Dell EMC PowerEdge R240, Руководство пользователя

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Power, thermal, and acoustics
Power supply units
The power supply subsystem is formed with a AC-DC cable power supply. The power supply pr12V and +12Vaux for non-
redundant design. There are several voltage regulators in the system to supply different voltage levels needed by different logic
devices.
The Dell EMC PowerEdge R240 supports a 250W cabled AC power supply unit (PSU).
The following table shows the technical specifications of the power supply:
Table 6. Dell EMC PowerEdge R240 PSU specifications
PSU Class
Heat
dissipation
(maximum) Frequency Voltage
AC
Current
High line
100–240 V
Low line 100–
120 V
250 W AC Bronze 1039 BTU/hr
50/60 Hz
100-240 V
AC,autorangin
g 250 W N/A 4.0A-2.0 A
NOTE: This system is designed to connect to the IT power systems with a phase-to-phase voltage not exceeding 230 V
Thermal
The thermal design of the PowerEdge R240 reflects the following:
• Optimized thermal design
– The system layout is architected for an optimum thermal design i.e. system component placement and layout are designed to
provide maximum airflow coverage to critical components with minimum expense of fan power.
– Custom heat sink designs for CPU, chipset for optimum component cooling
• Comprehensive thermal design
– The power required to cool a server can contribute a significant amount to the overall system power. Thermal control is the
active management of system cooling through fan speed and system power management to make sure that the system is
reliable while minimizing system fan power consumption, airflow, and system acoustic output.
– The PowerEdge R240 thermal control system regulates the fan speed based on several different responses from critical
components’ temperature sensors as well as inventory for system configurations:
◦ Open and closed loop fan speed control. Open loop control uses system configuration information to determine fan speed
based on system inlet temperature. Closed loop control method uses component temperature feedback from various sub-
systems to dynamically determine optimum fan speeds.
◦ Increase airflow through a fan offset if required.
◦ Increase airflow through increasing minimum fan speed.
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