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Steps
5.
6.
7.
8.
9.
10.
11.
12. Turn the upper power shelf (PS0) I/O switch to the ON position. Verify that the "CBREAKER TRIP"
13. Turn the first PEM (A0) I/O switch on the upper power shelf (PS0) to the ON position. Verify that the
14. Turn the lower power shelf (PS1) circuit breaker to the ON position. Verify that the "CBREAKER
15. Turn the first PEM (B0) I/O switch on the lower power shelf (PS1) to the ON position. Verify that the
16. Turn the I/O switches on all PEMs and both power shelves to the OFF position. Verify that no LEDs
17.
18. Turn the power shelf I/O switches (PS0 and PS1) to the ON position.
19. Turn all DC PEM I/O switches to the ON position.
20. Measure the input voltage of each input and compare this value to the voltage measurement noted in
DETAILED STEPS
Step 1
Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection sockets on the
front (PLIM) side of the chassis or a bare metal surface on the chassis.
Step 2
Verify that the safety ground wiring is connected to the upper (PS0) and lower (PS1) power shelves.
Step 3
Make sure that the facility power breakers for the upper (PS0) and lower (PS1) power shelves are in the OFF position.
Step 4
Make sure all the I/O switches are in an OFF position. That is, make sure all power levers are pulled out. There are
total of six power levers for the DC PEMs (one for each of the six DC PEMs) and two power levers for the DC power
shelves (one for each power shelf).
Step 5
Make sure all boards (RPs, PLIMs, Line Cards, and FCs) are pulled-out and disconnected from the backplane.
Step 6
Energize the facility breaker to PEM 0, input 1 on the upper power shelf, PS0.
Caution
Make sure that the polarity of the DC input wiring is correct.
This is a positive ground system; make sure to connect the positive lead to the +RTN terminal and the negative
Caution
lead to the –48V terminal.
Step 7
Measure the voltage at the input terminal block and verify that the DC voltage between the positive and negative
terminals is between 42 VDC and 72 VDC. Make a note of this voltage measurement.
Installing and Removing Power Components
40
Make sure all boards (RPs, PLIMs, Line Cards, and FCs) are pulled-out and disconnected from the
backplane.
Energize the facility breaker to PEM 0, input 1 on the upper power shelf, PS0.
Measure the voltage at the input terminal block and verify that the DC voltage between the positive and
negative terminals is between 42 VDC and 72 VDC. Make a note of this voltage measurement.
Turn the facility breaker to the OFF position.
Repeat Step 7 and 8 and for each of the remaining five DC inputs on the upper power shelf (PS0).
Repeat Step 7 and 8 for each of the six DC inputs on the lower power shelf (PS1).
Turn the facility power breakers for the upper (PS0) and lower (PS1) power shelf to the ON position.
LED on the front panel of each DC PEM is yellow and that no other LEDs are active.
"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).
TRIP" LED on the front panel of each DC PEM is yellow and that no other LEDs are active.
"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).
on the PEMs are active.
Insert all boards into the chassis (For more information, Installing and Removing Line Cards, PLIMs,
and Associated Components chapter).
Step 7. Verify that the equipment is still receiving the correct input voltage measured in Step 7.
Installing and Removing Power Components
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