Maintaining the Power Supplies on the SRX3400 Services Gateway

To maintain the power supplies, follow these guidelines:

To check the status of the power supplies, issue the show chassis environment pem command. The output is similar to the following:
user@host> show chassis environment pem
```
PEM 0 status:
  State                      Online
PEM 1 status:
  State                      Online
```
Make sure that the power and grounding cables are arranged so that they do not obstruct access to other services gateway components.
Routinely check the PWR status LED on the SFB faceplate. If this LED is solid green, the power supplies are functioning normally.
Periodically inspect the site to ensure that the grounding and power cables connected to the services gateway are securely in place and that there is no moisture accumulating near the services gateway.

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