50 X75HD Installation and Operation Manual
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Chapter 4: System Installation and Connections
Preparing for Installation
Prior to installing your system, you need to ensure certain
environmental and electrical conditions are met, and that frame support
brackets are installed on the chassis. This section covers the following
topics:
• “Meeting Electrical Requirements” on page 50
• “Meeting Environmental Requirements” on page 50
• “Understanding Power Supply Load Limitations” on page 51
• “Installing a Redundant Power Supply” on page 52
• “Removing and Replacing Fans” on page 52
• “Upgrading to a Local Control Panel” on page 52
Meeting Electrical Requirements
The X75HD 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.
Meeting Environmental Requirements
X75HD frames are cooled by forced air drawn in from the front of the
frame and exhausted through vents at the rear. There must be free
passage for air flow at the front and back of the unit to allow for
adequate ventilation. Take care to select a dry, well-ventilated location
with a minimum of dust.
Frames are designed for mounting in a standard 19-in. (48-cm) rack
using standard front-mounting ears and rear support brackets, and
occupy a 1RU vertical space of 1.75 in. (4.4 cm). When installing a
frame in a rack, ensure that there is adequate space behind the mounting
ears and clearance for the connecting cables at the rear of the frame.
Maintain about 10 in. (25 cm) of slack in the rear connecting cables to
allow for frame access and maintenance while installed in the rack.
Caution
To ensure proper ventilation and
to prevent the frame from
overheating, keep the front
panel of a X75HD frame closed.
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