Recommended Airflow
The movement of air around the router should not be more than 1 m/s from 5 inches front clearance.
Site Power Guidelines
The chassis has specific power and electrical wiring requirements. Adhering to these requirements ensures
the reliable operation of the system. Follow these precautions and recommendations when planning your site
power for the chassis:
• The redundant power option provides a second, identical power supply to ensure uninterrupted power
supply.
• Connect each power supply to a separate input power source. Otherwise, it results in a total power failure
to the system due to a fault in the external wiring or a tripped circuit breaker.
• To prevent loss of input power, ensure that the maximum load on each circuit is within the current ratings
of the wiring and the breakers.
• Check the power at your site before installation, and periodically after installation, to ensure that you are
receiving clean power. If necessary, install a power conditioner.
• Provide proper grounding to avoid personal injury and damage to the equipment due to power surges or
lightning striking power lines. The chassis ground must be attached to a central office or other interior
ground system.
This product requires short-circuit (overcurrent) protection to be provided as part of the building installation.
Install only in accordance with national and local wiring regulations. Statement 1045
Warning
This product requires external surge protection device for both AC and DC power feeds to the equipment.
For DC power feed, the surge protective device (SPD) must handle common mode and differential mode
surge as per the local standards.
Caution
The chassis installation must comply with all the applicable codes, and is approved for use with only copper
conductors. The ground bond-fastening hardware must be compatible 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 must be made with a 6-AWG gauge wire copper ground conductor.
Note
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
18
Prepare for Installation
Recommended Airflow
