HP E2620, Installation And Getting Started Manual

Page: 44 / 116

2-20
Installing the Switch
Installation Procedures
RPS/EPS Operation
The RPS/EPS monitors the power signal from the switch by detecting that the
RPS/EPS is connected to a switch with an RPS/EPS cable. When the power
from the switch is no longer detected, the RPS/EPS will provide power to the
switch within 1 millisecond.
The RPS/EPS supports hot plugging of the RPS/EPS cable without causing a
reboot of the switch or causing the power supply in either the RPS/EPS or
switch to shut down temporarily or permanently. For more information refer
to the documentation that came with the RPS/EPS.
Operating Characteristics of the external power supplies
The 600 external power supply has six RPS ports, the 620 RPS has two RPS
ports, and the 630 external power supply has one RPS port, each of which can
provide red12V power to a connected switch. If a switch with no AC
power is connected to an operating external power supply, it will not receive
power. The switch must be initially powered on using AC power before
external power supply will provide RPS power.
The 600 and 620 external power supplies can not be used by the E2620
switches for PoE/PoE+ (EPS) power. The 630 external power supply has one
EPS port and can provide a maximum of 388 watts of PoE/PoE+ power. PoE
power is provided at 50 volts and PoE+ power is provided at 54 Volts.
■ It is important to understand the PoE/PoE+ power requirements of the
switches because if the PoE/PoE+ power is not planned and implemented
correctly the end devices connected to the switch ports may not receive
power if an internal switch PoE/PoE+ power supply should fail. For
further information regarding the external power supply PoE/PoE+ capa-
bilities, see the following manuals:
• HP Power over Ethernet (PoE/PoE+) Planning and Implementation
Guide
• HP Redundant and/or External Power Supply Installation and
Getting Started Guide
These manuals are on the HP Web site at
www.hp.com/networking/support
.
For redundant AC power, connect the external power supply to the switch
using one of the supplied RPS cables. For redundant or additional PoE/PoE+
power, connect the external power supply to the switch using one of the
supplied EPS cables. The RPS and EPS cables are 2.00 meters (6.56 feet) in
length. These cables are identical. If accidentally cross connected, nothing
will happen. No power will flow until properly connected.