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4.2.10
Wiring the terminal strips
Electric shock due to unsuitable motor temperature evaluation system
Voltage flashovers to the electronics of the converter can occur in motors without safe
electrical separation of the temperature sensors in accordance with IEC 61800‑5‑1 when the
motor develops a fault.
● Install a temperature monitoring relay 3RS1... or 3RS2...
● Evaluate the temperature monitoring relay output using a digital input of the converter, e.g.
You can find additional information about the temperature monitoring relay on the Internet:
support.industry.siemens.com/cs/ww/en/view/54999309)
Note
Malfunction caused by incorrect switching states as the result of diagnostic flows in the off state
(logical state "0")
In contrast to mechanical switching contacts, e.g. emergency stop switches, diagnostic flows
can also flow with semiconductor switches in the off state. If interconnection with digital inputs
is faulty, the diagnostic flows can lead to incorrect switching states and thus to a malfunction of
the drive.
● Observe the conditions for digital inputs and digital outputs specified in the relevant
manufacturers documentation.
● Check the conditions of the digital inputs and digital outputs in regard to the flows in off state.
If applicable, connect the digital inputs with suitably dimensioned, external resistors to
protect against the reference potential of the digital inputs.
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
S7-1500 (https://support.industry.siemens.com/cs/ww/en/view/86140384)
ET 200SP (https://support.industry.siemens.com/cs/ww/en/view/84133942)
ET 200pro (https://support.industry.siemens.com/cs/ww/en/view/22098524)
ET 200S (https://support.industry.siemens.com/cs/ww/en/view/12490437)
S7-300 (https://support.industry.siemens.com/cs/ww/en/view/19026151)
WARNING
using the "External fault" function.
Manual 3RS1 / 3RS2 temperature monitoring relays
4.2 Control interfaces
(https://
Wiring
139
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