Connecting Dc Power To An Ex3200 Or Ex4200 Switch; Figure 56: Dc Power Supply In An Ex3200 Or Ex4200 Switch - Juniper EX3200 Series Complete Hardware Manual

Connecting DC Power to an EX3200 or EX4200 Switch

Copyright © 2010, Juniper Networks, Inc.
The power supply in an EX3200 or EX4200 switch is a hot-removable and hot-insertable
field-replaceable unit (FRU) located on the rear panel: You can remove and replace it
without powering off the switch or disrupting switch functions.

Figure 56: DC Power Supply in an EX3200 or EX4200 Switch

WARNING: DC-powered EX3200 and EX4200 switches are intended for installation
only in a restricted access location.
Before you begin connecting DC power to an EX3200 or EX4200 switch:
Ensure that you have connected the switch chassis to earth ground.
CAUTION: Before you connect power to the switch, a licensed electrician must attach
a cable lug to the grounding and power cables that you supply. A cable with an incorrectly
attached lug can damage the switch (for example, by causing a short circuit).
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect EX3200 and EX4200 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 the earth ground. For instructions on connecting earth ground, see
"Connecting Earth Ground to an EX Series Switch" on page 141.
Install the power supply in the chassis. For instructions on installing a power supply in
an EX3200 or EX4200 switch, see "Installing a Power Supply in an EX3200 or EX4200
Switch" on page 132.
Ensure that you have the following parts and tools available:
DC power source cables (12–14 AWG) with ring lug (Molex 190700067 or equivalent)
(not provided)
Phillips (+) screwdriver, number 2
Chapter 11: Connecting the Switch
149