Chapter 2 Installation
Installing the NSG 9000 Platform
© 2011 Harmonic Inc.
20
bNSG 9000 & NSG 9000-3G, Rev D
2.2.3
Rack Positioning and Device Mounting
2.2.3.1
Rack positioning
From front - leave clearance of at least 25”(63cm) from the front to any neighboring
cabinet/wall.
From back - leave clearance of at least 20”(51cm) from the back to any neighboring
cabinet/wall.
2.2.3.2
Device Mounting
The following table lists the guidelines and specifications for mounting the NSG 9000 devices
on a rack:
NOTE:
Do not obstruct the airflow of the platform. Severe equipment damage can result when the
device cannot properly exhaust the airflow.
2.2.4
Rack Weight
1.
Check the allowed floor load of the facility.
2.
Calculate the total weight and load according to the following parameters:
3.
Limit the number of NSG 9000 devices on a rack according to the allowed floor load.
Take into account also additional equipment to be mounted on the rack.
Parameter
Description
Occupied Space
2 rack unit
Mounting Order
Partially filled rack - load rack from the bottom to the top with the
heaviest component at the bottom of the rack.
Max Number
According to allowed floor load. See,
2.2.4 Rack Weight
on
page 20.
Spacing between units (1RU or more) is recommended for ease of
cabling. Block the spaces between units as explained in this table
in
“Open space”
.
Mounting Method
Mount each device on supporting rails provided by Harmonic in a
separate kit (P/N RM-4-30). Install the rack-mounting rails before
mounting the device on the rack.
Open space
To prevent hot air circulation:
All open spaces below and above the devices should be
closed with a blank panel.
Cabling
Route all cables at the back panel along the sides of the rack to
allow pulling out the power supply unit and QAM-RF modules.
Table 2-1: Rack Weight
Item
Value (US)
Value (metric)
Single fully loaded NSG 9000 unit
58.53 lbs
26.6 Kg
Footprint of a typical 23"x30" rack
4.8 sqr. Ft
0.446 m
2
