Chapter 7 Power System Components And Descriptions; Mx960 Power System Overview - Juniper MX960 Hardware Manual

CHAPTER 7
Power System Components and
Descriptions

MX960 Power System Overview

Copyright © 2017, Juniper Networks, Inc.
MX960 Power System Overview on page 97
MX960 AC Power Supply Description on page 98
MX960 AC Power Supply LEDs on page 103
MX960 DC Power Supply on page 104
MX960 DC Power Supply LEDs on page 105
The MX960 router uses either AC or DC power supplies. The MX960 router is configurable
with three or four normal-capacity AC power supplies, up to four high-capacity DC power
supplies, and up to four high-capacity AC power supplies. The power supplies connect
to the midplane, which distributes the different output voltages produced by the power
supplies to the router components, depending on their voltage requirements.
CAUTION: The router cannot be powered from AC and DC power supplies
simultaneously. The first type of power supply detected by the router when
initially powered on determines the type of power supply allowed by the
router. All installed power supplies of the other type are disabled by the router.
If you install a power supply of the other type while the router is operating,
the router disables the power supply and generates an alarm.
All power supplies are hot-removable and hot-insertable. Each power supply is cooled
by its own internal cooling system.
Unlike systems with previous MX960 AC supplies, the systems with MX Series
high-capacity power supplies are zoned. No current sharing between power supplies is
needed with the upgraded system because the redundancy changes from 3+1 per system
to 1+1 per zone. For MX960 AC configurations, two zones are present. Two adjacent
power supplies need to be installed in the chassis with two feeds attached.
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