Thermal Motor Protection - Siemens SINAMICS S120 Commissioning Manual

Commissioning
2.10 Commissioning linear motors (servo)
If the difference between the commutation angle offset of motor 1 and the other motors is
less than 10 degrees (electrical), all the motors can be connected to the drive in parallel and
commissioned as a parallel configuration of n linear motors (e.g. 2 • 1FN1xxx).
Note
Only identical linear motors (the same forces, winding types, secondary section types and air
gap) may be connected in parallel. (Order number of the primary sections to be connected in
parallel must be identical up to the winding sense and/or primary section length.)
If linear motors in an axis are connected in parallel, the position of the primary sections with
respect to one another and to the secondary sections must exhibit a specific grid, in order to
achieve a matching electrical phase position.
For more information see: /PJLM/ Configuration Manual for Linear Motors 1FN1, 1FN3
Temperature sensor and electrical wiring
The temperature sensors can be evaluated, for example, as follows:
● Temperature sensor
● Temperature switch
See also: /PJLM/ Configuration Manual for Linear Motors 1FN1, 1FN3
When connecting-up the temperature monitoring circuits, carefully observe the
specifications relating to protective separation according to DIN EN 50178.
See also: /PJLM/ Configuration Manual for Linear Motors 1FN1, 1FN3
2.10.4

Thermal motor protection

Description
Two independent monitoring circuits are available for the 1FN1, 1FN3 primary sections for
thermal motor protection.
The absolute, average winding temperature can be measured using the temperature sensor
(Temp-F) comprising a temperature sensor (KTY 84).
The overtemperature shutdown circuit (Temp-S) allows each individual motor phase winding
to be digitally monitored for an overtemperature condition.
94
– Motor 1: Evaluated via the drive
– Motor n: not connected
(short-circuited and connected to the PE)
– Motor 1 to n: Evaluation via a PLC
WARNING
Commissioning Manual, (IH1), 07/2007 Edition, 6SL3097-2AF00-0BP7
Commissioning