Harmonic MediaGrid Installation And Configuration Manual page 74

Chapter 3 System Installation with the Content-
Server 3000 Series
Rack System Safety
CAUTION: The ContentStore 5840 must only be mounted into a rack using the supplied rail kit. Due to its
weight and length, the ContentStore 5840 must not be flange mounted.
CAUTION: Never move more than one ContentStore 5840 out of the rack at any one time: there is a
danger of the rack falling over.
Note the following points on rack system safety:
The ContentStore 5840 must be mounted in a rack before use.

The rack must be capable of supporting the total weight of the installed ContentStore

5840(s). A fully populated ContentStore 5840 weighs up to 1 31kg (288lb). The design should
incorporate stabilizing features suitable to prevent the rack from tipping or being pushed over
during installation or in normal use.
When loading a rack with the ContentStore 5840, fill the rack from the bottom up. When

removing ContentStores, empty from the top down.
The system must be operated with low pressure rear exhaust installation. The back pressure

created by the rack doors and obstacles is not to exceed 5 pascals (0.5mm water gauge).
The minimum open area for the rack doors is 70%.

The rack design should take into consideration the maximum operating ambient temperature

for the ContentStore 5840, which is 35°C.
The rack must have a safe electrical distribution system. It must provide over-current

protection for the ContentStore 5840 and must not be overloaded by the total number of
ContentStores installed in the rack. When addressing these concerns, consideration should
be given to the electrical power consumption rating shown on the nameplate.
The electrical distribution system must provide a reliable ground for each ContentStore 5840,

and for the rack.
Each PSU in each ContentStore 5840 has an ground leakage current of 1.6mA. The design of

the electrical distribution system must take into consideration the total ground leakage
current from all the PSUs in all the ContentStores. The rack must be labeled with the words:
"HIGH LEAKAGE CURRENT. Ground connection essential before connecting supply. "
The rack must meet the safety requirements of UL 60950-1 and IEC 60950-1.

Electrical Safety
CAUTION: It is recommended that you fit and check a suitable anti-static wrist or ankle strap and
observe all conventional ESD precautions when handling plug-in modules and components. Avoid contact
with backplane components and module connectors, etc.
The ContentStore 5840 must only be operated from a power supply input voltage range of 200
to 240 VAC, 50 to 60 Hz.
A suitable power source with electrical overload protection must be provided in order to meet the
requirements in the technical specification.
All power supply cords must have a safe electrical ground connection. Check the connection to
ground of the ContentStore 5840 before you switch on the power supply.
© 2017 Harmonic Inc. All rights reserved.
Rack Mounting the Harmonic MediaGrid 3000 Series System
74 Harmonic MediaGrid Release 4.1