Hardware Description 35
The Stacking LEDs are numbered 1- 8. Each stacking unit has one stacking LED lit, indicating its Unit
ID number. If either Stacking LED 1 or 2 is lit, it indicates that the device is either the Stack Master or
Backup Master.
Table 2-6. Stacking LED Indications
Power Supplies
The device has an internal power supply unit (AC unit) and a connector to connect PowerConnect
3524/P and PowerConnect 3548/P devices to a PowerConnect EPS-470 unit, or to connect
PowerConnect 3524 and PowerConnect 3548 devices to a PowerConnect RPS-600 unit.
ThePowerConnect 3524/P and PowerConnect 3548/P devices have an internal power supply (12 Volt).
Operation with both power supply units is regulated through load sharing. Power supply LEDs indicate
the status of the power supply.
The PowerConnect 3524/P and PowerConnect 3548/P devices have an internal power supply of 470W
(12V/-48V), with a total of 370W for 24 ports PoE device.
AC Power Supply Unit
The AC power supply unit operates from 90 to 264 VAC, 47 to 63 Hz. The AC power supply unit uses a
standard connector. LED indicator is on the front panel and indicates whether the AC unit isconnected.
DC Power Supply Unit
The PowerConnect 3524 and PowerConnect 3548 switches connect to an external RPS-600 unit to
provide a redundant power option. No configuration is required. The front panel "RPS" LED indicates
whether the external RPS-600 is connected. See Table2-5 for RPS LED definition.
The PowerConnect 3524/P and PowerConnect 3548/P switches connect to an external EPS-470 unit to
provide a redundant power option. No configuration is required. The front panel "RPS" LED indicates
whether the external EPS-470 is connected. See Table2-5 for RPS LED definition.
LED Color Description
All Stacking LEDs OFF The switch is currently a stand-alone device.
Stacking LED 1-8 (S1-S8) Green Static The device is designated as Stacking Unit N.
OFF The device is not designated as Stacking Unit N.
Stacking Master LED Green Static The device is the Stack Master
OFF The device is not the Stack Master.