Installation • General instructions for performing temperature testing
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Power Panel 500 user's manual V1.40
2.3 Evaluating temperatures in operating systems other than Windows
For applications that don't use Windows, temperatures can be evaluated with the help of the B&R implementation
guide. In addition to the implementation guide, there are also programs available in MS-DOS.
The implementation guide only describes device-specific functions and not the main functions of the example
programs.
If code from the example programs is used, it is important to observe the notes in the implementation guide re-
garding TODO statements, I/O access functions, etc.
Information:
Example programs and implementation guides for all B&R Industrial PCs and Power Panels are avail-
able at no cost from the B&R website (
2.4 Evaluating the measurement results
The maximum temperature value recorded by each sensor must not exceed the temperature limits specified in
the user's manuals.
If the temperature tests cannot be performed in a climate-controlled chamber, they can still be performed in an
office environment. In this case, however, it is necessary to measure the ambient temperature. Experience at B&R
has shown that values measured on passive systems (systems without a fan kit) can be projected linearly based
on the ambient temperature. In order to be able to project the temperature values for systems with a fan kit, the
fans must be running. It is also important to take values such as speed into consideration.
If the temperature tests are performed in a climate-controlled chamber with fans, the fans will cool the devices and
skew the results. Measurement results for passive devices would therefore be unusable in this case. In order to
obtain accurate results in climate-controlled chambers with fans, the fans must be turned off and the device must
be allowed to run for a sufficient amount of time (several hours) before beginning the test.
Example using a 2-slot APC810
The following example is only valid if the instructions for installation and mounting orientation provided in the user's
manual are observed.
Temperature sensor
Measured temperature
Projected temperature
Ambient temperature
20°C
35°C
45°C
CPU
48°C
63°C
73°C
CPU board
51°C
66°C
76°C
Board I/O
51°C
66°C
76°C
Board ETH2
52°C
67°C
77°C
Board power supply
51°C
66°C
76°C
ETH2
65°C
80°C
90°C
Power supply
51°C
66°C
76°C
Table 98: Evaluation example using a 2-slot APC810
