Alcatel 7750 SR-12, Installation Manual

Page: 77 / 158

Installing Power Supplies
7750 SR-12
Page 75
If you intend to use AC power rectifiers to convert AC power, observe the following guidelines:
• There are no AC power cord receptacles on the 7750 SR-12 chassis. AC power must be
converted to usable DC input power by connecting an external rectifier to the terminal
studs on the PEM(s).
• External AC rectifiers must be able to operate with a nominal utility system voltage of
150V to 240V, or operate with input voltages ranging from 150 to 264 VAC.
• The number of AC power shelves and rectifiers depend on your configuration of IOMs
and MDAs, as the cumulative power requirements can vary.
• Appropriate cables are shipped with each 7750 SR-12 router configuration. Make sure all
cables conform to local safety codes.
• Each AC power shelf is connected directly to a DC PEM. Status is supplied through a DB-
25 connection from an AC power shelf to a DC PEM.
• A grounding cable must be connected to provide a ground connection from the power
shelf to the equipment rack and the 7750 SR-12 router.
For a listing of the electrical specifications for the AC-input power supply, see Power Module
Specifications on page 36 .