Juniper Networks MX480 - Manual (Page 137)

Figure 70: Connecting DC Power to the Router
Powering On a DC-Powered MX480 Router
To power on a DC-powered router:
1. Verify that an external management device is connected to one of the Routing Engine
ports (
AUX , CONSOLE , or ETHERNET ).
2. Turn on the power to the external management device.
3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
4. Verify that the power supplies are fully inserted in the chassis.
5. Verify that the source power cables are connected to the appropriate terminal: the
positive (+) source cable to the return terminal (labeled
RETURN ) and the negative
(–) source cable to the input terminal (labeled –48V ).
6. Switch on the dedicated customer site circuit breakers to provide power to the DC
power cables.
7. Check the INPUT OK LED is lit steadily green to verify that power is present.
8. If power is not present:
• Verify that the fuse is installed correctly and turn on the breaker at the battery
distribution fuse board or fuse bay.
• Check the voltage with a meter at the terminals of the power supply for correct
voltage level and polarity.
9. On each of the DC power supplies, switch the DC circuit breaker to the center position
before moving it to the on (
— ) position.
113 Copyright © 2013, Juniper Networks, Inc.
Chapter 10: Grounding and Providing Power to the MX480 Router