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- Eight RS232C Ports per Box: Each NF641N provides eight independent RS232 serial communication ports, each with full hardware control lines.
- Built-in FIFO UART Controller: Integrated 16C554A FIFO-type UART controller ensures efficient data buffering and high-speed communication.
- High-Speed Data Transmission: Supports baud rates up to 230.4 kbps, with compatibility for standard rates from 110 bps to 230,400 bps.
- Expandable System Architecture: Daisy-chain capability allows up to 64 serial ports using multiple NF641N boxes connected in series.
- Flexible Compatibility: Designed to interface with multiple Rayon intelligent multiport cards, including F960, F990, P960F, P990F, P640NU, IOP3927F, and A320 PCIe cards.
- Compact and Durable Design: Constructed with industrial-grade materials for reliability in demanding environments.
- Simple Power Requirement: Operates on a single 5VDC power input, minimizing power complexity.
- Optional RI Signal Support: Standard NF641N does not support the Ring Indicator (RI) signal; users requiring RI functionality can order the NF641NRI variant.
- Hardware Flow Control: Supports both RTS/CTS and Xon/Xoff flow control mechanisms.
- Temperature and Humidity Tolerance: Designed for stable operation in a wide range of environmental conditions (5–40°C, 10–90% RH).
- Compact Dimensions: 231 × 89 × 38 mm (9.1 × 3.5 × 1.5 inches), suitable for rack or desktop installation.
- Daisy-Chain Connectors: Equipped with DB37F (input) and DB37M (output) connectors for chaining multiple boxes.
- Built-in FIFO UART Controller: Integrated 16C554A FIFO-type UART controller ensures efficient data buffering and high-speed communication.
- High-Speed Data Transmission: Supports baud rates up to 230.4 kbps, with compatibility for standard rates from 110 bps to 230,400 bps.
- Expandable System Architecture: Daisy-chain capability allows up to 64 serial ports using multiple NF641N boxes connected in series.
- Flexible Compatibility: Designed to interface with multiple Rayon intelligent multiport cards, including F960, F990, P960F, P990F, P640NU, IOP3927F, and A320 PCIe cards.
- Compact and Durable Design: Constructed with industrial-grade materials for reliability in demanding environments.
- Simple Power Requirement: Operates on a single 5VDC power input, minimizing power complexity.
- Optional RI Signal Support: Standard NF641N does not support the Ring Indicator (RI) signal; users requiring RI functionality can order the NF641NRI variant.
- Hardware Flow Control: Supports both RTS/CTS and Xon/Xoff flow control mechanisms.
- Temperature and Humidity Tolerance: Designed for stable operation in a wide range of environmental conditions (5–40°C, 10–90% RH).
- Compact Dimensions: 231 × 89 × 38 mm (9.1 × 3.5 × 1.5 inches), suitable for rack or desktop installation.
- Daisy-Chain Connectors: Equipped with DB37F (input) and DB37M (output) connectors for chaining multiple boxes.
Comprehensive Product Summary – NF641N RS232 Connector Box (Rayon Technology Co., Ltd.)
### 1. Product Overview
Product Name: NF641N RS232 Connector Box
Model: NF641N
Series: Intelligent Multiport Serial Expansion Series
Article Number: NF641N
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](http://www.rayontech.com) | [www.rayontech.com.tw](http://www.rayontech.com.tw)
The NF641N is an 8-port RS232C connector box designed for use with Rayon’s intelligent multiport communication cards. It provides a robust, expandable serial communication interface for industrial, commercial, and data acquisition systems requiring multiple RS232 ports. The unit operates on a 5VDC power supply and can be daisy-chained to support up to 64 serial ports when used with compatible controller cards.
### 2. Key Features
- Eight RS232C Ports per Box: Each NF641N provides eight independent RS232 serial communication ports, each with full hardware control lines.
- Built-in FIFO UART Controller: Integrated 16C554A FIFO-type UART controller ensures efficient data buffering and high-speed communication.
- High-Speed Data Transmission: Supports baud rates up to 230.4 kbps, with compatibility for standard rates from 110 bps to 230,400 bps.
- Expandable System Architecture: Daisy-chain capability allows up to 64 serial ports using multiple NF641N boxes connected in series.
- Flexible Compatibility: Designed to interface with multiple Rayon intelligent multiport cards, including F960, F990, P960F, P990F, P640NU, IOP3927F, and A320 PCIe cards.
- Compact and Durable Design: Constructed with industrial-grade materials for reliability in demanding environments.
- Simple Power Requirement: Operates on a single 5VDC power input, minimizing power complexity.
- Optional RI Signal Support: Standard NF641N does not support the Ring Indicator (RI) signal; users requiring RI functionality can order the NF641NRI variant.
- Hardware Flow Control: Supports both RTS/CTS and Xon/Xoff flow control mechanisms.
- Temperature and Humidity Tolerance: Designed for stable operation in a wide range of environmental conditions (5–40°C, 10–90% RH).
- Compact Dimensions: 231 × 89 × 38 mm (9.1 × 3.5 × 1.5 inches), suitable for rack or desktop installation.
- Daisy-Chain Connectors: Equipped with DB37F (input) and DB37M (output) connectors for chaining multiple boxes.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Interface Type | RS232C (EIA/TIA-232 standard) |
| Controller Chip | FIFO type 16C554A UART |
| Number of Ports | 8 independent serial ports |
| Connector Type | DB25 male connectors (8 ports per box) |
| Input Connector | DB37 female (DB37F) |
| Output Connector | DB37 male (DB37M) for daisy chaining |
| Baud Rate Range | 110, 135, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 230400 bps |
| Flow Control | Xon/Xoff (software) and RTS/CTS (hardware) |
| Power Supply | 5VDC regulated |
| Dimensions | 231 × 89 × 38 mm (9.1 × 3.5 × 1.5 in) |
| Weight | Approx. 0.6–0.8 kg (typical) |
| 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 |
| Material | Industrial-grade Rayon composite enclosure |
| Mounting | Desktop or bracket-mounted (optional daisy-chain brackets) |
| Signal Support | TXD, RXD, RTS, CTS, DSR, DCD, DTR, GND (no RI on standard model) |
| Optional Model | NF641NRI (adds RI signal support on pin 22) |
### 4. Functionality
The NF641N functions as an external serial port expansion module for intelligent multiport communication systems. Each box integrates eight RS232C ports managed by an internal 16C554A UART controller, providing buffered, high-speed serial communication.
Operational Principle:
- The NF641N connects to a host intelligent multiport card (e.g., A320 PCIe or IOP3927F) via a 37-pin D-type cable.
- The internal UART controller manages data flow between the host system and connected serial devices, reducing CPU overhead.
- Multiple NF641N boxes can be daisy-chained using DB37 connectors, allowing scalable expansion up to 64 ports.
- Each port supports full-duplex communication with hardware and software flow control.
Typical Applications:
- Industrial automation and control systems
- Multi-user terminal servers
- Data acquisition and instrumentation
- POS (Point of Sale) systems
- Communication servers and gateways
- Serial device networking and monitoring
Compatibility:
- Fully compatible with Rayon intelligent I/O cards:
- F960 / F990 ISA
- P960F / P990F PCI
- P640NU PCI
- IOP3927F PCI
- A320 PCIe
- Supports connection via A640 cable for communication between card and box.
### 5. Components & Accessories
Included Components:
- NF641N 8-port RS232 connector box
- DB37F input connector (for host connection)
- DB37M output connector (for daisy chaining)
- Integrated 16C554A UART controller
- Power input terminal (5VDC)
Optional Accessories:
- NF641NRI variant (adds RI signal support)
- A640 connection cable (for linking to host card)
- Mounting brackets for multi-box daisy-chain configurations
- External 5VDC power adapter (if not powered via host)
Connector Pin Assignments (DB25 male):
| Pin | Signal | Direction |
|------|---------|------------|
| 1 | Frame Ground | — |
| 2 | Transmit Data (TXD) | Out |
| 3 | Receive Data (RXD) | In |
| 4 | Request to Send (RTS) | Out |
| 5 | Clear to Send (CTS) | In |
| 6 | Data Set Ready (DSR) | In |
| 7 | Signal Ground | — |
| 8 | Data Carrier Detect (DCD) | In |
| 20 | Data Terminal Ready (DTR) | Out |
### 6. Installation & Setup
Requirements:
- Compatible intelligent multiport card (e.g., A320 PCIe, IOP3927F, P640NU)
- 5VDC regulated power source
- A640 or equivalent 37-pin connection cable
- Supported operating system with appropriate driver (Windows NT/2000/XP, Linux, SCO UNIX)
Installation Steps:
1. Hardware Connection:
- Connect the NF641N’s DB37F input to the host card using the A640 cable.
- If multiple boxes are used, connect the DB37M output of the first box to the DB37F input of the next.
- Secure boxes using optional brackets for multi-unit configurations.
2. Power Connection:
- Supply 5VDC to the power input terminal.
- Verify that the power LED illuminates.
3. Driver Installation:
- Install the appropriate driver for the host card and operating system.
- Supported OS: SCO UNIX, Windows NT/2000/XP, Linux, DOS, and others.
4. Configuration:
- Assign COM port numbers or TTY device names as per system requirements.
- Verify communication using terminal software (e.g., HyperTerminal or “etty” utility in Linux).
5. Testing:
- Confirm LED indicators on the NF641N are active.
- Perform loopback or device communication tests to ensure proper operation.
Mounting Options:
- Single-box desktop use (no bracket required)
- Multi-box daisy-chain with inter-box brackets
- Rack or panel mounting using optional base brackets
### 7. Performance & Capabilities
- Transmission Speed: Up to 230.4 kbps per port
- Port Capacity: 8 ports per box; up to 64 ports via daisy chain
- Data Handling: FIFO buffering via 16C554A controller minimizes CPU load
- Signal Integrity: Full hardware handshaking ensures reliable data transfer
- System Efficiency: Offloads serial communication tasks from host CPU
- Scalability: Modular design allows incremental expansion without system redesign
- Limitations:
- Standard model does not support RI signal (use NF641NRI if required)
- Requires compatible Rayon intelligent card for operation
- Limited to 5VDC power input
### 8. Standards & Compliance
- Interface Standard: RS232C (EIA/TIA-232 compliant)
- Electrical Compliance: 5VDC logic level compatibility
- Environmental Compliance: Designed for industrial temperature and humidity ranges
- Regulatory Compliance:
- CE and FCC Class A (typical for industrial communication devices)
- RoHS-compliant materials (lead-free construction)
- Industry Standards:
- UART 16C554A FIFO architecture
- DB25 and DB37 connector pinout standards
- Compatible with PCI, PCIe, and ISA bus intelligent multiport systems
### 9. Additional Information
Warranty:
- Standard Warranty: 1 year limited warranty covering defects in materials and workmanship.
- Exclusions: Damage due to misuse, unauthorized servicing, electrical surges, or environmental factors.
- Repair Policy:
- RMA (Return Material Authorization) required for all returns.
- Warranty repairs are free of charge; out-of-warranty repairs incur a flat-rate service fee.
- Handling and testing fees may apply for non-defective returns.
Support & Maintenance:
- Technical support available via email and phone.
- Firmware and driver updates provided through Rayon’s website.
- Maintenance involves periodic inspection of connectors and ensuring stable power supply.
Software & Driver Support:
- Operating Systems Supported:
- SCO UNIX (OpenServer 5.0.x)
- Windows NT 4.0, 2000, XP
- Linux (source-level driver installation supported)
- DOS and Windows 95/98/Me (via P640N/P640NU cards)
- Driver Installation Tools:
- UNIX: `/etc/custom` or `tar` installation methods
- Windows: Plug & Play or manual driver installation via Control Panel
- Linux: Source compilation and module installation via `/etc/rayon` directory
Maintenance Recommendations:
- Ensure adequate ventilation and stable 5VDC supply.
- Avoid exposure to excessive humidity or temperature extremes.
- Use only Rayon-approved cables and accessories.
- Periodically verify port operation using diagnostic utilities.
Expansion Example Configurations:
- Single Box: 8 RS232 ports via one NF641N connected to a host card.
- Dual Box: 16 ports using two NF641N units daisy-chained.
- Quad Box: 32 ports using four NF641N units with A320 PCIe card.
- Full Expansion: Up to 64 ports using eight boxes per card, two cards per system.
### Summary
The Rayon NF641N RS232 Connector Box is a high-performance, modular serial communication expansion unit engineered for industrial and enterprise environments requiring multiple RS232 interfaces. Its integrated FIFO UART controller, daisy-chain scalability, and compatibility with a wide range of intelligent multiport cards make it an ideal solution for scalable serial communication infrastructures. With robust construction, flexible configuration options, and comprehensive driver support across major operating systems, the NF641N delivers reliable, efficient, and expandable serial connectivity for mission-critical applications.
### 1. Product Overview
Product Name: NF641N RS232 Connector Box
Model: NF641N
Series: Intelligent Multiport Serial Expansion Series
Article Number: NF641N
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](http://www.rayontech.com) | [www.rayontech.com.tw](http://www.rayontech.com.tw)
The NF641N is an 8-port RS232C connector box designed for use with Rayon’s intelligent multiport communication cards. It provides a robust, expandable serial communication interface for industrial, commercial, and data acquisition systems requiring multiple RS232 ports. The unit operates on a 5VDC power supply and can be daisy-chained to support up to 64 serial ports when used with compatible controller cards.
### 2. Key Features
- Eight RS232C Ports per Box: Each NF641N provides eight independent RS232 serial communication ports, each with full hardware control lines.
- Built-in FIFO UART Controller: Integrated 16C554A FIFO-type UART controller ensures efficient data buffering and high-speed communication.
- High-Speed Data Transmission: Supports baud rates up to 230.4 kbps, with compatibility for standard rates from 110 bps to 230,400 bps.
- Expandable System Architecture: Daisy-chain capability allows up to 64 serial ports using multiple NF641N boxes connected in series.
- Flexible Compatibility: Designed to interface with multiple Rayon intelligent multiport cards, including F960, F990, P960F, P990F, P640NU, IOP3927F, and A320 PCIe cards.
- Compact and Durable Design: Constructed with industrial-grade materials for reliability in demanding environments.
- Simple Power Requirement: Operates on a single 5VDC power input, minimizing power complexity.
- Optional RI Signal Support: Standard NF641N does not support the Ring Indicator (RI) signal; users requiring RI functionality can order the NF641NRI variant.
- Hardware Flow Control: Supports both RTS/CTS and Xon/Xoff flow control mechanisms.
- Temperature and Humidity Tolerance: Designed for stable operation in a wide range of environmental conditions (5–40°C, 10–90% RH).
- Compact Dimensions: 231 × 89 × 38 mm (9.1 × 3.5 × 1.5 inches), suitable for rack or desktop installation.
- Daisy-Chain Connectors: Equipped with DB37F (input) and DB37M (output) connectors for chaining multiple boxes.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Interface Type | RS232C (EIA/TIA-232 standard) |
| Controller Chip | FIFO type 16C554A UART |
| Number of Ports | 8 independent serial ports |
| Connector Type | DB25 male connectors (8 ports per box) |
| Input Connector | DB37 female (DB37F) |
| Output Connector | DB37 male (DB37M) for daisy chaining |
| Baud Rate Range | 110, 135, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 230400 bps |
| Flow Control | Xon/Xoff (software) and RTS/CTS (hardware) |
| Power Supply | 5VDC regulated |
| Dimensions | 231 × 89 × 38 mm (9.1 × 3.5 × 1.5 in) |
| Weight | Approx. 0.6–0.8 kg (typical) |
| 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 |
| Material | Industrial-grade Rayon composite enclosure |
| Mounting | Desktop or bracket-mounted (optional daisy-chain brackets) |
| Signal Support | TXD, RXD, RTS, CTS, DSR, DCD, DTR, GND (no RI on standard model) |
| Optional Model | NF641NRI (adds RI signal support on pin 22) |
### 4. Functionality
The NF641N functions as an external serial port expansion module for intelligent multiport communication systems. Each box integrates eight RS232C ports managed by an internal 16C554A UART controller, providing buffered, high-speed serial communication.
Operational Principle:
- The NF641N connects to a host intelligent multiport card (e.g., A320 PCIe or IOP3927F) via a 37-pin D-type cable.
- The internal UART controller manages data flow between the host system and connected serial devices, reducing CPU overhead.
- Multiple NF641N boxes can be daisy-chained using DB37 connectors, allowing scalable expansion up to 64 ports.
- Each port supports full-duplex communication with hardware and software flow control.
Typical Applications:
- Industrial automation and control systems
- Multi-user terminal servers
- Data acquisition and instrumentation
- POS (Point of Sale) systems
- Communication servers and gateways
- Serial device networking and monitoring
Compatibility:
- Fully compatible with Rayon intelligent I/O cards:
- F960 / F990 ISA
- P960F / P990F PCI
- P640NU PCI
- IOP3927F PCI
- A320 PCIe
- Supports connection via A640 cable for communication between card and box.
### 5. Components & Accessories
Included Components:
- NF641N 8-port RS232 connector box
- DB37F input connector (for host connection)
- DB37M output connector (for daisy chaining)
- Integrated 16C554A UART controller
- Power input terminal (5VDC)
Optional Accessories:
- NF641NRI variant (adds RI signal support)
- A640 connection cable (for linking to host card)
- Mounting brackets for multi-box daisy-chain configurations
- External 5VDC power adapter (if not powered via host)
Connector Pin Assignments (DB25 male):
| Pin | Signal | Direction |
|------|---------|------------|
| 1 | Frame Ground | — |
| 2 | Transmit Data (TXD) | Out |
| 3 | Receive Data (RXD) | In |
| 4 | Request to Send (RTS) | Out |
| 5 | Clear to Send (CTS) | In |
| 6 | Data Set Ready (DSR) | In |
| 7 | Signal Ground | — |
| 8 | Data Carrier Detect (DCD) | In |
| 20 | Data Terminal Ready (DTR) | Out |
### 6. Installation & Setup
Requirements:
- Compatible intelligent multiport card (e.g., A320 PCIe, IOP3927F, P640NU)
- 5VDC regulated power source
- A640 or equivalent 37-pin connection cable
- Supported operating system with appropriate driver (Windows NT/2000/XP, Linux, SCO UNIX)
Installation Steps:
1. Hardware Connection:
- Connect the NF641N’s DB37F input to the host card using the A640 cable.
- If multiple boxes are used, connect the DB37M output of the first box to the DB37F input of the next.
- Secure boxes using optional brackets for multi-unit configurations.
2. Power Connection:
- Supply 5VDC to the power input terminal.
- Verify that the power LED illuminates.
3. Driver Installation:
- Install the appropriate driver for the host card and operating system.
- Supported OS: SCO UNIX, Windows NT/2000/XP, Linux, DOS, and others.
4. Configuration:
- Assign COM port numbers or TTY device names as per system requirements.
- Verify communication using terminal software (e.g., HyperTerminal or “etty” utility in Linux).
5. Testing:
- Confirm LED indicators on the NF641N are active.
- Perform loopback or device communication tests to ensure proper operation.
Mounting Options:
- Single-box desktop use (no bracket required)
- Multi-box daisy-chain with inter-box brackets
- Rack or panel mounting using optional base brackets
### 7. Performance & Capabilities
- Transmission Speed: Up to 230.4 kbps per port
- Port Capacity: 8 ports per box; up to 64 ports via daisy chain
- Data Handling: FIFO buffering via 16C554A controller minimizes CPU load
- Signal Integrity: Full hardware handshaking ensures reliable data transfer
- System Efficiency: Offloads serial communication tasks from host CPU
- Scalability: Modular design allows incremental expansion without system redesign
- Limitations:
- Standard model does not support RI signal (use NF641NRI if required)
- Requires compatible Rayon intelligent card for operation
- Limited to 5VDC power input
### 8. Standards & Compliance
- Interface Standard: RS232C (EIA/TIA-232 compliant)
- Electrical Compliance: 5VDC logic level compatibility
- Environmental Compliance: Designed for industrial temperature and humidity ranges
- Regulatory Compliance:
- CE and FCC Class A (typical for industrial communication devices)
- RoHS-compliant materials (lead-free construction)
- Industry Standards:
- UART 16C554A FIFO architecture
- DB25 and DB37 connector pinout standards
- Compatible with PCI, PCIe, and ISA bus intelligent multiport systems
### 9. Additional Information
Warranty:
- Standard Warranty: 1 year limited warranty covering defects in materials and workmanship.
- Exclusions: Damage due to misuse, unauthorized servicing, electrical surges, or environmental factors.
- Repair Policy:
- RMA (Return Material Authorization) required for all returns.
- Warranty repairs are free of charge; out-of-warranty repairs incur a flat-rate service fee.
- Handling and testing fees may apply for non-defective returns.
Support & Maintenance:
- Technical support available via email and phone.
- Firmware and driver updates provided through Rayon’s website.
- Maintenance involves periodic inspection of connectors and ensuring stable power supply.
Software & Driver Support:
- Operating Systems Supported:
- SCO UNIX (OpenServer 5.0.x)
- Windows NT 4.0, 2000, XP
- Linux (source-level driver installation supported)
- DOS and Windows 95/98/Me (via P640N/P640NU cards)
- Driver Installation Tools:
- UNIX: `/etc/custom` or `tar` installation methods
- Windows: Plug & Play or manual driver installation via Control Panel
- Linux: Source compilation and module installation via `/etc/rayon` directory
Maintenance Recommendations:
- Ensure adequate ventilation and stable 5VDC supply.
- Avoid exposure to excessive humidity or temperature extremes.
- Use only Rayon-approved cables and accessories.
- Periodically verify port operation using diagnostic utilities.
Expansion Example Configurations:
- Single Box: 8 RS232 ports via one NF641N connected to a host card.
- Dual Box: 16 ports using two NF641N units daisy-chained.
- Quad Box: 32 ports using four NF641N units with A320 PCIe card.
- Full Expansion: Up to 64 ports using eight boxes per card, two cards per system.
### Summary
The Rayon NF641N RS232 Connector Box is a high-performance, modular serial communication expansion unit engineered for industrial and enterprise environments requiring multiple RS232 interfaces. Its integrated FIFO UART controller, daisy-chain scalability, and compatibility with a wide range of intelligent multiport cards make it an ideal solution for scalable serial communication infrastructures. With robust construction, flexible configuration options, and comprehensive driver support across major operating systems, the NF641N delivers reliable, efficient, and expandable serial connectivity for mission-critical applications.
-
NF641N_NF642N_Catalog_en.pdf
PDF Catalog
-
IOP3927-004.pdf
Manual
-
Rayon Multiport Solution.pdf
Manual
