Dell Precision Workstation T3400 Guide De Référence Rapide page 14

Back View (Tower Orientation)
power connector
1
voltage selection
2
switch
back panel
3
connectors
14
Quick Reference Guide
Insert the power cable.
See the safety instructions in the Product Information
Guide for more information.
NOTE:
The voltage selection switch is available on the 375-W
PSU only.
Plug serial, USB, and other devices into the appropriate
connector.
1
2
3
4