Dell S4820T, Руководство по установке

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NOTE: The rack installation ears are not a suitable grounding point.
CAUTION: Grounding conductors must be made of copper. Do not use aluminum conductors.
NOTE: Coat the one-hole lug with an anti-oxidant compound prior to crimping. Bring any un-
plated mating surfaces to a shiny finish, and coat with an anti-oxidant prior to mating. Plated mating
surfaces must be clean and free from contamination.
To connect the ground cable to the S4820T system, follow these steps:
1. Cut the ground cable to the desired length. The cable length must facilitate the proper operation of
fault interrupt circuits. Dell Networking recommends using the shortest cable route allowable.
2. Attach the one-hole lug to the chassis using the supplied M4x0.7 screw with the captive internal
tooth lock washer. Torque the screw to 20 in-lbs.
3. Attach the other end of the ground cable to a suitable ground point. The rack installation ears are not
a suitable grounding point.
Installing the SFP+ and QSFP+ Optics
The S4820T has four quad small form-factor pluggable plus (QSFP+) optical ports.
For a list of supported optics, refer to the S4820T data sheet at http://dell.com or contact your Dell
Networking representative.
CAUTION: ESD damage can occur if the components are mishandled. Always wear an ESD-
preventive wrist or heel ground strap when handling the S4820T and its components.
WARNING: When working with optical fibres, follow all the warning labels and always wear eye
protection. Never look directly into the end of a terminated or unterminated fibre or connector
as it may cause eye damage.
1. Position the optic so it is in the correct position. The optic has a key that prevents it from being
inserted incorrectly.
2. Insert the optic into the port until it gently snaps into place.
NOTE: Both rows of QSFP+ ports require that you install the 40GbE optics with the tabs facing
up.
NOTE: When you cable the ports, be sure not to interfere with the airflow from the small vent
holes above and below the ports.
Remove an optic by pushing the tab on the optic and sliding the optic from the port.
NOTE: When removing optics with direct attach cables (DACs) from the port, pull the release tab
firmly and steadily. Before pulling the release tab, you may need to gently push the optic into the
port to ensure it is seated properly. Do not jerk or tug repeatedly on the tab.
Removing QSFP+ Optics
CAUTION: Prior to pulling the release tab, you may need to gently push the optic into the port to
ensure it is seated properly. Do not jerk or tug repeatedly on the tab.
• Remove an optic by pushing the tab on the optic and sliding the optic from the port.
• When removing optics with DACs from the port, pull the release tab firmly and steadily.
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Install the Hardware