SIIG JJ-E40011-S5 DP CyberSerial 4S PCIE Drivers

SIIG DP CyberSerial 4S PCIe adds four RS-232 DB9 serial ports with 16550 UART, speeds up to 921Kbps, configurable 5V/12V power, PCIe connectivity, and dual-profile brackets.

Quick Install Steps

1. Power off the computer – Shut down Windows completely and disconnect the computer from power. Remove the case cover.
2. Install the card – Insert the SIIG DP CyberSerial 4S PCIe into an available PCIe x1 slot. Secure the card with the bracket and close the case.
3. Install the driver – Start Windows, download and extract the appropriate SIIG driver, then run the included setup program. Follow the on-screen instructions.
4. Verify the ports – Restart Windows if prompted and open Device Manager → Ports (COM & LPT). Confirm that all four RS-232 ports appear without warning icons.