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Green circuit board with eight DB-9 ports on a metal bracket

SUNIX

SUNIX SER5466A 8-port RS-232 PCIe x1 expansion card

SKU CH-15YN-VEHWZ MPN SER5466A

Adds eight RS-232 serial ports via a PCIe x1 slot with 115.2 Kbps speeds and 128-byte FIFO buffers

  • SpecificationsInterface : RS-232 Controller: SUNIX SUN1999 (16C950 UART Co
  • FeaturesExpands 8 independent RS-232 serial ports with communication
  • Dimensions127 x 98 mm
  • Adds eight independent RS-232 ports for legacy device connectivity
  • SUN1999 16C950-compatible UART controller handles high-speed serial communication
  • PCI Express x1 interface fits x1, x2, x4, x8 or x16 slots
  • On-chip hardware auto flow control prevents data loss during transfers
  • Built-in ±15KV ESD protection meets IEC1000-4-2 standard for signal safety

Eight independent serial ports

The SUNIX SER5466A adds eight RS-232 interfaces through a single PCI Express x1 slot. A SUN1999 controller compatible with the 16C950 UART handles each channel with a 128 byte hardware FIFO. Communication rates span 50 bps to 115.2 Kbps with selectable data, stop and parity settings.

Industrial and legacy connectivity

This card suits users connecting PLCs, modems, barcode scanners or older industrial equipment that still rely on DB-9 serial links. It is not for builds needing USB, parallel or Ethernet expansion, nor for systems lacking a free PCI Express x1, x2, x4, x8 or x16 slot.

Check slot and bracket clearance

Verify the motherboard offers an open PCI Express slot with a standard bracket opening; the board measures 127 x 98 mm. Confirm the operating system is among supported Windows, Linux or DOS releases. Ensure connected devices use RS-232 signalling with TxD, RxD, RTS, CTS, DTR, DSR, DCD and ground pins.

Highlights

  • Adds eight independent RS-232 ports for legacy device connectivity
  • SUN1999 16C950-compatible UART controller handles high-speed serial communication
  • PCI Express x1 interface fits x1, x2, x4, x8 or x16 slots
  • On-chip hardware auto flow control prevents data loss during transfers
  • Built-in ±15KV ESD protection meets IEC1000-4-2 standard for signal safety

Specifications

BrandSUNIX
ModelSER5466A
SpecificationsInterface : RS-232
Controller: SUNIX SUN1999 (16C950 UART Compatible)
Bus: PCI Express one lane (x1)
No. of Port: 8-port
IRQ & IO: Assigned by System
FIFO: 128 byte (Hardware)
Signal: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
Baud rate: 50 bps to 115.2 Kbps
Data bit: 5,6,7,8
Stop bit: 1,1.5,2
Parity: None, Even, Odd, Space, Mark
Flow Control: None, Xon/Xoff, RTS/CTS
FeaturesExpands 8 independent RS-232 serial ports with communication speeds up to 115.2Kbps.
High speed SUN1999 16C950 compatible UART controller on-board.
Designed to meet PCI Express Base Specification Revision 1.1.
Supports x1, x2, x4, x8, x16 (lane) PCI Express Bus connector keys.
On-chip hardware auto flow control to guarantee no data loss.
Built-in ± 15KV ESD protection for all serial signals meets IEC1000-4-2 standard.
Plug-n-Play, I/O address and IRQ assigned by BIOS.
Certified by CE, FCC, RoHS, and Microsoft WHQL approval.
Support Microsoft Windows, Linux, and DOS.
Dimensions127 x 98 mm
Shipping weight0.69 kg
Package size226 × 183 × 97 mm

Questions about this item

What type of PCI Express slot does the SER5466A need to operate?

It fits any PCI Express x1, x2, x4, x8 or x16 slot and runs on a single lane.

Will the card share an interrupt with my existing PCI serial adapters?

The system assigns IRQ and I/O automatically, so the eight new ports coexist without manual conflict resolution.

How can I confirm all eight ports are communicating at 115.2 Kbps after installation?

Open Device Manager or run a terminal loop-back test on each port; the SUN1999 UART reports the active baud rate and 128-byte FIFO status.

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