44 Dell PowerConnect 55xx Systems User Guide
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Contax\CxUGHardware.fm
DELL CONFIDENTIAL – PRELIMINARY 9/11/12 - FOR PROOF ONLY
SFP LEDs
The SFP+ ports each have two LEDs, marked as LNK and ACT, associated
with them. Figure 3-5 describes these LEDs.
Stack ID LED
The front panel of the device contains a Stack ID panel used to display the
Unit ID for the Stack Master and members, as shown in Figure 3-2.
Power Supplies
The device has an internal power supply unit (AC unit) and a connector to
connect PowerConnect 5500/P devices to a PowerConnect EPS-470 unit, or
to a PowerConnect MPS-600 unit.
The PowerConnect 5500/P devices have the following internal power
supplies:
• 24 Port non-PoE devices —
54 Watt
.
• 48 Port non-PoE devices —
100 Watt
.
• 24/48 Port PoE devices —
600 Watt
.
Operation with both power supply units is regulated through load sharing.
Power supply LEDs indicate the status of the power supply.
The AC power supply unit operates from 90 to 264 VAC, 47 to 63 Hz. The AC
power supply unit uses a standard connector. A LED, shown in Figure 3-3,
indicates whether the AC unit is connected.
When the device is connected to a supplementary power source, the
probability of failure in the event of a power outage decreases.
Table 3-5. SFP Port LEDs
LED Color Description
LNK Solid green Link is at highest speed.
Solid amber Link is at lowest speed.
Off Port is currently not linked.
ACT Flashing green Port is either transmitting or receiving.
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