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•
Maintain a minimum clearance of 3 inches (7.62 cm) on the back and front of the chassis for the
cooling air inlet and exhaust ports, respectively. Avoid placing the router in an overly congested
rack or directly next to another equipment rack; otherwise, the heated exhaust air from other
equipment can enter the inlet air vents and cause an overtemperature condition inside the router.
•
Always install heavier equipment in the lower half of a rack to maintain a low center of gravity
and prevent the rack from falling over.
•
If you use telco-type racks, be sure that the rack is bolted to the floor and secured because in these
types of installations only one end of the chassis mounts to the two rack posts with the brackets.
Ensure that the weight of the chassis does not make the rack unstable.
•
Provide an adequate chassis ground (earth) connection for your router chassis.
Note
"Preparing for Installation," in the Cisco 7100 Series VPN Router Installation and Configuration
Guide for chassis grounding instructions.
Power Connection Guidelines
Follow these precautions and recommendations when planning power connections to a Cisco 7100
series router:
•
Check the power at your site before installation and periodically after installation to ensure that
you are receiving clean power. Install a power conditioner if necessary.
•
The AC power supply includes the following features:
— Autoselects either 110V or 220V operation.
— All units include a 6-foot (1.8-meter) electrical power cord. (A label near the power cord
Warning
Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S. (240 VAC, 10A international)
is used on the phase conductors (all current-carrying conductors).
•
Install proper grounding to avoid damage from lightning and power surges.
Warning
installed ground conductor. Contact the appropriate electrical inspection authority or an electrician
if you are uncertain that suitable grounding is available.
Note
approved for use with copper conductors only. The ground bond fastening hardware should be of
compatible material and preclude loosening, deterioration, and electrochemical corrosion of
hardware and joined material. Attachment of the chassis ground to a central office or other
interior ground system should be made with a 6-AWG, copper ground conductor at a minimum.
The chassis employs two threaded chassis grounding receptacles, located on the rear of the
chassis, which are intended to be bonded directly to the central offices or other interior ground
system. The chassis ground requires M3.5 screws, which are included. (For instructions on how
to properly ground the chassis, refer to Chapter 3, "Installing Cisco 7100 Series Routers" in the
Cisco 7100 Series VPN Router Installation and Configuration Guide.
We strongly recommend that you provide a chassis ground connection. Refer to Chapter 2,
indicates the correct voltage, frequency, current draw, and power dissipation for the unit.)
This product relies on the building's installation for short-circuit (overcurrent) protection.
Never defeat the ground conductor or operate the equipment in the absence of a suitably
The Cisco 7100 series router installation must comply with all applicable codes and is
Installing Field-Replaceable Units in Cisco 7100 Series VPN Routers
Power Connection Guidelines
7
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