EXSYS EX-45034 PCIe 4-Port Serial RS-232/422/485 Card (FTDI)

This EXSYS PCIe card stands out by supporting RS-232, RS-422, and RS-485 on all four ports, with auto-toggle transceivers and selectable termination for RS-485. The FTDI FT4232H chipset ensures broad OS compatibility and reliable performance.

Highlights

• 4 serial ports via included fan-out cable with DB9 male connectors
• Supports RS-232, RS-422, and RS-485 standards
• FTDI FT4232H chipset with 256-byte FIFO per direction per port
• High data rates: up to 921.6 Kbps for RS-232, 12 Mbps for RS-422/485
• Low-profile PCIe x1 form factor with standard bracket included
• 15KV ESD protection on all serial lines

In daily use

The card installs in a PCIe x1 slot and provides four independent serial ports, configurable for RS-232, RS-422, or RS-485. Hardware and software flow control are supported, along with flexible data bits, parity, and stop bit settings. RS-485 mode includes auto-toggle transceivers and selectable termination/biasing for reliable multi-drop networks.

Full specifications

• Host interface: PCI Express x1
• Output interface: Serial (RS-232/422/485)
• Serial ports quantity: 4
• Connector: DB9 male (via fan-out cable)
• Chipset: FTDI FT4232H
• Data bits: 5, 6, 7, 8
• Stop bits: 1, 1.5, 2
• Parity: None, Even, Odd, Mark, Space
• Flow control: Hardware (RTS/CTS), Software (XON/XOFF)
• FIFO: 256-byte transmit, 256-byte receive per port
• Max baud rate: 921.6 Kbps (RS-232), 12 Mbps (RS-422/485)
• ESD protection: 15KV (Human Body Model)
• Operating temperature: 0°C to 70°C
• Supported OS: Windows (XP/Vista/7/8/10/11, Server 2003/2008/2012/2016/2019/2022), Linux, macOS
• Form factor: Low profile (standard bracket included)

Final note

Ideal for industrial automation, POS systems, and legacy device connectivity where multiple serial protocols are required.