Lenovo 4XH1U89936 ThinkCentre Tiny COM expansion card with BTB connector II content_copy

The Lenovo ACCS interface card with manufacturer number 4XH1U89936 is an integrated serial adapter for selected ThinkCentre and ThinkStation Tiny PC models. It extends connection options by providing an additional serial port, connected to the system via a BTB host interface. The card is finished in green and features a compact design with a width of 39.5 mm and a weight of 16.4 g, making it suitable for use in small form factors.

Applications

The adapter is specifically designed for integration into small desktop systems, particularly the Lenovo V-Tiny series (V100q, V105q), the ThinkCentre M-Tiny series (M70q Gen 6, M90q Gen 6), the ThinkCentre neo-Tiny series (neo 50q Gen 5, neo 50q Gen 6, neo 55q Gen 6), and the ThinkStation P3 Tiny Gen 2. These systems feature compact dimensions, so the card is installed as an internal expansion without requiring additional space inside the housing. The serial interface enables connection to devices communicating via RS-232 or similar serial protocols, such as industrial sensors, POS terminals, or legacy peripheral devices.

Functions and Features in Detail

The card features a BTB host interface, enabling direct connection to the host system’s motherboard. The output interface is serial, functioning as a COM port. The green color serves for visual identification within the system. The card is certified for operation under Windows 11, ensuring compatibility with the currently supported operating system. Certifications FCC, CE, CB, RoHS, UKCA, RCM confirm compliance with relevant safety and environmental standards.

Technology Explained Simply

The BTB interface (Board-to-Board) is a specialized connection technology used in compact computers to enable internal expansions without additional slots. The card is directly inserted into the designated socket within the system and provides a serial port recognized by the operating system as a COM port. The operating temperature range of 0 to 50 °C and relative humidity of 0 to 90 % during operation ensure reliable performance in typical office and industrial environments.

Compatibility and Accessories

The card is specifically designed for the mentioned Lenovo Tiny PC models. Compatibility includes the models Lenovo V100q, Lenovo V105q, ThinkCentre M70q Gen 6, ThinkCentre M90q Gen 6, ThinkCentre neo 50q Gen 5, ThinkCentre neo 50q Gen 6, ThinkCentre neo 55q Gen 6, and the ThinkStation P3 Tiny Gen 2. Combining it with these systems enables the use of an additional serial connection without requiring external adapters or additional hardware.

Installation and Mounting

Installation is performed by inserting the card into the designated BTB socket inside the PC housing. The card is designed as an internal expansion and requires no additional connectors or external power supply. Mounting is tool-free, as the card is simply inserted into the socket. The packaging is a box with dimensions 135 mm (width) × 130 mm (depth) × 35 mm (height) and a package weight of 70 g.

Operational Advantages

The card provides a reliable and compact solution for extending serial connection options in small PC systems. Direct integration via the BTB interface ensures a stable connection without additional cables or external adapters. Certification for Windows 11 guarantees seamless integration into existing IT environments. The low profile and lightweight design allow use in space-constrained systems without compromising functionality or stability.

Design
Product colour	Green
Certification	FCC, CE, CB, RoHS, UKCA, RCM
Internal
Operational conditions
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	0 - 90%
Other features
Compatibility	Lenovo V100q Lenovo V105q ThinkCentre M70q Gen 6 ThinkCentre M90q Gen 6 ThinkCentre neo 50q Gen 5 ThinkCentre neo 50q Gen 6 ThinkCentre neo 55q Gen 6 ThinkStation P3 Tiny Gen 2 Lenovo V Tiny Series - Lenovo V105q ThinkCentre M Tiny Series - ThinkCentre M70q Gen 6 ThinkCentre M Tiny Series - ThinkCentre M90q Gen 6 ThinkCentre neo Tiny Series - ThinkCentre neo 50q Gen 5 ThinkCentre neo Tiny Series - ThinkCentre neo 50q Gen 6 ThinkCentre neo Tiny Series - ThinkCentre neo 55q Gen 6 ThinkStation P Se
Packaging data
Package width	135 mm
Package depth	130 mm
Package height	35 mm
Package weight	70 g
Package type	Box
Ports & interfaces
Host interface	BTB
Output interface	Serial
System requirements
Windows operating systems supported	Windows 11
Weight & dimensions
Width	39.5 mm
Weight	16.4 g

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