Epson PowerLite 5350 User Manual page 35

Note: If your system uses a serial mouse, perform steps 2 and 3 using
the PC mouse serial cable instead of the PS/2 mouse or USB cable (not
shown in the illustration).
4. To use the ELP Link IV software or to program new effects for the
Effects buttons on the remote control, connect one end of the
serial cable to the SERIAL terminal on the square end of the main
cable.
Connect the other end of the serial cable to the serial port on the
back of your computer.
Note: You will not be able to use ELP Link IV software if your system
has only one serial port that is being used to support a serial mouse.
5. Tighten the screws on all connectors.
Connecting to a Computer
27