Siemens SIMOTICS T-1FW68, Configuration Manual

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Motor components and options
4.1 Motor components
1FW68 radial segment motors
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Configuration Manual, 08/2021, A5E51132930B AA
Note
Shutdown time
If Temp-S responds, and its response threshold is not undershot again in the meantime,
then the drive system must shut down (de-energize) the motor within 5 seconds. This
prevents the motor windings from becoming inadmissibly hot.
NOTICE
Motor destroyed as a result of overtemperature
The motor can be destroyed if the motor winding overheats.
• Connect Temp-S.
• Evaluate Temp-S.
• Ensure that the shutdown time is not exceeded.
Note
No temperature monitoring with Temp-S
As a result of their non-linear characteristic, PTC temperature sensors are not suitable
for determining the instantaneous temperature.
Temp-F
The Temp-F temperature monitoring circuit comprises an individual temperature sensor.
Contrary to Temp-S, this temperature sensor only monitors one phase winding. As a
consequence, Temp-F is only used for monitoring the temperature and diagnosing the
motor winding temperature.
NOTICE
Motor destroyed as a result of overtemperature
If you use Temp-F for thermal motor protection, then the motor is not adequately
protected against destruction as a result of overtemperature.
• Evaluate the Temp-S temperature monitoring circuit to implement thermal motor
protection.