NEC UNIVERGE NEAX 2000 IPS, Общее описание устройства

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CHAPTER 2 SYSTEM CONFIGURATION
UNIVERGE NEAX 2000 IPS General Description
Page 32
Issue 5
UNIVERGE
NEAX
2000 IPS SYSTEM POWER SUPPLY
AC/DC Power Supply
The AC/DC Power Card is mounted in the left side of each PIM. The AC/DC Power card
provides power to all circuit cards, which reside in the PIM. AC power requirements are as
follows:
Input Voltage: 90 to 132 Vrms or 180 to 264 Vrms (selectable by switch) 50/60 Hz
DC/DC Power Unit
The DC/DC Power Unit is mounted under the AC/DC Power Card and generates -48 V power for
the circuit cards that need such power.
Battery Backup
Internal Short-term option
For customers requiring battery backup, short-term and/or long-term options are available. Two
3.4AH batteries are required per PIM, and installed inside of each PIM. Backup time is approx.
30 minutes when PHS (Wireless PS) is not accommodated and approx. 10 minutes when PHS
(Wireless PS) is accommodated in the system.
External Long-term option
Two 24AH batteries are required per each 2 PIMs, and installed inside of Battery Module in a
stack basis. Backup time is approx. 3 hours when PHS (Wireless PS) is not accommodated and
approx. 2 hours when PHS (Wireless PS) is accommodated in the system. The batteries are
varied depending on the requested backup time. The battery shall be locally provided.