Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.
Statement 19—TN Power Warning
The device is designed to work with TN power systems.
Statement 43—Jewelry Removal Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.
Statement 94—Wrist Strap Warning
During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself.
Statement 1004—Installation Instructions
Read the installation instructions before connecting the system to the power source.
This unit is intended
for installation in restricted access areas. A restricted access area can be
accessed only through the use of a special tool, lock and key, or other means
To avoid electric
shock, do not connect safety extra-low voltage (SELV) circuits to
telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and
WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45
connectors. Use caution when connecting cables.
Statement 1024—Ground Conductor
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.
Statement 1028—More Than One Power Supply
This unit might have more than one power supply connection. All connections must be removed to de-energize the unit.
Statement 1029—Blank Faceplates and Cover Panels
Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place.
Statement 1030—Equipment Installation
Only trained and qualified personnel
should be allowed to install, replace, or service this
Statement 1040—Product Disposal
Ultimate disposal of this product should be handled according to all national laws and regulations.
Statement 1045—Short-circuit Protection
This product requires short-circuit (overcurrent) protection to be provided as part of the building installation. Install only in accordance with national and local wiring regulations.
Statement 1071—Warning Definition
IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You
are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with
electrical circuitry and be familiar with standard practices for
preventing accidents. Use the statement number provided at the
end of each warning to locate its translation in the translated
safety warnings that accompanied this device.
SAVE THESE INSTRUCTIONS
Statement 1074—Comply with Local and National Electrical Codes
Installation of the equipment must comply with local and national electrical codes.
Use the information in
the following sections to help ensure your safety and to protect the chassis.
This information may not address all potentially hazardous situations in your
working environment, so be alert and exercise good judgment at all times.
Observe these safety
Keep the area
clear and dust-free before, during, and after installation.
Keep tools away
from walkways, where you and others might trip over them.
Do not wear loose
clothing or jewelry, such as earrings, bracelets, or chains that could get
caught in the chassis.
glasses if you are working under any conditions that might be hazardous to your
Do not perform any
action that creates a potential hazard to people or makes the equipment unsafe.
Never attempt to
lift an object that is too heavy for one person.
Maintain Safety with
Before working on a
chassis, be sure the power cord is unplugged.
guidelines when working on equipment powered by electricity:
procedures that require access to the interior of the chassis, locate the
emergency power-off switch for the room in which you are working. Then, if an
electrical accident occurs, you can act quickly to turn off the power.
Do not work alone
if potentially hazardous conditions exist anywhere in your work space.
Never assume that
power is disconnected; always check.
for possible hazards in your work area, such as moist floors, ungrounded power
extension cables, frayed power cords, and missing safety grounds.
If an electrical
do not become a victim yourself.
power from the system.
send another person to get medical aid. Otherwise, assess the condition of the
victim, and then call for help.
whether the person needs rescue breathing or external cardiac compressions;
then take appropriate action.
Use the chassis
within its marked electrical ratings and product usage instructions.
Prevent ESD Damage
ESD occurs when electronic components are improperly handled, and it can damage equipment and impair electrical circuitry, resulting in intermittent or complete failure.
ESD-prevention procedures when removing and replacing components. Ensure that
the chassis is electrically connected to an earth ground. Wear an
ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect
the grounding clip to an unpainted surface of the chassis frame to safely
ground ESD voltages. To properly guard against ESD damage and shocks, the wrist
strap and cord must operate effectively. If no wrist strap is available, ground
yourself by touching the metal part of the chassis.
periodically check the resistance value of the antistatic strap, which should
be between one and 10 megohms.
following helps you plan an acceptable operating environment for the chassis,
and avoid environmentally caused equipment failures.
equipment generates heat. Ambient air temperature might not be adequate to cool
equipment to acceptable operating temperatures without adequate circulation.
Ensure that the room in which you operate your system has adequate air
Ensure that the
chassis cover is secure. The chassis is designed to allow cooling air to flow
effectively within it. An open chassis allows air leaks, which may interrupt
and redirect the flow of cooling air from the internal components.
Always follow the
ESD-prevention procedures described previously to avoid damage to equipment.
Damage from static discharge can cause immediate or intermittent equipment
When installing the
chassis, consider the following:
Check the power
at the site before installing the chassis to ensure that it is “clean” (free of
spikes and noise). Install a power conditioner, if necessary, to ensure proper
voltages and power levels in the appliance input voltage.
grounding for the site to avoid damage from lightning and power surges.
The chassis does
not have a user-selectable operating range. Refer to the label on the chassis
for the correct appliance input-power requirement.
uninterruptible power source for your site, if possible.
If you are using
dual redundant (1+1) power supplies, we recommend that you use independent
electrical circuits for each power supply.
Consider the following
when planning an equipment-rack configuration:
If you are
mounting a chassis in an open rack, make sure that the rack frame does not
block the intake or exhaust ports.
Be sure enclosed
racks have adequate ventilation. Make sure that the rack is not overly
congested as each chassis generates heat. An enclosed rack should have louvered
sides and a fan to provide cooling air.
In an enclosed
rack with a ventilation fan in the top, heat generated by equipment near the
bottom of the rack can be drawn upward and into the intake ports of the
equipment above it in the rack. Ensure that you provide adequate ventilation
for equipment at the bottom of the rack.
Baffles can help
to isolate exhaust air from intake air, which also helps to draw cooling air
through the chassis. The best placement of the baffles depends on the airflow
patterns in the rack. Experiment with different arrangements to position the