Dell Force10 S50N Series, Installing Manual

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Figure 3-1. The S50N-DC Rear View
S50N and S50V
CAUTION: The power supply cord is used as the main disconnect device; ensure that the socket-outlet is
located/installed near the equipment and is easily accessible.
As shown in Figure 2-2 on page 9 , the rear of the S50N and S50V models have both an auto-sensing 110/
220V AC receptacle and a standard -48V terminal-type DC connector. The rear of an S50N differs only
in the arrangement of the lugs on its DC terminal block
(Figure 3-1) . Each system ships only with the AC
power cord. There is no power switch. Connecting the switch to either an AC or DC power source starts
the switch.
On both the S50N and S50V, either the AC or DC power supplies alone are sufficient to power the switch.
When both AC and DC power supplies are connected, they act in roughly a 60%/40% load-sharing mode.
On the S50V, when the Dell Force10 470W DC Backup Power Supply is connected to the Current
Sharing connection on the S50V DC terminal block, the switch uses the DC and AC power supplies in
current-sharing (load-sharing plus additive) mode, so that the total capability is 470W+470W = 940W.
See
Backup Power Components on page 29 .
Dell Force10 also offers an external 180W DC power supply for the S50N and S50N-DC models, the
same power supply used by the S50. However, the connections differ from those on the S50, so the power
supply ships with DC cables to support each model. Rack-mounting hardware is supplied. For details on
connecting to a power source, see
Supplying Power on page 27 .
Power over Ethernet (PoE) Support
Along with the optional DC power supply noted above, the S50V includes an internal 470W power
supply that supports both the operation of the switch and an independent power distribution system to
supply power to the 48 copper Ethernet ports, supporting the IEEE 802.3af standard for Power over
Ethernet (PoE). Connect only powered devices that adhere to IEEE 802.3af.
fn00158s50N-DC
10-Gigabit Modules or Stacking Modules (optional).
Optical ports numbered from left to right.
DC2
Ground Connector
DC1
FG
-48V
RTN
-48V
Label (Part #, Serial #, MAC Address, Bar Code, FRU #)
Ethernet Port Numbers
49 to 52, Right to Left
FG
-48V
RTN
-48V