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- Eight Independent RS‑232 Ports: Each port operates independently with its own I/O address and IRQ configuration.
- High‑Speed Communication: Supports baud rates up to 921.6 kbit/s, enabling high‑throughput serial data transfer.
- 16550 UART Compatibility: Each port uses a 16550‑compatible UART with 16‑byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Custom ASIC Design: Replaces multiple discrete ICs, reducing board size to half‑length and improving reliability.
- Software‑Configurable Parameters: No jumpers or DIP switches required; configuration is stored in on‑board EEPROM and managed via MOXA’s IO‑IRQ utility.
- Flexible Interrupt and I/O Addressing: Supports IRQs 2–5, 7, 10–12, and 15; base I/O addresses are software‑selectable.
- Hardware Flow Control: On‑chip RTS/CTS flow control ensures no data loss during high‑speed transmission.
- Comprehensive OS Support: Drivers available for Windows NT/95/98, DOS, Linux, SCO UNIX/OpenServer, QNX, and FreeBSD.
- Diagnostic and Programming Tools: Bundled with MOXA’s PComm (Windows) and API‑232 (DOS) libraries for application development and port diagnostics.
- Compact Half‑Size ISA Form Factor: Fits standard PC/AT ISA slots with minimal space requirements.
- Industrial‑Grade Reliability: Designed for continuous operation in automation, POS, and communication systems.
- High‑Speed Communication: Supports baud rates up to 921.6 kbit/s, enabling high‑throughput serial data transfer.
- 16550 UART Compatibility: Each port uses a 16550‑compatible UART with 16‑byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Custom ASIC Design: Replaces multiple discrete ICs, reducing board size to half‑length and improving reliability.
- Software‑Configurable Parameters: No jumpers or DIP switches required; configuration is stored in on‑board EEPROM and managed via MOXA’s IO‑IRQ utility.
- Flexible Interrupt and I/O Addressing: Supports IRQs 2–5, 7, 10–12, and 15; base I/O addresses are software‑selectable.
- Hardware Flow Control: On‑chip RTS/CTS flow control ensures no data loss during high‑speed transmission.
- Comprehensive OS Support: Drivers available for Windows NT/95/98, DOS, Linux, SCO UNIX/OpenServer, QNX, and FreeBSD.
- Diagnostic and Programming Tools: Bundled with MOXA’s PComm (Windows) and API‑232 (DOS) libraries for application development and port diagnostics.
- Compact Half‑Size ISA Form Factor: Fits standard PC/AT ISA slots with minimal space requirements.
- Industrial‑Grade Reliability: Designed for continuous operation in automation, POS, and communication systems.
Comprehensive Product Summary – MOXA C168H 8‑Port RS‑232 High‑Speed ISA Card
### 1. Product Overview
Product Name: MOXA C168H
Model: C168H
Series: Smartio C168 Series (ISA Bus)
Article Number: C168H
Manufacturer: Moxa Technologies Co., Ltd.
Manufacturer Contact:
Tel: +886‑2‑8665‑6373 Fax: +886‑2‑8665‑6372
Website: [www.moxa.com](https://www.moxa.com) Email: support@moxa.com.tw
Product Description:
The MOXA C168H is an 8‑port RS‑232 asynchronous serial communication board designed for PC/AT and compatible systems using the ISA bus architecture. It provides high‑speed serial connectivity up to 921.6 kbit/s per port and integrates 16550 UARTs with on‑chip hardware flow control. The board is engineered with a custom ASIC design for compactness and reliability, offering software‑selectable base addresses and interrupt configurations. It connects via a DB62 female connector and supports a wide range of operating systems including Windows NT, Windows 95/98, DOS, Linux, and UNIX variants.
### 2. Key Features
- Eight Independent RS‑232 Ports: Each port operates independently with its own I/O address and IRQ configuration.
- High‑Speed Communication: Supports baud rates up to 921.6 kbit/s, enabling high‑throughput serial data transfer.
- 16550 UART Compatibility: Each port uses a 16550‑compatible UART with 16‑byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Custom ASIC Design: Replaces multiple discrete ICs, reducing board size to half‑length and improving reliability.
- Software‑Configurable Parameters: No jumpers or DIP switches required; configuration is stored in on‑board EEPROM and managed via MOXA’s IO‑IRQ utility.
- Flexible Interrupt and I/O Addressing: Supports IRQs 2–5, 7, 10–12, and 15; base I/O addresses are software‑selectable.
- Hardware Flow Control: On‑chip RTS/CTS flow control ensures no data loss during high‑speed transmission.
- Comprehensive OS Support: Drivers available for Windows NT/95/98, DOS, Linux, SCO UNIX/OpenServer, QNX, and FreeBSD.
- Diagnostic and Programming Tools: Bundled with MOXA’s PComm (Windows) and API‑232 (DOS) libraries for application development and port diagnostics.
- Compact Half‑Size ISA Form Factor: Fits standard PC/AT ISA slots with minimal space requirements.
- Industrial‑Grade Reliability: Designed for continuous operation in automation, POS, and communication systems.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|------------------|
| Bus Interface | ISA (EISA compatible, 16‑bit architecture) |
| Number of Ports | 8 asynchronous serial ports |
| Communication Standard | RS‑232 (with optional RS‑422/485 via connection boxes) |
| UART Type | 8 × 16550 or compatible |
| Baud Rate | 50 bps – 921.6 kbps (C168H); 50 bps – 115.2 kbps (C168P) |
| Data Bits | 5, 6, 7, 8 |
| Stop Bits | 1, 1.5, 2 |
| Parity | None, Even, Odd, Space, Mark |
| Flow Control | RTS/CTS hardware flow control |
| IRQ Options | 2, 3, 4, 5, 7, 10, 11, 12, 15 |
| I/O Address Range | 0x0000 – 0xFFFF (software‑selectable) |
| Interrupt Vector | Configurable (default 0x1C0) |
| Connectors | DB62 female on board; connects to Opt8x connection boxes or octopus cables |
| Dimensions | 123 mm × 100 mm (C168H); 157 mm × 93 mm (C168P) |
| Power Requirements | +5 V @ 180 mA max, +12 V @ 110 mA max, –12 V @ 160 mA max |
| Operating Temperature | 0 °C – 55 °C |
| Signal Lines (RS‑232) | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND |
| Signal Lines (RS‑422) | TxD±, RxD±, GND (Opt8F/J/Z) |
| Signal Lines (RS‑485) | Data±, GND (Opt8J) |
| Connector Pin Count | 62‑pin D‑sub female (DB62) |
| Board Type | Half‑size ISA card |
| Max Cable Length (RS‑422) | Up to 4000 ft (1200 m) |
| Isolation (Opt8F) | 500 V DC isolation protection |
| Supported OS | Windows NT/95/98, DOS, Linux, SCO UNIX/OpenServer, QNX, FreeBSD |
### 4. Functionality
The C168H functions as a multi‑port asynchronous serial communication interface for PCs. Each of its eight ports can connect to RS‑232 devices such as modems, terminals, barcode scanners, printers, or industrial controllers. The board’s ASIC architecture and 16550 UARTs enable high‑speed, low‑latency data transfer with minimal CPU load.
Use Cases and Applications:
- Industrial automation and process control systems
- Point‑of‑Sale (POS) terminals and kiosks
- Telecommunication and remote access servers
- Data acquisition and instrumentation
- Multi‑user or multi‑terminal environments
- Office automation and serial device networking
Compatibility:
- Fully compatible with PC/AT ISA bus systems
- Works with standard serial communication software via COM ports
- Supports MOXA’s PComm and API‑232 libraries for custom application development
- Compatible with Opt8x connection boxes for RS‑232/422/485 interfacing
### 5. Components & Accessories
Included Items:
- C168H 8‑port RS‑232 ISA board
- Device driver diskettes (Windows NT/95/98, DOS)
- PComm Lite software diskette
- User’s Manual
Optional Connection Accessories (Opt8x Series):
- Opt8A: RS‑232 connection box, 8 × DB25 female ports
- Opt8B: RS‑232 connection box, 8 × DB25 male ports
- Opt8S: RS‑232 connection box, 8 × DB25 female ports with surge protection
- Opt8C: RS‑232 octopus cable, 8 × DB25 male connectors (1 m)
- Opt8D: RS‑232 octopus cable, 8 × DB9 male connectors (1 m)
- Opt8F: RS‑422 connection box, 8 × DB25 female ports with 500 V isolation
- Opt8Z: RS‑422 connection box, 8 × DB25 female ports (non‑isolated)
- Opt8J: RS‑422/485 connection box, 8 × DB25 female ports with DIP switches for mode selection
Cabling:
- Standard 1.5 m DB62‑to‑DB62 cable between board and connection box
- Optional 110 V/220 V power adapter for Opt8F/J/Z boxes
### 6. Installation & Setup
Hardware Installation:
1. Power off the PC and insert the C168H into an available 16‑bit ISA slot.
2. Connect the DB62 cable to the appropriate Opt8x connection box.
3. Configure I/O address and IRQ using MOXA’s IO‑IRQ.EXE utility under DOS, or use Quick Installation (JP1 shorted) for automatic configuration under Windows NT/95/98.
4. Restart the system to apply configuration changes.
Software Installation:
- Windows NT: Install via Control Panel → Network → Adapters → Add → Have Disk. Configure board type, I/O address, IRQ, and COM port mapping.
- Windows 95/98: Run Setup95.exe from driver diskette; configure ports and COM numbers in the Smartio/Industio Configuration Panel.
- DOS: Run DOSINST.EXE to install API‑232 drivers; configure using SETUP.EXE and load driver SER‑DRV.EXE.
Configuration Parameters:
- I/O Address (default): 0x180–0x1B8 (ports 1–8)
- IRQ (default): 10
- Interrupt Vector (default): 0x1C0
- CAP (Configuration Access Port): identical to first port’s base address (default 0x180; forced 0xA700 if JP1 shorted)
Mounting Options:
Standard ISA slot installation; external connection via DB62 cable to rack‑mount or desktop connection boxes.
### 7. Performance & Capabilities
- Maximum Baud Rate: 921.6 kbps per port (C168H)
- FIFO Buffers: 16‑byte transmit and receive FIFOs per UART
- Throughput: Optimized for multi‑threaded, multi‑process environments under Windows NT/95/98
- Latency: Low interrupt latency due to ASIC integration and interrupt vectoring
- Capacity: Up to four C168H boards (32 ports) per system
- Efficiency: Hardware flow control and FIFO buffering minimize CPU utilization
- Limitations: RS‑232 signal levels limit cable length (~15 m typical); for longer distances use RS‑422/485 options (Opt8F/J/Z)
### 8. Standards & Compliance
- Electrical Interface Standards:
- RS‑232 (EIA/TIA‑232‑E)
- RS‑422 (EIA/TIA‑422‑B)
- RS‑485 (EIA/TIA‑485‑A)
- Bus Compatibility: ISA and EISA compliant
- Operating System Compliance:
- Windows NT/95/98 (Win32 COMM API)
- DOS (API‑232)
- Linux, SCO UNIX/OpenServer, QNX, FreeBSD (native or MOXA‑supplied drivers)
- Safety & Reliability:
- Isolation protection (Opt8F) up to 500 V DC
- Surge protection (Opt8S) for RS‑232 lines
- Environmental: Operating temperature 0 – 55 °C; designed for industrial environments
- Regulatory: Meets general PC/AT hardware standards; conforms to MOXA internal quality and reliability testing
### 9. Additional Information
Warranty & Support:
MOXA provides standard warranty coverage for manufacturing defects. Technical support, driver updates, and documentation are available through MOXA Internet Services:
- Email: support@moxa.com.tw
- FTP: ftp.moxa.com / ftp.moxa.com.tw (user ID: ftp; password: your email address)
- Web: www.moxa.com
Maintenance:
- Periodically check cable connections and ensure proper grounding.
- Use MOXA diagnostic utilities (PComm Diagnostic, API‑232 Diagnose) to verify port functionality.
- Firmware and driver updates can be downloaded from MOXA’s FTP site.
Software Tools:
- PComm (Windows): Serial communication library and utilities including terminal emulator, diagnostic, and monitor tools.
- API‑232 (DOS): Serial programming library supporting C, Pascal, BASIC, Assembly, and Clipper.
- Utilities: IO‑IRQ.EXE (hardware configuration), SETUP.EXE (DOS driver setup), SER‑DRV.EXE (driver loader), SCOPE.EXE (data scope), DIAGNOSE.EXE (hardware test).
Troubleshooting Highlights:
- If board not detected, verify CAP address and IRQ conflicts.
- Use JP1 jumper to reset CAP to 0xA700 for recovery.
- Ensure correct driver version and matching hardware configuration.
- For data errors, check cable wiring and flow control settings.
Return & RMA Procedure:
Customers must provide proof of purchase, complete a Problem Report Form, and obtain an RMA number before returning products. Units should be packed in anti‑static packaging and shipped prepaid to the authorized dealer.
### Summary
The MOXA C168H is a robust, high‑performance 8‑port RS‑232 ISA communication board engineered for industrial and commercial serial networking applications. Its combination of high‑speed 921.6 kbps operation, 16550 UART architecture, and software‑configurable design makes it ideal for system integrators and OEMs requiring reliable multi‑port serial connectivity. With comprehensive driver support, diagnostic utilities, and flexible connection options (RS‑232/422/485), the C168H delivers proven reliability and scalability for automation, data acquisition, and communication systems.
### 1. Product Overview
Product Name: MOXA C168H
Model: C168H
Series: Smartio C168 Series (ISA Bus)
Article Number: C168H
Manufacturer: Moxa Technologies Co., Ltd.
Manufacturer Contact:
Tel: +886‑2‑8665‑6373 Fax: +886‑2‑8665‑6372
Website: [www.moxa.com](https://www.moxa.com) Email: support@moxa.com.tw
Product Description:
The MOXA C168H is an 8‑port RS‑232 asynchronous serial communication board designed for PC/AT and compatible systems using the ISA bus architecture. It provides high‑speed serial connectivity up to 921.6 kbit/s per port and integrates 16550 UARTs with on‑chip hardware flow control. The board is engineered with a custom ASIC design for compactness and reliability, offering software‑selectable base addresses and interrupt configurations. It connects via a DB62 female connector and supports a wide range of operating systems including Windows NT, Windows 95/98, DOS, Linux, and UNIX variants.
### 2. Key Features
- Eight Independent RS‑232 Ports: Each port operates independently with its own I/O address and IRQ configuration.
- High‑Speed Communication: Supports baud rates up to 921.6 kbit/s, enabling high‑throughput serial data transfer.
- 16550 UART Compatibility: Each port uses a 16550‑compatible UART with 16‑byte FIFO buffers for efficient data handling and reduced CPU overhead.
- Custom ASIC Design: Replaces multiple discrete ICs, reducing board size to half‑length and improving reliability.
- Software‑Configurable Parameters: No jumpers or DIP switches required; configuration is stored in on‑board EEPROM and managed via MOXA’s IO‑IRQ utility.
- Flexible Interrupt and I/O Addressing: Supports IRQs 2–5, 7, 10–12, and 15; base I/O addresses are software‑selectable.
- Hardware Flow Control: On‑chip RTS/CTS flow control ensures no data loss during high‑speed transmission.
- Comprehensive OS Support: Drivers available for Windows NT/95/98, DOS, Linux, SCO UNIX/OpenServer, QNX, and FreeBSD.
- Diagnostic and Programming Tools: Bundled with MOXA’s PComm (Windows) and API‑232 (DOS) libraries for application development and port diagnostics.
- Compact Half‑Size ISA Form Factor: Fits standard PC/AT ISA slots with minimal space requirements.
- Industrial‑Grade Reliability: Designed for continuous operation in automation, POS, and communication systems.
### 3. Technical Specifications
| Parameter | Specification |
|----------------|------------------|
| Bus Interface | ISA (EISA compatible, 16‑bit architecture) |
| Number of Ports | 8 asynchronous serial ports |
| Communication Standard | RS‑232 (with optional RS‑422/485 via connection boxes) |
| UART Type | 8 × 16550 or compatible |
| Baud Rate | 50 bps – 921.6 kbps (C168H); 50 bps – 115.2 kbps (C168P) |
| Data Bits | 5, 6, 7, 8 |
| Stop Bits | 1, 1.5, 2 |
| Parity | None, Even, Odd, Space, Mark |
| Flow Control | RTS/CTS hardware flow control |
| IRQ Options | 2, 3, 4, 5, 7, 10, 11, 12, 15 |
| I/O Address Range | 0x0000 – 0xFFFF (software‑selectable) |
| Interrupt Vector | Configurable (default 0x1C0) |
| Connectors | DB62 female on board; connects to Opt8x connection boxes or octopus cables |
| Dimensions | 123 mm × 100 mm (C168H); 157 mm × 93 mm (C168P) |
| Power Requirements | +5 V @ 180 mA max, +12 V @ 110 mA max, –12 V @ 160 mA max |
| Operating Temperature | 0 °C – 55 °C |
| Signal Lines (RS‑232) | TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND |
| Signal Lines (RS‑422) | TxD±, RxD±, GND (Opt8F/J/Z) |
| Signal Lines (RS‑485) | Data±, GND (Opt8J) |
| Connector Pin Count | 62‑pin D‑sub female (DB62) |
| Board Type | Half‑size ISA card |
| Max Cable Length (RS‑422) | Up to 4000 ft (1200 m) |
| Isolation (Opt8F) | 500 V DC isolation protection |
| Supported OS | Windows NT/95/98, DOS, Linux, SCO UNIX/OpenServer, QNX, FreeBSD |
### 4. Functionality
The C168H functions as a multi‑port asynchronous serial communication interface for PCs. Each of its eight ports can connect to RS‑232 devices such as modems, terminals, barcode scanners, printers, or industrial controllers. The board’s ASIC architecture and 16550 UARTs enable high‑speed, low‑latency data transfer with minimal CPU load.
Use Cases and Applications:
- Industrial automation and process control systems
- Point‑of‑Sale (POS) terminals and kiosks
- Telecommunication and remote access servers
- Data acquisition and instrumentation
- Multi‑user or multi‑terminal environments
- Office automation and serial device networking
Compatibility:
- Fully compatible with PC/AT ISA bus systems
- Works with standard serial communication software via COM ports
- Supports MOXA’s PComm and API‑232 libraries for custom application development
- Compatible with Opt8x connection boxes for RS‑232/422/485 interfacing
### 5. Components & Accessories
Included Items:
- C168H 8‑port RS‑232 ISA board
- Device driver diskettes (Windows NT/95/98, DOS)
- PComm Lite software diskette
- User’s Manual
Optional Connection Accessories (Opt8x Series):
- Opt8A: RS‑232 connection box, 8 × DB25 female ports
- Opt8B: RS‑232 connection box, 8 × DB25 male ports
- Opt8S: RS‑232 connection box, 8 × DB25 female ports with surge protection
- Opt8C: RS‑232 octopus cable, 8 × DB25 male connectors (1 m)
- Opt8D: RS‑232 octopus cable, 8 × DB9 male connectors (1 m)
- Opt8F: RS‑422 connection box, 8 × DB25 female ports with 500 V isolation
- Opt8Z: RS‑422 connection box, 8 × DB25 female ports (non‑isolated)
- Opt8J: RS‑422/485 connection box, 8 × DB25 female ports with DIP switches for mode selection
Cabling:
- Standard 1.5 m DB62‑to‑DB62 cable between board and connection box
- Optional 110 V/220 V power adapter for Opt8F/J/Z boxes
### 6. Installation & Setup
Hardware Installation:
1. Power off the PC and insert the C168H into an available 16‑bit ISA slot.
2. Connect the DB62 cable to the appropriate Opt8x connection box.
3. Configure I/O address and IRQ using MOXA’s IO‑IRQ.EXE utility under DOS, or use Quick Installation (JP1 shorted) for automatic configuration under Windows NT/95/98.
4. Restart the system to apply configuration changes.
Software Installation:
- Windows NT: Install via Control Panel → Network → Adapters → Add → Have Disk. Configure board type, I/O address, IRQ, and COM port mapping.
- Windows 95/98: Run Setup95.exe from driver diskette; configure ports and COM numbers in the Smartio/Industio Configuration Panel.
- DOS: Run DOSINST.EXE to install API‑232 drivers; configure using SETUP.EXE and load driver SER‑DRV.EXE.
Configuration Parameters:
- I/O Address (default): 0x180–0x1B8 (ports 1–8)
- IRQ (default): 10
- Interrupt Vector (default): 0x1C0
- CAP (Configuration Access Port): identical to first port’s base address (default 0x180; forced 0xA700 if JP1 shorted)
Mounting Options:
Standard ISA slot installation; external connection via DB62 cable to rack‑mount or desktop connection boxes.
### 7. Performance & Capabilities
- Maximum Baud Rate: 921.6 kbps per port (C168H)
- FIFO Buffers: 16‑byte transmit and receive FIFOs per UART
- Throughput: Optimized for multi‑threaded, multi‑process environments under Windows NT/95/98
- Latency: Low interrupt latency due to ASIC integration and interrupt vectoring
- Capacity: Up to four C168H boards (32 ports) per system
- Efficiency: Hardware flow control and FIFO buffering minimize CPU utilization
- Limitations: RS‑232 signal levels limit cable length (~15 m typical); for longer distances use RS‑422/485 options (Opt8F/J/Z)
### 8. Standards & Compliance
- Electrical Interface Standards:
- RS‑232 (EIA/TIA‑232‑E)
- RS‑422 (EIA/TIA‑422‑B)
- RS‑485 (EIA/TIA‑485‑A)
- Bus Compatibility: ISA and EISA compliant
- Operating System Compliance:
- Windows NT/95/98 (Win32 COMM API)
- DOS (API‑232)
- Linux, SCO UNIX/OpenServer, QNX, FreeBSD (native or MOXA‑supplied drivers)
- Safety & Reliability:
- Isolation protection (Opt8F) up to 500 V DC
- Surge protection (Opt8S) for RS‑232 lines
- Environmental: Operating temperature 0 – 55 °C; designed for industrial environments
- Regulatory: Meets general PC/AT hardware standards; conforms to MOXA internal quality and reliability testing
### 9. Additional Information
Warranty & Support:
MOXA provides standard warranty coverage for manufacturing defects. Technical support, driver updates, and documentation are available through MOXA Internet Services:
- Email: support@moxa.com.tw
- FTP: ftp.moxa.com / ftp.moxa.com.tw (user ID: ftp; password: your email address)
- Web: www.moxa.com
Maintenance:
- Periodically check cable connections and ensure proper grounding.
- Use MOXA diagnostic utilities (PComm Diagnostic, API‑232 Diagnose) to verify port functionality.
- Firmware and driver updates can be downloaded from MOXA’s FTP site.
Software Tools:
- PComm (Windows): Serial communication library and utilities including terminal emulator, diagnostic, and monitor tools.
- API‑232 (DOS): Serial programming library supporting C, Pascal, BASIC, Assembly, and Clipper.
- Utilities: IO‑IRQ.EXE (hardware configuration), SETUP.EXE (DOS driver setup), SER‑DRV.EXE (driver loader), SCOPE.EXE (data scope), DIAGNOSE.EXE (hardware test).
Troubleshooting Highlights:
- If board not detected, verify CAP address and IRQ conflicts.
- Use JP1 jumper to reset CAP to 0xA700 for recovery.
- Ensure correct driver version and matching hardware configuration.
- For data errors, check cable wiring and flow control settings.
Return & RMA Procedure:
Customers must provide proof of purchase, complete a Problem Report Form, and obtain an RMA number before returning products. Units should be packed in anti‑static packaging and shipped prepaid to the authorized dealer.
### Summary
The MOXA C168H is a robust, high‑performance 8‑port RS‑232 ISA communication board engineered for industrial and commercial serial networking applications. Its combination of high‑speed 921.6 kbps operation, 16550 UART architecture, and software‑configurable design makes it ideal for system integrators and OEMs requiring reliable multi‑port serial connectivity. With comprehensive driver support, diagnostic utilities, and flexible connection options (RS‑232/422/485), the C168H delivers proven reliability and scalability for automation, data acquisition, and communication systems.
-
C168P.pdf
Manual
- Opt8A - 8-port RS232 (DCE) female DB25 box
- Opt8B - 8-port RS232 (DTE) male DB25 box
- Opt8C - 8-port RS-232 (DTE) 8*cable male DB25
- Opt8D - 8-port RS-232 (DTE) 8*cable male DB9
- Opt8J/230 - 8-Port RS-422/485 female DB25 box
- Opt8F/230 - Isolated 8-port RS422 female DB25 box
- Opt8K/230 - 8-port RS-422/485 female DB25 box with ADDC
- Opt8S - 8-port RS-232 female DB25 box
- Opt8Z/230 - 8-port RS422 female DB25 box
