We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in

Syba

Syba SI-PEX15042 4-port RS-232 PCIe x1 expansion card

SKU CH-VJ7D-WKJR6 MPN SI-PEX15042

Adds four RS-232 serial ports via a PCIe 2.0 x1 slot using an Exar XR17V358 controller

  • Operating Systems SupportedWindows 8 Windows 7 XP Vista Windows Server 2003/2008/2012 L
  • FeaturesExar Chipset: XR17V358 PCIe 2.0 Gen 1 compliant x1 Link, dua
  • Weight1.01
  • Package Contents1 x 4-port PCIe Serial Card 1 x 4-port Serial Octopus Cable
  • Adds four serial ports via a single PCIe x1 slot
  • Exar XR17V358 chipset provides 16C550 UART compatibility
  • PCIe 2.0 Gen 1 x1 link at 2.5 Gbps per direction
  • Includes full-height and low-profile brackets for flexible installation
  • Supports Windows 7 through Server 2012 and Linux 2.6.27 or newer

Four RS-232 ports on PCIe x1

This Syba SI-PEX15042 card adds four serial ports through a single PCIe 2.0 x1 slot using the Exar XR17V358 chipset. It targets industrial users, POS integrators and anyone connecting legacy modems, mice or machinery that still rely on RS-232 signalling. The board fits full-height and low-profile chassis thanks to the included bracket.

Verify slot and OS support first

Confirm the motherboard has a free PCIe x1, x2, x4, x8 or x16 slot with the correct keying for a 2.5 Gbps Gen 1 link. Driver availability covers Windows 8, 7, XP, Vista, Server 2003, 2008, 2012 and Linux kernels 2.6.27, 2.6.31, 2.6.32 and 3.x or newer. The octopus cable and four adapters use DB-9 connectors, so check your peripheral cables match.

Sustained throughput at 2.5 Gbps per direction

The dual-simplex PCIe link delivers 2.5 Gbps each way continuously, so all four ports can transmit and receive together without bus saturation. The XR17V358 is compatible with the 16C550 UART standard, providing deterministic latency for industrial automation and data-logging tasks that run for hours rather than seconds.

Highlights

  • Adds four serial ports via a single PCIe x1 slot
  • Exar XR17V358 chipset provides 16C550 UART compatibility
  • PCIe 2.0 Gen 1 x1 link at 2.5 Gbps per direction
  • Includes full-height and low-profile brackets for flexible installation
  • Supports Windows 7 through Server 2012 and Linux 2.6.27 or newer

Specifications

BrandSYBA
ModelSI-PEX15042
Operating Systems SupportedWindows 8
Windows 7
XP
Vista
Windows Server 2003/2008/2012
Linux 2.6.27, 2.6.31, 2.6.32, 3.x.x and newer
FeaturesExar Chipset: XR17V358
PCIe 2.0 Gen 1 compliant
x1 Link, dual simplex, 2.5Gbps in each direction
Supports x1, x2, x4, x8, x16 PCIe Bus connector keys
RS485 signals:
DATA+ (B)
DATA- (A)
GND
RS422 signals:
T/R+
T/R-
RXD+
RXD-
GND
600W surge protection, 15KV ESD protection for serial ports
Working mode: asynchronous working, point-to-point to point-to-multipoint 2 wires (half duplex) 4 wires (full duplex)
Transmission distance: RS-485/422 port:1.2km (300bps-921600bps)
Transmission media: twisted-pair cable or shielded cable
Interface protection: 600W surge proteection, 15 kV ESD protect
Weight1.01
Package Contents1 x 4-port PCIe Serial Card
1 x 4-port Serial Octopus Cable
4 x Serial Adapters
1 x User Manual
1 x Driver CD
1 x Low Profile Bracket
Shipping weight0.91 kg
Package size307 × 185 × 61 mm

Questions about this item

What cables and brackets come with the Syba SI-PEX15042 and what must be purchased separately?

The box includes the 4-port PCIe serial card, a 4-port serial octopus cable, four serial adapters, a low-profile bracket, a driver CD and a user manual. No additional cables or brackets are required for a standard installation.

Which version of the card should I choose for a PCIe 2.0 x1 slot?

The SI-PEX15042 is a PCIe 2.0 Gen 1 x1 card that also fits x2, x4, x8 and x16 slots, so a single version covers all those slot types.

What does the 2.5 Gbps per direction figure mean for real RS-232 throughput?

The 2.5 Gbps x1 link provides ample bandwidth for the Exar XR17V358 controller to run all four RS-232 ports at their maximum 16C550-compatible speeds without bottleneck.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.