Technical Features Of Temperature Sensors - Siemens SIMOTICS T-1FW6 Configuration Manual

Motor components and options
5.1 Motor components
1FW6xxx-xxxxx-xxx1: with KTY 84
1FW6xxx-xxxxx-xxx2: with KTY 84
1FW6xxx-xxxxx-xxx3: with Pt1000
No direct connection of the temperature monitoring circuits
Risk of electric shock if the temperature monitoring circuits are incorrectly connected
In the case of a fault, circuits Temp‑S and Temp‑F do not provide safe electrical separation with
respect to the power circuits.
• Use the TM120 or SME12x to connect temperature monitoring circuits Temp‑S and Temp‑F.
Correctly connecting temperature sensors
NOTICE
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
5.1.2.2

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 ϑ
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.
80
WARNING
You therefore comply with the directives for safe electrical separation according to DIN EN
61800‑5‑1 (previously safe electrical separation according to DIN EN 50178).
correct assignment of conductor colors as described in "Signal connection (Page 466)".
NAT
1FW6 Built-in torque motors
Configuration Manual, 09/2022, A5E52220645B AA
).