Juniper MX960 Hardware Manual page 678

2. Switch on the circuit breaker(s) on the distribution panel to power up the chassis and power supplies.
NOTE:
circuits and therefore does not need to be switched off when restarting the chassis.
NOTE: If output power is not load-balancing correctly in the same zone on an MX960 with a
high-capacity AC or DC power supply module, connect two feeds and change the DIP switch to
1 to boost the voltage on the power supply module.
Each High Capacity AC or DC power supply accepts two AC or DC feeds in two unique AC or DC
receptacles. It is possible to operate with one feed, but there is a reduction in the power supply output.
The DIP switch must be set according to the number of AC or DC feeds that are present for the power
supply.
Figure 246: MX960 AC Power Input Mode Switch
1
0
Position – 0 indicates that only one AC or DC feed is provided.
Position – 1 indicates that two AC or DC feeds are provided.
To check the DIP switch position:
1. Issue the show chassis power command and check to see how many feeds are connected. The following
example shows there are two AC input feeds connected for PEM 0 and one AC input feed connected
for PEM 1. This indicates that the DIP switch for PEM 0 is in position 1 and the DIP switch for PEM 1
is in position 0. These are the proper settings.
The power switch on the power supplies is not part of the outer or inner DC
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