Cisco Cisco Content Delivery Engine 220 インストールガイド
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Cisco Content Delivery Engine 465 Hardware Installation Guide
Chapter 2 Preparing to Install the CDE465
Safety Guidelines
Grounding the CDE— The ground connection must be made first and prior to powering the equipment.
Each power module is provided with a ground connection using the 5-mm screw. The connection is to
use a closed-loop lug and the screw is to be tightened to a torque of 6 to 8 in-lb. It is recommended that
the ground wire be number 12 to number 10 AWG, with green/yellow insulation, rated minimum 167°F
(75°C), low smoke fume (LSF) and flame retardant.
Each power module is provided with a ground connection using the 5-mm screw. The connection is to
use a closed-loop lug and the screw is to be tightened to a torque of 6 to 8 in-lb. It is recommended that
the ground wire be number 12 to number 10 AWG, with green/yellow insulation, rated minimum 167°F
(75°C), low smoke fume (LSF) and flame retardant.
A supplemental ground connection is provided on the CDE in case it is intended for installation with an
isolated DC return (DC-I) and is to be installed in a Common Bonding Network (CBN) per NEBS
GR-1089. To reliably ground the CDE to the rack when rack-mounted, connect an additional grounding
conductor to the CDE using the separate listed closed two-hole crimp lug having 5/8-inch pitch. It is
recommended that the grounding conductor wire be number 12 to number 10 AWG, with green
insulation, rated minimum 75°C (167°F), low smoke fume (LSF), and flame retardant. The ground
connections should be tightened with a torque of 6 to 8 in-lb. The metal pin of each module near the input
power connector is to be connected to a protective earthing conductor during final system assembly.
isolated DC return (DC-I) and is to be installed in a Common Bonding Network (CBN) per NEBS
GR-1089. To reliably ground the CDE to the rack when rack-mounted, connect an additional grounding
conductor to the CDE using the separate listed closed two-hole crimp lug having 5/8-inch pitch. It is
recommended that the grounding conductor wire be number 12 to number 10 AWG, with green
insulation, rated minimum 75°C (167°F), low smoke fume (LSF), and flame retardant. The ground
connections should be tightened with a torque of 6 to 8 in-lb. The metal pin of each module near the input
power connector is to be connected to a protective earthing conductor during final system assembly.
Overcurrent protection— Overcurrent protection circuit breakers must be provided as part of each host
equipment rack and must be incorporated in the field wiring between the DC source and the CDE. The
branch circuit protection should be connected to a 30 A UL listed circuit breaker (or suitably certified
for the country used), rated minimum 75 VDC, and copper wire conductors, sized for 24 A current
(12 AWG).
equipment rack and must be incorporated in the field wiring between the DC source and the CDE. The
branch circuit protection should be connected to a 30 A UL listed circuit breaker (or suitably certified
for the country used), rated minimum 75 VDC, and copper wire conductors, sized for 24 A current
(12 AWG).
Temperature and Ventilation
The ambient temperature in which the CDE465 operates must not exceed the range defined in
. Extreme fluctuations in temperature can cause a variety of problems in your CDE.
To maintain proper cooling, the equipment rack must provide sufficient airflow to the front of the CDE.
The rack selected and the ventilation provided must be suitable to the environment in which the CDE
will be used. The rack must include ventilation sufficient to exhaust the rate heat load of each CDE server
(see
The rack selected and the ventilation provided must be suitable to the environment in which the CDE
will be used. The rack must include ventilation sufficient to exhaust the rate heat load of each CDE server
(see
in