Signal Connection - Siemens Simotics T-1FW6 Operating Instructions Manual

Avoiding false circuit breaker tripping
At the following link you can find information in the Internet on the topic of "Influence of high-
frequency currents on thermal overload trips of circuit breakers (3RV, 3VU) and overload
relays (3RU, 3UA)" and "Additional effects that can result in false trips".
FAQ entry ID: 24153083
http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&objid=24153083&no
deid0=20358027&caller=view&lang=de&extranet=standard&viewreg=WW&u=NDAwMDAxN
wAA&siteID=cseus
5.2.5

Signal connection

Risk of electric shock if the temperature monitoring circuit is incorrectly connected
In the case of a fault, Temp-S and Temp-F circuits do not provide electrical separation with
respect to power circuits.
•
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.
•
1FW6 external rotor built-in torque motors
Operating Instructions, 12/2020, A5E49196960B AB
WARNING
To connect Temp-S and Temp-F temperature monitoring circuits, use a TM120 or a
SME12x, for example. You therefore comply with the directives for electrical separation
according to EN 61800-5-1 (previously electrical separation according to EN 50178).
When connecting temperature sensor cables with open conductor ends, pay attention to
the correct assignment of conductor colors.
Connection
5.2 Electrical connection
77