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14-Slot AdvancedTCA Shelf
11596-100/-101/-102/-103
4.4 Power Entry Module (PEM) Replacement
Hazardous voltage!
Before disconnecting the power cables ensure that the power is removed from
the power cables. When the system is powered on, do NOT touch the power
terminals!
Warning!
This Shelf is intended to be grounded. Ensure that the Shelf Ground terminals
are connected to Protective Earth (PE) of the building.
Warning!
Although there are fuses in the power entry circuit of the Shelf, the power lines
have to be protected on rack level with 30 A breakers.
Warning!
Remove jewelry (rings, watches...) before working on equipment that is
connected to power lines!
Warning!
Before removing a PEM, make sure that the Power Segments of the other
PEM are fully functional.
Danger of electrostatic discharge!
Static electricity can harm delicate components inside the Shelf. You must
wear an ESD wrist strap before exchanging any part or electric component!
Caution!
To maintain proper airflow, do not leave a PEM slot open.
Under normal operation, the green OK LED on the PEM is lit, indicating that
there is supply voltage on all power feeds and the PEM is fully functional.
When the red Failure LED lights up, there is either a supply voltage missing, a
fuse blown or the PEM not working. Before replacing a PEM, check if all power
feeds are present at the PEM connector.
www.a-tca.com / www.schroff.biz
25
Maintenace
R1.1, July 23, 2008
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