Motor components and options
4.1 Motor components
1FW6 Built-in torque motors
78 Configuration Manual, 07/2017, 6SN1197-0AE00-0BP9
No direct connection of the temperature monitoring circuits
Risk of electric shock when incorrectly connecting the temperature monitoring circuit
In the case of a fault, circuits Temp-S and Temp-F do not provide safe electrical separation
with respect to the power components.
• Use, for example, the TM120 or the SME12x to connect the Temp-S and Temp-F
temperature monitoring circuits. You therefore comply with the directives for safe
electrical separation according to EN 61800-5-1 (previously safe electrical separation
according to EN 50178).
Correctly connecting temperature sensors
Motor destroyed as a result of overtemperature
The motor can be destroyed as a result of overtemperature if you do not correctly connect
the temperature sensors.
• When connecting temperature sensor cables with open conductor ends, adhere to the
correct assignment of conductor colors as described in "Signal connection (Page 512)".
Technical features of temperature sensors
Technical features of PTC temperature sensors
Every PTC temperature has a "quasi-switching" characteristic. The resistance suddenly
increases in the vicinity of the response threshold (nominal response temperature Ï‘
NAT
).
PTC temperature sensors have a low thermal capacity – and have good thermal contact with
the motor winding. As a consequence, the temperature sensors and the system quickly
respond to inadmissibly high motor winding temperatures.
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