Alcatel 7750 SR-12, Installation Manual

Page: 139 / 158

Appendix B: Field Replaceable Units
7750 SR-12
Page 137
P
OWER
M
ODULES
This section covers:
• Removing a DC PEM on page 139
• Replacing a DC PEM on page 141
• AC Power Shelves and Rectifiers on page 143
• Disconnecting AC Power Cables on page 143
W
ARNINGS AND
N
OTES
Danger:
• Only trained and qualified personnel should install or replace this equipment and connect the
power cables.
• Even though the power supply modules are hot swappable, for extra safety, you can turn off power
at the power source and disconnect and unplug the power cables before you remove and replace a
power supply module.
• You must use power cables which meet local electrical code requirements.
Warning:
• Do not install equipment that appears to be damaged.
• Blank panels and faceplates are required in all empty component slots to prevent excess dust
accumulation and to help control airflow and electromagnetic interference. Faceplate blanks do
not have board components or connector pins.
• The 7750 SR-12 router with DC PEMs should be installed only in restricted access areas (such as
dedicated equipment rooms and electrical closets) in accordance with Articles 110-26 and 110-27
of the most recent National Electrical Code ANSI/NFPA 70.
• Electrostatic discharge (ESD) damage can occur if components are mishandled. Always wear an
ESD-preventive wrist or ankle strap and always connect an ESD strap to the grounding plug on
the front of the chassis.