SIIG
Single Serial PCIe Card Adapter, 16650 UART, Baud Rates up to 250Kbps, PCIe 2.0 x1 to 1x RS-232 Male 9-pin DB9, RS-232 5V or 12V Power, ASIX AX99100 Chipset, Dual-Profile Brackets (JJ-E20611-S1)
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
SpecPicks Verdict
SpecPicks classifies SIIG Single Serial PCIe Card Adapter, 16650 UART, Baud Rates up to… as a category leader on buyer feedback in the expansion cards category, based on 5 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. SIIG's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 4.6★ average across customer reviews
- ✓ Backed by SIIG's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Limited review volume so far — fewer data points on long-term reliability
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- PCIe CARD: Adds 1 9-pin RS-232 serial port to PCIe enabled desktop computers, supports data transfer rate up to 250Kbps, Compliant with PCI Express 2.0 Gen 1
- SEAMLESS CONTROL: Single-lane (x1) PCI Express End-point Controller with PHY integrated; Full serial modem control with hardware and software flow control; Supports 5, 6, 7, 8 and 9-bit serial formats, and Even, Odd, None, Space and Mark parity; On chip 256-byte FIFO buffers in transmit and receive path for each serial port
- RS-232: Works as either standard RS-232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays and many more). Configurable via jumpers
- DUAL-PROFILE BRACKETS: Supports PCI Bus Power Management Interface Specification Revision 1.2; Dual profile design installs into both full-size and low-profile system chassis with the included mounting brackets; Installs into any PCI Express slot of any lane width
- INDUSTRY SOLUTIONS: Perfect solution to connect with POS system, industrial testing and control device, security system, logistic management equipment, printers, scanners, etc
Full Specifications
| Brand | SIIG |
|---|---|
| Style | Classic |
| PCIe CARD | Adds 1 9-pin RS-232 serial port to PCIe enabled desktop computers, supports data transfer rate up to 250Kbps, Compliant with PCI Express 2.0 Gen 1 |
| Style Name | Classic |
| Unit Count | 1.0 Count |
| Model Number | JJ-E20611-S1 |
| Mfr Part Number | JJ-E20611-S1 |
| Operating System | Most common operating systems |
| Compatible Devices | POS systems, industrial testing and control devices, security systems, logistic management equipment, printers, scanners |
| Hardware Interface | PCI Express x1 |
| Warranty Description | 2 Year Limited |
Ready to buy?
SIIG Single Serial PCIe Card Adapter, 16650 UART, Baud Rates up to 250Kbps, PCIe 2.0 x1 to 1x RS-232 Male 9-pin DB9, RS-232 5V or 12V Power, ASIX AX99100 Chipset, Dual-Profile Brackets (JJ-E20611-S1) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
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