Additional system components
7.6 Terminal Module TM150
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
261
Note
Incorrect temperature measured values as a result of cables with an excessively high
resistance
An excessively long cable length or an excessively small cable cross
-section can falsify the
temperature measurement (for a PT100, 10
Ω cable resistance can falsify the measurement
result by 10%). As a consequence, excessively high measured values are outp
ut, which
could lead to the motor being unnecessarily tripped prematurely.
Use only cable lengths ≤ 300 m.
For cable lengths >100 m, use cables with a cross-section of ≥1 mm
2
.
Figure 7-31 Connecting a PT100/PT1000 with 2x2, 3 and 4-wires to the temperature sensor inputs
X53x of Terminal Module TM150
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