Figure 38: Removing The Terminal Block Cover From A Dc Power Supply - Juniper EX3200 Hardware Manual

Copyright © 2017, Juniper Networks, Inc.
To connect DC power to the switch:
Ensure that the power supplies are fully inserted in the chassis and the screws on their
1.
faceplates are tightened.
Ensure that the input circuit breaker is open so that the voltage across the DC power
2.
source cable leads is 0 V and that the cable leads will not become active while you
are connecting DC power.
NOTE: The DC power supply in the switch has four terminals labeled A+,
B+, A–, and B– (see
cables labeled positive (+) and negative (–). The DC power supplies are
shipped with jumpers from A+ input to B+ input tied together and jumpers
from A– input to B– input tied together.
NOTE: The A+ and B+ terminals are referred to as +RTN and A– and B–
terminals are referred to as –48 V in
on page 247
page 242.
Remove the screw securing the terminal block cover using the screwdriver and remove
3.
the terminal block cover (see

Figure 38: Removing the Terminal Block Cover from a DC Power Supply

Remove the screws on the terminals using the screwdriver. Save the screws.
4.
WARNING: Ensure that the power cables do not block access to switch
components or drape where people can trip on them.
Chapter 12: Connecting the Switch to Power
Figure 37 on page 132) for connecting DC power source
"DC Power Wiring Sequence Warning"
and "DC Power Electrical Safety Guidelines for Switches" on
Figure 38 on page 133). Save the screw.
133