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Silver ExpressCard adapter with two DB-9 serial ports and a short 15-pin cable

SerialGear

SerialGear SS-AS2RS Two Port RS-232 ExpressCard DB-9 Dongle expansion card

SKU CH-3XNY-HXBY3

Adds two DB-9 serial ports to notebooks with 34 mm or 54 mm ExpressCard slots, using 16C950 UARTs with 128-byte FIFOs at up to 921.6 Kbps

  • External connectors2 x Serial Ports
  • Product typePCI to Serial Port Card
  • Adds two serial ports to laptops with a 34 mm or 54 mm ExpressCard slot
  • 16C950 UART with 128-byte FIFOs reaches 921.6 Kbps without data errors
  • Hardware flow control via CTS/RTS and DSR/DTR prevents buffer overruns
  • Includes 15-pin-to-DB9 cable for immediate connection of legacy peripherals
  • Works with Windows 98, ME, XP and 2000 on a compact 4.41 x 1.34 inch card

ExpressCard serial adapter for legacy peripherals

The SS-AS2RS adds two DB-9 RS-232 ports to notebooks that have a 34mm or 54mm ExpressCard slot. It targets field engineers and industrial users who still rely on GPS receivers, barcode scanners, serial printers or older modems. The card plugs directly into the ExpressCard interface without an external power brick.

Low-power operation with 128-byte FIFOs

Each 16C950-compatible UART provides a 128-byte deep FIFO and supports baud rates up to 921.6K bps. Automated in-band Xon/Xoff and out-of-band CTS/RTS or DSR/DTR flow control prevent data under-run and over-run during sustained transfers. The compact 4.41 x 1.34 inch form factor draws minimal power from the slot.

Bundled 15-pin to DB-9 cable

A 15-pin-to-DB9M cable ships in the box to break out the card's 26-pin ExpressCard connector to two standard serial ports. Driver support covers Windows 98, ME, XP and 2000, so the adapter works on older maintenance laptops. No modern OS drivers or configuration utilities are included.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $28.99
Typical for this category: the median of 891 items is $30.99.

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Specifications

Product
Model nameSS-AS2RS
Product typePCI to Serial Port Card
Ports & slots
External connectors2 x Serial Ports

Questions about this item

How do I install the SS-AS2RS ExpressCard and which step is often missed?

Insert the 26-pin ExpressCard connector into a 34mm or 54mm slot until it clicks, then attach the 15-pin-to-DB9M cable to the card before connecting peripherals; the cable attachment is the step most users skip.

What maintenance or replacement will the SS-AS2RS need over time?

No scheduled maintenance is required; the only parts that may eventually need replacement are the 15-pin-to-DB9M cable or the DB9-Male connectors if they suffer physical wear.

What limit appears first during sustained high-speed transfers on the SS-AS2RS?

The 128-byte FIFO per transmitter and receiver combined with the 921.6Kbps maximum baud rate is the first bottleneck under continuous load.

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