Juniper EX4500-40F-BF, Complete Hardware Manual, Page: 164 / 294

NOTE: A 1200 W DC power supply requires a dedicated 30 A circuit breaker
for each input DC feed.
NOTE: Each power supply input feed must be connected to a dedicated DC
power source outlet.
Before you begin connecting DC power to the switch:
• Ensure that you have taken the necessary precautions to prevent ESD damage (see
“Prevention of Electrostatic Discharge Damage” on page 250 ).
•
Ensure that you have connected the switch chassis to earth ground.
CAUTION: To meet safety and electromagnetic interference (EMI)
requirements and to ensure proper operation, you must connect EX4500
switches to earth ground before you connect them to power. For
installations that require a separate grounding conductor to the chassis,
use the protective earthing terminal on the switch chassis to connect to
earth ground. For instructions on connecting an EX4500 switch to ground
using a separate grounding conductor, see
“Connecting Earth Ground to
an EX Series Switch” on page 137 .
• Install the power supply in the chassis. See “Installing a DC Power Supply in an EX4500
Switch” on page 124 .
Ensure that you have the following parts and tools available to connect DC power to the
switch:
•
Electrostatic discharge (ESD) grounding strap
•
DC power source cables (not provided) with the cable lugs (Molex 190410014 or
equivalent) (not provided) attached
• Phillips (+) screwdriver, number 2
•
Multimeter
WARNING: Ensure that the power cords do not block access to switch
components or drape where people can trip on them.
To connect DC power to the switch:
1.
Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and
connect the strap to the ESD point on the chassis.
2.
Remove the plastic cover from the DC power input terminal block by sliding it off either
to the left or right. Save this cover for future use. See
Figure 48 on page 147 .
Copyright © 2015, Juniper Networks, Inc. 146
Complete Hardware Guide for EX4500 Ethernet Switches