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Green PCI card with two DB9 male ports on a metal bracket

SUNIX

SUNIX SER5037A 2-port RS-232 PCI expansion card

SKU CH-TSRY-6H7T0 MPN SER5037A

Adds two RS-232 serial ports via a universal PCI slot with a SUN1989 controller supporting up to 115.2 Kbps

  • Product typePCI to Serial Port Card
  • DetailsSerial Communication -Interface: RS-232 -Controller: SUNIX S
  • Key featuresExpands 2 independent RS-232 serial port with communication
  • Product dimensionsPCB Dimension: 120 × 82 mm Bracket: Standard 121 mm
  • Adds two RS-232 ports with 115.2 Kbps speed
  • Universal PCI bus fits 3.3 V and 5 V slots
  • SUN1989 controller provides 128 byte hardware FIFO
  • ±2 kV ESD protection on every signal line
  • Drivers for Windows, Linux, DOS, FreeBSD, QNX, OS/2, SCO, Solaris

Two RS-232 ports on Universal PCI

The SUNIX SER5037A adds two independent RS-232 serial ports to a desktop computer through a Universal PCI slot. It uses the SUN1989 controller which is compatible with the 16C950 UART standard. The card supports PCI specifications 3.0, 2.3, 2.2 and 2.1 at 33 MHz and works with both 3.3 V and 5 V bus signalling.

Full modem signals and ESD protection

Each DB9 male connector provides the full set of nine signals including TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI and GND. The on-board controller offers 128 byte hardware FIFO buffers and supports baud rates from 50 bps to 115.2 Kbps. Every signal line carries +/-2 kV ESD protection under the Human Body Model. Driver packages cover Windows client and server releases from XP through 8.1, Linux kernels 2.4 to 3.x, DOS, FreeBSD, QNX, OS/2, SCO UnixWare and Solaris 10.

Check for a free Universal PCI slot

Verify that the motherboard has an available Universal PCI slot compatible with 3.3 V or 5 V operation before ordering. The printed circuit board measures 120 x 82 mm and the standard bracket is 121 mm wide, so confirm that the chassis can accommodate a full-height card. IRQ and I/O addresses are assigned automatically by the system, but legacy operating systems such as DOS or early Windows versions may require manual configuration. Buyers who need more than two serial ports or a different bus interface such as PCI Express should consider other models.

How it compares

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

Price $16.99
Cheaper than about 78% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameSUNIX
Model nameSER5037A
Product typePCI to Serial Port Card
Size & build
Product dimensionsPCB Dimension: 120 × 82 mm
Bracket: Standard 121 mm
Shipping weight0.20 kg
Package size221 × 154 × 44 mm

Questions about this item

Will the SUN1989 controller or the DB9 connectors need replacement after long use?

The card uses a SUN1989 16C950 compatible UART and DB9 male connectors; solid-state components and standard connectors typically last the life of the system without scheduled replacement.

What limits sustained throughput on each RS-232 port?

Each port is rated to 115.2 Kbps with a 128-byte hardware FIFO, so the baud-rate ceiling and FIFO depth determine maximum continuous data rate.

How much heat or noise does the card add when running all day?

The board has no fan and draws power only from the 3.3 V or 5 V Universal PCI slot, so it adds negligible heat and zero audible noise during continuous operation.

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