Features include ...
Plugs directly into a IBM PC 9-way serial port
in most applications
Enable (ADE) version - K2-ADE
400 watt surge
protection in ADE version
Very low supply
swings above and below ground
compatible (also known as SMPTE) RS422 pinout
Very low cost
K2 is a non-isolated RS232-RS422/485 converter for up to 115200 baud.
RS485 use, RTS Control may
be required from the RS232 device.
The K2-ADE does not need RTS Control.