4.10.8 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 ashovers to the electronics of the converter can occur in motors without safe
electrical separation of the temperature sensors in accordance with IEC61800‑5‑1 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.
using the "External fault" function.
You can nd 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)
Note
Malfunction caused by incorrect switching states as the result of diagnostic ows in the
o state (logical state "0")
In contrast to mechanical switching contacts, e.g. emergency stop switches, diagnostic ows
can also ow with semiconductor switches in the o state. If interconnection with digital inputs
is faulty, the diagnostic ows can lead to incorrect switching states and thus to a malfunction of
the drive.
• Observe the conditions for digital inputs and digital outputs specied in the relevant
manufacturers documentation.
• Check the conditions of the digital inputs and digital outputs in regard to the ows in o
state. If applicable, connect the digital inputs with suitably dimensioned, external resistors
to protect against the reference potential of the digital inputs.
Installing
4.10Connecting the interfaces for the converter control
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK 105
To Next Page
Loading...
Need help?
General