Internal RS-232 Adapter DeLOCK 90411

The DeLOCK 90411 internal RS-232 adapter is a compact PCIe expansion card designed to add a single RS-232 serial port to a desktop or embedded system. The card provides a standard RS-232 output interface in a green PCB design and supports asynchronous serial communication at data transfer rates up to 0.0009216 Gbit/s. With an internal form factor and small physical dimensions (78 mm × 93 mm × 12 mm), the adapter fits into typical PC chassis to connect legacy serial devices, modems, barcode scanners or other RS-232 peripherals.

Advantages

The adapter offers a straightforward way to integrate one RS-232 port into systems that lack a native serial connector. A 256-byte FIFO buffer helps ensure stable data flow and reduces CPU load during burst transfers. The product supports configurable data bits (5, 6, 7 or 8) to match a range of serial protocols and devices. Compatibility with common Windows versions provides broad driver support for many applications.

Suitable for

• Adding a single RS-232 port to desktop PCs and industrial PCs
• Connecting legacy serial peripherals such as modems, barcode scanners, or serial printers
• Embedded systems or compact builds where internal PCIe expansion is required
• Software development and testing that require standard COM port access

Key specifications

• Host interface: PCIe
• Output interface: RS-232 (single port)
• Maximum data transfer rate: up to 0.0009216 Gbit/s
• FIFO buffer: 256 B
• Supported data bits: 5, 6, 7, 8
• Maximum recommended cable length: 0.45 m
• Form factor: internal PCIe expansion card
• Colour: green PCB
• Physical dimensions (W × D × H): 78 mm × 93 mm × 12 mm
• Operating system support: Windows 10, Windows 8.1, Windows 7

How to use

Install the adapter into an available PCIe slot on the motherboard while the system is powered off and the case is open. Secure the card in the chassis according to the case mounting method and reconnect power. After booting the system, install the appropriate drivers for the operating system if they are not automatically detected. Connect the RS-232 peripheral to the adapter using a suitable serial cable not exceeding the recommended cable length, then configure the COM port settings (baud rate, parity, stop bits, and data bits) in the application or device manager to match the connected device.

Usage recommendations

Use shielded serial cables and keep cable runs short (within the specified 0.45 m) to maintain signal integrity. Verify driver compatibility with your Windows version and set the serial port parameters to match the peripheral device for stable communication. For installations in electrically noisy environments, consider additional grounding or surge protection for the connected devices.