Cautions
Use these general cautions in any product HW installation guide if applicable. No
references to product names are used.
- A caution calls your attention to a possible hazard that can damage equipment.
Chengwee: Please review all Cautions
- “Vorsicht” weist auf die Gefahr einer möglichen Beschädigung des Gerätes hin.
- Une mise en garde attire votre attention sur un risque possible d'endommagement de l'équipement.
- Un mensaje de precaución le advierte sobre un posible peligro que pueda dañar el equipo.
General Cautions
Caution: Make sure the airflow around the front, sides, and back of the device is not restricted.
Caution: Risk of explosion if battery
is replaced by an incorrect type. Dispose of used batteries according to the
manufacturer’s instructions.
Caution: To prevent damage to the chassis and components, never attempt to lift the chassis
using the fan or power supply handles or port cover tabs. These handles were not designed
to support the weight of the chassis.
Caution: Do not install the device in
an environment where the operating ambient temperature might exceed 45°C (113°F).
Caution: Ensure that the airflow direction of the power supply unit matches that of the installed
fan tray. The power supplies and fan trays are clearly labeled with either a green
arrow with an "E", or an orange arrow with an "I."
Caution: If you observe that the switch has powered down approximately two minutes after a
power supply replacement, it is likely because the new power supply has a mismatched
airflow. Check your console for error messages.
Caution: This document describes how to change field-replaceable units (FRUs) for units with
either a port-side air exhaust or a port-side air intake. You must replace a failed
FRU with a FRU of the same type. This applies to both power supplies and fan assemblies.
A new FRU must have the same part number (P/N) as the FRU being replaced. The manufacturing
P/N is located on the top of the FRU. The P/N ends in either -F (front-to-rear airflow)
or -R (rear-to-front airflow). You must use a replacement FRU that has the same airflow
designator with the part number.
Caution: Disassembling any part of the power supply and fan assembly voids the warranty and
regulatory certifications. There are no user-serviceable parts inside the power supply
and fan assembly.
Caution: Never leave tools inside the chassis.
Caution: If you do not install a module or a
power supply in a slot, you must keep the slot filler panel in place. If you run
the
chassis with an uncovered slot, the system will overheat.
Caution: Changes or modifications made to this device that are not expressly approved by the
party responsible for compliance could void the user's authority to operate the equipment.
Caution: Because the cooling system
relies on pressurized air, do not leave any of the power supply and fan assembly
slots empty longer than two minutes while the switch is operating. If a power
supply
or fan assembly fails, leave it in the switch until it can be replaced.
Caution: Use the screws specified in the procedure. Using longer screws can damage the device.
Caution: Be sure not to exceed the
minimum recommended bend radius for the cables: 2 inches for MRJ-21 cables, and
1.5
inches for Category 5 (RJ-45) and fiber-optic cables.
Caution: To protect the serial port from damage, keep the cover on the port when not in use.
Caution: The 1-GbE Management Port is
suitable for connection to intrabuilding or unexposed wiring or cabling only.
The
1-GbE Management Port MUST NOT be metallically connected to interfaces that connect
to the OSP or its wiring. These interfaces are designed for use as intra-building
interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE, Issue 6)
and
require isolation from the exposed OSP cabling. The addition of Primary Protectors
is not sufficient protection in order to connect these interfaces metallically
to
OSP wiring.
Electrical Cautions
Caution: Before plugging a cable into any port, be sure to discharge any static charge stored
on the cable by touching the electrical contacts to a ground surface.
Caution: To avoid high voltage shock, do not open the device while the power is on.
Caution: Static electricity can damage the chassis and other electronic devices. To avoid damage,
keep static-sensitive devices in their static-protective packages until you are ready
to install them.
Caution: All devices with DC power supplies are intended for installation in restricted access
areas only. A restricted access area is a location where access can be gained only
by trained service personnel through the use of a special tool, lock and key, or other
means of security, and is controlled by the authority responsible for the location.
Caution: All devices with AC power sources are intended for installation in restricted access
areas only. A restricted access area is a location where access can be gained only
by trained service personnel through the use of a special tool, lock and key, or other
means of security.
Caution: Use a separate branch circuit for each power cord, which provides redundancy in case
one of the circuits fails.
Caution: Ensure that the device does not overload the power circuits, wiring, and over-current
protection. To determine the possibility of overloading the supply circuits, add the
ampere (amp) ratings of all devices installed on the same circuit as the device. Compare
this total with the rating limit for the circuit. The maximum ampere ratings are usually
printed on the devices near the input power connectors.
Caution: Remove the power cord from a power supply before you install it in or remove it from
the device. Otherwise, the power supply or the device could be damaged as a result.
(The device can be running while a power supply is being installed or removed, but
the power supply itself should not be connected to a power source.)
Caution: For the DC input circuit to the system, make sure there is a 10 Amp circuit breaker,
maximum 60 VDC, double pole, on the input terminal block to the power supply. The
input wiring for connection to the product should be copper wire, 18 AWG, marked VW-1,
and rated minimum 90°C.