Dell PowerConnect J-EX4200 Hardware Manual page 135

If the AC power source outlet has a power switch, set it to the OFF (0) position.
6.
Insert the jumper cord or power cord plug into an AC power source outlet.
7.
If the AC power source outlet has a power switch, set it to the ON (|) position.
8.
Verify that the AC OK LED on the power supply is lit and is on steadily.
9.
Figure 46: Connecting the AC Jumper Cord or Power Cord Retainer Clip
to an AC Power Supply in a J-EX4200 Switch
Figure 47: Connecting an AC Jumper Cord or Power Cord to an AC Power
Supply in a J-EX4200 Switch
Related Connecting and Configuring a J-EX Series Switch (CLI Procedure) on page 131
Documentation
Connecting and Configuring a J-EX Series Switch (J-Web Procedure) on page 133
Power Supply in J-EX4200 Switches on page 21
AC Power Supply LEDs in J-EX4200 Switches on page 24
NOTE: When you connect power to the switch, the Alarm (ALM) LED lights
red to indicate that the network link is disconnected. This behavior is normal.
Plugging an active Ethernet cable into the management (MGMT) port on the
switch completes the network link and turns off the ALM LED. (See
"Connecting a J-EX Series Switch to a Network for Out-of-Band Management"
on page 120.)
Connecting the switch to a dedicated management console instead of a
network does not affect the ALM LED. The LED remains red until the switch
is connected to a network.
Chapter 11: Connecting the Switch
119