X75HD Installation and Operation Manual 51
Chapter 4: System Installation and Connections
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
After unpacking the unit and before installing into a console or rack,
allow at least 30 minutes for temperatures to equalize and to eliminate
any condensation that may have developed. X75HD frames require an
ambient temperature of between 41° to 113°F (5° to 45°C), with a
relative humidity of 10-90% (non condensing). The frame can only
maintain proper operating temperatures when the front panel is properly
installed.
Understanding Power Supply Load Limitations
Each X75HD frame has space for two power supplies; however, a
single power supply can meet the requirements of a fully-loaded frame.
An optional second power supply can be purchased to provide full
backup redundancy. See “Installing a Redundant Power Supply” on
page 52 for more information.
These ratings refer to the total module power consumption (excluding
that of the power supply) allowable within a X75HD frame. The limits
are based on the ability of the unit to dissipate heat over a temperature
range of 32
° to 122°F (0° to 45°C).
The maximum frame loading figures are described in Table 4-1 on
page 51.
Table 4-1. Ratings for Power Consumption
System Type
Maximum Dissipation
(per system type)
X75HD and X75HD-2PS 40 W
Systems with two power
supplies will draw a
negligible amount of
extra power.
X75HD-LC and X75HD-LC-2PS 34.7 W
X75HD-AV and X75HD-AV-2PS 55 W
X75HD-LCAV and
X75HD-LCAV-2PS
49.7 W
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