SIIG
Single Serial Port/RS-232 and Single Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20311-S1)
*Price sourced from Amazon.com. Last updated 2026-05-23. Price and availability subject to change.
SpecPicks Verdict
SpecPicks classifies SIIG Single Serial Port/RS-232 and Single Parallel Port PCIe Card… as a solid pick with broad community endorsement in the expansion cards category, based on 30 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 — 4.5★ 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
- SERIAL AND PARALLEL PORT: Easily adds one serial port and one parallel port through an available PCI Express slot. 16C650 UART serial port with data transfer rates of up to 250Kbps. Compliant with PCI Express 2.0 Gen 1. Compatible with IEEE 1284 -1994 parallel port standard for SPP/Byte/ECP Mode
- PHY INTEGRATION: Single-lane (X1) PCI Express end-point controller with PHY integrated. Full serial modem control. Hardware and software flow control
- SERIAL FORMAT: 5, 6, 7, 8 and 9-bit serial format. Even, odd, none, space and mark parity. On chip 256 byte FIFO buffers in transmit, receive path
- RS-232: Works as standard RS-232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.), power output configurable via jumpers. Supports PCI bus Power Management Interface Specification Revision 1.2
- DUAL PROFILE: Dual-profile design fits full height and low-profile system chassis with the included spare low-profile brackets. Perfect solution to connect with POS systems, industrial testing and control devices, security systems, logistic management equipment, printers, scanners, etc.
Full Specifications
| Brand | SIIG |
|---|---|
| Style | Classic |
| Style Name | Classic |
| Unit Count | 1.0 Count |
| Model Number | JJ-E20311-S1 |
| SERIAL FORMAT | 5, 6, 7, 8 and 9-bit serial format. Even, odd, none, space and mark parity. On chip 256 byte FIFO buffers in transmit, receive path |
| Mfr Part Number | JJ-E20311-S1 |
| PHY INTEGRATION | Single-lane (X1) PCI Express end-point controller with PHY integrated. Full serial modem control. Hardware and software flow control |
| Operating System | DOS, Mac OS, Windows |
| Compatible Devices | Desktop |
| Hardware Interface | Parallel interface, Serial Interface |
| Warranty Description | 2 Year Limited |
Ready to buy?
SIIG Single Serial Port/RS-232 and Single Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20311-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 2026-05-23. Price and availability subject to change.
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