Connector:Serial Port

Aleste Serial/Mouse Port

The Aleste 520EX has a built-in 7pin DIN female connector

 1      RTS                  __ __
 2      GND                 /  -  \
 3      CTS                |7     6|
 4      RXD                |3     1|
 5      TXD                 \5_2_4/
 6      +12V
 7      RXD (shortcut to pin4)
 Shield GND

Other RS232 Ports

...