Juniper MX2010 Hardware Manual page 321

You connect DC power to the router by attaching power cables from the external DC power sources to
the terminal studs on the PDM faceplates. You must provide the power cables (the cable lugs are not
supplied with the router).
To connect the DC source power cables to the router:
1. Switch off the dedicated customer-site circuit breakers. Ensure that the voltage across the DC power
source cable leads is 0 V and that there is no chance that the cable leads might become active during
installation.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
NOTE: If the PSMs are installed in the router, make sure that the power switches on all
PSMs are turned to the off (O) position.
3. Move the DC circuit feed switch on the PDM faceplate to match the current rating amperage—60 A
or 80 A—for each feed.
NOTE: The switch position applies to all inputs of this PDM. Selecting the 60 A position
might reduce power output capacity available from each PSM.
NOTE: The type of feed that you use on the DC PDM (60 A or 80 A) depends on the
distribution scheme and distribution equipment. With a 60-A feed, the maximum power
supply output power is limited to 2100 W while the maximum power supply input power
is limited to 2400 W. With an 80-A feed, the maximum power supply output is limited to
2500 W while maximum power supply input power is limited to 2800 W. The system
power management software calculates the available and used power based on DIP switch
positions in the PDM.
4. Loosen the captive screws on the plastic cable restraint on the lower edge of the power faceplate. The
cable restraint is set on hinges that hold the cover in place during cable installation.
NOTE: You can remove the plastic cover for DC power cable installation by bending the
plastic cable restraint cover until the two plastic pins on both sides of the housing unhinge.
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