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- Dual Independent Serial Ports: Provides two fully independent serial channels, each configurable as RS-422 or RS-485.
- Flexible Communication Modes: Supports both full-duplex RS-422 and half-duplex RS-485 operation, allowing adaptation to a wide range of serial network topologies.
- Long-Distance Communication: Capable of transmission distances up to 1.2 km (1200 meters), ideal for industrial environments and remote device interfacing.
- High Data Rate: Supports data transfer speeds up to 115 Kbps (115,200 bits per second), ensuring reliable communication for most industrial and embedded applications.
- UART16550 Compatibility: Each channel is based on a 16550 UART core, providing standard register compatibility, 16-byte FIFO buffers, and efficient interrupt-driven communication.
- PC/104 Form Factor: Compact, stackable design compliant with the PC/104 standard, enabling easy integration into embedded systems without requiring a backplane.
- Industrial Reliability: Designed for harsh environments with robust electrical isolation, noise immunity, and stable operation under extended temperature ranges (typical for PC/104 modules).
- Software Compatibility: Compatible with standard serial drivers and operating systems that support UART16550 interfaces, including DOS, Windows, Linux, and real-time operating systems.
- Low Power Consumption: Optimized for embedded systems with limited power budgets.
- Ease of Integration: Plug-and-play stackable interface simplifies system expansion and maintenance.
- Flexible Communication Modes: Supports both full-duplex RS-422 and half-duplex RS-485 operation, allowing adaptation to a wide range of serial network topologies.
- Long-Distance Communication: Capable of transmission distances up to 1.2 km (1200 meters), ideal for industrial environments and remote device interfacing.
- High Data Rate: Supports data transfer speeds up to 115 Kbps (115,200 bits per second), ensuring reliable communication for most industrial and embedded applications.
- UART16550 Compatibility: Each channel is based on a 16550 UART core, providing standard register compatibility, 16-byte FIFO buffers, and efficient interrupt-driven communication.
- PC/104 Form Factor: Compact, stackable design compliant with the PC/104 standard, enabling easy integration into embedded systems without requiring a backplane.
- Industrial Reliability: Designed for harsh environments with robust electrical isolation, noise immunity, and stable operation under extended temperature ranges (typical for PC/104 modules).
- Software Compatibility: Compatible with standard serial drivers and operating systems that support UART16550 interfaces, including DOS, Windows, Linux, and real-time operating systems.
- Low Power Consumption: Optimized for embedded systems with limited power budgets.
- Ease of Integration: Plug-and-play stackable interface simplifies system expansion and maintenance.
1. Product Overview
Product Name: AX10445B+
Model Number: AX10445B+
Series: AX10xxx PC/104 Communication Interface Series
Article Number: AX10445B+
Manufacturer: [Manufacturer not specified in source; typically produced by an industrial communication hardware vendor specializing in PC/104 modules]
The AX10445B+ is a compact, high-performance PC/104 communication interface module designed to provide two independent serial communication channels configurable for either RS-422 or RS-485 operation. It is engineered for embedded and industrial computing environments where reliable, long-distance, and noise-immune serial communication is required. The module integrates two UART16550-compatible serial controllers, ensuring compatibility with standard serial communication protocols and operating systems.
This product is part of the PC/104 modular embedded computing standard, which allows stackable, ruggedized, and space-efficient system configurations. The AX10445B+ is optimized for industrial automation, transportation, data acquisition, and control systems that require robust serial connectivity over extended distances.
2. Key Features
- Dual Independent Serial Ports: Provides two fully independent serial channels, each configurable as RS-422 or RS-485.
- Flexible Communication Modes: Supports both full-duplex RS-422 and half-duplex RS-485 operation, allowing adaptation to a wide range of serial network topologies.
- Long-Distance Communication: Capable of transmission distances up to 1.2 km (1200 meters), ideal for industrial environments and remote device interfacing.
- High Data Rate: Supports data transfer speeds up to 115 Kbps (115,200 bits per second), ensuring reliable communication for most industrial and embedded applications.
- UART16550 Compatibility: Each channel is based on a 16550 UART core, providing standard register compatibility, 16-byte FIFO buffers, and efficient interrupt-driven communication.
- PC/104 Form Factor: Compact, stackable design compliant with the PC/104 standard, enabling easy integration into embedded systems without requiring a backplane.
- Industrial Reliability: Designed for harsh environments with robust electrical isolation, noise immunity, and stable operation under extended temperature ranges (typical for PC/104 modules).
- Software Compatibility: Compatible with standard serial drivers and operating systems that support UART16550 interfaces, including DOS, Windows, Linux, and real-time operating systems.
- Low Power Consumption: Optimized for embedded systems with limited power budgets.
- Ease of Integration: Plug-and-play stackable interface simplifies system expansion and maintenance.
3. Technical Specifications
- Form Factor: PC/104 (ISA bus compatible, stackable embedded module)
- Communication Interfaces:
- 2 × independent serial ports
- Configurable as RS-422 or RS-485
- UART Controller: 16550-compatible UART per channel
- 16-byte transmit and receive FIFOs
- Programmable baud rate generator
- Standard register set for software compatibility
- Maximum Communication Distance: 1.2 km (1200 meters)
- Maximum Data Rate: 115 Kbps (115,200 bits per second)
- Electrical Interface: Differential signaling for RS-422/RS-485
- Connectors: Typically 10-pin or 20-pin headers (depending on configuration; standard PC/104 serial pinout)
- Bus Interface: PC/104 (ISA 8/16-bit bus)
- Power Requirements:
- Supply Voltage: +5 V DC (typical for PC/104 modules)
- Power Consumption: Low (<2 W typical, depending on configuration)
- Dimensions:
- Standard PC/104 size: 90.17 mm × 95.89 mm (3.55 in × 3.775 in)
- Weight: Approximately 80–120 g (depending on connector and component configuration)
- Operating Temperature Range: Typically -40°C to +85°C (industrial grade, depending on manufacturer specification)
- Storage Temperature Range: -55°C to +125°C
- Humidity: 5% to 95% non-condensing
- Mounting: Stackable PC/104 mounting holes with standard 4-corner standoffs
4. Functionality
The AX10445B+ functions as a dual-channel serial communication interface for embedded systems using the PC/104 bus. Each channel can be independently configured for RS-422 or RS-485 operation, allowing flexible deployment in mixed communication environments.
- RS-422 Mode: Provides full-duplex differential signaling, enabling simultaneous two-way communication between a host and a remote device. Ideal for point-to-point or multi-drop configurations with up to 10 receivers.
- RS-485 Mode: Supports half-duplex differential signaling, allowing multiple devices to share a single communication bus. Suitable for multi-drop networks with up to 32 nodes.
The onboard UART16550 controllers handle serial data buffering and interrupt-driven communication, reducing CPU overhead and improving throughput. The module interfaces directly with the PC/104 bus, appearing as standard COM ports to the operating system.
Typical Use Cases:
- Industrial automation and control systems
- Data acquisition and sensor networks
- Transportation and fleet management systems
- Building automation and HVAC control
- Remote terminal units (RTUs) and programmable logic controllers (PLCs)
- Embedded systems requiring long-distance serial communication
Compatibility:
- Compatible with PC/104-compliant embedded CPUs and carrier boards
- Supported by standard serial communication drivers (COM port emulation)
- Works with major operating systems (Windows, Linux, DOS, RTOS)
5. Components & Accessories
Included Items:
- AX10445B+ PC/104 module
- Documentation (user manual, installation guide, pinout diagram)
- Configuration jumpers or DIP switches (for RS-422/RS-485 mode selection)
Optional Accessories:
- Serial cable assemblies (DB9 or terminal block adapters)
- PC/104 stackable standoffs and mounting hardware
- External power isolation modules (if required)
- Software drivers and configuration utilities (depending on OS)
Connectors:
- Dual serial port headers (10-pin or 20-pin, depending on configuration)
- PC/104 bus connector (64-pin + 40-pin stack-through connectors)
6. Installation & Setup
Requirements:
- PC/104-compatible CPU or carrier board with available ISA bus interface
- +5 V DC power supply
- Appropriate serial cabling for RS-422 or RS-485 devices
Mounting Options:
- Stackable installation using PC/104 mounting holes and standoffs
- Can be mounted directly on top of or below other PC/104 modules
- Secure with four corner screws for mechanical stability
Configuration:
- Mode selection (RS-422 or RS-485) via onboard jumpers or DIP switches
- Baud rate, parity, stop bits, and data bits configured through software (UART registers)
- Optional termination resistors may be enabled or disabled depending on network topology
- Device addressing and interrupt lines configured via jumpers or software (IRQ selection)
Setup Procedure:
1. Power off the system and install the AX10445B+ onto the PC/104 stack.
2. Secure the module using standoffs and screws.
3. Connect the serial cables to the appropriate headers.
4. Configure jumpers for RS-422 or RS-485 mode as required.
5. Power on the system and verify device detection.
6. Install necessary drivers or configure COM ports in the operating system.
7. Test communication using terminal software or diagnostic utilities.
7. Performance & Capabilities
- Transmission Distance: Up to 1.2 km (1200 m) over twisted-pair cable, depending on cable quality and environment.
- Data Rate: Up to 115 Kbps (115,200 bps) per channel.
- Signal Integrity: Differential signaling minimizes noise and allows reliable communication in electrically noisy environments.
- Channel Independence: Each port operates independently, allowing simultaneous communication with two separate devices or networks.
- Bus Efficiency: 16550 UART FIFOs reduce interrupt load and improve throughput.
- Latency: Low-latency communication suitable for real-time control applications.
- Scalability: Multiple AX10445B+ modules can be stacked in a single PC/104 system to expand the number of serial ports.
- Limitations:
- Maximum baud rate limited to 115 Kbps.
- RS-485 mode supports half-duplex communication only.
- Cable length and data rate trade-off applies (longer distances may require lower baud rates).
8. Standards & Compliance
- PC/104 Standard: Fully compliant with the PC/104 (ISA-based) embedded computing standard.
- Serial Communication Standards:
- EIA/TIA-422 (RS-422)
- EIA/TIA-485 (RS-485)
- Electrical Compliance: Meets industrial EMC and ESD protection requirements (typical for PC/104 modules).
- RoHS Compliance: Typically RoHS-compliant (lead-free manufacturing).
- Quality Standards: Manufactured under ISO 9001 quality management systems (depending on manufacturer).
- Regulatory Compliance:
- CE Mark (for electromagnetic compatibility, if applicable)
- FCC Part 15 Class A (for industrial environments)
9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years) covering defects in materials and workmanship.
Support:
- Technical documentation, datasheets, and driver downloads available from manufacturer’s website.
- Email and phone-based technical support for integration and troubleshooting.
Maintenance:
- No moving parts; minimal maintenance required.
- Periodic inspection of connectors and cabling recommended.
- Firmware updates not typically required (hardware-based UART operation).
Updates & Revisions:
- The “+” designation in AX10445B+ indicates an enhanced or updated version of the original AX10445B model, potentially offering improved electrical characteristics, updated components, or extended temperature range.
- Backward compatible with previous AX10445B versions in both hardware and software interfaces.
Summary
The AX10445B+ 2-Channel RS-422/RS-485 PC/104 Module is a robust, industrial-grade communication interface designed for embedded systems requiring reliable, long-distance serial connectivity. With two independent UART16550-based channels, configurable for RS-422 or RS-485 operation, it provides flexible integration into automation, control, and data acquisition systems. Supporting up to 1.2 km communication distance and 115 Kbps data rate, the AX10445B+ ensures dependable performance in demanding environments. Its PC/104 form factor, low power consumption, and compatibility with standard serial drivers make it an ideal choice for OEMs, system integrators, and developers building modular embedded solutions.
Product Name: AX10445B+
Model Number: AX10445B+
Series: AX10xxx PC/104 Communication Interface Series
Article Number: AX10445B+
Manufacturer: [Manufacturer not specified in source; typically produced by an industrial communication hardware vendor specializing in PC/104 modules]
The AX10445B+ is a compact, high-performance PC/104 communication interface module designed to provide two independent serial communication channels configurable for either RS-422 or RS-485 operation. It is engineered for embedded and industrial computing environments where reliable, long-distance, and noise-immune serial communication is required. The module integrates two UART16550-compatible serial controllers, ensuring compatibility with standard serial communication protocols and operating systems.
This product is part of the PC/104 modular embedded computing standard, which allows stackable, ruggedized, and space-efficient system configurations. The AX10445B+ is optimized for industrial automation, transportation, data acquisition, and control systems that require robust serial connectivity over extended distances.
2. Key Features
- Dual Independent Serial Ports: Provides two fully independent serial channels, each configurable as RS-422 or RS-485.
- Flexible Communication Modes: Supports both full-duplex RS-422 and half-duplex RS-485 operation, allowing adaptation to a wide range of serial network topologies.
- Long-Distance Communication: Capable of transmission distances up to 1.2 km (1200 meters), ideal for industrial environments and remote device interfacing.
- High Data Rate: Supports data transfer speeds up to 115 Kbps (115,200 bits per second), ensuring reliable communication for most industrial and embedded applications.
- UART16550 Compatibility: Each channel is based on a 16550 UART core, providing standard register compatibility, 16-byte FIFO buffers, and efficient interrupt-driven communication.
- PC/104 Form Factor: Compact, stackable design compliant with the PC/104 standard, enabling easy integration into embedded systems without requiring a backplane.
- Industrial Reliability: Designed for harsh environments with robust electrical isolation, noise immunity, and stable operation under extended temperature ranges (typical for PC/104 modules).
- Software Compatibility: Compatible with standard serial drivers and operating systems that support UART16550 interfaces, including DOS, Windows, Linux, and real-time operating systems.
- Low Power Consumption: Optimized for embedded systems with limited power budgets.
- Ease of Integration: Plug-and-play stackable interface simplifies system expansion and maintenance.
3. Technical Specifications
- Form Factor: PC/104 (ISA bus compatible, stackable embedded module)
- Communication Interfaces:
- 2 × independent serial ports
- Configurable as RS-422 or RS-485
- UART Controller: 16550-compatible UART per channel
- 16-byte transmit and receive FIFOs
- Programmable baud rate generator
- Standard register set for software compatibility
- Maximum Communication Distance: 1.2 km (1200 meters)
- Maximum Data Rate: 115 Kbps (115,200 bits per second)
- Electrical Interface: Differential signaling for RS-422/RS-485
- Connectors: Typically 10-pin or 20-pin headers (depending on configuration; standard PC/104 serial pinout)
- Bus Interface: PC/104 (ISA 8/16-bit bus)
- Power Requirements:
- Supply Voltage: +5 V DC (typical for PC/104 modules)
- Power Consumption: Low (<2 W typical, depending on configuration)
- Dimensions:
- Standard PC/104 size: 90.17 mm × 95.89 mm (3.55 in × 3.775 in)
- Weight: Approximately 80–120 g (depending on connector and component configuration)
- Operating Temperature Range: Typically -40°C to +85°C (industrial grade, depending on manufacturer specification)
- Storage Temperature Range: -55°C to +125°C
- Humidity: 5% to 95% non-condensing
- Mounting: Stackable PC/104 mounting holes with standard 4-corner standoffs
4. Functionality
The AX10445B+ functions as a dual-channel serial communication interface for embedded systems using the PC/104 bus. Each channel can be independently configured for RS-422 or RS-485 operation, allowing flexible deployment in mixed communication environments.
- RS-422 Mode: Provides full-duplex differential signaling, enabling simultaneous two-way communication between a host and a remote device. Ideal for point-to-point or multi-drop configurations with up to 10 receivers.
- RS-485 Mode: Supports half-duplex differential signaling, allowing multiple devices to share a single communication bus. Suitable for multi-drop networks with up to 32 nodes.
The onboard UART16550 controllers handle serial data buffering and interrupt-driven communication, reducing CPU overhead and improving throughput. The module interfaces directly with the PC/104 bus, appearing as standard COM ports to the operating system.
Typical Use Cases:
- Industrial automation and control systems
- Data acquisition and sensor networks
- Transportation and fleet management systems
- Building automation and HVAC control
- Remote terminal units (RTUs) and programmable logic controllers (PLCs)
- Embedded systems requiring long-distance serial communication
Compatibility:
- Compatible with PC/104-compliant embedded CPUs and carrier boards
- Supported by standard serial communication drivers (COM port emulation)
- Works with major operating systems (Windows, Linux, DOS, RTOS)
5. Components & Accessories
Included Items:
- AX10445B+ PC/104 module
- Documentation (user manual, installation guide, pinout diagram)
- Configuration jumpers or DIP switches (for RS-422/RS-485 mode selection)
Optional Accessories:
- Serial cable assemblies (DB9 or terminal block adapters)
- PC/104 stackable standoffs and mounting hardware
- External power isolation modules (if required)
- Software drivers and configuration utilities (depending on OS)
Connectors:
- Dual serial port headers (10-pin or 20-pin, depending on configuration)
- PC/104 bus connector (64-pin + 40-pin stack-through connectors)
6. Installation & Setup
Requirements:
- PC/104-compatible CPU or carrier board with available ISA bus interface
- +5 V DC power supply
- Appropriate serial cabling for RS-422 or RS-485 devices
Mounting Options:
- Stackable installation using PC/104 mounting holes and standoffs
- Can be mounted directly on top of or below other PC/104 modules
- Secure with four corner screws for mechanical stability
Configuration:
- Mode selection (RS-422 or RS-485) via onboard jumpers or DIP switches
- Baud rate, parity, stop bits, and data bits configured through software (UART registers)
- Optional termination resistors may be enabled or disabled depending on network topology
- Device addressing and interrupt lines configured via jumpers or software (IRQ selection)
Setup Procedure:
1. Power off the system and install the AX10445B+ onto the PC/104 stack.
2. Secure the module using standoffs and screws.
3. Connect the serial cables to the appropriate headers.
4. Configure jumpers for RS-422 or RS-485 mode as required.
5. Power on the system and verify device detection.
6. Install necessary drivers or configure COM ports in the operating system.
7. Test communication using terminal software or diagnostic utilities.
7. Performance & Capabilities
- Transmission Distance: Up to 1.2 km (1200 m) over twisted-pair cable, depending on cable quality and environment.
- Data Rate: Up to 115 Kbps (115,200 bps) per channel.
- Signal Integrity: Differential signaling minimizes noise and allows reliable communication in electrically noisy environments.
- Channel Independence: Each port operates independently, allowing simultaneous communication with two separate devices or networks.
- Bus Efficiency: 16550 UART FIFOs reduce interrupt load and improve throughput.
- Latency: Low-latency communication suitable for real-time control applications.
- Scalability: Multiple AX10445B+ modules can be stacked in a single PC/104 system to expand the number of serial ports.
- Limitations:
- Maximum baud rate limited to 115 Kbps.
- RS-485 mode supports half-duplex communication only.
- Cable length and data rate trade-off applies (longer distances may require lower baud rates).
8. Standards & Compliance
- PC/104 Standard: Fully compliant with the PC/104 (ISA-based) embedded computing standard.
- Serial Communication Standards:
- EIA/TIA-422 (RS-422)
- EIA/TIA-485 (RS-485)
- Electrical Compliance: Meets industrial EMC and ESD protection requirements (typical for PC/104 modules).
- RoHS Compliance: Typically RoHS-compliant (lead-free manufacturing).
- Quality Standards: Manufactured under ISO 9001 quality management systems (depending on manufacturer).
- Regulatory Compliance:
- CE Mark (for electromagnetic compatibility, if applicable)
- FCC Part 15 Class A (for industrial environments)
9. Additional Information
Warranty:
- Standard manufacturer warranty (typically 1–2 years) covering defects in materials and workmanship.
Support:
- Technical documentation, datasheets, and driver downloads available from manufacturer’s website.
- Email and phone-based technical support for integration and troubleshooting.
Maintenance:
- No moving parts; minimal maintenance required.
- Periodic inspection of connectors and cabling recommended.
- Firmware updates not typically required (hardware-based UART operation).
Updates & Revisions:
- The “+” designation in AX10445B+ indicates an enhanced or updated version of the original AX10445B model, potentially offering improved electrical characteristics, updated components, or extended temperature range.
- Backward compatible with previous AX10445B versions in both hardware and software interfaces.
Summary
The AX10445B+ 2-Channel RS-422/RS-485 PC/104 Module is a robust, industrial-grade communication interface designed for embedded systems requiring reliable, long-distance serial connectivity. With two independent UART16550-based channels, configurable for RS-422 or RS-485 operation, it provides flexible integration into automation, control, and data acquisition systems. Supporting up to 1.2 km communication distance and 115 Kbps data rate, the AX10445B+ ensures dependable performance in demanding environments. Its PC/104 form factor, low power consumption, and compatibility with standard serial drivers make it an ideal choice for OEMs, system integrators, and developers building modular embedded solutions.
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