Internal devicesMTC 6 Series User’s Manual V2.00 7712.5.1. Automatic switch-off processWhen the ignition is switched on, the MTC 6 is supplied with power and begins checkingits internal temperature and automatic switch-off function.Once the ambient conditions have been verified as acceptable, the MTC 6 starts theoperating system just like normal.During the first three minutes of the start-up phase, none of the ambient conditions, suchas the internal temperature or the Ignition input status, are checked. This allows theoperating system and the operating software for the automatic switch-off module to fullyload without interruption.Following this three-minute period, the internal temperature of the unit and the status ofthe Ignition input are checked continuously.If the inner temperature of the MTC 6 reaches a critical range, the operating system isshut down normally and the computer remains switched off until the temperature is backin the permitted range.If the Ignition input is switched to earth potential or a potential-free source during normaloperation, the unit switches to shutdown delay time.In this state, the device continues to operate normally until the delay time (for example,15 minutes) has elapsed.• If the ignition is triggered again during this time, the MTC 6 resumes normaloperation.• If, however, the delay time elapses, the operating system is shut down normally bythe DLoG operating software and the unit is automatically switched off (for example,after three minutes, or after a signal from the operating software).
