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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 for point-to-point or multidrop communication.
- High-Speed UARTs: Equipped with two TI550C UARTs providing hardware flow control and FIFO buffering to prevent data loss at high transmission speeds.
- Custom ASIC Design: Integrates multiple conventional ICs into a single ASIC, reducing board size to half-length and improving reliability.
- Software-Configurable Hardware: No jumpers or DIP switches required; all I/O addresses and IRQs are configured via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Flexible Communication Modes: Supports full-duplex and half-duplex operation, echo and non-echo modes, and master/slave configurations for multidrop networks.
- Wide Baud Rate Range: Operates from 50 bps to 921.6 kbps, with selectable normal and high-speed modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, Linux, QNX, SCO UNIX/XENIX/OpenServer, OS/2, and FreeBSD.
- Surge and Isolation Options: Surge and opto-isolation protection available in related models (C102HI, C102HIS).
- Compact ISA Interface: 16-bit AT bus (ISA/EISA compatible) design ensures compatibility with legacy and industrial PC systems.
- Diagnostic and Programming Tools: Bundled with Moxa’s PComm (Windows) and API-232 (DOS) libraries for application development, diagnostics, and monitoring.
- High-Speed UARTs: Equipped with two TI550C UARTs providing hardware flow control and FIFO buffering to prevent data loss at high transmission speeds.
- Custom ASIC Design: Integrates multiple conventional ICs into a single ASIC, reducing board size to half-length and improving reliability.
- Software-Configurable Hardware: No jumpers or DIP switches required; all I/O addresses and IRQs are configured via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Flexible Communication Modes: Supports full-duplex and half-duplex operation, echo and non-echo modes, and master/slave configurations for multidrop networks.
- Wide Baud Rate Range: Operates from 50 bps to 921.6 kbps, with selectable normal and high-speed modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, Linux, QNX, SCO UNIX/XENIX/OpenServer, OS/2, and FreeBSD.
- Surge and Isolation Options: Surge and opto-isolation protection available in related models (C102HI, C102HIS).
- Compact ISA Interface: 16-bit AT bus (ISA/EISA compatible) design ensures compatibility with legacy and industrial PC systems.
- Diagnostic and Programming Tools: Bundled with Moxa’s PComm (Windows) and API-232 (DOS) libraries for application development, diagnostics, and monitoring.
1. Product Overview
Product Name: C102H
Model: C102H
Series: C102 Family (C102P, C102H, C102HI, C102HIS)
Article Number: C102H
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa C102H is a high-performance, dual-port asynchronous serial communication board designed for industrial and embedded applications requiring RS-422 or RS-485 connectivity. It belongs to the C102 Family of universal RS-422/485 multiport serial boards, which are engineered with Moxa’s proprietary ASIC technology to deliver compact design, high reliability, and flexible configuration. The C102H model specifically features high-speed TI550C UARTs, supporting data rates up to 921.6 kbps, and is optimized for robust communication in industrial environments over long distances up to 4000 feet (approximately 1200 meters).
2. Key Features
- Dual Independent RS-422/RS-485 Ports: Two fully independent asynchronous serial ports supporting both RS-422 and RS-485 standards for point-to-point or multidrop communication.
- High-Speed UARTs: Equipped with two TI550C UARTs providing hardware flow control and FIFO buffering to prevent data loss at high transmission speeds.
- Custom ASIC Design: Integrates multiple conventional ICs into a single ASIC, reducing board size to half-length and improving reliability.
- Software-Configurable Hardware: No jumpers or DIP switches required; all I/O addresses and IRQs are configured via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Flexible Communication Modes: Supports full-duplex and half-duplex operation, echo and non-echo modes, and master/slave configurations for multidrop networks.
- Wide Baud Rate Range: Operates from 50 bps to 921.6 kbps, with selectable normal and high-speed modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, Linux, QNX, SCO UNIX/XENIX/OpenServer, OS/2, and FreeBSD.
- Surge and Isolation Options: Surge and opto-isolation protection available in related models (C102HI, C102HIS).
- Compact ISA Interface: 16-bit AT bus (ISA/EISA compatible) design ensures compatibility with legacy and industrial PC systems.
- Diagnostic and Programming Tools: Bundled with Moxa’s PComm (Windows) and API-232 (DOS) libraries for application development, diagnostics, and monitoring.
3. Technical Specifications
- Bus Interface: ISA (EISA compatible, 16-bit AT bus)
- Number of Ports: 2 independent RS-422/RS-485 serial ports
- I/O Address Range: 0x0000 – 0xFFFF (software selectable)
- IRQ Options: 2, 3, 4, 5, 7, 10, 11, 12, 15 (individually assignable per port)
- UART Type: 2 × TI550C (16550-compatible high-speed UARTs)
- Baud Rate: 50 bps to 921.6 kbps (C102H, C102HI, C102HIS)
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5, 2
- Parity: None, Even, Odd, Space, Mark
- Connectors: 2 × DB9 male (D-type 9-pin)
- Signal Lines: TxDA, TxDB, RxDA, RxDB, RTSA, RTSB, CTSA, CTSB, GND
- Power Requirement: +5V DC, 200 mA maximum
- Dimensions: 15.7 cm × 8.3 cm (6.18 in × 3.27 in)
- Operating Temperature: 0°C to 55°C
- Communication Distance: Up to 4000 ft (approx. 1200 m)
- Surge Protection: Up to 2000V (C102HIS)
- Opto-Isolation: Up to 2000V (C102HI, C102HIS)
- Maximum Data Rate: 10 Mbps (RS-422/485 standard capability)
- Weight: Approximately 150 g (board only)
4. Functionality
The C102H provides two asynchronous serial communication channels that can be configured for RS-422 or RS-485 operation. Each port operates independently, allowing simultaneous communication with multiple devices or networks. The board supports both point-to-point and multidrop configurations, enabling flexible deployment in industrial automation, data acquisition, and control systems.
RS-422 Mode:
- Full-duplex differential signaling for long-distance, noise-immune communication.
- Supports up to 10 receivers per driver for broadcasting applications.
RS-485 Mode:
- Supports up to 32 drivers and 32 receivers on a single bus.
- Configurable for half-duplex or full-duplex operation.
- Echo and non-echo modes selectable via software.
- Master/slave communication supported for multidrop networks.
Compatibility:
The C102H is compatible with standard COM port assignments (COM1–COM4) and can coexist with other serial devices. It supports both interrupt-driven and polling modes, with optional interrupt vector configuration for improved performance.
Applications:
- Industrial automation and process control
- SCADA and telemetry systems
- Data acquisition and monitoring
- Remote terminal communication
- Machine-to-machine (M2M) communication
- Embedded control systems requiring reliable serial connectivity
5. Components & Accessories
Package Contents:
1. C102H dual-port RS-422/RS-485 board
2. User’s Manual
3. Driver diskettes for DOS, Windows 95, and Windows NT
Optional Accessories:
- RS-422/485 compatible cables and terminal blocks
- Surge and isolation protection modules (integrated in C102HI/C102HIS models)
- Software utilities: PComm (Windows), API-232 (DOS)
- Diagnostic tools: Mxtty, Data Scope
Connectors:
- Two DB9 male connectors 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 C102H into an available 16-bit ISA slot.
2. Ensure the JP1 jumper is open (default).
3. Power on the system and boot into DOS.
4. Run the configuration utility Io-irq.exe from the driver diskette to assign I/O addresses, IRQs, and interrupt vectors.
5. Configuration data is stored in onboard EEPROM, eliminating the need for jumpers or switches.
Default Factory Settings:
- I/O Address: 0x180 (Port 1), 0x188 (Port 2)
- IRQ: 10
- INT Vector: 0x1C0
- CAP (Configuration Access Port): 0x180
If the CAP address is unknown, shorting JP1 forces it to 0xA700 for recovery.
Software Installation:
- Windows NT/95: Install via Setup95.exe or through Control Panel → Network → Adapters → Have Disk.
- DOS: Use DOSINST.EXE to install API-232 drivers and libraries.
- UNIX/XENIX: Use `mkdev serial` to configure as a 2-port card (Arnet-compatible).
Configuration Options:
- Sequential or non-sequential port mapping
- Independent COM number assignment
- FIFO trigger level (1, 4, 8, or 14 bytes)
- Interrupt vector enable/disable
- Tx/Rx enable modes: Always On, By Register, By RTS
7. Performance & Capabilities
- Data Rate: 50 bps to 921.6 kbps (C102H high-speed mode)
- Transmission Distance: Up to 4000 ft (RS-422/485 standard)
- Bus Architecture: 16-bit ISA, supporting multiple boards (up to 4 simultaneously)
- Communication Modes:
- RS-422: Point-to-point full-duplex, broadcasting
- RS-485: Point-to-point or multidrop, half/full-duplex, echo/non-echo
- Flow Control: Hardware (RTS/CTS) and software (XON/XOFF) supported
- FIFO Buffer: 16-byte transmit/receive FIFO per UART
- Power Efficiency: Low power consumption (200 mA @ +5V)
- Reliability: ASIC integration reduces component count and failure points
- Limitations: Requires ISA slot; not suitable for PCI-only systems
8. Standards & Compliance
- Electrical Interface Standards: EIA RS-422, RS-485
- Bus Compatibility: ISA/EISA 16-bit AT bus
- UART Compatibility: 16550/16450 standard
- Operating Systems: DOS, Windows 3.1, Windows 95, Windows NT, Linux, QNX, SCO UNIX/XENIX/OpenServer, OS/2, FreeBSD
- Driver Compliance: Moxa-provided drivers for DOS, Windows 95, Windows NT; standard OS drivers for UNIX and Linux
- Surge/Isolation Ratings: Up to 2000V (model dependent)
- Environmental Compliance: Operating temperature 0–55°C; designed for industrial environments
- Regulatory: Designed to meet industrial EMC and safety standards (specific certifications depend on model and region)
9. Additional Information
Warranty & Support:
Moxa provides standard warranty coverage for manufacturing defects and offers technical support through multiple channels:
- Email: support@moxa.com.tw
- FTP: ftp.moxa.com / ftp.moxa.com.tw (for driver updates)
- Website: www.moxa.com / www.moxa.com.tw
Maintenance:
- Periodically verify cable integrity and connector tightness.
- Use diagnostic utilities (PComm Monitor, Data Scope) to test communication ports.
- Firmware and driver updates available via Moxa FTP site.
Software Tools:
- PComm (Windows): Provides serial communication library, diagnostic, and monitoring utilities.
- API-232 (DOS): Offers programming libraries for C, Pascal, BASIC, Assembly, and Clipper.
- Data Scope: Terminal emulation and data monitoring utility for DOS.
Programming Support:
- Supports direct register access and RTS control for Tx/Rx enable.
- Example code provided for Visual C++, Visual Basic, Delphi, Turbo C, and others.
- Supports standard file transfer protocols (ASCII, XMODEM, YMODEM, ZMODEM, KERMIT).
Troubleshooting Highlights:
- Board Not Found: Check I/O address conflicts, slot integrity, and JP1 jumper.
- No Data Transfer: Verify cable wiring, IRQ settings, and flow control configuration.
- Io-irq Access Failure: Use JP1 jumper to force CAP address to 0xA700.
- Configuration Mismatch: Ensure software and hardware settings match.
System Integration Notes:
- Supports up to four C102-family boards per system.
- Each port can be independently configured for address, IRQ, and COM mapping.
- Compatible with standard serial communication APIs and terminal software.
Summary
The Moxa C102H is a robust, high-speed dual-port RS-422/485 serial communication board designed for industrial and embedded systems requiring reliable, long-distance, and noise-immune data transmission. Its software-configurable architecture, high-speed TI550C UARTs, and comprehensive driver support make it ideal for automation, control, and data acquisition applications. With flexible configuration, broad OS compatibility, and Moxa’s proven reliability, the C102H remains a versatile solution for legacy ISA-based industrial communication systems.
Product Name: C102H
Model: C102H
Series: C102 Family (C102P, C102H, C102HI, C102HIS)
Article Number: C102H
Manufacturer: Moxa Technologies Co., Ltd.
The Moxa C102H is a high-performance, dual-port asynchronous serial communication board designed for industrial and embedded applications requiring RS-422 or RS-485 connectivity. It belongs to the C102 Family of universal RS-422/485 multiport serial boards, which are engineered with Moxa’s proprietary ASIC technology to deliver compact design, high reliability, and flexible configuration. The C102H model specifically features high-speed TI550C UARTs, supporting data rates up to 921.6 kbps, and is optimized for robust communication in industrial environments over long distances up to 4000 feet (approximately 1200 meters).
2. Key Features
- Dual Independent RS-422/RS-485 Ports: Two fully independent asynchronous serial ports supporting both RS-422 and RS-485 standards for point-to-point or multidrop communication.
- High-Speed UARTs: Equipped with two TI550C UARTs providing hardware flow control and FIFO buffering to prevent data loss at high transmission speeds.
- Custom ASIC Design: Integrates multiple conventional ICs into a single ASIC, reducing board size to half-length and improving reliability.
- Software-Configurable Hardware: No jumpers or DIP switches required; all I/O addresses and IRQs are configured via software utility (Io-irq.exe) and stored in onboard EEPROM.
- Flexible Communication Modes: Supports full-duplex and half-duplex operation, echo and non-echo modes, and master/slave configurations for multidrop networks.
- Wide Baud Rate Range: Operates from 50 bps to 921.6 kbps, with selectable normal and high-speed modes.
- Comprehensive OS Support: Compatible with DOS, Windows 3.1, Windows 95, Windows NT, Linux, QNX, SCO UNIX/XENIX/OpenServer, OS/2, and FreeBSD.
- Surge and Isolation Options: Surge and opto-isolation protection available in related models (C102HI, C102HIS).
- Compact ISA Interface: 16-bit AT bus (ISA/EISA compatible) design ensures compatibility with legacy and industrial PC systems.
- Diagnostic and Programming Tools: Bundled with Moxa’s PComm (Windows) and API-232 (DOS) libraries for application development, diagnostics, and monitoring.
3. Technical Specifications
- Bus Interface: ISA (EISA compatible, 16-bit AT bus)
- Number of Ports: 2 independent RS-422/RS-485 serial ports
- I/O Address Range: 0x0000 – 0xFFFF (software selectable)
- IRQ Options: 2, 3, 4, 5, 7, 10, 11, 12, 15 (individually assignable per port)
- UART Type: 2 × TI550C (16550-compatible high-speed UARTs)
- Baud Rate: 50 bps to 921.6 kbps (C102H, C102HI, C102HIS)
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5, 2
- Parity: None, Even, Odd, Space, Mark
- Connectors: 2 × DB9 male (D-type 9-pin)
- Signal Lines: TxDA, TxDB, RxDA, RxDB, RTSA, RTSB, CTSA, CTSB, GND
- Power Requirement: +5V DC, 200 mA maximum
- Dimensions: 15.7 cm × 8.3 cm (6.18 in × 3.27 in)
- Operating Temperature: 0°C to 55°C
- Communication Distance: Up to 4000 ft (approx. 1200 m)
- Surge Protection: Up to 2000V (C102HIS)
- Opto-Isolation: Up to 2000V (C102HI, C102HIS)
- Maximum Data Rate: 10 Mbps (RS-422/485 standard capability)
- Weight: Approximately 150 g (board only)
4. Functionality
The C102H provides two asynchronous serial communication channels that can be configured for RS-422 or RS-485 operation. Each port operates independently, allowing simultaneous communication with multiple devices or networks. The board supports both point-to-point and multidrop configurations, enabling flexible deployment in industrial automation, data acquisition, and control systems.
RS-422 Mode:
- Full-duplex differential signaling for long-distance, noise-immune communication.
- Supports up to 10 receivers per driver for broadcasting applications.
RS-485 Mode:
- Supports up to 32 drivers and 32 receivers on a single bus.
- Configurable for half-duplex or full-duplex operation.
- Echo and non-echo modes selectable via software.
- Master/slave communication supported for multidrop networks.
Compatibility:
The C102H is compatible with standard COM port assignments (COM1–COM4) and can coexist with other serial devices. It supports both interrupt-driven and polling modes, with optional interrupt vector configuration for improved performance.
Applications:
- Industrial automation and process control
- SCADA and telemetry systems
- Data acquisition and monitoring
- Remote terminal communication
- Machine-to-machine (M2M) communication
- Embedded control systems requiring reliable serial connectivity
5. Components & Accessories
Package Contents:
1. C102H dual-port RS-422/RS-485 board
2. User’s Manual
3. Driver diskettes for DOS, Windows 95, and Windows NT
Optional Accessories:
- RS-422/485 compatible cables and terminal blocks
- Surge and isolation protection modules (integrated in C102HI/C102HIS models)
- Software utilities: PComm (Windows), API-232 (DOS)
- Diagnostic tools: Mxtty, Data Scope
Connectors:
- Two DB9 male connectors 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 C102H into an available 16-bit ISA slot.
2. Ensure the JP1 jumper is open (default).
3. Power on the system and boot into DOS.
4. Run the configuration utility Io-irq.exe from the driver diskette to assign I/O addresses, IRQs, and interrupt vectors.
5. Configuration data is stored in onboard EEPROM, eliminating the need for jumpers or switches.
Default Factory Settings:
- I/O Address: 0x180 (Port 1), 0x188 (Port 2)
- IRQ: 10
- INT Vector: 0x1C0
- CAP (Configuration Access Port): 0x180
If the CAP address is unknown, shorting JP1 forces it to 0xA700 for recovery.
Software Installation:
- Windows NT/95: Install via Setup95.exe or through Control Panel → Network → Adapters → Have Disk.
- DOS: Use DOSINST.EXE to install API-232 drivers and libraries.
- UNIX/XENIX: Use `mkdev serial` to configure as a 2-port card (Arnet-compatible).
Configuration Options:
- Sequential or non-sequential port mapping
- Independent COM number assignment
- FIFO trigger level (1, 4, 8, or 14 bytes)
- Interrupt vector enable/disable
- Tx/Rx enable modes: Always On, By Register, By RTS
7. Performance & Capabilities
- Data Rate: 50 bps to 921.6 kbps (C102H high-speed mode)
- Transmission Distance: Up to 4000 ft (RS-422/485 standard)
- Bus Architecture: 16-bit ISA, supporting multiple boards (up to 4 simultaneously)
- Communication Modes:
- RS-422: Point-to-point full-duplex, broadcasting
- RS-485: Point-to-point or multidrop, half/full-duplex, echo/non-echo
- Flow Control: Hardware (RTS/CTS) and software (XON/XOFF) supported
- FIFO Buffer: 16-byte transmit/receive FIFO per UART
- Power Efficiency: Low power consumption (200 mA @ +5V)
- Reliability: ASIC integration reduces component count and failure points
- Limitations: Requires ISA slot; not suitable for PCI-only systems
8. Standards & Compliance
- Electrical Interface Standards: EIA RS-422, RS-485
- Bus Compatibility: ISA/EISA 16-bit AT bus
- UART Compatibility: 16550/16450 standard
- Operating Systems: DOS, Windows 3.1, Windows 95, Windows NT, Linux, QNX, SCO UNIX/XENIX/OpenServer, OS/2, FreeBSD
- Driver Compliance: Moxa-provided drivers for DOS, Windows 95, Windows NT; standard OS drivers for UNIX and Linux
- Surge/Isolation Ratings: Up to 2000V (model dependent)
- Environmental Compliance: Operating temperature 0–55°C; designed for industrial environments
- Regulatory: Designed to meet industrial EMC and safety standards (specific certifications depend on model and region)
9. Additional Information
Warranty & Support:
Moxa provides standard warranty coverage for manufacturing defects and offers technical support through multiple channels:
- Email: support@moxa.com.tw
- FTP: ftp.moxa.com / ftp.moxa.com.tw (for driver updates)
- Website: www.moxa.com / www.moxa.com.tw
Maintenance:
- Periodically verify cable integrity and connector tightness.
- Use diagnostic utilities (PComm Monitor, Data Scope) to test communication ports.
- Firmware and driver updates available via Moxa FTP site.
Software Tools:
- PComm (Windows): Provides serial communication library, diagnostic, and monitoring utilities.
- API-232 (DOS): Offers programming libraries for C, Pascal, BASIC, Assembly, and Clipper.
- Data Scope: Terminal emulation and data monitoring utility for DOS.
Programming Support:
- Supports direct register access and RTS control for Tx/Rx enable.
- Example code provided for Visual C++, Visual Basic, Delphi, Turbo C, and others.
- Supports standard file transfer protocols (ASCII, XMODEM, YMODEM, ZMODEM, KERMIT).
Troubleshooting Highlights:
- Board Not Found: Check I/O address conflicts, slot integrity, and JP1 jumper.
- No Data Transfer: Verify cable wiring, IRQ settings, and flow control configuration.
- Io-irq Access Failure: Use JP1 jumper to force CAP address to 0xA700.
- Configuration Mismatch: Ensure software and hardware settings match.
System Integration Notes:
- Supports up to four C102-family boards per system.
- Each port can be independently configured for address, IRQ, and COM mapping.
- Compatible with standard serial communication APIs and terminal software.
Summary
The Moxa C102H is a robust, high-speed dual-port RS-422/485 serial communication board designed for industrial and embedded systems requiring reliable, long-distance, and noise-immune data transmission. Its software-configurable architecture, high-speed TI550C UARTs, and comprehensive driver support make it ideal for automation, control, and data acquisition applications. With flexible configuration, broad OS compatibility, and Moxa’s proven reliability, the C102H remains a versatile solution for legacy ISA-based industrial communication systems.
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C102.pdf
Manual
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