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- Dual Independent RS-422/RS-485 Ports: Two fully independent asynchronous serial ports supporting both RS-422 and RS-485 standards.
- High-Speed Operation: Supports baud rates from 50 bps up to 921.6 Kbps using TI550C UARTs with on-chip hardware flow control.
- Optical Isolation and Surge Protection: Provides up to 2 kV isolation and 2 kV surge protection, ensuring safe operation in harsh industrial environments.
- Software-Configurable Hardware: No jumpers or DIP switches; all configuration (I/O address, IRQ, interrupt vector) is handled via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Custom ASIC Design: Reduces board size to half-length ISA form factor while maintaining full 16-bit AT bus compatibility.
- Flexible Communication Modes: Supports RS-422 point-to-point full-duplex and broadcasting, as well as RS-485 point-to-point and multidrop, in both half- and full-duplex modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, SCO UNIX/XENIX/OpenServer, OS/2, Linux, QNX, and FreeBSD.
- Driver and Utility Support: Includes Moxa-provided drivers for DOS, Windows 95, and Windows NT, plus diagnostic and programming tools (PComm for Windows, API-232 for DOS).
- High Reliability: Designed for industrial automation, data acquisition, and control systems requiring stable, long-distance serial communication.
- High-Speed Operation: Supports baud rates from 50 bps up to 921.6 Kbps using TI550C UARTs with on-chip hardware flow control.
- Optical Isolation and Surge Protection: Provides up to 2 kV isolation and 2 kV surge protection, ensuring safe operation in harsh industrial environments.
- Software-Configurable Hardware: No jumpers or DIP switches; all configuration (I/O address, IRQ, interrupt vector) is handled via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Custom ASIC Design: Reduces board size to half-length ISA form factor while maintaining full 16-bit AT bus compatibility.
- Flexible Communication Modes: Supports RS-422 point-to-point full-duplex and broadcasting, as well as RS-485 point-to-point and multidrop, in both half- and full-duplex modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, SCO UNIX/XENIX/OpenServer, OS/2, Linux, QNX, and FreeBSD.
- Driver and Utility Support: Includes Moxa-provided drivers for DOS, Windows 95, and Windows NT, plus diagnostic and programming tools (PComm for Windows, API-232 for DOS).
- High Reliability: Designed for industrial automation, data acquisition, and control systems requiring stable, long-distance serial communication.
1. Product Overview
Product Name: C102HIS
Model: C102HIS
Series: C102 Family – Universal RS-422/RS-485 2-Port Serial Boards
Article Number: C102HIS
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa C102HIS is a dual-port asynchronous serial communication board designed for industrial-grade RS-422 and RS-485 applications. It belongs to the C102 family of multiport serial boards, which includes models C102P, C102H, C102HI, and C102HIS. The C102HIS represents the top-tier configuration in this series, integrating both 2 kV optical isolation and 2 kV surge protection for maximum reliability in electrically noisy or high-voltage industrial environments. It uses a high-speed TI550C UART and a custom ASIC design to deliver robust, high-performance serial communication over long distances (up to 4000 ft).
2. Key Features
- Dual Independent RS-422/RS-485 Ports: Two fully independent asynchronous serial ports supporting both RS-422 and RS-485 standards.
- High-Speed Operation: Supports baud rates from 50 bps up to 921.6 Kbps using TI550C UARTs with on-chip hardware flow control.
- Optical Isolation and Surge Protection: Provides up to 2 kV isolation and 2 kV surge protection, ensuring safe operation in harsh industrial environments.
- Software-Configurable Hardware: No jumpers or DIP switches; all configuration (I/O address, IRQ, interrupt vector) is handled via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Custom ASIC Design: Reduces board size to half-length ISA form factor while maintaining full 16-bit AT bus compatibility.
- Flexible Communication Modes: Supports RS-422 point-to-point full-duplex and broadcasting, as well as RS-485 point-to-point and multidrop, in both half- and full-duplex modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, SCO UNIX/XENIX/OpenServer, OS/2, Linux, QNX, and FreeBSD.
- Driver and Utility Support: Includes Moxa-provided drivers for DOS, Windows 95, and Windows NT, plus diagnostic and programming tools (PComm for Windows, API-232 for DOS).
- High Reliability: Designed for industrial automation, data acquisition, and control systems requiring stable, long-distance serial communication.
3. Technical Specifications
- Bus Interface: ISA (EISA compatible), 16-bit AT bus architecture
- Number of Ports: 2 independent RS-422/RS-485 ports
- I/O Address Range: 0x0000 – 0xFFFF (software selectable)
- IRQ Options: 2, 3, 4, 5, 7, 10, 11, 12, 15 (software selectable)
- UART Type: 2 × TI550C high-speed UARTs with hardware flow control
- Baud Rate: 50 bps to 921.6 Kbps (high-speed mode)
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5, 2
- Parity: None, Even, Odd, Space, Mark
- Connectors: 2 × DB9 male connectors
- Signal Lines: TxDA, TxDB, RxDA, RxDB, RTSA, RTSB, CTSA, CTSB, GND
- Isolation Protection: Up to 2000 V (optical isolation)
- Surge Protection: Up to 2000 V (transient voltage suppression)
- Operating Temperature: 0°C to 55°C
- Power Requirements: +5 V DC, maximum 750 mA
- Dimensions: 157 mm × 105 mm (15.7 cm × 10.5 cm)
- Weight: Approximately 200 g (typical for half-size ISA board)
- Maximum Cable Length: 4000 ft (RS-422/485 standard)
- Maximum Data Rate: 10 Mbps (RS-422/485 physical layer capability)
4. Functionality
The C102HIS provides two asynchronous serial communication channels that can operate in RS-422 or RS-485 mode. Each port is independently configurable for full-duplex or half-duplex operation.
- RS-422 Mode: Supports point-to-point full-duplex and broadcasting configurations. Ideal for long-distance, high-speed communication between two devices or one-to-many broadcast systems.
- RS-485 Mode: Supports both point-to-point and multidrop configurations, with up to 32 drivers and 32 receivers on a single bus. Operates in half- or full-duplex modes, with selectable echo or non-echo operation.
Applications:
- Industrial automation and process control
- Data acquisition systems
- SCADA and telemetry networks
- Remote terminal communication
- Machine-to-machine (M2M) serial networking
- Industrial instrumentation and monitoring
Compatibility:
The board is compatible with standard COM port assignments (COM1–COM4) and can coexist with other serial devices. It supports both interrupt-driven and polling modes for data handling.
5. Components & Accessories
Included Items:
1. C102HIS dual-port RS-422/RS-485 board
2. User’s Manual (printed or digital)
3. Driver diskettes for DOS, Windows 95, and Windows NT (including Io-irq.exe, PComm, and API-232 utilities)
Optional Accessories:
- DB9-to-terminal block adapters for field wiring
- Shielded twisted-pair cables for RS-422/485 connections
- Surge-protected cabling for high-voltage environments
Connectors:
Each port uses a DB9 male connector with the following pin assignments:
1 – TxDA
2 – TxDB
3 – RxDB
4 – RxDA
5 – GND
6 – RTSA
7 – RTSB
8 – CTSB
9 – CTSA
6. Installation & Setup
Hardware Installation:
1. Power off the PC and insert the C102HIS into a free 16-bit ISA slot.
2. Ensure jumper JP1 is open (default). JP1 is only used to reset the Configuration Access Port (CAP) address to 0xA700 if forgotten.
3. Power on the PC and boot into DOS.
4. Run the configuration utility Io-irq.exe from the driver diskette to set I/O addresses, IRQs, and interrupt vectors.
5. Configuration data is stored in onboard EEPROM, eliminating the need for physical jumpers.
Default Factory Settings:
- I/O Address: 0x180 (Port 1), 0x188 (Port 2)
- IRQ: 10
- INT Vector: 0x1C0
- CAP Address: 0x180
Software Installation:
- Windows NT/95: Install via Setup95.exe or through Control Panel → Network → Adapters → “MOXA C102/C104/C168 Family Adapter.”
- DOS: Use API-232 driver package (DOSINST.EXE, SETUP.EXE, SER-DRV.EXE).
- UNIX/XENIX: Use built-in 2-port serial driver via `mkdev serial`.
Configuration Parameters:
- I/O Address and IRQ are software-selectable per port.
- Interrupt Vector can be enabled for improved performance.
- Tx/Rx Enable Modes: Always On, By Register, By RTS, or By /RTS.
7. Performance & Capabilities
- Speed: Up to 921.6 Kbps (high-speed mode).
- Throughput: Optimized via TI550C UARTs with 16-byte FIFO buffers and hardware flow control.
- Distance: Up to 4000 ft (1200 m) over twisted-pair cable.
- Signal Integrity: 2 kV isolation and surge protection prevent data loss due to electrical interference.
- Power Efficiency: Consumes up to 750 mA at +5 V DC.
- Multi-Board Support: Up to four C102-family boards can be installed in one system, provided sufficient IRQ and I/O resources.
- Driver Modes: Supports interrupt vector and polling modes; interrupt vector mode offers higher performance.
- Limitations: Requires ISA slot; not compatible with PCI-only systems.
8. Standards & Compliance
- Electrical Interface Standards: EIA RS-422, EIA RS-485
- Bus Interface: ISA (Industry Standard Architecture), EISA compatible
- Isolation & Surge Protection: 2 kV optical isolation and transient voltage suppression compliant with industrial safety standards
- Operating Systems Supported:
- DOS (API-232 driver)
- Windows 3.1, Windows 95, Windows NT (Moxa drivers)
- SCO UNIX/XENIX/OpenServer (standard driver)
- OS/2, Linux, QNX, FreeBSD (system-supported drivers)
- Regulatory Compliance: Designed for industrial EMC environments; conforms to general CE and FCC Class A requirements for industrial devices.
- Environmental Compliance: Operating temperature 0–55°C; suitable for standard industrial enclosures.
9. Additional Information
Warranty:
Standard Moxa limited hardware warranty (typically 3 years, depending on region). Covers defects in materials and workmanship under normal use.
Technical Support:
- Email: support@moxa.com.tw
- Website: [www.moxa.com](http://www.moxa.com) / [www.moxa.com.tw](http://www.moxa.com.tw)
- FTP Site: ftp.moxa.com or ftp.moxa.com.tw (User ID: ftp, Password: your_email_address) for driver and firmware updates.
Maintenance:
- Periodically inspect connectors and cabling for wear or corrosion.
- Ensure proper grounding and shielding in high-noise environments.
- Use Moxa diagnostic utilities (PComm Diagnostic, Data Scope) for port testing and troubleshooting.
Software Tools:
- Io-irq.exe: DOS-based configuration utility for setting I/O address, IRQ, and interrupt vector.
- PComm: Windows NT/95 serial communication library and diagnostic suite, including terminal emulator and port monitor.
- API-232: DOS communication library supporting C, Pascal, BASIC, and Assembly for custom application development.
- Data Scope: DOS utility for serial line monitoring, terminal emulation, and protocol-based file transfer (ASCII, XMODEM, YMODEM, ZMODEM, KERMIT).
Driver Updates:
Moxa provides continuous driver updates via its FTP and web services. Users can download the latest versions for Windows, DOS, and UNIX platforms to ensure compatibility with new operating systems.
Support Utilities:
- Diagnostic Utility: Tests IRQ, TxD/RxD, CTS/RTS, DTR/DSR, and DTR/DCD signals.
- Monitor Utility: Displays real-time port throughput and line status.
- Programming Libraries: Simplify development of serial communication applications using standard languages (C, Visual Basic, Delphi).
Troubleshooting Highlights:
- If the board is not detected, verify I/O address and IRQ settings, ensure JP1 is open, and check for slot or address conflicts.
- If communication fails, confirm correct wiring and matching RS-422/485 configuration.
- If CAP address is forgotten, short JP1 to force CAP to 0xA700, reconfigure using Io-irq.exe, then remove the jumper.
Summary
The Moxa C102HIS is a high-performance, industrial-grade dual-port RS-422/RS-485 serial communication board designed for reliable, long-distance data transmission in demanding environments. With its 2 kV optical isolation, 2 kV surge protection, and high-speed TI550C UARTs, it ensures robust operation even in electrically noisy conditions. The board’s software-configurable architecture, broad OS compatibility, and comprehensive driver and utility support make it an ideal solution for system integrators and engineers developing industrial automation, data acquisition, and control systems.
Its combination of hardware protection, flexible configuration, and cross-platform driver support positions the C102HIS as a versatile and durable communication interface for legacy ISA-based industrial computing platforms.
Product Name: C102HIS
Model: C102HIS
Series: C102 Family – Universal RS-422/RS-485 2-Port Serial Boards
Article Number: C102HIS
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa C102HIS is a dual-port asynchronous serial communication board designed for industrial-grade RS-422 and RS-485 applications. It belongs to the C102 family of multiport serial boards, which includes models C102P, C102H, C102HI, and C102HIS. The C102HIS represents the top-tier configuration in this series, integrating both 2 kV optical isolation and 2 kV surge protection for maximum reliability in electrically noisy or high-voltage industrial environments. It uses a high-speed TI550C UART and a custom ASIC design to deliver robust, high-performance serial communication over long distances (up to 4000 ft).
2. Key Features
- Dual Independent RS-422/RS-485 Ports: Two fully independent asynchronous serial ports supporting both RS-422 and RS-485 standards.
- High-Speed Operation: Supports baud rates from 50 bps up to 921.6 Kbps using TI550C UARTs with on-chip hardware flow control.
- Optical Isolation and Surge Protection: Provides up to 2 kV isolation and 2 kV surge protection, ensuring safe operation in harsh industrial environments.
- Software-Configurable Hardware: No jumpers or DIP switches; all configuration (I/O address, IRQ, interrupt vector) is handled via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Custom ASIC Design: Reduces board size to half-length ISA form factor while maintaining full 16-bit AT bus compatibility.
- Flexible Communication Modes: Supports RS-422 point-to-point full-duplex and broadcasting, as well as RS-485 point-to-point and multidrop, in both half- and full-duplex modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, SCO UNIX/XENIX/OpenServer, OS/2, Linux, QNX, and FreeBSD.
- Driver and Utility Support: Includes Moxa-provided drivers for DOS, Windows 95, and Windows NT, plus diagnostic and programming tools (PComm for Windows, API-232 for DOS).
- High Reliability: Designed for industrial automation, data acquisition, and control systems requiring stable, long-distance serial communication.
3. Technical Specifications
- Bus Interface: ISA (EISA compatible), 16-bit AT bus architecture
- Number of Ports: 2 independent RS-422/RS-485 ports
- I/O Address Range: 0x0000 – 0xFFFF (software selectable)
- IRQ Options: 2, 3, 4, 5, 7, 10, 11, 12, 15 (software selectable)
- UART Type: 2 × TI550C high-speed UARTs with hardware flow control
- Baud Rate: 50 bps to 921.6 Kbps (high-speed mode)
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5, 2
- Parity: None, Even, Odd, Space, Mark
- Connectors: 2 × DB9 male connectors
- Signal Lines: TxDA, TxDB, RxDA, RxDB, RTSA, RTSB, CTSA, CTSB, GND
- Isolation Protection: Up to 2000 V (optical isolation)
- Surge Protection: Up to 2000 V (transient voltage suppression)
- Operating Temperature: 0°C to 55°C
- Power Requirements: +5 V DC, maximum 750 mA
- Dimensions: 157 mm × 105 mm (15.7 cm × 10.5 cm)
- Weight: Approximately 200 g (typical for half-size ISA board)
- Maximum Cable Length: 4000 ft (RS-422/485 standard)
- Maximum Data Rate: 10 Mbps (RS-422/485 physical layer capability)
4. Functionality
The C102HIS provides two asynchronous serial communication channels that can operate in RS-422 or RS-485 mode. Each port is independently configurable for full-duplex or half-duplex operation.
- RS-422 Mode: Supports point-to-point full-duplex and broadcasting configurations. Ideal for long-distance, high-speed communication between two devices or one-to-many broadcast systems.
- RS-485 Mode: Supports both point-to-point and multidrop configurations, with up to 32 drivers and 32 receivers on a single bus. Operates in half- or full-duplex modes, with selectable echo or non-echo operation.
Applications:
- Industrial automation and process control
- Data acquisition systems
- SCADA and telemetry networks
- Remote terminal communication
- Machine-to-machine (M2M) serial networking
- Industrial instrumentation and monitoring
Compatibility:
The board is compatible with standard COM port assignments (COM1–COM4) and can coexist with other serial devices. It supports both interrupt-driven and polling modes for data handling.
5. Components & Accessories
Included Items:
1. C102HIS dual-port RS-422/RS-485 board
2. User’s Manual (printed or digital)
3. Driver diskettes for DOS, Windows 95, and Windows NT (including Io-irq.exe, PComm, and API-232 utilities)
Optional Accessories:
- DB9-to-terminal block adapters for field wiring
- Shielded twisted-pair cables for RS-422/485 connections
- Surge-protected cabling for high-voltage environments
Connectors:
Each port uses a DB9 male connector with the following pin assignments:
1 – TxDA
2 – TxDB
3 – RxDB
4 – RxDA
5 – GND
6 – RTSA
7 – RTSB
8 – CTSB
9 – CTSA
6. Installation & Setup
Hardware Installation:
1. Power off the PC and insert the C102HIS into a free 16-bit ISA slot.
2. Ensure jumper JP1 is open (default). JP1 is only used to reset the Configuration Access Port (CAP) address to 0xA700 if forgotten.
3. Power on the PC and boot into DOS.
4. Run the configuration utility Io-irq.exe from the driver diskette to set I/O addresses, IRQs, and interrupt vectors.
5. Configuration data is stored in onboard EEPROM, eliminating the need for physical jumpers.
Default Factory Settings:
- I/O Address: 0x180 (Port 1), 0x188 (Port 2)
- IRQ: 10
- INT Vector: 0x1C0
- CAP Address: 0x180
Software Installation:
- Windows NT/95: Install via Setup95.exe or through Control Panel → Network → Adapters → “MOXA C102/C104/C168 Family Adapter.”
- DOS: Use API-232 driver package (DOSINST.EXE, SETUP.EXE, SER-DRV.EXE).
- UNIX/XENIX: Use built-in 2-port serial driver via `mkdev serial`.
Configuration Parameters:
- I/O Address and IRQ are software-selectable per port.
- Interrupt Vector can be enabled for improved performance.
- Tx/Rx Enable Modes: Always On, By Register, By RTS, or By /RTS.
7. Performance & Capabilities
- Speed: Up to 921.6 Kbps (high-speed mode).
- Throughput: Optimized via TI550C UARTs with 16-byte FIFO buffers and hardware flow control.
- Distance: Up to 4000 ft (1200 m) over twisted-pair cable.
- Signal Integrity: 2 kV isolation and surge protection prevent data loss due to electrical interference.
- Power Efficiency: Consumes up to 750 mA at +5 V DC.
- Multi-Board Support: Up to four C102-family boards can be installed in one system, provided sufficient IRQ and I/O resources.
- Driver Modes: Supports interrupt vector and polling modes; interrupt vector mode offers higher performance.
- Limitations: Requires ISA slot; not compatible with PCI-only systems.
8. Standards & Compliance
- Electrical Interface Standards: EIA RS-422, EIA RS-485
- Bus Interface: ISA (Industry Standard Architecture), EISA compatible
- Isolation & Surge Protection: 2 kV optical isolation and transient voltage suppression compliant with industrial safety standards
- Operating Systems Supported:
- DOS (API-232 driver)
- Windows 3.1, Windows 95, Windows NT (Moxa drivers)
- SCO UNIX/XENIX/OpenServer (standard driver)
- OS/2, Linux, QNX, FreeBSD (system-supported drivers)
- Regulatory Compliance: Designed for industrial EMC environments; conforms to general CE and FCC Class A requirements for industrial devices.
- Environmental Compliance: Operating temperature 0–55°C; suitable for standard industrial enclosures.
9. Additional Information
Warranty:
Standard Moxa limited hardware warranty (typically 3 years, depending on region). Covers defects in materials and workmanship under normal use.
Technical Support:
- Email: support@moxa.com.tw
- Website: [www.moxa.com](http://www.moxa.com) / [www.moxa.com.tw](http://www.moxa.com.tw)
- FTP Site: ftp.moxa.com or ftp.moxa.com.tw (User ID: ftp, Password: your_email_address) for driver and firmware updates.
Maintenance:
- Periodically inspect connectors and cabling for wear or corrosion.
- Ensure proper grounding and shielding in high-noise environments.
- Use Moxa diagnostic utilities (PComm Diagnostic, Data Scope) for port testing and troubleshooting.
Software Tools:
- Io-irq.exe: DOS-based configuration utility for setting I/O address, IRQ, and interrupt vector.
- PComm: Windows NT/95 serial communication library and diagnostic suite, including terminal emulator and port monitor.
- API-232: DOS communication library supporting C, Pascal, BASIC, and Assembly for custom application development.
- Data Scope: DOS utility for serial line monitoring, terminal emulation, and protocol-based file transfer (ASCII, XMODEM, YMODEM, ZMODEM, KERMIT).
Driver Updates:
Moxa provides continuous driver updates via its FTP and web services. Users can download the latest versions for Windows, DOS, and UNIX platforms to ensure compatibility with new operating systems.
Support Utilities:
- Diagnostic Utility: Tests IRQ, TxD/RxD, CTS/RTS, DTR/DSR, and DTR/DCD signals.
- Monitor Utility: Displays real-time port throughput and line status.
- Programming Libraries: Simplify development of serial communication applications using standard languages (C, Visual Basic, Delphi).
Troubleshooting Highlights:
- If the board is not detected, verify I/O address and IRQ settings, ensure JP1 is open, and check for slot or address conflicts.
- If communication fails, confirm correct wiring and matching RS-422/485 configuration.
- If CAP address is forgotten, short JP1 to force CAP to 0xA700, reconfigure using Io-irq.exe, then remove the jumper.
Summary
The Moxa C102HIS is a high-performance, industrial-grade dual-port RS-422/RS-485 serial communication board designed for reliable, long-distance data transmission in demanding environments. With its 2 kV optical isolation, 2 kV surge protection, and high-speed TI550C UARTs, it ensures robust operation even in electrically noisy conditions. The board’s software-configurable architecture, broad OS compatibility, and comprehensive driver and utility support make it an ideal solution for system integrators and engineers developing industrial automation, data acquisition, and control systems.
Its combination of hardware protection, flexible configuration, and cross-platform driver support positions the C102HIS as a versatile and durable communication interface for legacy ISA-based industrial computing platforms.
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C102.pdf
Manual
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