Wiring Terminal Strips - Siemens SINAMICS G120C Operating Instructions Manual

4.10.8

Wiring terminal strips

Electric shock due to unsuitable power supply
Death or serious injury can result when live parts are touched in the event of a fault.
• For all connections and terminals of the electronic boards, only use power supplies that
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 G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
WARNING
provide PELV (Protective Extra Low Voltage) or SELV (Safety Extra Low Voltage) output
voltages.
WARNING
using the "External fault" function.
Manual 3RS1 / 3RS2 temperature monitoring relays
4.10 Connecting the interfaces for the converter control
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Installing
105