EXSYS EX-42034IS 4-Port RS-232/422/485 PCI Serial Card with Surge Protection & Optical Isolation

The EX-42034IS stands out by combining four serial ports with both optical isolation and surge protection on a single PCI card, making it suitable for industrial and harsh electrical environments where typical serial cards fail.

Highlights

• Four independent serial ports supporting RS-232, RS-422, and RS-485 standards
• 2.5 kV optical isolation per port prevents ground loops and noise
• 15 kV ESD surge protection on RS-232 lines and 600W surge protection on RS-422/485
• FTDI chipset ensures broad OS compatibility and reliable performance
• Data rates up to 921.6 Kbps (RS-232) and 1 Mbps (RS-422/485)

In daily use

Each port appears as a standard COM port in Windows, Linux, and macOS, allowing legacy industrial devices, POS terminals, and laboratory instruments to connect without proprietary drivers. The 128-byte FIFO buffer per direction reduces CPU load during continuous data streaming.

Full specifications

• Interface: PCI 32-bit, compliant with PCI 2.2
• Ports: 4 x DB9 male
• Serial standards: RS-232, RS-422, RS-485
• Chipset: FTDI
• Optical isolation: 2.5 kV
• Surge protection: 15 kV ESD (RS-232), 600W (RS-422/485)
• Max data rate: 921.6 Kbps (RS-232), 1 Mbps (RS-422/485)
• FIFO buffer: 128-byte TX and RX per port
• Data bits: 5, 6, 7, 8
• Stop bits: 1, 1.5, 2
• Parity: None, Even, Odd, Mark, Space
• Flow control: XON/XOFF, RTS/CTS, DTR/DSR
• Operating temperature: 0°C to 70°C
• Compatible operating systems: Windows XP/Vista/7/8/10/11, Windows Server, Linux, macOS
• Drivers: WHQL certified

Final note

For systems requiring reliable multi-port serial communication with protection against electrical hazards, the EX-42034IS delivers isolation and surge defense without sacrificing compatibility.