Power Supply; Heat Considerations - Coastcom D/I Mux III System User Manual

Power Supply

Power supplies should be the final common equipment items to be installed. This minimizes the
occurrence of power surges, and the risk of powering up other common equipment incorrectly and
prematurely. Line cards are less sensitive to power surges, and are usually installed after the system is
powered, and the T1 is operating normally.
Tables 3-12, 3-13, and 3-14 summarize the power capabilities, and power consumption, of the D/I Mux
III for the different power supplies available. Shown in the tables are examples of the maximum number
of any particular type of line card that can be used with different power configurations. For systems with
a combination of different cards, with one type of line card approaching its power limitations, contact
Coastcom's Applications Engineering group for a power requirements evaluation.
Except where noted, the power matrix tables are for all D/I Mux III shelves in a nominal 0°- 50° C
environment. Common equipment power consumption is taken into account. (See individual line card
user manuals for specific information.)

Heat Considerations

AC and DC powered shelves should have one rack mount space clearance above and below
AC/DC powered shelves. The shelves are air cooled and if the air flow is blocked, a component
failure could occur.
Chapter 3. Installation
90