Figure 197: Removing a DC Power Supply
WARNING: Do not touch the power connectors on the rear of the power
supply (see Figure 198 on page 383). They can contain dangerous voltages.
Figure 198: Rear of the Power Supply Showing Midplane Connectors
Installing a T640 Six-Input DC Power Supply
Each DC power supply weighs approximately 39.7 lb (18.0 kg). To install a six-input DC
power supply:
1. Make sure that the voltage across the DC power source cable leads is 0 V and that
there is no chance that the cables 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.
383Copyright © 2017, Juniper Networks, Inc.
Chapter 29: Replacing Power System Components
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