2-16
Installing the Switch
Installation Procedures
Installing the Switch
9. Connect a 620 Redundant Power Supply
to the switch (Optional)
The HP ProCurve 620 Redundant and External Power Supply, (J8696A),
hereafter referred to as the 620 RPS/EPS, is an accessory product for the 3500,
3500yl and 6200yl switches and specific other HP ProCurve switches. The 620
RPS/EPS provides two types of power to the switches:
■ Redundant power to two switches, to back up the internal switch power
supply in case of AC power loss, or a fault condition. Should the internal
switch power supply fail, power will be supplied from the 620 RPS/EPS.
■ External Power-over-Ethernet (PoE) power to up to two switch products.
The 620 RPS/EPS can supply 398 watts of PoE power to the switch if the
internal PoE power supply should fail. For the 3500yl-48G-PWR and 3500-
48-PoE switches, the external PoE power is additional power made
available to the switch’s ports. For further information regarding the 620
RPS/EPS PoE capabilities, see the HP ProCurve Power over Ethernet
(PoE) Planning and Implementation Guide and the HP ProCurve 620
Redundant and External Power Supply Installation and Getting Started
Guide, which are on the HP ProCurve Web site at www.procurve.com/
manuals.
The 620 RPS/EPS is an unmanaged power supply that only provides informa-
tion by way of LEDs.
RPS/EPS Operation
The RPS/EPS monitors the power signal from the switch by detecting that the
RPS/EPS is connected to a valid switch with an RPS/EPS cable. When the
power from the switch is no longer detected, the RPS/EPS will turn on and
provide power to the switch within 1 millisecond.
The RPS/EPS supports hot plugging of the RPS cable only, Hot disconnect of
the EPS (PoE power) cable is not supported, and could cause loss of power
to the switch. The EPS cable can be connected at any time. The RPS/EPS unit
must be powered down in order to unplug the EPS (PoE power) cable, if power
is flowing.
Operating Characteristics of the 620 RPS/EPS (J8696A)
The 620 RPS/EPS has two RPS ports, each of which can provide redundant
+12V power to a connected switch. If a switch with no AC power is connected
to an operating 620 RPS/EPS, it will not receive power. The switch must first
be powered on, then connected to the 620 RPS/EPS.
