EXSYS EX-42372IS 2-Port PCI RS-422/485 Serial Card with Surge Protection, Low Profile

Industrial PCs and legacy equipment often need reliable RS-422/485 serial connectivity, but many modern systems lack these ports. The EXSYS EX-42372IS solves this by adding two high-speed RS-422/485 ports through a PCI slot, with robust surge protection to guard against electrical transients.

Who is it for

This card is ideal for system integrators, industrial automation engineers, and IT professionals who need to connect devices such as PLCs, sensors, barcode scanners, or POS terminals to a desktop computer. Its low-profile form factor makes it suitable for slimline or small form factor PCs.

Main features

• Two RS-422/485 serial ports with DB9 male connectors
• 15KV ESD and 600W surge protection on each port
• Supports RS-422 full duplex and RS-485 half/full duplex modes
• 128-byte FIFO buffer per port for smooth data flow
• Data rates up to 921.6 Kbps
• Includes both low-profile and standard brackets
• Universal PCI (3.3V/5V) compatibility

Specifications

• Bus interface: PCI 32-bit
• Chipset: Oxford OX16C950 compatible UART
• Serial standards: RS-422, RS-485
• Connectors: 2x DB9 male
• FIFO buffer: 128-byte transmit/receive per port
• Baud rate: up to 921.6 Kbps
• Surge protection: 15KV ESD, 600W surge
• Operating modes: RS-422 full duplex, RS-485 2-wire half duplex, 4-wire full duplex
• RS-485 termination: software selectable 120 Ohm
• Flow control: hardware (RTS/CTS), software (XON/XOFF)
• Parity: even, odd, none, mark, space
• Data bits: 5, 6, 7, 8
• Stop bits: 1, 1.5, 2
• Compatible operating systems: Windows (32/64-bit), Linux

Tips

For RS-485 networks, enable the 120 Ohm termination only on the devices at the ends of the bus to avoid signal reflections. The included low-profile bracket allows installation in slim desktop cases.