Power Supply Power Boost and Output Derating Curve
10.10.3.5
FET-OR Module Derating
The active redundancy module can be operated with the maximum current of 2 x 15 A up to an ambient temperature of 40°C
(104 °F). The device can be operated continuously with the nominal current (I
N
) with ambient temperatures up to 60°C (140 °
F). At higher temperatures (> 60°C), the output power must be decreased by 2.5% per Kelvin temperature increase. At
ambient operating temperatures above 70°C (158 °F) or in the event of a thermal overload, the unit does not switch off.
Reduce the output power enough to ensure the protection of the device.
When using the 10 A power supply unit, the derating curve is automatically maintained.
FET-OR Module Output Derating Curve
Position-dependent Derating
If the redundancy module is mounted in a position other than horizontally with input terminals facing upward, derating
applies. Refer to the derating curve to determine the maximum output power to be applied for each ambient temperature with
alternative mounting positions.
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GEH-6855_Vol_II
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
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