Special measures to prevent cross-circuits and short-circuits
The routing of cables over longer distances, e.g. between remote control cabinets, increases
the risk of damaging cables. Damaged cables raise the risk of an undetected cross-circuit with
power-conducting cables laid in parallel. A cross-circuit can cause interruption to the transfer
of safety-related signals.
To reduce the risk of cable damage, you need to lay signal lines in steel pipes.
Special requirements placed on EMC-compliant installation
Use shielded signal cables. Connect the shield at both conductor ends.
In order to connect two or more inverter terminals, use the shortest possible jumpers directly
at the terminals themselves.
Bright and dark test
The inverter filters signal changes using bright and dark tests at the fail-safe digital input using
an adjustable software filter.
Connecting a fail-safe digital input (Page 451)
4.9.7
Wiring terminal strips
WARNING
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
provide PELV (Protective Extra Low Voltage) or SELV (Safety Extra Low Voltage) output
voltages.
WARNING
Electric shock due to unsuitable motor temperature evaluation system
Voltage flashovers to the electronics of the inverter 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 inverter, e.g.
using the "External fault" function.
You can find additional information about the temperature monitoring relay on the Internet:
Manual 3RS1 / 3RS2 temperature monitoring relays (
https://support.industry.siemens.com/cs/
)
Installing
4.9 Connecting the interfaces for the inverter control
SINAMICS G120C converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
101
Содержание SINAMICS G120C
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