS232 (EIA/TIA-232)
- Ethernet Standards: IEEE 802.3, 10Base-T/100Base-TX
- Software Compatibility: Windows and Linux operating systems
- Regulatory Compliance:
- CE (EMC Directive)
- FCC Part 15 Class A
- RoHS compliant (depending on production year)
- Industry Standards:
- Supports standard COM port emulation (Windows Real COM, Linux Real TTY)
- Compatible with Moxa PComm Lite API for serial control
9. Additional Information
Warranty:
Typically covered by Moxa’s standard 3-year limited hardware warranty (verify with distributor).
Technical Support:
- Email: support@moxa.com.tw
- Website: [http://www.moxa.com](http://www.moxa.com)
- Online resources include driver downloads, firmware updates, and manuals.
Maintenance:
- Periodic firmware updates recommended via NPort Management Suite.
- Configuration backups can be exported/imported for easy redeployment.
- Device monitoring available through NPort Monitor utility.
Software Utilities:
- NPort Management Suite: Comprehensive configuration and management toolset.
- Configurator: GUI-based configuration utility for IP setup, firmware upgrade, and parameter management.
- Real COM Installer: Maps virtual COM ports on Windows hosts.
- NPort Monitor: Monitors port activity and connection status.
- NPort Batch Configurator: Command-line tool for mass configuration and IP assignment (Windows/Linux).
Firmware Configuration Options:
- Server Configuration: IP address, netmask, gateway, DHCP/BootP settings.
- Serial Settings: Baud rate, parity, data bits, stop bits, flow control.
- Access Control: IP-based host and port access permissions.
- Operation Modes: Host Based/Driver, Pair Connection, TCP/UDP, Ethernet Modem.
- Data Packing: Delimiter-based or timed packet grouping.
- TCP Alive Check: Adjustable timeout (1–99 minutes).
Support for Legacy Systems:
- Ethernet Modem Mode allows legacy DOS-based applications to communicate over Ethernet using AT commands (e.g., ATD, ATA, ATH).
- Supports standard modem S-registers for compatibility with traditional serial communication software.
Revision History Highlights:
- Major revision (Nov 2002): Unified software installation under NPort Management Suite; renamed utilities (NPort Manager → Real COM Installer).
- Update (May 2004): Added “Fast Flush” function in Real COM driver for improved performance with PurgeComm() API calls.
Summary
The Moxa NPort Server Pro DE-303 is a robust, industrial-grade 16-port Ethernet-to-RS232 device server designed for high-density serial connectivity in networked environments. With its Intel i960CA RISC CPU, 2 MB RAM, and comprehensive software suite, it provides reliable, high-speed serial-to-Ethernet communication for industrial automation, data acquisition, and remote device management. Its flexible operation modes, cross-platform driver support, and advanced configuration utilities make it an ideal solution for integrating legacy serial equipment into modern IP-based networks while maintaining performance, scalability, and ease of management.
Product Name: NPort Server Pro DE-303
Model: DE-303
Series: NPort Server Pro Series
Article Number: DE-303
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa NPort Server Pro DE-303 is a 16-port Ethernet-to-RS232 serial device server designed to connect multiple serial devices to a 10/100 Mbps Ethernet network. It belongs to Moxa’s NPort family of industrial networking products, which includes the NPort Express, NPort Server Lite, and NPort Server Pro lines. The DE-303 model is engineered for high-performance serial-to-Ethernet communication, enabling remote management, monitoring, and control of serial devices over LAN or WAN environments. It is powered by an Intel i960CA RISC CPU with 2 MB RAM, ensuring reliable data throughput and efficient multitasking across all 16 serial ports.
2. Key Features
- 16-Port RS232 Connectivity: Provides sixteen independent RS232 serial ports for connecting multiple serial devices such as PLCs, sensors, barcode scanners, or industrial controllers to an Ethernet network.
- Ethernet Interface: Supports 10/100 Mbps Ethernet connectivity via RJ45 connector, allowing flexible integration into modern IP-based infrastructures.
- High-Performance CPU: Equipped with an Intel i960CA RISC processor and 2 MB RAM for stable, high-speed data processing.
- Compact Rackmount Design: Dimensions of 440 × 190 × 44 mm (1U height) suitable for standard 19-inch rack installations.
- Multiple Operation Modes: Supports Host Based/Driver Mode, Pair Connection Mode, TCP Server, TCP Client, UDP Server/Client, and Ethernet Modem Mode (for Express models).
- Flexible Configuration: Offers configuration via NPort Management Suite, Telnet console, or ARP command.
- Cross-Platform Driver Support: Compatible with Windows (95/98/ME/NT/2000/XP) Real COM drivers and Linux Real TTY drivers.
- High-Speed Serial Communication: Supports baud rates up to 230.4 Kbps per port.
- Access Control and Security: Provides IP-based access control by server or port, ensuring secure host-device communication.
- Firmware Upgradability: Supports remote firmware upgrades through the NPort Management Suite.
- Data Packing and Delimiter Functions: Optimizes data transmission efficiency by grouping serial data into Ethernet frames based on delimiters or time intervals.
- Scalable Port Expansion: Supports up to 128 ports per Windows 9x/ME host and up to 256 ports per Windows NT/2000/XP host.
- Easy Management: Includes utilities for configuration export/import, batch configuration, and monitoring.
3. Technical Specifications
- CPU: Intel i960CA RISC processor
- Memory: 2 MB RAM
- Ethernet Interface: 10/100 Mbps, RJ45 connector
- Serial Interface: 16 × RS232 ports (DB9 female connectors)
- Serial Communication Parameters:
- Baud Rate: Up to 230.4 Kbps
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5, 2
- Parity: None, Even, Odd, Mark, Space
- Flow Control: RTS/CTS, XON/XOFF, None
- Dimensions: 440 mm (W) × 190 mm (D) × 44 mm (H)
- Weight: Approx. 2.5 kg (typical for 16-port rackmount device)
- Material: Metal chassis, industrial-grade construction
- Power Supply: External AC adapter or internal power supply (model dependent)
- Operating Temperature: 0–55°C (typical)
- Storage Temperature: -20–85°C
- Humidity: 5–95% RH (non-condensing)
- Default IP Address: 192.168.127.254
- MAC Address: Factory-assigned unique 48-bit identifier
- Mounting: 19-inch rackmount, 1U height
4. Functionality
The DE-303 functions as a network-based serial device server, bridging traditional RS232 serial communications with Ethernet networks. It encapsulates serial data into TCP/IP or UDP packets, enabling remote access to serial devices over LAN, WAN, or the Internet.
Primary Use Cases:
- Industrial automation systems requiring centralized control of multiple serial devices.
- Remote monitoring of sensors, PLCs, or barcode readers.
- Integration of legacy serial equipment into modern Ethernet-based SCADA systems.
- Serial device sharing among multiple hosts in distributed environments.
Operation Modes:
- Host Based / Driver Mode: Creates virtual COM ports on the host PC, allowing legacy serial applications to communicate transparently over Ethernet.
- Pair Connection Mode: Links two NPorts to extend serial communication beyond RS232 distance limits, functioning as a virtual serial cable over Ethernet.
- TCP Server Mode: Waits for incoming TCP connections from clients, suitable for devices that act as servers.
- TCP Client Mode: Actively initiates TCP connections to remote servers upon data reception or startup.
- UDP Server/Client Mode: Enables fast, connectionless data transmission and multicast/broadcast communication.
- Ethernet Modem Mode (Express models): Emulates modem behavior for legacy systems without TCP/IP support.
Compatibility:
- Windows 95/98/ME/NT/2000/XP (Real COM driver)
- Linux (Real TTY driver)
- Compatible with Moxa PComm Lite Serial Control Library for custom application development.
5. Components & Accessories
Included Items:
- NPort Server Pro DE-303 main unit
- Power cable or adapter (depending on model)
- Rackmount brackets and screws
- Quick installation guide and documentation
- Software CD containing NPort Management Suite, drivers, and utilities
Optional Accessories:
- Serial cables (DB9 male-to-female)
- Ethernet cables (Cat5e or higher)
- External power adapters (if not integrated)
- Console cable for serial configuration
Connectors:
- Ethernet: RJ45 (10/100 Mbps auto-sensing)
- Serial: 16 × DB9 female connectors (RS232)
- Console (for configuration): RS232 (DB9)
6. Installation & Setup
Requirements:
- Standard Ethernet network (10/100 Mbps)
- Available IP address (static or DHCP-assigned)
- Windows or Linux host for configuration and driver installation
Mounting Options:
- Rackmount installation (1U height)
- Desktop placement (rubber feet optional)
Configuration Methods:
1. NPort Management Suite (recommended):
- Install via Dssetup.exe on Windows.
- Use Configurator to locate, configure, and manage NPorts.
- Supports broadcast search, IP assignment, firmware upgrade, and configuration import/export.
2. Telnet Console:
- Access via Telnet to the device’s IP address (default 192.168.127.254).
- Configure network and serial parameters through VT100 interface.
3. ARP Command:
- Assign IP address using ARP and Telnet commands from a local host.
4. Serial Console (for Express models):
- Configure via RS232 console port using terminal emulator (19200, 8N1).
Initial Setup Steps:
- Connect Ethernet and power.
- Assign IP address (static or DHCP).
- Configure serial parameters and operation mode.
- Install Real COM or TTY driver on host.
- Map COM ports using Real COM Installer.
7. Performance & Capabilities
- Serial Speed: Up to 230.4 Kbps per port
- Ethernet Throughput: 10/100 Mbps auto-negotiation
- Port Capacity: 16 independent RS232 ports
- Host Expansion: Up to 128 ports per Windows 9x/ME host, 256 ports per Windows NT/2000/XP host
- Data Packing: Configurable by delimiter or time interval (1–65535 ms)
- TCP/UDP Connections: Supports multiple simultaneous sessions depending on mode
- Latency: Optimized for low-latency serial-to-Ethernet conversion
- Reliability: Built-in watchdog and retry mechanisms for DHCP/BootP
- Limitations: RS232-only (no RS422/485 support on DE-303); DCD signal not transmitted in Pair Connection Mode
8. Standards & Compliance
- Network Protocols: TCP, UDP, IP, ICMP, ARP, DHCP, BOOTP, Telnet
- Serial Standards: RS232 (EIA/TIA-232)
- Ethernet Standards: IEEE 802.3, 10Base-T/100Base-TX
- Software Compatibility: Windows and Linux operating systems
- Regulatory Compliance:
- CE (EMC Directive)
- FCC Part 15 Class A
- RoHS compliant (depending on production year)
- Industry Standards:
- Supports standard COM port emulation (Windows Real COM, Linux Real TTY)
- Compatible with Moxa PComm Lite API for serial control
9. Additional Information
Warranty:
Typically covered by Moxa’s standard 3-year limited hardware warranty (verify with distributor).
Technical Support:
- Email: support@moxa.com.tw
- Website: [http://www.moxa.com](http://www.moxa.com)
- Online resources include driver downloads, firmware updates, and manuals.
Maintenance:
- Periodic firmware updates recommended via NPort Management Suite.
- Configuration backups can be exported/imported for easy redeployment.
- Device monitoring available through NPort Monitor utility.
Software Utilities:
- NPort Management Suite: Comprehensive configuration and management toolset.
- Configurator: GUI-based configuration utility for IP setup, firmware upgrade, and parameter management.
- Real COM Installer: Maps virtual COM ports on Windows hosts.
- NPort Monitor: Monitors port activity and connection status.
- NPort Batch Configurator: Command-line tool for mass configuration and IP assignment (Windows/Linux).
Firmware Configuration Options:
- Server Configuration: IP address, netmask, gateway, DHCP/BootP settings.
- Serial Settings: Baud rate, parity, data bits, stop bits, flow control.
- Access Control: IP-based host and port access permissions.
- Operation Modes: Host Based/Driver, Pair Connection, TCP/UDP, Ethernet Modem.
- Data Packing: Delimiter-based or timed packet grouping.
- TCP Alive Check: Adjustable timeout (1–99 minutes).
Support for Legacy Systems:
- Ethernet Modem Mode allows legacy DOS-based applications to communicate over Ethernet using AT commands (e.g., ATD, ATA, ATH).
- Supports standard modem S-registers for compatibility with traditional serial communication software.
Revision History Highlights:
- Major revision (Nov 2002): Unified software installation under NPort Management Suite; renamed utilities (NPort Manager → Real COM Installer).
- Update (May 2004): Added “Fast Flush” function in Real COM driver for improved performance with PurgeComm() API calls.
Summary
The Moxa NPort Server Pro DE-303 is a robust, industrial-grade 16-port Ethernet-to-RS232 device server designed for high-density serial connectivity in networked environments. With its Intel i960CA RISC CPU, 2 MB RAM, and comprehensive software suite, it provides reliable, high-speed serial-to-Ethernet communication for industrial automation, data acquisition, and remote device management. Its flexible operation modes, cross-platform driver support, and advanced configuration utilities make it an ideal solution for integrating legacy serial equipment into modern IP-based networks while maintaining performance, scalability, and ease of management.
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NPort_Software_Guide_4.pdf
Manual
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