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HP ProCurve 2910al Switch Series - Connect the Switch to a Power Source

Connecting the switch to a power source

  1. Plug the included power cord into the switch’s power connector and into a nearby AC power source.

  2. Re-check the LEDs during self test.

  3. Also check the LEDs for any accessories that may have been installed.


Connecting an external power supply (Optional)

The ProCurve 620 Redundant and External Power Supply (J8696A), referred to as the 620 RPS/EPS, is an accessory product for the 2910al switches and specific other ProCurve switches. The 620 RPS/EPS provides two types of power to the switches, however the 2910 switches do not use the PoE power (EPS) portion of the 620 RPS/EPS.

These switches support the RPS or redundant portion of the 620 RPS/EPS. Redundant power to one of up to two switches can be supplied to back up the internal switch power supply in case of the internal power supply fails. Should the internal switch power supply fail, power will be supplied from the 620 RPS/ EPS.

The 620 RPS/EPS is an unmanaged power supply that only provides information by way of LEDs.

RPS operation

The RPS portion of the 620 RPS/EPS monitors the power signal from the switch by detecting that the 620 RPS/EPS is connected to a switch with an RPS cable. When the power from the switch is no longer detected, the 620 RPS/EPS will provide power to the switch within 1 millisecond.

The 620 RPS/EPS supports hot plugging of the RPS cable without causing a reboot of the switch or causing the power supply in either the 620 RPS/EPS or switch to shut down temporarily or permanently.

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 receive power.

The 620 RPS/EPS also has two EPS Ports which can not be used with the 2910al switches.

For redundant AC power, connect the 620 RPS/EPS to the switch using one of the supplied RPS cables. RPS cables are 2 meters (6.56 feet) in length.


The 620 RPS/EPS LEDs are located on the front and back of the device. There are two dual colored (green/orange) LEDs for each RPS and EPS port:

  • Device connected

  • Power status

Figure 1: Back of 620 RPS/EPS

1 - RPS port LEDs
2 - EPS port LEDs
3 - EPS ports, not used
4 - RPS ports
State and Meaning
Power (green)
  • The unit is powered on.

  • The unit is NOT powered on.

Fault (orange)
  • The normal state; indicates that there are no fault conditions on the unit.

Blink orange 1,3 :
  • A fault has occurred on the unit, one of the ports, or the fan. The Status LED for the component with the fault will blink simultaneously.

  • On briefly after the unit is powered on or reset, at the beginning of unit self test. If this LED is on for a prolonged time, the unit has encountered a fatal hardware failure, or has failed its self test.

Temp Status (green and orange)
  • The temperature of the unit is within specification.

Blink orange 2 :
  • One of these conditions exists:

    • A cooling fan has failed. The unit Fault LED and Fan Status LED will be blinking simultaneously.

    • There is an over temperature condition in the unit. The unit Fault LED is off.

Fan Status (green and orange)
  • The cooling fans are operating normally.

Blink orange 1 :
  • A cooling fan has failed. The unit Fault LED will be blinking simultaneously.

Device Connected (green–over-laid with the port number)
  • There is a valid connection to a device.

  • There is no valid device connected to the port.

Power Status (green and orange)
  • The unit is supplying power to a connected device.

  • One of these conditions exists:

    • There is no connected device.

    • A connected RPS device does not require power.

    • A connected EPS device has not successfully communicated for EPS power.

Blink orange 1 :
  • One of these conditions exists:

    • On the 620 RPS/EPS, RPS power is not available to the connected device because there is a hardware or power supply failure in the 620 RPS/EPS unit.

    • When the LED is blinking simultaneously with the Fault LED, there is a fault condition on the port.

Port Status (also on back panel of the 620 RPS/EPS)
NOTE: 1: The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.

2: The blinking behavior is an on/off cycle once every 0.8 seconds, approximately.

3: Specific fault conditions can be viewed by checking switch log files.

620 RPS/EPS connectivity

The 620 RPS/EPS can provide backup power support for up to two ProCurve switches. In fig 2 shown below, two ProCurve Switch 2910s are connected to the RPS ports on a 620 RPS/EPS.

Figure 2: Connecting RPS to 2 switches


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