64 Parameter settings Additional notesACS880-07/17/37 drives with the option +Q978In motor overtemperature situations, the FSO module also opensthe main contractor/circuit breaker.ACS880-07/17/37 drives with the option +Q978 or +Q979The FSO module is configured so that after the safety functionactivation, the user must reset the FSO manually with theemergency stop reset button. In this case, the user must reset theFSO module with the emergency stop reset button also in motorovertemperature situations. Also the indication lamp on the resetbutton is illuminated.The compliance of the emergency stop function with the relevantstandards requires this setting. Do not change this setting.Mechanical brake controlIf you use a mechanical brake with the thermal motor protectioncircuit, pay special attention to the control of the mechanical brake.If the motor deceleration by the mechanical brake causes extraheat generation in the Ex zone, make sure that the use of thebrake does not rise the temperature excessively.In some cases you cannot use the brake for the motor decelerationwhen the motor thermal protection circuit has tripped, and themotor temperature is excessive already.For more information, see the drive firmware manual (or the FSOuser’s manual if you use the Safe brake control (SBC) function ofthe FSO module).