User's Manual

Table Of Contents
Installation Guidelines
CMA-331-AEN
Page 63
4.4 Rack Installation Guidelines
These guidelines are relevant to the system components which are installed in 19-inch communication racks: RF Path
components: HEU, OIU and ICU; Ethernet components: CEU
Verify that the rack height can support all the units to be installed, where you may also want to consider future installations.
Figure 4-1 shows an example of a rack configuration for the RF path components at the headend which facilitates and
simplifies the cabling connections.
The configuration is for a single operator. If the site is serviced by more than one operator, each operator often installs their
equipment in a separate rack. Refer to section
Error! Reference source not found. for 4x4 HEU-OIU rack installation
configurations (maximum configuration including four HEU and four OIU units).
Figure 4-1. Example of Communication Rack Installation
4.4.1 Rack Safety Instructions
The following guidelines are relevant to the rack installed units. Review the following guidelines to help ensure your safety and
protect the equipment from damage during the installation.
Only trained and qualified personnel should be allowed to install or replace this equipment.
Verify that ambient temperature of the environment does not exceed 50°C (122° F)
To maintain a low center of gravity, ensure that heavier equipment is installed near the bottom of the rack and load the rack
from the bottom to the top.
Ensure that adequate airflow and ventilation within the rack and around the installed components so that the safety of the
equipment is not compromised. It is recommended to allow for at least about 2 cm of airspace between devices in the rack.
Verify that the equipment is grounded as required especially the supply connections.