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Small green M.2 card with two DB9 serial ports

Vszerda

Vszerda 2-Port RS-232 Serial M.2 Controller Card SI-ADA15069

SKU CH-HC26-WNZ20

Adds two RS-232 serial ports via M.2 B+M key with 256-byte FIFOs and 300-921600 baud rates

  • Two independent UART channels for flexible serial expansion
  • 16550 compatible register set with 256-byte FIFOs per port
  • Data rates from 300 to 921600 baud for legacy and modern devices
  • Industrial temperature range -40°C to +85°C operation
  • M.2 B+M key form factor with 16 multi-purpose I/O lines

Two-Port RS-232 M.2 Controller Card

This Vszerda controller card adds two independent RS-232 serial ports to a system through an M.2 B+M key slot. It provides a 16550 compatible register set with 256-byte transmit and receive FIFOs for each UART channel. The card supports data rates from 300 baud up to 921600 baud and operates across a temperature range of -40°C to +85°C. It is designed for industrial or embedded applications requiring legacy serial connectivity.

Suits embedded developers and industrial integrators

Engineers maintaining equipment with DB9 interfaces will find the dual UART channels and 16 multi-purpose I/O lines useful for custom control tasks. The 32-bit data read/write operation and global interrupt status register simplify driver development. Buyers needing isolated serial ports, USB connectivity, or more than two channels should consider alternative expansion methods not covered by this specific card.

Verify M.2 B+M key slot and physical clearance

Confirm the host platform has an available M.2 slot supporting B+M keying before purchase. The card measures 2.6 cm in length, 10.3 cm in width, and 13.6 cm in height, so check internal chassis space for the board and connected DB9 cables. Ensure the operating environment stays within the specified -40°C to +85°C limits for reliable performance.

Highlights

  • Two independent UART channels for flexible serial expansion
  • 16550 compatible register set with 256-byte FIFOs per port
  • Data rates from 300 to 921600 baud for legacy and modern devices
  • Industrial temperature range -40°C to +85°C operation
  • M.2 B+M key form factor with 16 multi-purpose I/O lines

Specifications

No published specifications for this item yet.

Questions about this item

Does my motherboard need an M.2 B+M key slot for this Vszerda SI-ADA15069 card?

Yes, the controller installs in an M.2 B+M key slot and provides two RS-232 DB9 ports for serial devices.

Will the 16550-compatible UARTs work with legacy software written for standard COM ports?

The card uses a 16550-compatible register set with 256-byte FIFOs so existing DOS, Windows or Linux serial applications see it as a native COM port.

How can I confirm both serial channels are active after installation?

Check Device Manager or dmesg for two new COM/tty devices, then run a loop-back test on each DB9 connector at up to 921600 baud.

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