Alcatel-Lucent 7450 ESS-7, Руководство по установке

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Chassis Features
Page 30 7450 ESS-7
AC P
OWER
E
NTRY
M
ODULES
Two bays in the rear of the 7450 ESS-7 chassis are designated for swappable, load-sharing power
entry modules (PEM) (
Figure 8 ). One AC PEM and one AC PSM can support the full system
current requirements if you are operating the 7450 ESS-7 without power redundancy. For
redundancy, two AC PEMs and two AC PSMs must be installed and powered on at all times. See
AC Power Supply Modules on page 29 .
AC power cables must be compliant with your local safety codes. There are no field replaceable
parts. The entire unit must be replaced in the event of a failure.
The associated LED on the SF/CPM faceplate indicates normal online (green), fault (red), or
offline (not lit) power conditions. A circuit breaker integrated into the AC PEM provides over-
current protection.
Power can be removed with the circuit breaker (ON/OFF) on each AC PEM.
Figure 8: 7450 ESS-7 AC Power Entry Module (PEM)
SR70023