Juniper SRX5400 Hardware Manual page 358

If a DC power supply is correctly installed and functioning normally, the PWR OK, BREAKER ON, and
INPUT OK LEDs light steadily.
Issue the CLI show chassis environment pem command to check the status of installed power supplies.
As shown in the sample output, the value Online in the rows labeled State indicates that each of the
power supply is functioning normally:
user@host> show chassis environment pem
PEM 0 status:
State
Temperature
DC Input:
DC Output
Voltage:
48.0 V input
PEM 1 status:
State
PEM 2 status:
State
Temperature
DC Input:
DC Output
Voltage:
48.0 V input
PEM 3 status:
State
If a power supply is not functioning normally, perform the following steps to diagnose and correct the
problem:
If a major alarm condition occurs, issue the show chassis alarms command to determine the source of
the problem.
Check that the AC input switch (—) or DC circuit breaker (|) is in the on position and that the power
supply is receiving power.
Verify that the source circuit breaker has the proper current rating. Each power supply must be connected
to a separate source circuit breaker.
Verify that the AC power cord or DC power cables from the power source to the services gateway are
not damaged. If the insulation is cracked or broken, immediately replace the cord or cable.
Online
OK
OK
Voltage(V) Current(A)
52 8
52000 mV
Empty
Online
OK
OK
Voltage(V) Current(A)
53 10
53000 mV
Empty
Power(W) Load(%)
416 17
Power(W) Load(%)
530 21
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