Figure 49: Securing Ring Lugs To The Terminals On The Dc Power Supply - Juniper EX2200 Series Hardware Manual

Complete Hardware Guide for EX2200 Ethernet Switches
112
To connect DC power to the switch:
Ensure that the input circuit breaker is open so that the cable leads will not become
1.
active while you are connecting DC power.
NOTE: The DC power supply in the switch has four terminals labeled A+,
B+, A–, and B– for connecting DC power source cables labeled
positive (+) and negative (–). The terminals are covered by a clear plastic
cover.
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 189
Grasp the plastic cover in the middle, gently flex it outwards, and pull it out. Save the
2.
cover.
Remove the screws on the terminals using the screwdriver. Save the screws.
3.
WARNING: Ensure that the power cables do not block access to switch
components or drape where people can trip on them.
Connect the power supply to the power sources. Secure power source cables to the
4.
power supply by screwing the ring lugs attached to the cables to the appropriate
terminals by using the screw from the terminals (see

Figure 49: Securing Ring Lugs to the Terminals on the DC Power Supply

DC power terminals:
B+
B- A-
DC power source cable
with lug attached
To connect the power supply to a power source:
Secure the ring lug of the positive (+) DC power source cable to the A+ or B+
a.
terminal on the DC power supply.
"DC Power Wiring Sequence Warning"
and "DC Power Electrical Safety Guidelines" on page
A+
184.
Figure 49 on page 112).
Copyright © 2011, Juniper Networks, Inc.