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

Connect all of the motors to be connected in parallel to a Motor Module via a circuit breaker.
• Connect phases U, V, W of the motor in question to the corresponding terminals of the
associated circuit breaker:
U - L1
V - L2
W - L3
• Connect phases U, V, W of the Motor Module to the circuit breaker terminals:
U - T1
V - T2
W - T3
• Connect the auxiliary NO contacts of the circuit breaker in series.
• Connect the auxiliary NO contacts to an input on the CU/NCU.
• Connect the auxiliary NO contact to an external drive fault of the drive using BICO
technology. This means that when a circuit breaker trips, the complete drive is shut down
(OFF2).
• You can also evaluate the auxiliary NO contact of the circuit breaker using the PLC.
• Adjust the circuit breaker to the rated current of the motor feeder cables +10 %.
Avoiding false circuit breaker tripping
At the subsequent link you can find information in the Internet on the topic of "Influence of high-
frequency currents on thermal overload releases of circuit breakers (3RV, 3VU) and overload
relays (3RU, 3UA)" and "Additional effects that can result in nuisance tripping".
FAQ entry ID 24153083
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6.2.5

Signal connection

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.
1FW6 built-in torque motors
Operating Instructions, 09/2022, A5E52220812B AA
(http://support.automation.siemens.com/WW/llisapi.dll?
WARNING
You therefore comply with the directives for electrical separation according to
DIN EN 61800-5-1 (previously electrical separation according to DIN EN 50178).
Connection
6.2 Electrical connection
101