Installation guide

16-3
Cisco 10000 Series Routers Line Card Hardware Installation Guide
OL-6773-04
Chapter 16 Preparing for Installation
Safety Guidelines
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. Line cards comprise printed circuit
boards that are fixed in metal carriers. Electromagnetic interference (EMI) shielding and connectors are
integral components of the carrier. Although the metal carrier helps to protect the board from ESD, use
a preventive antistatic strap during handling.
Following are guidelines for preventing ESD damage:
• Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
• Connect the equipment end of the strap to an unfinished chassis surface.
• When installing a component, use any available ejector levers or captive installation screws to
properly seat the bus connectors in the backplane or midplane. These devices prevent accidental
removal, provide proper grounding for the system, and help to ensure that bus connectors are
properly seated.
• When removing a component, use any available ejector levers or captive installation screws to
release the bus connectors from the backplane or midplane.
• Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
• Place a removed board component-side-up on an antistatic surface or in a static shielding container.
If you plan to return the component to the factory, immediately place it in a static shielding
container.
• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
• Never attempt to remove the printed circuit board from the metal carrier.
Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be
between 1 and 10 megohms (Mohms).
Caution To avoid erroneous failure messages, remove or insert only one line card at a time. Also, after you insert
or remove a line card, allow at least 60 seconds before you insert or remove another line card so that the
system can reinitialize and note the current configuration of all interfaces.
Caution To prevent electrostatic discharge (ESD) damage, handle line cards by the faceplate or the card carrier
edges only. Avoid touching the line card printed circuit board, components, or any connector pins.
Laser/LED Safety
Any single-mode transmitters in the modules use a small laser to transmit the light signals to the network.
Keep the dust cover installed whenever a cable is not connected to it. Although multimode transceivers
typically use LEDs for transmission, it is good practice to keep open ports covered and avoid staring into
open ports or apertures. The single-mode aperture port contains a Class 1 laser warning label, as shown
in Figure 16-1.