70 X75HD/X75SD Installation and Operation Manual
Chapter 4: System Installation and Connections
Preparing for Installation
Prior to installing your system, ensure that certain environmental and
electrical conditions are met.
Meeting Electrical Requirements
The X75HD/X75SD power supply has a universal input of 100-240
VAC at 47 to 63 Hz (nominal). There is no voltage selector switch.
Ensure that a proper power supply source is available prior to operating
your system.
Table F-25 and Table F-26 on page 346 describe the power
consumption of individual components and system packages. These
ratings refer to the total module power consumption (excluding that of
the power supply) allowable within a X75HD/X75SD 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).
Each X75HD/X75SD 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 293 for more information.
Meeting Environmental Requirements
X75HD/X75SD units are cooled by forced air drawn in from the front
and exhausted through vents at the rear. There must be free passage for
air flow at the front and back of each unit to allow for adequate
ventilation. Take care to select a dry, well-ventilated location with a
minimum of dust.
X75HD/X75SD units are designed for mounting in a standard 19-in.
(48-cm) rack using front-mounting ears and rear support brackets,
occupying a 1RU vertical space of 1.75 in. (4.4 cm). When installing an
X75 in a rack, ensure that there is adequate space behind the mounting
ears and clearance for the rear connecting cables. Allow about 10 inches
(25 cm) of slack in the rear connecting cables for frame access and
maintenance.
Caution
To ensure proper ventilation and
to prevent overheating, keep the
front panel closed.
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