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Green circuit board with four DB9 ports and an M.2 B+M key edge connector

Syba

Syba SY-PEX15066 4-port RS-232 DB9 M.2 B+M Key expansion card

SKU CH-DGV4-P3S6P MPN SY-PEX15066

Adds four RS-232 DB9 serial ports via an M.2 B+M Key slot with AX99100 chipset and up to 25 Mbps per port

  • External connectors4 x Serial Ports
  • Internal ports1 x M.2 B+M Key
  • Supported operating systemsWindows 7, 8, 10, Linux Kernal 2.6.15 , Android 1.x-5.x
  • Product typeRS-232 DB9 Serial M.2 B+M Key Controller Card
  • DetailsThe IOCrest SY-PEX15066 lets you add 4 RS-232 serial ports t
  • Key featuresAX99100 Chipset Supports RS-232 Bi-directional speeds up to
  • Add four serial ports via a single M.2 slot
  • AX99100 chipset delivers up to 25 Mbps per port
  • Full modem control with hardware and software flow control
  • Supports multiple parity modes and 9-bit multi-drop
  • Works with Windows 7, 8, 10, Linux 2.6.15 and Android 1.x-5.x

Four RS-232 ports via M.2

The Syba SY-PEX15066 adds four DB9 serial ports to an embedded computer through a single M.2 B+M key slot. It uses the AX99100 chipset to provide bi-directional speeds up to 25 Mbps per port with full modem control. Supported operating systems include Windows 7, 8, 10, Linux kernel 2.6.15 and Android 1.x through 5.x. The package includes the card, four serial cables, a driver CD and a user manual.

For industrial and legacy I/O expansion

This card suits engineers adding serial connectivity to industrial PCs, POS terminals or data-acquisition systems that have a free M.2 B+M key slot. It is not for builders whose platform lacks an M.2 B+M key connection or who need signalling standards other than RS-232. Buyers requiring more than four ports or a different physical interface should look elsewhere.

M.2 B+M key interface

The decisive specification is the M.2 B+M key edge connector, which determines whether the card fits the target system. Verify that the host board provides an M.2 B+M key slot wired for the required signals before purchase. The AX99100 chipset and 25 Mbps per-port rate are secondary to this physical compatibility requirement.

How it compares

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

Price $34.99
Pricier than about 57% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameSYBA
Model nameSY-PEX15066
Product typeRS-232 DB9 Serial M.2 B+M Key Controller Card
Ports & slots
External connectors4 x Serial Ports
Internal ports1 x M.2 B+M Key
Size & build
Shipping weight0.11 kg
Package size142 × 102 × 43 mm
Compatibility
Supported operating systemsWindows 7, 8, 10, Linux Kernal 2.6.15 , Android 1.x-5.x
In the box
In the box1 x M.2 B+M Key Serial DB9 RS-232
1 x Driver CD
1 x User Manual
4 x Serial DB9 Cables

Questions about this item

Should I pick a card with four DB9 ports or one with fewer ports for my embedded system?

This model provides exactly four RS-232 DB9 ports through a single M.2 B+M key slot, matching the port count in the specifications.

What does the 25 Mbps per port rating mean when the card is installed in a real machine?

Each of the four serial ports can transmit and receive at up to 25 Mbps bi-directional, giving full modem control and hardware or software flow control at that rate.

What does the M.2 B+M key interface cap in practice for this controller?

The card uses an M.2 B+M key connection and the AX99100 chipset to deliver four RS-232 ports with bi-directional speeds up to 25 Mbps each.

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