Wiring The Terminal Strip - Siemens sinamics G120 Operating Instructions Manual

Bright and dark test
The inverter filters signal changes using bright and dark tests at its safe input using an
adjustable software filter.
4.6.8

Wiring the terminal strip

Danger to life as a result of hazardous voltages 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
Danger to life due to electric shock caused by sparkovers to the motor temperature sensor
cable
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,
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/ww/en/view/54999309)
NOTICE
Damage to the inverter when using long signal cables
Using long cables at the inverter's digital inputs and 24 V power supply can lead to
overvoltage during switching operations. Overvoltages can damage the inverter.
• If you use cables of more than 30 m at the digital inputs and 24 V power supply, connect
Converter with CU250S-2 Control Unit
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
Connecting the safety-related input (Page 502)
WARNING
with protective extra low voltage (PELV), Class 2.
WARNING
e.g. using the "External fault" function.
an overvoltage protection element between the terminal and the associated reference
potential.
We recommend using the Weidmüller overvoltage protection terminal with designation
MCZ OVP TAZ DIODE 24VDC.
Installing
4.6 Installing Control Unit
103