This document is the user manual for the PCI Express RS-422/485 Communication Board. It describes the features and characteristics of the communication board.
This manual provides all the information needed to install and operate the Sunix PCI Express RS-422/485 Communication Board. It includes safety instructions, a package checklist, hardware installation steps, driver installation for Windows and Linux, and detailed port configuration guidance.
The document also lists the board’s technical specifications such as supported baud rates, number of ports, FIFO size, protection features, and environmental limits, along with contact information for technical support.
| Baud rate | 50 bps ~ 921.6 Kbps |
|---|---|
| Number of ports | 1, 2, 4, 8, or 16 |
| FIFO size | 128 bytes |
| ESD protection | +15 kV |
| Surge protection | 500 W peak |
| Isolation protection | 2.5 kV |
| Connector type | DB9/25 Male |
| Operating temperature | 0 °C to 60 °C |
| Operating humidity | 5 % to 95 % RH |
The board supports Microsoft Windows (XP, Vista, 7, Server 2000/2003/2008) on both 32‑ and 64‑bit, Linux kernels 2.4.x and 2.6.x, and DOS.
The board is available in configurations with 1, 2, 4, 8, or 16 RS‑422/485 ports.
Each port includes a 128‑byte on‑chip transmit/receive FIFO.
It provides +15 kV ESD protection per signal, 500 W peak surge protection, and 2.5 kV isolation for all signal and power lines.