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Installing and Removing Power Components
Step 8
Turn the facility breaker to the OFF position.
Step 9
Repeat Step 7 and 8 and for each of the remaining five DC inputs on the upper power shelf (PS0).
Step 10
Repeat Step 7 and 8 for each of the six DC inputs on the lower power shelf (PS1).
Step 11
Turn the facility power breakers for the upper (PS0) and lower (PS1) power shelf to the ON position.
Step 12
Turn the upper power shelf (PS0) I/O switch to the ON position. Verify that the "CBREAKER TRIP" LED on the front
panel of each DC PEM is yellow and that no other LEDs are active.
Step 13
Turn the first PEM (A0) I/O switch on the upper power shelf (PS0) to the ON position. Verify that the "PWR OK"
LED on the DC PEM front panel is green and that no other LEDs are active. Repeat for the other two PEMs (A1 and
A2).
Step 14
Turn the lower power shelf (PS1) circuit breaker to the ON position. Verify that the "CBREAKER TRIP" LED on the
front panel of each DC PEM is yellow and that no other LEDs are active.
Step 15
Turn the first PEM (B0) I/O switch on the lower power shelf (PS1) to the ON position. Verify that the "PWR OK"
LED on the DC PEM front panel is green and that no other LEDs are active. Repeat for the other two PEMs (A1 and
A2).
See
Figure 17: LCC Front (PLIM) Side Slot Numbers, on page 35
Step 16
Turn the I/O switches on all PEMs and both power shelves to the OFF position. Verify that no LEDs on the PEMs are
active.
Step 17
Insert all boards into the chassis (For more information, Installing and Removing Line Cards, PLIMs, and Associated
Components chapter).
Step 18
Turn the power shelf I/O switches (PS0 and PS1) to the ON position.
Step 19
Turn all DC PEM I/O switches to the ON position.
Step 20
Measure the input voltage of each input and compare this value to the voltage measurement noted in Step 7. Verify
that the equipment is still receiving the correct input voltage measured in Step 7.
What to do next
Note
For appropriate MSC, RP, or PLIM LED information, see the appropriate section in Installing and Removing
Line Cards, PLIMs, and Associated Components or the specific documentation for the card.
To power down the chassis entirely, you must power down both of the power shelves by moving the power
shelf power switch to the OFF position by lifting up on the lever and pulling it out. Both power shelves must
be disconnected to de-energize the chassis completely.
This table shows the meaning of the LED status lights on the DC PEMs.
Table 4: Fixed Configuration DC PEM LED Status Indicator Lights
LED Name
PWR OK
FAULT
DC INPUT FAIL
Color
Function or Meaning
Green
PEM is operating normally in a powered up condition.
Yellow
Fault has been detected within the PEM.
Yellow
DC input is out of range or is not being provided to the PEM.
figure for reference.
Installing and Removing Power Components
Steps
41
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