Internal COM Expansion Card adapter Lenovo — RS-232 output, BTB host interface, male, green, 39.5×36.2×1.6 mm

The Lenovo Internal COM Expansion Card adapter provides an RS-232 serial output via a BTB (board-to-board) host interface. This compact, green PCB module (39.5 × 36.2 × 1.6 mm) is intended for internal installation in compatible Lenovo Tiny systems and enables connection of legacy devices, industrial equipment or peripherals that require an RS-232 interface. The adapter is certified to FCC, CE and CB standards and is compatible with Windows 11.

Advantages

The adapter offers a straightforward RS-232 output through a male BTB host connector, occupying minimal space on the system board. Its compact dimensions and standardized certifications simplify integration into compatible Lenovo PCs while maintaining proper electrical and regulatory compliance for serial communication.

Suitable for

• Connecting legacy serial devices that use RS-232
• Industrial controllers and measurement equipment
• Peripherals requiring an internal serial port in Lenovo Tiny systems
• System integrators and technicians installing internal expansion modules

Key specifications

• Interface: RS-232 output via BTB (board-to-board) host interface
• Connector: male BTB host
• Dimensions: 39.5 × 36.2 × 1.6 mm
• Color: green (PCB)
• Compatibility: selected Lenovo Tiny PCs; Windows 11 supported
• Certifications: FCC, CE, CB
• Manufacturer part number (MPN): 4XH1K25073
• EAN: 0195892090182

How to use

Install the expansion card adapter on the designated BTB host connector inside a compatible Lenovo Tiny system following the PC manufacturer’s service instructions. Ensure the system is powered off and unplugged before installation. After physical installation, verify that the connection is secure and boot the system. Install or verify device drivers and configure the serial port parameters (baud rate, parity, data bits, stop bits) in the operating system to match the connected device.

Recommendations

Use this internal adapter only with supported Lenovo Tiny models and consult the system hardware manual for proper installation locations and handling. Avoid electrostatic discharge during handling and confirm RS-232 signal levels and grounding match the connected equipment.