7.5.2 Replacing a Control Unit with enabled safety function
DANGER
Danger from touching energized Power Module connections
After switching off the mains voltage, it will take up to 5 minutes until the capacitors in the
Power Module are sufficiently discharged for the residual voltage to be safe. Death or serious
injury can result when live parts are touched.
● Check that the Power Module connections are in a no-voltage condition after you have
removed the cables from the Power Module.
Replacing a Control Unit with data backup on a memory card
If you use a memory card with firmware, after the replacement, you obtain a precise copy
(firmware and settings) of the replaced Control Unit.
Precondition
You have a memory card with the actual settings of the Control unit to be replaced.
Procedure
To replace the Control Unit, proceed as follows:
1. Switch off the inverter power supply voltage.
2. Remove all cables from the inverter.
3. After 5 minutes, check whether the device is in a no-voltage condition.
4. Release the four Power Modules screws.
5. Remove the Power Module.
6. Withdraw the ribbon cable to the CPI module from the Control Unit.
7. Release the four screws from the Control Unit.
8. Remove the defective Control Unit.
9. Mount the new Control Unit. The new Control Unit must have the same article number and
the same or higher firmware version as the Control Unit that was replaced.
10.Insert the ribbon cable to the CPI module back into the Control Unit.
11.Mount the Power Module on the Control Unit.
12.Reconnect all of the cables to the inverter.
13.Switch on the power supply voltages again.
Corrective maintenance
7.5 Replacing components of the SINAMICS G110M inverters
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD 353
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