Dell PowerConnect J-EX4200 Hardware Manual page 38

Dell PowerConnect J-Series J-EX4200 Ethernet Switch Hardware Guide
22
J-EX4200 switches use power that provides two DC output voltages: 12 V for system and
logic power and 48–51 V (or higher, to compensate for voltage drops along the path from
the power supplies to the RJ-45 connector) for PoE ports.
The AC power supply in J-EX4200 switches is available in 320 W, 600 W, and 930 W
models. The exterior of the 600 W model is identical to that of the 930 W model. The
320 W power supply is flush with the chassis. The 600 W power supply and 930 W power
supply extend out of the chassis by 2.25 in. The power cord retainer clips extend out of
the power supply by 3 in. The number of ports on which PoE is enabled determines the
minimum power requirements.
Figure 11: 320 W AC Power Supply in J-EX4200 Switches
Figure 12: 600 W and 930 W AC Power Supplies in J-EX4200 Switches
To avoid electrical injury, follow instructions in "Installing a Power Supply in a J-EX4200
Switch" on page 106 and "Removing a Power Supply from a J-EX4200 Switch" on page 140
carefully.