EPS 2011-04

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Installing and Connecting the HP Redundant / External Power Supplies

Recommended Connection Topologies

Status Indication

The Power Status LEDs on the HP 620 RPS/EPS indicate if a port can provide

power. For example, if two switches are connected to the HP 620 RPS/EPS

and the power to the switch on port 2 fails, the Power Status LED for port 2

turns on. The Power Status LED for port 1 remains off.

EPS Connections on the HP 620 RPS/EPS

Recommendations

The HP 620 RPS/EPS is designed to provide primary or backup power to up

to two HP PoE switches. In the following illustration, two HP 3500yl switches

are being supplied with external PoE power from an HP 620 RPS/EPS. The

switches provide PoE power to Ethernet devices connected to their ports.

Figure 5-19. Connecting EPS to 2, 2- port switches

Limitations

In the illustration above, the maximum power that can be provided to each

switch is 398 watts.

UPS Support

The HP 620 RPS/EPS may be used in configurations where an Uninterruptible

Power Supply (UPS) is desired. See Appendix A, “Specifications,” for the

power requirements of the HP 600 RPS/EPS for use in determining your UPS

requirements.

HP 620 RPS/EPS

HP 3500yl switches

EPS

cables