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Poe+ switches, Figure 14: example of one poe+ switch – Allied Telesis AT-RPS3000 User Manual

Page 30

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Chapter 1: Overview

30

PoE+ Switches

Here is an example of the AT-RPS3000 Chassis supporting a single PoE+
switch, the AT-x610-24Ts/X-POE+ Switch. Notice that the switch is
connected to RPS 2 PoE+/System port on the chassis so that it receives
both system and PoE+ power from the power module in slot A. It would
receive only system power if it was connected to RPS 1 System port.

Figure 14. Example of One PoE+ Switch

The active source of system power for the switch is its internal, removable
power supply. This is in keeping with the rule that PoE+ switches gain their
system power from their internal power supply, and use the power supply
in the AT-RPS3000 Chassis as a redundant supply for system power.

It is important to note, however, that the principal of active and redundant
system power does not apply to PoE+ power because the AT-RPS3000
Chassis supplements the PoE+ power from the switch’s internal power
supply, thus allowing for more powered devices on the switch.

The AT-PWR800 and AT-PWR1200 Modules can provide PoE+ power to
just one switch at a time. Consequently, the chassis must have a second
module if it is to support two PoE+ switches. In Figure 15 on page 31, the
AT-x610-24Ts/X-POE+ and AT-x610-48Ts/X-POE+ Switches receive
redundant system power and additional PoE+ power from the modules in
slot A and B, respectively.

B

B

1

2

3

4

SYSTEM

PoE+ / SYSTEM

PoE+ / SYSTEM

SYSTEM

MODULE B

MODULE A

A

A

A

T

-PWR

8

00

DC OUT

FAULT

100-240 VAC~12A MAX

AT-PNL800/1200

PO

WER SUPPL

Y

RPS
READY

RPS INPUT

12V/21A MAX

WARNING
This unit may have more than one power input. To reduce the risk of
electric shock, disconnect both A/C and RPS inputs before servicing
unit.

A

T

-PWR

8

00

2142

DC OUT

FAULT

100-240 VAC~12A MAX

AT-x610-24Ts/X-POE+ Switch

AT-RPS3000 Chassis

(Low-power)

with One Power Supply

RPS 2

PoE+/System

Port

Slot A

Slot B