PXIe-4154 Thermal Protections and Precautions

The PXIe-4154 is protected against excessive temperatures and will shut down in the presence of excessive heat. In the event of an overtemperature condition, NI-DCPower reports an error and disables the output of the device. The output relays also disconnect the channel circuitry from the output connector pins to disconnect the PXIe-4154 from any external circuitry. Once the PXIe-4154 is disabled, the error condition must be cleared by resetting the channel or instrument in order to resume normal operation.

If the PXIe-4154 is sourcing or sinking within the rated specifications, the thermal protection should not engage over the rated operating temperature range.

Thermal protection may also become engaged if the output becomes unstable because of inductive loads in the highest current range. If you are operating the PXIe-4154 within the rated specifications and the thermal protection is engaging, consider whether instability may be a factor in overtemperature operation of your instrument.