General Architecture

15

Table 2 describes typical equipment configurations and specifications of external PoE power system.

Table 2 Typical equipment configurations and specifications of external PoE power system

Item

Description

 

 

Physical dimensions (H x W x D)

177 x 486 x 320.5 mm (7.0 x 19.1 x 12.6 in.)

System controller

One

Rectifier

Two NP2500UAC (required) + one redundant

 

NP2500UAC (optional)

AC accessory

Three AC inputs and switches

 

Three-phase AC voltage detection circuit

 

Input voltage range: 90 to 290 VAC; rated voltage

 

and current: 250 VAC, 20 A

DC accessory

A single DC output, with max output current of

 

93 A

Max power consumption

4500 W

 

 

The external PoE power system has monitor function. It provides one system monitoring module, one RS232 and two RS485 monitoring interfaces. The system monitoring module reports the running information of the PSUs in the system to a fabric through RS232 or RS485 interface and indicates alarm status by the alarm LED (ALM). You can connect cables to the interfaces from the front as well as the rear of the frame.

n

The external PoE power system for the Switch 8800 Family only supports the

RS485 monitoring interface.

 

Table 3 LEDs of external PoE power system

 

 

 

Normal

Abnormal

 

LED

Label

Color

state

state

Abnormal reason

 

 

 

 

 

 

Input power LED

AC

Green

ON

OFF

Loss of AC input power, or blown

 

 

 

 

 

fuse

Output power LED

DC

Green

ON

OFF

No DC output from PSU

Fault LED

Fault

Red

OFF

ON

Irreversible fault occurred in PSU

Running status LED

RUN

Green

ON

OFF

PSU shutdown or PSU running

 

 

 

 

 

trouble

Alarm LED

ALM

Red

OFF

ON

Loss of AC input power,

 

 

 

 

 

under-voltage or over-voltage

 

 

 

 

 

input, under-voltage or

 

 

 

 

 

over-voltage output, or PSU fault

 

 

 

 

 

 

MBUS Introduction

The MBUS is a service-independent maintenance and test bus. No service traffic goes through the MBUS. The shutdown and reset of the MBUS does not affect the services on the switch, and faults that have occurred on modules do not affect the MBUS.

Through the MBUS, the system instructs the MBUS modules on individual cards to power on/off the cards one by one in turn, thus prevent power surging. The MBUS module software must support online upgrade.

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3Com 8807, 8814, 8810 manual Mbus Introduction, Normal Abnormal, Label Color State Abnormal reason

8810, 8814, 8807 specifications

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