You can use
the Epson Scan Settings software to change the time period before
the scanner turns off automatically.
Do one
of the following to access the Epson Scan Settings program:
Windows 8: Navigate to the Start screen, right-click the screen, and select
All apps. Click EPSON Scan Settings.
Windows (other versions): Click or
Start, and select All Programs or Programs. Select Epson, then EPSON
Scan, then click EPSON Scan
Settings.
Mac OS X: Open the Applications folder, then open the Epson Software folder and double-click the
EPSON Scan Settings icon.
Click
Power Off Timer.
Enter
the time period you want before the scanner turns off automatically
as the Power Off Timer setting. (To
disable the Power Off Timer setting,
enter 0 (zero).)