Technical data

10 Model 3040 40U Cabinet Site Wiring and Power
Do not place anything in front of the cabinet or behind the cabinet that would interfere
with air flow. The cabinet’s ventilation is essential to make sure that ambient air is
available to correctly cool your storage array.
Total heat dissipation is a function of the number and type of trays that are installed in
the cabinet. Use the table in Model 3040 40U Cabinet Power Requirements to
calculate the total heat dissipation for your configuration. For the total Btu/Hr for the
cabinet, add the value for each of the individual trays together.
Model 3040 40U
Cabinet Site
Wiring and
Power
The AC power distribution units in the cabinet use common industrial wiring.
 AC power source – The AC power source must provide the correct voltage,
current, and frequency that are specified on the tray and the serial number label.
 Protective ground – Site wiring must include a protective ground connection to
the AC power source.
NOTE Protective ground is also known as safety ground or chassis ground.
 Circuit overloading – Power circuits and associated circuit breakers must
provide enough power and overload protection. An external, independent AC
power source that is isolated from large switching loads is recommended to run
your storage array. The power going to the AC power distribution boxes and
other components in the cabinet should not have air-conditioning motors,
elevator motors, or factory loads on the same circuit.
 Tray power distribution – All units attached to the two individual power strip
outlets inside the cabinet must be wide-ranging between 180 VAC and 264 VAC,
50–60 Hz.
 Power interruptions – The cabinet and trays can withstand these applied voltage
interruptions:
— Input transient – 50 percent of the nominal voltage
— Duration – One-half cycle
— Maximum frequency – Once every 10 seconds
 Power failures – If a total power failure occurs, the trays in the cabinet
automatically perform a power-on recovery sequence without operator
intervention.