Interface adapter InLine 76619E — serial/parallel connectivity accessory

The InLine PCIe 4-Port RS-232 Card provides four independent serial interfaces in D-Sub 9 (male) format for expanding modern PCs and industrial systems. Equipped with the CH384L chipset, the card supports flexible baud rates up to 921,600 bps, a 256-byte FIFO buffer for transmit and receive, and integrated ESD protection up to ±15 kV. The PCIe x1 form factor fits into standard and low-profile housings and is compatible with PCIe v2.0 and higher. The card supports common RS-232 signal lines and is compatible with a range of Windows and Linux operating systems.

Advantages

The card offers reliable serial communication through four independent RS-232 ports and stable transmission thanks to the industrial-grade CH384L controller. A 256-byte FIFO buffer reduces data loss under high loads, while ±15 kV ESD protection guards interfaces against electrostatic discharge. The PCIe x1 interface and included full- and low-profile brackets ensure broad compatibility with modern PC chassis.

Suitable for

• Machine control and automation systems
• Measurement and data acquisition equipment
• Network management and industrial controllers
• POS terminals and legacy peripheral connections

Key specifications

• Interface: PCIe x1 (compatible with PCIe v2.0 and higher)
• Ports: 4 × RS-232, D-Sub 9 (male)
• Chipset: CH384L
• Baud rate range: 50 to 921,600 bps
• FIFO buffer: 256 bytes transmit and receive
• Supported signals: TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI
• Transmission mode: Full duplex
• Data bits: 5, 6, 7, 8
• Stop bits: 1 or 2
• Parity options: none, even, odd, mark, space
• ESD protection: up to ±15 kV
• Operating temperature: 0 °C to 55 °C
• Storage temperature: -40 °C to 70 °C
• Maximum humidity: 90% non-condensing

How to use

Install the card into an available PCIe x1 slot (or larger PCIe slot) on the host computer, selecting the appropriate full-size or low-profile bracket included with the product. Attach serial devices using standard D-Sub 9 cables to the four RS-232 ports. Install device drivers supplied on the driver CD or download current drivers for your operating system. Configure serial port parameters (baud rate, data bits, stop bits, parity, flow control) in the host OS or application to match the connected devices.

Usage recommendations

Verify cable quality and shielded D-Sub 9 connectors for long runs or electrically noisy environments, and ensure correct serial settings (baud rate, parity, flow control) on both ends to maintain stable communication. For industrial installations, mount the card in a grounded chassis and avoid exposing it to temperatures or humidity beyond the specified ranges.