Design
Product colour	Green
Purpose	PC
Certification	FCC,CE,CB
Internal
Operational conditions
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	0 - 90%
Other features
Compatibility	ThinkCentre Tiny
Packaging data
Package width	132 mm
Package depth	136 mm
Package height	36 mm
Package weight	80 g
Package type	Box
Ports & interfaces
Host interface	BTB
Host interface gender	Male
Output interface	RS-232
System requirements
Windows operating systems supported	Windows 11
Weight & dimensions
Width	39.5 mm
Depth	36.2 mm
Height	1.6 mm
Weight	16.4 g

The Lenovo COM Expansion Card (manufacturer number 4XH1K25073) is an integrated interface card for use in ThinkCentre Tiny computers. It extends connection options by providing an RS-232 serial port. The card features a BTB host interface with male gender, which is directly integrated into the system. The product color is green, typical for internal components of this series. The card is designed for use in PCs and complies with FCC, CE, and CB certifications, confirming conformity with international electromagnetic compatibility and safety standards.

Applications

The card is specifically designed for use in ThinkCentre Tiny systems, which, due to their compact design, do not include serial ports by default. It enables connection to devices communicating via an RS-232 port, such as industrial control devices, measuring instruments, or older peripheral devices. The operating temperature ranges from 0 to 50 °C, and the relative humidity during operation is 0 to 90 %, ensuring suitability for controlled indoor environments.

Functions and Features in Detail

The card provides an RS-232 output connection, linked to the main system via the BTB host interface. The male gender of the host interface allows direct connection to the ThinkCentre Tiny motherboard. The card is certified for Windows 11, ensuring compatibility with the current operating system. The dimensions are 39.5 mm (width), 36.2 mm (depth), and 1.6 mm (height), enabling compact integration into the system frame. The weight is 16.4 g, emphasizing its low profile.

Technology Explained Simply

The BTB interface (Board-to-Board) is a flat, flexible connection technology commonly used in compact devices to save space. The RS-232 interface is a standard for serial data transmission, often used in older or specialized devices. The card acts as a bridge between modern PC systems and legacy devices communicating via this port. The FCC, CE, and CB certifications ensure electromagnetic compatibility and compliance with safety requirements.

Compatibility and Accessories

The card is only compatible with ThinkCentre Tiny models equipped with the corresponding BTB interface. Use is limited to the specified platform.

Installation and Mounting

Installation involves direct insertion into the designated socket within the ThinkCentre Tiny. The card is integrated and not connected externally. Mounting requires no additional tools or components, as it is directly integrated into the system.

Operational Advantages

The card enables use of RS-232-capable devices in a modern, compact PC system. Its low profile and light weight ensure unobtrusive integration. Certification for Windows 11 guarantees seamless system integration. The operating conditions are designed for typical indoor environments, enabling reliable performance in office settings or small server rooms.