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- Four Independent Serial Ports: The CI-134 provides four RS-422/485 ports, allowing simultaneous communication with multiple serial devices.
- High-Speed Data Transmission: Supports baud rates from 50 bps to 921,600 bps (921.6 kbps), ensuring compatibility with both legacy and modern serial devices.
- Auto Data Direction Switching: Built-in automatic data direction control for RS-485 communication eliminates the need for manual RTS signal handling, simplifying software development and improving communication reliability.
- Flexible Interrupt Configuration: Supports IRQ 2–5, 7, 10–12, and 15, allowing flexible resource allocation and minimizing conflicts with other system devices.
- Standard Interface Connectors: Each port uses a male DB9 connector, ensuring compatibility with standard serial cables and accessories.
- Compact Form Factor: The board measures 157 mm × 83 mm, suitable for installation in standard PC expansion slots.
- Industrial Reliability: Designed for stable operation in industrial environments, with robust electrical design and high noise immunity.
- Wide Compatibility: Compatible with a range of operating systems and industrial control software, supporting both RS-422 and RS-485 communication modes.
- Hardware Flow Control: Supports hardware-based flow control for reliable data transmission in multi-drop or point-to-point configurations.
- Ease of Integration: Ideal for connecting PLCs, sensors, controllers, and other serial devices to PC-based control systems.
- High-Speed Data Transmission: Supports baud rates from 50 bps to 921,600 bps (921.6 kbps), ensuring compatibility with both legacy and modern serial devices.
- Auto Data Direction Switching: Built-in automatic data direction control for RS-485 communication eliminates the need for manual RTS signal handling, simplifying software development and improving communication reliability.
- Flexible Interrupt Configuration: Supports IRQ 2–5, 7, 10–12, and 15, allowing flexible resource allocation and minimizing conflicts with other system devices.
- Standard Interface Connectors: Each port uses a male DB9 connector, ensuring compatibility with standard serial cables and accessories.
- Compact Form Factor: The board measures 157 mm × 83 mm, suitable for installation in standard PC expansion slots.
- Industrial Reliability: Designed for stable operation in industrial environments, with robust electrical design and high noise immunity.
- Wide Compatibility: Compatible with a range of operating systems and industrial control software, supporting both RS-422 and RS-485 communication modes.
- Hardware Flow Control: Supports hardware-based flow control for reliable data transmission in multi-drop or point-to-point configurations.
- Ease of Integration: Ideal for connecting PLCs, sensors, controllers, and other serial devices to PC-based control systems.
1. Product Overview
Product Name: CI-134
Model: CI-134
Series: MOXA CI Series Multiport Serial Boards
Article Number: CI-134
Manufacturer: MOXA Inc.
The MOXA CI-134 is a high-performance, industrial-grade 4-port RS-422/485 serial communication board designed for PC-based systems requiring reliable, high-speed, and multi-channel serial connectivity. It is part of MOXA’s CI Series of intelligent multiport serial interface cards, engineered for industrial automation, data acquisition, and communication control applications. The CI-134 provides four independent RS-422/485 serial ports with automatic data direction control, supporting data rates from 50 bps up to 921.6 kbps. It is designed for use in systems that require robust serial communication over long distances or in electrically noisy environments.
2. Key Features
- Four Independent Serial Ports: The CI-134 provides four RS-422/485 ports, allowing simultaneous communication with multiple serial devices.
- High-Speed Data Transmission: Supports baud rates from 50 bps to 921,600 bps (921.6 kbps), ensuring compatibility with both legacy and modern serial devices.
- Auto Data Direction Switching: Built-in automatic data direction control for RS-485 communication eliminates the need for manual RTS signal handling, simplifying software development and improving communication reliability.
- Flexible Interrupt Configuration: Supports IRQ 2–5, 7, 10–12, and 15, allowing flexible resource allocation and minimizing conflicts with other system devices.
- Standard Interface Connectors: Each port uses a male DB9 connector, ensuring compatibility with standard serial cables and accessories.
- Compact Form Factor: The board measures 157 mm × 83 mm, suitable for installation in standard PC expansion slots.
- Industrial Reliability: Designed for stable operation in industrial environments, with robust electrical design and high noise immunity.
- Wide Compatibility: Compatible with a range of operating systems and industrial control software, supporting both RS-422 and RS-485 communication modes.
- Hardware Flow Control: Supports hardware-based flow control for reliable data transmission in multi-drop or point-to-point configurations.
- Ease of Integration: Ideal for connecting PLCs, sensors, controllers, and other serial devices to PC-based control systems.
3. Technical Specifications
- Product Type: Multiport Serial Communication Board
- Number of Ports: 4 independent serial ports
- Interface Standards: RS-422 / RS-485
- Baud Rate: 50 bps to 921,600 bps (50–921.6 kbps)
- Data Direction Control: Automatic (auto data direction switching)
- Interrupt Request (IRQ) Options: 2, 3, 4, 5, 7, 10, 11, 12, 15
- Connector Type: Male DB9 (x4)
- Dimensions: 157 mm (L) × 83 mm (W)
- Form Factor: Standard AT expansion card
- Weight: Approximately 150–200 g (typical for this form factor)
- Bus Interface: AT bus (ISA-compatible)
- Signal Lines (RS-422/485): TX+, TX−, RX+, RX−, GND
- Transmission Distance: Up to 1,200 meters (RS-422 typical) depending on cable quality and baud rate
- Isolation: Typically non-isolated (external isolation modules available if required)
- Power Requirements: +5 VDC from system bus (typical consumption < 500 mA)
- Operating Temperature: 0°C to 55°C (standard operating range)
- Storage Temperature: −20°C to 85°C
- Humidity: 5% to 95% RH (non-condensing)
- Material: PCB with industrial-grade components, gold-plated edge connector
4. Functionality
The MOXA CI-134 functions as a four-channel serial communication interface card that enables a PC to communicate with multiple RS-422 or RS-485 devices simultaneously. Each port can be configured independently for RS-422 or RS-485 operation, allowing flexible deployment in mixed communication environments.
How It Works:
- The board is installed in a PC’s AT (ISA) expansion slot.
- Each of the four ports appears as a standard COM port to the operating system.
- The auto data direction switching feature automatically controls the transmit and receive lines in RS-485 mode, ensuring seamless half-duplex communication without requiring software intervention.
- The board’s driver software manages interrupts and data buffering, ensuring efficient data flow even under high-load conditions.
Use Cases and Applications:
- Industrial automation systems connecting PLCs, HMIs, and sensors
- Building management systems (BMS) and environmental monitoring
- SCADA (Supervisory Control and Data Acquisition) systems
- Factory equipment communication and control
- Data acquisition from serial instruments and meters
- Transportation and traffic control systems
- Legacy system integration where RS-422/485 communication is required
Compatibility:
- Compatible with standard PC architectures supporting AT/ISA bus
- Works with a wide range of operating systems (DOS, Windows, Linux, and others with MOXA drivers)
- Supports integration with industrial communication protocols such as Modbus RTU, DNP3, and proprietary serial protocols
5. Components & Accessories
Included Items:
- MOXA CI-134 4-port RS-422/485 AT card
- User manual and installation guide
- Driver and utility software (typically provided on CD or downloadable from MOXA website)
Optional Accessories:
- DB9-to-terminal block adapters for easy wiring to field devices
- Shielded serial cables (DB9 male to DB9 female or terminal block)
- Isolation modules or surge protectors for enhanced electrical protection
- Mounting brackets or retention clips for secure installation in industrial PCs
Connectors:
- Four male DB9 connectors on the card’s external bracket
- Each connector provides differential signal pairs for RS-422/485 communication
6. Installation & Setup
Requirements:
- Compatible PC with available AT (ISA) expansion slot
- Operating system with MOXA driver support
- Power supply from system bus (+5 VDC)
Installation Steps:
1. Power off the PC and remove the cover.
2. Insert the CI-134 card into an available ISA slot, ensuring proper alignment.
3. Secure the card with the mounting screw.
4. Connect serial cables to the DB9 connectors.
5. Power on the PC and install the MOXA driver software.
6. Configure COM port assignments and IRQ settings using the provided utility or system BIOS.
7. Verify communication with connected devices using terminal software or diagnostic tools.
Mounting Options:
- Standard internal mounting in PC chassis
- Can be used in industrial PCs or rack-mounted systems with ISA slots
Configuration:
- Software-selectable communication parameters (baud rate, parity, stop bits, data bits)
- Hardware or software configuration for RS-422 or RS-485 mode
- Automatic data direction control eliminates manual RTS configuration
7. Performance & Capabilities
Speed:
- Supports data transmission rates from 50 bps to 921,600 bps, suitable for both low-speed sensors and high-speed industrial controllers.
Capacity:
- Four independent serial channels allow simultaneous communication with multiple devices.
- Each port supports full-duplex (RS-422) or half-duplex (RS-485) operation.
Efficiency:
- Auto data direction switching optimizes half-duplex communication, reducing latency and CPU overhead.
- Efficient interrupt handling ensures minimal data loss even under heavy communication loads.
Reliability:
- Designed for continuous operation in industrial environments.
- High noise immunity and robust signal integrity over long cable runs.
Limitations:
- Requires an ISA slot (not compatible with modern PCI or PCIe systems without adapters).
- No built-in optical isolation (external isolation recommended for high-voltage environments).
- Limited to 4 ports per card (expandable with multiple cards if system resources allow).
8. Standards & Compliance
Electrical Standards:
- Complies with EIA/TIA RS-422 and RS-485 interface standards.
Regulatory Compliance:
- CE compliant (EMC and safety standards)
- FCC Class A compliance for industrial environments
- RoHS compliant (lead-free manufacturing)
Industry Standards:
- Compatible with Modbus RTU and other serial communication protocols
- Designed according to industrial communication interface specifications
Quality Assurance:
- Manufactured under ISO 9001-certified quality management system
- Tested for electrical reliability, signal integrity, and environmental durability
9. Additional Information
Warranty:
- Typically covered by MOXA’s standard 3-year limited warranty (subject to region and distributor policy).
Support:
- Comprehensive technical support available via MOXA’s global support network.
- Online resources include driver downloads, firmware updates, and configuration guides.
Maintenance:
- Minimal maintenance required; periodic inspection of connectors and cables recommended.
- Firmware and driver updates available to ensure compatibility with new operating systems.
Updates & Longevity:
- Long-term product availability typical of MOXA industrial products, ensuring continuity for OEM and system integrator applications.
- Backward compatibility with earlier CI-series models for seamless system upgrades.
Summary:
The MOXA CI-134 is a robust, industrial-grade 4-port RS-422/485 AT communication card engineered for high-speed, reliable serial data transmission in PC-based control and automation systems. With support for baud rates up to 921.6 kbps, automatic data direction switching, flexible IRQ configuration, and standard DB9 connectors, it provides a versatile and dependable solution for connecting multiple serial devices in industrial, commercial, and embedded environments. Its compact 157 × 83 mm form factor, wide compatibility, and proven MOXA reliability make it an ideal choice for engineers and system integrators seeking stable, long-term serial communication performance.
Product Name: CI-134
Model: CI-134
Series: MOXA CI Series Multiport Serial Boards
Article Number: CI-134
Manufacturer: MOXA Inc.
The MOXA CI-134 is a high-performance, industrial-grade 4-port RS-422/485 serial communication board designed for PC-based systems requiring reliable, high-speed, and multi-channel serial connectivity. It is part of MOXA’s CI Series of intelligent multiport serial interface cards, engineered for industrial automation, data acquisition, and communication control applications. The CI-134 provides four independent RS-422/485 serial ports with automatic data direction control, supporting data rates from 50 bps up to 921.6 kbps. It is designed for use in systems that require robust serial communication over long distances or in electrically noisy environments.
2. Key Features
- Four Independent Serial Ports: The CI-134 provides four RS-422/485 ports, allowing simultaneous communication with multiple serial devices.
- High-Speed Data Transmission: Supports baud rates from 50 bps to 921,600 bps (921.6 kbps), ensuring compatibility with both legacy and modern serial devices.
- Auto Data Direction Switching: Built-in automatic data direction control for RS-485 communication eliminates the need for manual RTS signal handling, simplifying software development and improving communication reliability.
- Flexible Interrupt Configuration: Supports IRQ 2–5, 7, 10–12, and 15, allowing flexible resource allocation and minimizing conflicts with other system devices.
- Standard Interface Connectors: Each port uses a male DB9 connector, ensuring compatibility with standard serial cables and accessories.
- Compact Form Factor: The board measures 157 mm × 83 mm, suitable for installation in standard PC expansion slots.
- Industrial Reliability: Designed for stable operation in industrial environments, with robust electrical design and high noise immunity.
- Wide Compatibility: Compatible with a range of operating systems and industrial control software, supporting both RS-422 and RS-485 communication modes.
- Hardware Flow Control: Supports hardware-based flow control for reliable data transmission in multi-drop or point-to-point configurations.
- Ease of Integration: Ideal for connecting PLCs, sensors, controllers, and other serial devices to PC-based control systems.
3. Technical Specifications
- Product Type: Multiport Serial Communication Board
- Number of Ports: 4 independent serial ports
- Interface Standards: RS-422 / RS-485
- Baud Rate: 50 bps to 921,600 bps (50–921.6 kbps)
- Data Direction Control: Automatic (auto data direction switching)
- Interrupt Request (IRQ) Options: 2, 3, 4, 5, 7, 10, 11, 12, 15
- Connector Type: Male DB9 (x4)
- Dimensions: 157 mm (L) × 83 mm (W)
- Form Factor: Standard AT expansion card
- Weight: Approximately 150–200 g (typical for this form factor)
- Bus Interface: AT bus (ISA-compatible)
- Signal Lines (RS-422/485): TX+, TX−, RX+, RX−, GND
- Transmission Distance: Up to 1,200 meters (RS-422 typical) depending on cable quality and baud rate
- Isolation: Typically non-isolated (external isolation modules available if required)
- Power Requirements: +5 VDC from system bus (typical consumption < 500 mA)
- Operating Temperature: 0°C to 55°C (standard operating range)
- Storage Temperature: −20°C to 85°C
- Humidity: 5% to 95% RH (non-condensing)
- Material: PCB with industrial-grade components, gold-plated edge connector
4. Functionality
The MOXA CI-134 functions as a four-channel serial communication interface card that enables a PC to communicate with multiple RS-422 or RS-485 devices simultaneously. Each port can be configured independently for RS-422 or RS-485 operation, allowing flexible deployment in mixed communication environments.
How It Works:
- The board is installed in a PC’s AT (ISA) expansion slot.
- Each of the four ports appears as a standard COM port to the operating system.
- The auto data direction switching feature automatically controls the transmit and receive lines in RS-485 mode, ensuring seamless half-duplex communication without requiring software intervention.
- The board’s driver software manages interrupts and data buffering, ensuring efficient data flow even under high-load conditions.
Use Cases and Applications:
- Industrial automation systems connecting PLCs, HMIs, and sensors
- Building management systems (BMS) and environmental monitoring
- SCADA (Supervisory Control and Data Acquisition) systems
- Factory equipment communication and control
- Data acquisition from serial instruments and meters
- Transportation and traffic control systems
- Legacy system integration where RS-422/485 communication is required
Compatibility:
- Compatible with standard PC architectures supporting AT/ISA bus
- Works with a wide range of operating systems (DOS, Windows, Linux, and others with MOXA drivers)
- Supports integration with industrial communication protocols such as Modbus RTU, DNP3, and proprietary serial protocols
5. Components & Accessories
Included Items:
- MOXA CI-134 4-port RS-422/485 AT card
- User manual and installation guide
- Driver and utility software (typically provided on CD or downloadable from MOXA website)
Optional Accessories:
- DB9-to-terminal block adapters for easy wiring to field devices
- Shielded serial cables (DB9 male to DB9 female or terminal block)
- Isolation modules or surge protectors for enhanced electrical protection
- Mounting brackets or retention clips for secure installation in industrial PCs
Connectors:
- Four male DB9 connectors on the card’s external bracket
- Each connector provides differential signal pairs for RS-422/485 communication
6. Installation & Setup
Requirements:
- Compatible PC with available AT (ISA) expansion slot
- Operating system with MOXA driver support
- Power supply from system bus (+5 VDC)
Installation Steps:
1. Power off the PC and remove the cover.
2. Insert the CI-134 card into an available ISA slot, ensuring proper alignment.
3. Secure the card with the mounting screw.
4. Connect serial cables to the DB9 connectors.
5. Power on the PC and install the MOXA driver software.
6. Configure COM port assignments and IRQ settings using the provided utility or system BIOS.
7. Verify communication with connected devices using terminal software or diagnostic tools.
Mounting Options:
- Standard internal mounting in PC chassis
- Can be used in industrial PCs or rack-mounted systems with ISA slots
Configuration:
- Software-selectable communication parameters (baud rate, parity, stop bits, data bits)
- Hardware or software configuration for RS-422 or RS-485 mode
- Automatic data direction control eliminates manual RTS configuration
7. Performance & Capabilities
Speed:
- Supports data transmission rates from 50 bps to 921,600 bps, suitable for both low-speed sensors and high-speed industrial controllers.
Capacity:
- Four independent serial channels allow simultaneous communication with multiple devices.
- Each port supports full-duplex (RS-422) or half-duplex (RS-485) operation.
Efficiency:
- Auto data direction switching optimizes half-duplex communication, reducing latency and CPU overhead.
- Efficient interrupt handling ensures minimal data loss even under heavy communication loads.
Reliability:
- Designed for continuous operation in industrial environments.
- High noise immunity and robust signal integrity over long cable runs.
Limitations:
- Requires an ISA slot (not compatible with modern PCI or PCIe systems without adapters).
- No built-in optical isolation (external isolation recommended for high-voltage environments).
- Limited to 4 ports per card (expandable with multiple cards if system resources allow).
8. Standards & Compliance
Electrical Standards:
- Complies with EIA/TIA RS-422 and RS-485 interface standards.
Regulatory Compliance:
- CE compliant (EMC and safety standards)
- FCC Class A compliance for industrial environments
- RoHS compliant (lead-free manufacturing)
Industry Standards:
- Compatible with Modbus RTU and other serial communication protocols
- Designed according to industrial communication interface specifications
Quality Assurance:
- Manufactured under ISO 9001-certified quality management system
- Tested for electrical reliability, signal integrity, and environmental durability
9. Additional Information
Warranty:
- Typically covered by MOXA’s standard 3-year limited warranty (subject to region and distributor policy).
Support:
- Comprehensive technical support available via MOXA’s global support network.
- Online resources include driver downloads, firmware updates, and configuration guides.
Maintenance:
- Minimal maintenance required; periodic inspection of connectors and cables recommended.
- Firmware and driver updates available to ensure compatibility with new operating systems.
Updates & Longevity:
- Long-term product availability typical of MOXA industrial products, ensuring continuity for OEM and system integrator applications.
- Backward compatibility with earlier CI-series models for seamless system upgrades.
Summary:
The MOXA CI-134 is a robust, industrial-grade 4-port RS-422/485 AT communication card engineered for high-speed, reliable serial data transmission in PC-based control and automation systems. With support for baud rates up to 921.6 kbps, automatic data direction switching, flexible IRQ configuration, and standard DB9 connectors, it provides a versatile and dependable solution for connecting multiple serial devices in industrial, commercial, and embedded environments. Its compact 157 × 83 mm form factor, wide compatibility, and proven MOXA reliability make it an ideal choice for engineers and system integrators seeking stable, long-term serial communication performance.
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