Wire Up The Terminal Strip And Connect The Shield - Siemens SINAMICS G120 Operating Instructions Manual

Installing
4.5 Connecting the interfaces for the inverter control
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.
4.5.8

Wire up the terminal strip and connect the shield

Electric shock when connecting an 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 modules, only use power supplies with
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.
You can find additional information about the temperature monitoring relay on the Internet:
support.industry.siemens.com/cs/ww/en/view/54999309)
110
WARNING
protective extra low voltage (PELV), Class 2.
WARNING
using the "External fault" function.
Manual 3RS1 / 3RS2 temperature monitoring relays (https://
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG