Grass Valley XtenDD DD User Manual

Page 36

3. Installing Mainframes

3 - 4

Planning and Installation - Rev. 3 / 04.2005

3.3

INSTALLATION IN A CABINET

General rack mounting instructions

The maximum ambient temperature for this unit is 40°C.

Installing the unit in a closed or multi-unit rack assembly, together with other
units could increase the maximum ambient for this unit.

If the unit is installed in a rack, no ventilation openings should be blocked or
otherwise covered. Ensure a sufficient amount of airflow.

Mounting of the unit in the rack should be such that a hazardous condition is
not achieved due to uneven mechanical loading.

When connecting the unit to the supply circuit be sure that the supply circuit of
the rack is not overloaded. For ratings see chapter Technical Data.

The unit must be grounded to a good earth ground using a wire as specified
by the local electrical code. This wire is attached to the protective earth connec-

tor on the rear. For details refer to chapter General Grounding Requirements.

When connecting the unit in a closed or multi-unit rack assembly together with
other units be sure that the summation of the touch (leakage) currents for each

power supply circuit is not higher than 3.5 mA . In this case the rack must be

permanently connected with an earth terminal. Earth connection is essential

before connecting supply voltage! For details see chapter Technical Data.

For installation, Thomson optionally provides a 19-inch cabinet with recommended

mounting accessories. When using cabinets of other manufacturers, observe the

respective mounting instructions.

Note:

For installation into a DIN cabinet, adapter pieces of the respec-

tive cabinet manufacturer have to be mounted on both sides of

the lateral fastening flanges.

For relieving the front mounting brackets, the mainframe has also to be supported

in the rear part of the frame. The corresponding mounting parts can be obtained

as accessories from the manufacturer of the cabinet-type rack.

CAUTION

Do not use the rack ears as primary mounting means.

WARNING

With the standard modules installed, the SH-1/2/3/4-BM mainframe weights

70 kg (154 lbs). During installation and until secured in the rack, use an ap-

propriate lifting device to lift and support the mainframe. Failure to follow

this precaution can result in injury to personnel and damage to equipment.