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- Dual-Port RS-422/485 Interface: Provides two independent asynchronous serial communication ports supporting RS-422 and RS-485 standards.
- Asynchronous Serial Communication: Each port operates asynchronously, allowing flexible data exchange between devices without requiring a shared clock signal.
- High Electrical Isolation: Each communication channel is isolated to withstand voltages greater than 500 VDC, protecting both the host system and connected devices from ground loops, surges, and electrical noise.
- Configurable Interrupts: Supports multiple interrupt request (IRQ) lines — IRQ 2–5, 10–12, and 15 — enabling flexible system integration and conflict-free operation in multi-device environments.
- COM Port Address Range: Configurable for COM1 through COM8, allowing easy assignment and compatibility with legacy and modern systems.
- UART16450 Controller: Each port is equipped with a UART16450 chip, providing reliable serial data buffering and control for stable communication up to 115 kbps.
- Driver Support: Includes software drivers for DOS and Windows operating systems, ensuring compatibility with a wide range of industrial and legacy applications.
- Compact Form Factor: The board measures 175 mm x 107 mm, suitable for integration into compact industrial enclosures or embedded systems.
- Industrial Reliability: Designed for continuous operation in demanding environments, with robust electrical design and high-quality components.
- Asynchronous Serial Communication: Each port operates asynchronously, allowing flexible data exchange between devices without requiring a shared clock signal.
- High Electrical Isolation: Each communication channel is isolated to withstand voltages greater than 500 VDC, protecting both the host system and connected devices from ground loops, surges, and electrical noise.
- Configurable Interrupts: Supports multiple interrupt request (IRQ) lines — IRQ 2–5, 10–12, and 15 — enabling flexible system integration and conflict-free operation in multi-device environments.
- COM Port Address Range: Configurable for COM1 through COM8, allowing easy assignment and compatibility with legacy and modern systems.
- UART16450 Controller: Each port is equipped with a UART16450 chip, providing reliable serial data buffering and control for stable communication up to 115 kbps.
- Driver Support: Includes software drivers for DOS and Windows operating systems, ensuring compatibility with a wide range of industrial and legacy applications.
- Compact Form Factor: The board measures 175 mm x 107 mm, suitable for integration into compact industrial enclosures or embedded systems.
- Industrial Reliability: Designed for continuous operation in demanding environments, with robust electrical design and high-quality components.
1. Product Overview
Product Name: AR-B9012
Model Number: AR-B9012
Series: AR-B Industrial Communication Interface Series
Article Number: AR-B9012
Manufacturer: AR-B (Industrial Computing Solutions Division)
The AR-B9012 is a dual-port asynchronous serial communication interface card designed for industrial and embedded computing environments requiring robust, isolated RS-422/485 connectivity. It provides two independent serial ports supporting asynchronous data transmission with full electrical isolation, ensuring reliable communication in electrically noisy or high-interference environments. The board is engineered for integration into industrial PCs, automation controllers, and embedded systems that demand stable, high-integrity serial communication channels.
2. Key Features
- Dual-Port RS-422/485 Interface: Provides two independent asynchronous serial communication ports supporting RS-422 and RS-485 standards.
- Asynchronous Serial Communication: Each port operates asynchronously, allowing flexible data exchange between devices without requiring a shared clock signal.
- High Electrical Isolation: Each communication channel is isolated to withstand voltages greater than 500 VDC, protecting both the host system and connected devices from ground loops, surges, and electrical noise.
- Configurable Interrupts: Supports multiple interrupt request (IRQ) lines — IRQ 2–5, 10–12, and 15 — enabling flexible system integration and conflict-free operation in multi-device environments.
- COM Port Address Range: Configurable for COM1 through COM8, allowing easy assignment and compatibility with legacy and modern systems.
- UART16450 Controller: Each port is equipped with a UART16450 chip, providing reliable serial data buffering and control for stable communication up to 115 kbps.
- Driver Support: Includes software drivers for DOS and Windows operating systems, ensuring compatibility with a wide range of industrial and legacy applications.
- Compact Form Factor: The board measures 175 mm x 107 mm, suitable for integration into compact industrial enclosures or embedded systems.
- Industrial Reliability: Designed for continuous operation in demanding environments, with robust electrical design and high-quality components.
3. Technical Specifications
- Interface Type: RS-422 / RS-485 (asynchronous serial communication)
- Number of Ports: 2 independent serial ports
- Controller IC: UART16450
- Maximum Data Rate: 115 kbps (asynchronous mode)
- Isolation Voltage: >500 VDC (galvanic isolation between communication channels and system bus)
- Interrupt Lines: Selectable IRQ 2–5, 10–12, 15
- COM Port Assignment: Configurable COM1–COM8
- Board Dimensions: 175 mm (length) × 107 mm (width)
- Weight: Approximately 150–200 g (typical, depending on configuration)
- Power Requirements: Standard PC bus power (exact voltage and current draw dependent on system configuration)
- Operating Temperature Range: Typically 0°C to 60°C (industrial-grade tolerance)
- Storage Temperature Range: -20°C to 85°C
- Relative Humidity: 5%–95% non-condensing
- Material Composition: Multi-layer PCB with industrial-grade components, gold-plated connectors, and reinforced isolation barriers
- Connector Type: Standard DB9 or terminal block connectors (depending on configuration or optional accessory kit)
4. Functionality
The AR-B9012 functions as a dual-port serial communication interface card that enables a host computer or embedded controller to communicate with external devices using RS-422 or RS-485 protocols. Each port operates independently, allowing simultaneous communication with two separate devices or networks.
Operational Principle:
- The onboard UART16450 controller manages data buffering, transmission, and reception for each port.
- The card interfaces with the system bus, mapping each port to a selectable COM address (COM1–COM8).
- Interrupts can be assigned to specific IRQ lines (2–5, 10–12, 15) to optimize system performance and prevent conflicts.
- Electrical isolation (>500 VDC) ensures that voltage spikes or ground potential differences on the communication lines do not affect the host system.
Use Cases and Applications:
- Industrial automation systems requiring reliable serial communication with PLCs, sensors, and actuators.
- Data acquisition systems connecting to RS-485-based instrumentation.
- Building management systems (BMS) and HVAC controllers using RS-422/485 networks.
- Embedded systems requiring multiple isolated serial ports for field device communication.
- Legacy system integration where RS-422/485 connectivity is required for existing equipment.
Compatibility:
- Compatible with DOS and Windows operating systems via included drivers.
- Supports standard serial communication protocols and software that utilize COM ports.
- Can be integrated into industrial PCs, rack-mounted controllers, or embedded computing platforms with available expansion slots.
5. Components & Accessories
Included Items:
- AR-B9012 main interface card (175 × 107 mm)
- Driver software package (DOS and Windows)
- User manual and installation guide
Optional Accessories:
- RS-422/485 terminal block adapter for easy wiring
- DB9-to-terminal breakout cables
- Mounting brackets or standoffs for secure installation
- Extended cable kits for remote device connection
- Additional driver or configuration utilities for advanced system integration
Connectors:
- Two serial communication connectors (DB9 or terminal block, depending on configuration)
- System bus connector for host interface
- Optional jumper blocks or DIP switches for COM port and IRQ configuration
6. Installation & Setup
System Requirements:
- Compatible host system with available expansion slot (ISA or equivalent, depending on model variant)
- Supported operating system (DOS or Windows)
- Available IRQ lines (2–5, 10–12, 15) and COM address space (COM1–COM8)
Installation Procedure:
1. Power down the host system and disconnect it from the power source.
2. Insert the AR-B9012 card into an available expansion slot.
3. Secure the card using the mounting bracket or screws provided.
4. Configure the desired COM port address and IRQ settings using onboard jumpers or DIP switches.
5. Connect external RS-422/485 devices to the communication ports using appropriate cables or terminal adapters.
6. Power on the system and install the provided DOS/Windows drivers.
7. Verify proper operation using diagnostic utilities or communication software.
Mounting Options:
- Direct installation into industrial PC chassis or embedded controller slots.
- Optional DIN-rail or panel-mount adapters for specialized enclosures.
Configuration:
- Hardware configuration via jumpers or DIP switches for port address and IRQ selection.
- Software configuration through driver utilities for communication parameters (baud rate, parity, stop bits, etc.).
7. Performance & Capabilities
- Data Rate: Up to 115 kbps per port, suitable for most industrial and automation communication requirements.
- Transmission Mode: Asynchronous, full-duplex (RS-422) or half-duplex (RS-485).
- Isolation: >500 VDC galvanic isolation ensures high noise immunity and protection against voltage surges.
- Reliability: Designed for continuous 24/7 operation in industrial environments.
- Latency: Minimal communication latency due to efficient UART16450 buffering.
- Capacity: Two independent communication channels allow simultaneous data exchange with multiple devices.
- Efficiency: Low power consumption and optimized signal integrity for long cable runs typical of RS-485 networks.
- Limitations:
- Maximum data rate limited to 115 kbps (not suitable for high-speed serial applications).
- Requires manual configuration of IRQ and COM settings.
- Limited to DOS and Windows driver support (no native Linux driver specified).
8. Standards & Compliance
- Communication Standards:
- RS-422 (EIA-422)
- RS-485 (EIA-485)
- Electrical Isolation: >500 VDC in compliance with industrial safety and EMC standards.
- Regulatory Compliance:
- CE (Conformité Européenne) compliant for electromagnetic compatibility (EMC).
- RoHS (Restriction of Hazardous Substances) compliant materials.
- Designed to meet industrial-grade reliability and safety standards.
- Industry Standards:
- Compatible with standard UART-based serial communication protocols.
- Conforms to PC/AT bus interface specifications (for ISA-based variants).
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–2 years) covering defects in materials and workmanship.
Technical Support:
- Comprehensive technical documentation, including installation guides and driver manuals.
- Online support resources and driver downloads available from the manufacturer’s website.
- Email and phone-based technical assistance for configuration and troubleshooting.
Maintenance:
- Minimal maintenance required; periodic inspection of connectors and cables recommended.
- Ensure proper grounding and shielding of communication lines to maintain isolation integrity.
Firmware & Software Updates:
- Driver updates available for supported operating systems (DOS, Windows).
- Configuration utilities may be updated periodically to enhance compatibility and performance.
Serviceability:
- Field-replaceable card; can be easily swapped in case of failure.
- Diagnostic LEDs or software tools (if available) assist in identifying communication issues.
Environmental Considerations:
- Designed for industrial environments with moderate temperature and humidity ranges.
- Use in clean, dry, and well-ventilated enclosures recommended for optimal longevity.
Summary
The AR-B9012 is a robust, dual-port RS-422/485 asynchronous serial communication card engineered for industrial and embedded applications requiring reliable, isolated data transmission. With its UART16450 controller, >500 VDC isolation, and configurable IRQ and COM port settings, it provides flexible integration into a wide range of systems. Supporting data rates up to 115 kbps, the AR-B9012 ensures stable communication with industrial devices, sensors, and controllers. Its DOS and Windows driver support, compact 175 × 107 mm form factor, and durable construction make it a dependable solution for industrial automation, data acquisition, and control systems where electrical isolation and reliability are critical.
Product Name: AR-B9012
Model Number: AR-B9012
Series: AR-B Industrial Communication Interface Series
Article Number: AR-B9012
Manufacturer: AR-B (Industrial Computing Solutions Division)
The AR-B9012 is a dual-port asynchronous serial communication interface card designed for industrial and embedded computing environments requiring robust, isolated RS-422/485 connectivity. It provides two independent serial ports supporting asynchronous data transmission with full electrical isolation, ensuring reliable communication in electrically noisy or high-interference environments. The board is engineered for integration into industrial PCs, automation controllers, and embedded systems that demand stable, high-integrity serial communication channels.
2. Key Features
- Dual-Port RS-422/485 Interface: Provides two independent asynchronous serial communication ports supporting RS-422 and RS-485 standards.
- Asynchronous Serial Communication: Each port operates asynchronously, allowing flexible data exchange between devices without requiring a shared clock signal.
- High Electrical Isolation: Each communication channel is isolated to withstand voltages greater than 500 VDC, protecting both the host system and connected devices from ground loops, surges, and electrical noise.
- Configurable Interrupts: Supports multiple interrupt request (IRQ) lines — IRQ 2–5, 10–12, and 15 — enabling flexible system integration and conflict-free operation in multi-device environments.
- COM Port Address Range: Configurable for COM1 through COM8, allowing easy assignment and compatibility with legacy and modern systems.
- UART16450 Controller: Each port is equipped with a UART16450 chip, providing reliable serial data buffering and control for stable communication up to 115 kbps.
- Driver Support: Includes software drivers for DOS and Windows operating systems, ensuring compatibility with a wide range of industrial and legacy applications.
- Compact Form Factor: The board measures 175 mm x 107 mm, suitable for integration into compact industrial enclosures or embedded systems.
- Industrial Reliability: Designed for continuous operation in demanding environments, with robust electrical design and high-quality components.
3. Technical Specifications
- Interface Type: RS-422 / RS-485 (asynchronous serial communication)
- Number of Ports: 2 independent serial ports
- Controller IC: UART16450
- Maximum Data Rate: 115 kbps (asynchronous mode)
- Isolation Voltage: >500 VDC (galvanic isolation between communication channels and system bus)
- Interrupt Lines: Selectable IRQ 2–5, 10–12, 15
- COM Port Assignment: Configurable COM1–COM8
- Board Dimensions: 175 mm (length) × 107 mm (width)
- Weight: Approximately 150–200 g (typical, depending on configuration)
- Power Requirements: Standard PC bus power (exact voltage and current draw dependent on system configuration)
- Operating Temperature Range: Typically 0°C to 60°C (industrial-grade tolerance)
- Storage Temperature Range: -20°C to 85°C
- Relative Humidity: 5%–95% non-condensing
- Material Composition: Multi-layer PCB with industrial-grade components, gold-plated connectors, and reinforced isolation barriers
- Connector Type: Standard DB9 or terminal block connectors (depending on configuration or optional accessory kit)
4. Functionality
The AR-B9012 functions as a dual-port serial communication interface card that enables a host computer or embedded controller to communicate with external devices using RS-422 or RS-485 protocols. Each port operates independently, allowing simultaneous communication with two separate devices or networks.
Operational Principle:
- The onboard UART16450 controller manages data buffering, transmission, and reception for each port.
- The card interfaces with the system bus, mapping each port to a selectable COM address (COM1–COM8).
- Interrupts can be assigned to specific IRQ lines (2–5, 10–12, 15) to optimize system performance and prevent conflicts.
- Electrical isolation (>500 VDC) ensures that voltage spikes or ground potential differences on the communication lines do not affect the host system.
Use Cases and Applications:
- Industrial automation systems requiring reliable serial communication with PLCs, sensors, and actuators.
- Data acquisition systems connecting to RS-485-based instrumentation.
- Building management systems (BMS) and HVAC controllers using RS-422/485 networks.
- Embedded systems requiring multiple isolated serial ports for field device communication.
- Legacy system integration where RS-422/485 connectivity is required for existing equipment.
Compatibility:
- Compatible with DOS and Windows operating systems via included drivers.
- Supports standard serial communication protocols and software that utilize COM ports.
- Can be integrated into industrial PCs, rack-mounted controllers, or embedded computing platforms with available expansion slots.
5. Components & Accessories
Included Items:
- AR-B9012 main interface card (175 × 107 mm)
- Driver software package (DOS and Windows)
- User manual and installation guide
Optional Accessories:
- RS-422/485 terminal block adapter for easy wiring
- DB9-to-terminal breakout cables
- Mounting brackets or standoffs for secure installation
- Extended cable kits for remote device connection
- Additional driver or configuration utilities for advanced system integration
Connectors:
- Two serial communication connectors (DB9 or terminal block, depending on configuration)
- System bus connector for host interface
- Optional jumper blocks or DIP switches for COM port and IRQ configuration
6. Installation & Setup
System Requirements:
- Compatible host system with available expansion slot (ISA or equivalent, depending on model variant)
- Supported operating system (DOS or Windows)
- Available IRQ lines (2–5, 10–12, 15) and COM address space (COM1–COM8)
Installation Procedure:
1. Power down the host system and disconnect it from the power source.
2. Insert the AR-B9012 card into an available expansion slot.
3. Secure the card using the mounting bracket or screws provided.
4. Configure the desired COM port address and IRQ settings using onboard jumpers or DIP switches.
5. Connect external RS-422/485 devices to the communication ports using appropriate cables or terminal adapters.
6. Power on the system and install the provided DOS/Windows drivers.
7. Verify proper operation using diagnostic utilities or communication software.
Mounting Options:
- Direct installation into industrial PC chassis or embedded controller slots.
- Optional DIN-rail or panel-mount adapters for specialized enclosures.
Configuration:
- Hardware configuration via jumpers or DIP switches for port address and IRQ selection.
- Software configuration through driver utilities for communication parameters (baud rate, parity, stop bits, etc.).
7. Performance & Capabilities
- Data Rate: Up to 115 kbps per port, suitable for most industrial and automation communication requirements.
- Transmission Mode: Asynchronous, full-duplex (RS-422) or half-duplex (RS-485).
- Isolation: >500 VDC galvanic isolation ensures high noise immunity and protection against voltage surges.
- Reliability: Designed for continuous 24/7 operation in industrial environments.
- Latency: Minimal communication latency due to efficient UART16450 buffering.
- Capacity: Two independent communication channels allow simultaneous data exchange with multiple devices.
- Efficiency: Low power consumption and optimized signal integrity for long cable runs typical of RS-485 networks.
- Limitations:
- Maximum data rate limited to 115 kbps (not suitable for high-speed serial applications).
- Requires manual configuration of IRQ and COM settings.
- Limited to DOS and Windows driver support (no native Linux driver specified).
8. Standards & Compliance
- Communication Standards:
- RS-422 (EIA-422)
- RS-485 (EIA-485)
- Electrical Isolation: >500 VDC in compliance with industrial safety and EMC standards.
- Regulatory Compliance:
- CE (Conformité Européenne) compliant for electromagnetic compatibility (EMC).
- RoHS (Restriction of Hazardous Substances) compliant materials.
- Designed to meet industrial-grade reliability and safety standards.
- Industry Standards:
- Compatible with standard UART-based serial communication protocols.
- Conforms to PC/AT bus interface specifications (for ISA-based variants).
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–2 years) covering defects in materials and workmanship.
Technical Support:
- Comprehensive technical documentation, including installation guides and driver manuals.
- Online support resources and driver downloads available from the manufacturer’s website.
- Email and phone-based technical assistance for configuration and troubleshooting.
Maintenance:
- Minimal maintenance required; periodic inspection of connectors and cables recommended.
- Ensure proper grounding and shielding of communication lines to maintain isolation integrity.
Firmware & Software Updates:
- Driver updates available for supported operating systems (DOS, Windows).
- Configuration utilities may be updated periodically to enhance compatibility and performance.
Serviceability:
- Field-replaceable card; can be easily swapped in case of failure.
- Diagnostic LEDs or software tools (if available) assist in identifying communication issues.
Environmental Considerations:
- Designed for industrial environments with moderate temperature and humidity ranges.
- Use in clean, dry, and well-ventilated enclosures recommended for optimal longevity.
Summary
The AR-B9012 is a robust, dual-port RS-422/485 asynchronous serial communication card engineered for industrial and embedded applications requiring reliable, isolated data transmission. With its UART16450 controller, >500 VDC isolation, and configurable IRQ and COM port settings, it provides flexible integration into a wide range of systems. Supporting data rates up to 115 kbps, the AR-B9012 ensures stable communication with industrial devices, sensors, and controllers. Its DOS and Windows driver support, compact 175 × 107 mm form factor, and durable construction make it a dependable solution for industrial automation, data acquisition, and control systems where electrical isolation and reliability are critical.
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