NEC NEAX 2000 IPS Installation Manual page 86

<–48 V DC Power Supply System>
1. When the operating power is being supplied to the PZ-PW135 card, do not plug/unplug this
circuit card into/from its mounting slot.
2. When the system is configured with two or more PIMs, the BUS cable is providing gang con-
trol for the PZ-PW135 card of PIM0 and other PIMs. Therefore, if the power of PIM0 is off,
no power is supplied to the whole system even when the power switch(es) of other PIMs are
left on.
3. Do not turn off the PZ-PW135 card on PIM1 to PIM7 when the system is operating.
(1) Check the switch position of each PZ-PW135 card before turning power on.
(2) Turn the SW1 switches of all the PZ-PW135 cards to ON. First, turn ON PIM1 to PIM7. Then, turn
ON PIM0.
CAUTION
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CHAPTER 2 INSTALLATION
PRECAUTIONS
NWA-008841-001 Rev.5.0
90ch2001.fm