Replace A Dc Power Supply - HP HPE Alletra 2140 Hardware Manual

Table of Contents

Power supply LED

2 Power supply release lever

5. Insert the new PSU. Push in gently until you hear a click.

Do not force the power supply. If it does not slide in properly, remove it and try again.

The DC PSU has an internal fuse for overload protection. In the installation environment:

A 50A circuit breaker is required at the DC mains. Ensure that there is a reliable grounded (earthed) connection before

connecting power.

To disconnect the array from DC power, turn off both branch circuit breakers that supply power to the array PSUs. A

branch circuit breaker must be provided as part of the installation environment.

6. Attach the power connections to the PSU.

a) Push the power supply release lever to the left, grasp the handle, and pull the power supply out several inches to access

the connector cover.

b) Remove the connector cover from the PSU.

c) Using the connector screws of the DC PSU, attach the two wires for your DC mains to the connections labeled + (RTN)

and - (-48V). Maximum torque is 8.6 in-lbs (0.98 N-m).

Use 6-gauge wire (6 AWG) or larger and UL-certified connectors. For power supply connections, use wires suitable for

at least 90° C (194° F).

d) Return the connector cover to its position on the PSU.

e) Return the power supply to its position.

7. Attach a grounding cable to the PSU using the ground screw on the front of the PSU. Maximum torque is 8.6 in-lbs (0.98

N-m).

8. Connect PSU ground cable and power cables to the DC mains.

Power is automatically restored to the PSU when the connection is made and the DC mains are turned on.

9. After no more than two minutes, verify that the LED on the PSU is lit and appears solid green.

If the LED does not stop blinking and go solid green, check the connection to the power source. If that does not work,

contact HPE Support.

10. Repeat steps 3 through 9 for the second DC PSU.