Features include ...
Plugs directly into a IBM PC 9-way serial port
tested at >1000V AC
in most applications
(1200-38400 baud for K3-ADE)
Enable (ADE) version - K3-ADE
Very low supply
swings above and below ground
compatible (also known as SMPTE) RS422 pinout
Very low cost
and all options
K3 is an isolated RS232-RS422/485 converter for up to 38400 baud.
RS485 use, RTS
Control may be required from the RS232 device.
The K3-ADE does not need RTS Control.