Motor components and options
4.1 Motor components
1FW3 complete torque motors
78
Configuration Manual, 08/2020, A5E46027705B AA
PTC thermistor (option)
For special applications (e.g. when a load is applied with the motor stationary or for
extremely low speeds), additional temperature monitoring of all three motor phases using a
PTC thermistor triplet makes sense.
Ordering options: order code A11.
The thermistor connections are located on the terminal block in the power terminal box. A
cable entry of M16 x 1.5 is provided in the terminal box to connect this PTC thermistor.
Exceptions to this rule are motors with shaft heights 150 and 200 with Sensor Module
Integrated (SMI). On these motors, the thermistors are connected via the SMI.
For shaft heights 150 and 200, the thermistor connections are located on the Sensor Module
Integrated (SMI). For the other shaft heights, the thermistor connections are located on the
terminal block in the power terminal box. A cable entry of M16 x 1.5 is provided in the
terminal box to connect this PTC thermistor.
Table 4- 2
Technical data for the PTC thermistor triplet
Designation
Description
Type
PTC thermistor triplet
Thermistor resistance (20 °C)
≤
750
Ω
Resistance when hot (180 °C)
≥
1710
Ω
Response temperature
180 °C
Connection
Via external evaluation unit
Note:
PTC thermistors do not have a linear characteristic and are, therefore, not suitable to determine the
instantaneous temperature. Characteristic to DIN VDE 0660 Part 303, DIN 44081, DIN 44082.
You can find the designation of the interface for connecting the temperature sensors in
Chapter "Connecting temperature sensors (Page 308)".
4.1.2
Encoders
WARNING
Uncontrolled motor motion as a result of incorrect adjustment
The encoders are adjusted in the factory for SIEMENS drive converters. Another encoder
adjustment may be required when operating the motor with a third-party converter.
Incorrect adjustment of the encoder regarding motor EMF can lead to uncontrolled motion
which can cause injury and material damage.
•
Only replace an encoder and adjust it if you are appropriately qualified to do so.
•
When a belt-driven encoder is replaced, adjust the position of the encoder system with
respect to the motor EMF.
•
You must re-reference the system when replacing an absolute encoder.
Summary of Contents for SIMOTICS T-1FW3
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