Information on regenerative operation
CAUTION
Danger due to:
- Increase in the DC 24 V control voltage
- EMC influence of load circuit
Possible damage to property and malfunctions
In regenerative operation (braking operation) of the drive, energy is fed into the DC 48 V supply circuit. This energy can be used by other users connected to the same DC 48 V supply circuit. If there are no other users present, the regenerative operation energy result in an increase of the supply voltage.
This results in an increase of the supply voltage at the drive and of the 48 V current supply.
Switched-mode power supplies in supply units are equipped with output voltage monitoring. If the output voltage that is present at the power supply unit exceeds the value of the device-dependent switching threshold, this can lead to the voltage supply being switched off.
To avoid the possible regenerative voltage rise at the output of the 48 V power supply unit and the resulting switch-off, you may install an optional brake chopper with braking resistor, see chapter "Electrical installation".
Industrial switched-mode power supplies have back-feeding protection. Back-feeding protection specifies how high the voltage may be at the output during regenerative operation of the drive without the power supply being switched off or damaged. Observe the technical data of the supply unit manufacturer.
