Wiring The Terminal Strip - Siemens SINAMICS G120 Operating Instructions Manual
Low voltage converters
chassis devices with cu240b-2 and cu240e-2
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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Installing
4.5 Installing Control Unit
4.5.10
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 boards, only use power supplies that
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, e.g.
You can find additional information about the temperature monitoring relay on the Internet:
Manual 3RS1 / 3RS2 temperature monitoring relays
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.
Note
If your application requires UL certification, please note that the power supply of the digital
output must comply with specific specifications.
118
WARNING
provide PELV (Protective Extra Low Voltage) or SELV (Safety Extra Low Voltage) output
voltages.
WARNING
using the "External fault" function.
Technical data (Page 419)
(https://support.industry.siemens.com/cs/
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
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