Juniper SRX5800 Hardware Manual page 302

To upgrade a services gateway that has four standard-capacity DC power supplies to two or four
high-capacity DC power supplies:
1. Ensure that the services gateway is running Junos OS Release 12.1X44-D10 or later. Earlier Junos OS
releases do not support high-capacity DC power supplies.
2. If you have not already done so, replace both standard-capacity fan trays with high-capacity fan trays.
Also replace the standard-capacity air filter with a high-capacity air filter. For more information, see
"Replacing an SRX5800 Services Gateway Fan Tray" on page 268
Gateway Air Filter" on page
3. Check the LEDs on all four power supply faceplates to ensure that they are operating properly.
4. Remove the standard-capacity power supply from slot PEM0. See
Gateway DC Power Supply" on page 287
5. Install a high-capacity DC power supply in the PEM0 slot in the back of the chassis. See
SRX5800 Services Gateway DC Power Supply" on page 290
supplies.
6. Repeat Step 4 and Step
high-capacity DC power supply.
7. Check the LEDs on the faceplate of each of the new power supplies to confirm that they are operating
properly.
8. Remove the two standard-capacity power supplies from the PEM2 and PEM3 slots. See
SRX5800 Services Gateway DC Power Supply" on page 287
supplies.
9. If you are upgrading to four high-capacity DC power supplies to achieve 2+2 redundancy, install
high-capacity DC power supplies in the PEM2 and PEM3 slots. See
Gateway DC Power Supply" on page 290
10. Check the LEDs on the faceplate of each of the new power supplies to confirm that they are operating
properly.
274.
for instructions on removing DC power supplies.
5 to replace the standard-capacity DC power supply in the PEM1 slot with a
for instructions on installing DC power supplies.
and "Replacing the SRX5800 Services
"Removing an SRX5800 Services
for instructions on installing DC power
for instructions on removing DC power
"Installing an SRX5800 Services
303
"Installing an
"Removing an