Safe operating temperatures of LE910

7 thoughts on “Safe operating temperatures of LE910

  1. Hi,

    Can you please let me know the ‘safe’ operating temperatures of the LE910 modue – or more specifically, what is too hot?

    Regards,

    Mark

    1. Are you looking after anything else than what says the Product Description, -40 to 85 deg. Celsius, environmental requirements?

      1. Are you looking after anything else than what says the Product Description, -40 to 85 deg. Celsius, environmental requirements?

        Thanks Cosmin

        For the upper range (80-85) is this figure safe for extended operation or just transient?

        Context – in our application we’re seeing 80-86 during stability testing, haven’t seen how high it will go as we stop the test @ 86

        Regards,

        Mark

        1. Since the customer is reaching a temperature higher than 85 decrease, suggest to use the commands AT#TEMPMON, AT#TEMPCFG and AT#GPIO in order to activate thermal mitigation according to thermal configuration file.

          1. Since the customer is reaching a temperature higher than 85 decrease, suggest to use the commands AT#TEMPMON, AT#TEMPCFG and AT#GPIO in order to activate thermal mitigation according to thermal configuration file.

            Thanks for the update.

            It’s a little cryptic – is there some best-practice guide?

            Perhaps this is a different topic but I’m not sure I understand how TEMPCFG helps. For example, if the device overheats during normal operation and thermal management plan simply cuts off functionality (which makes the device useless anyway) then it’s not really helping solve the problem.

            Then it would seem that the only solution is a physical one to remove the heat or replace the unit with one that runs cooler?

            Regards,

            Mark

          2. Hello,

             

            Please refer to the AT guide rev.4 pages 285-287 for explanation how top use the TEMPCFG command.

            Cutting off communication is only one option to cool the module, you can use option 2 and 2 first.

             

            Mitigation action options:

            0 – No mitigation action is required.

            1 – Mitigation action – data throttling (reducing uplink baud rate).

            2 – Mitigation action – TX backoff (reducing MTPL – Max Tx Power Limit).

            3 – Emergency Calls Only.

            4 – RF OFF. RX and TX circuits automatically disabled (using +CFUN=4).

            5- Automatic shutdown. Module is powered off.

            User is prohibited from setting ‘action info’ equal to ‘5’in ‘operate normal zone’. This comes in order to 

            prevent, setting ‘Automatic shutdown’ by a mistake to the normal operating temperature range. 

            A “+CME ERROR: operation not supported” error will be received as a response.

          3. Thank you very much for the explanation – we’ll try that!

            Does it also mean that with a more sensitive antenna, the TX power and so heat generation will be lower?

            Couple of other thoughts on similar lines:

             > If we’re not using the voice functionality, is there something we can disable here?

             > If we turn off the GPS will that save some processing cycles + heat?

             > Does the data driver affect the processing overhead so heat generated/byte (e.g. is QMI more computationally efficient than ppp AT commands)?

            Thanks,

            Mark