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Themis Computer
RES-XR4-3U Installation Manual
Version 1.3
perature and alert users when chassis temperature exceeds a user-defined threshold.
1.4.2.3 System Resource Alert
Available only through SuperDoctor III in the Windows OS environment or Super-
Doctor II in Linux (an
optional
third-party product), this feature is used to notify the
user of certain system events. For example, you can also configure Supero Doctor to
provide you with warnings when the system temperature, CPU temperature, voltages
and fan speeds go beyond a pre-defined range.
1.4.3
Power Supply Monitoring
The power supplies in the Themis RES servers support a feature allowing their status
to be queried directly through software. The power supplies are connected to an I
2
C
bus used for system monitoring. This bus can be reached through the Baseboard
Management Controller (BMC), (described in subsequent paragraphs), on the moth-
erboard. Sample Linux commands to do this are included below.
1.4.3.1 I
2
C Notes
1.
Bus Address Select function:
The address is 5A.
2.
Temperature Measurement function:
The value can be obtained by reading CR14, 1LSB = 1 degree.
3.
Voltage Monitor function:
The VIN value can be obtained by reading CR10, CR11, and CR12 which rep-
r3.3V, +5V and +12V bus inputs respectively, 1LSB = 0.008V.
Example
:
(Please note that the constant values of
2
,
6
and
11
in the following examples
were derived from component values.)
If CR10= D1 then the +3.3V voltage = 0.008 * D1*
2
= 3.34V
If CR11= 68 then the +5V voltage = 0.008 * 68 *
6
= 4.99V
If CR12= 89 then the m12V voltage = 0.008 * 89 *
11
= 12.05V
Caution:
To avoid possible system overheating, please be sure to provide adequate
airflow to your system, and check for any possible blockages.
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