Power-Up Sequence; Supply Power And Power Up The System - Dell S25N Quick Start Manual

Power Up Sequence

Supply Power and Power Up the System

There is no power switch. Supply power to the unit only after it is mounted.
CAUTION: To prevent electrical shock, make sure the switch is grounded
properly. If you do not ground your equipment correctly, excessive emissions
can result. Use a qualified electrician to ensure that the power cables meet
your local electrical requirements.
NOTE: A US AC power cable is included in the shipping container for powering
up an AC power supply. All other power cables must be ordered separately.
S25N
The S25N has two AC receptacles in the PSU side of the unit. The system can
use either power source independently, or act in load-sharing mode.
S25V
The S25V has both an AC (3-prong plug receptacle) and a DC (-48V terminal-
type) connection on the PSU side of the unit. Each power source can be used
independently or in load-sharing combination. In other words, you have three
options for providing power to the switch — AC only, DC only, or using both
AC and DC sources.
• To use AC only, connect the supplied AC power cord first to the switch
(receptacle on the right as you face the PSU side of the unit) and then to the
power source. Connect the plug to the AC receptacle, making sure that the
power cord is secure.
• For DC power, you must provide your own cables to connect to the power
source. Cables must be sized for 11.5 A service at no more than -48 VDC
input.
Step Task
Make sure that the remote power source (the circuit breaker panel) is in
1
the OFF position.
Remove the safety cover from the DC terminal block.
2
10
Installing the Hardware