See the complete EX9204 documentation at
https://www.juniper.net/documentation/product/en_US/ex9204
.
Safety Warnings Summary
This is a summary of safety warnings. For a complete list of warnings, including translations, see the EX9204 documentation
at
https://www.juniper.net/documentation/product/en_US/ex9204
.
WARNING:
Failure to observe these safety warnings can result in personal injury or death.
•
Before removing or installing components of a switch, attach an ESD strap to an ESD point, and place the other end of
the strap around your bare wrist to avoid. Failure to use an ESD strap could result in damage to the switch.
•
Permit only trained and qualified personnel to install or replace switch components.
•
Perform only the procedures described in this quick start and the EX Series documentation. Other services must be
performed only by authorized service personnel.
•
Before installing the switch, read the planning instructions in the EX Series documentation to ensure that the site meets
power, environmental, and clearance requirements for the switch.
•
Before connecting the switch to a power source, read the installation instructions in the EX Series documentation.
•
For the cooling system to function properly, the airflow around the chassis must be unrestricted. Allow at least 6 in.
(15.2 cm) of clearance between side-cooled switches. Allow 2.8 in. (7 cm) between the side of the chassis and any
non-heat-producing surface such as a wall.
•
Installing the EX9204 switch without using a mechanical lift requires three persons to lift the switch onto the mounting
shelf. Before lifting the chassis, remove the components. To prevent injury, keep your back straight and lift with your
legs, not your back. Do not lift the chassis by the power supply handles.
•
Mount the switch at the bottom of the rack if it is the only unit in the rack. When mounting the switch in a partially
filled rack, mount the heaviest unit at the bottom of the rack and mount the others from bottom to top in order of
decreasing weight.
•
When you install the switch, always connect the ground wire first and disconnect it last.
•
Wire the DC power supply using the appropriate lugs. When connecting power, the proper wiring sequence is ground
to ground, +RTN to +RTN, then –48 V to –48 V. When disconnecting power, the proper wiring sequence is –48 V to
–48 V, +RTN to +RTN, then ground to ground.
•
If the rack has stabilizing devices, install them in the rack before mounting or servicing the switch in the rack.
•
Before installing or after removing an electrical component, always place it component-side up on an antistatic mat
placed on a flat, stable surface or in an antistatic bag.
•
Do not work on the switch or connect or disconnect cables during electrical storms.
•
Before working on equipment that is connected to power lines, remove jewelry, including rings, necklaces, and watches.
Metal objects heat up when connected to power and ground and can cause serious burns or become welded to the
terminals.
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