KALEA-INFORMATIQUE Mini PCI Express MiniPCIe 2 Port RS422 RS485 DB9 Serial Card with EXAR XR17V352 Chipset Supplied with Adapters for Wire to Wire Mount.

Mounts to the mini PCI Express port of laptops (52 pin).
Compatibility:
Drivers for Windows 11, 10, 8, Windows 7 / Vista / XP / Server 2003-2008-2012, Linux Kernel 2.6x or higher.
Specifications:
EXAR XR17V352 Chipset.
Mini PCIe Rev 1.2
RS485 signals: DATA+ (B), DATA-(A), GND.
RS422 signals: T/R+, T/R-, RXD+, RXD-, GND.
600W surge protection.
15KV ESD protection for all serial ports.
Operation mode: asynchronouspoint-to-point or point-to-multipoint
Mounting 2 wires (half duplex) or 4 wires (full duplex).
Transmission distance 1.2km (300bps-921600bps)
Sleep mode with alarm clock indicator.
The UART interface supports 7/8 data bits and even/odd/mark/space/no parities.
None,hardware and xon/xoff flow control.
Support point-to-multipoint transmission.
Each converter can connect 32 RS-422 or RS-485 equipment.
Operating temperature range -40 to 85C.
The board is supplied with a 2-port extension bracket with DB9 male plugs and insert plates for wire-to-wire mounting.