DC power supply modules Final works 6 6.8 6.8 Final works Danger! Dangerous voltage! When the mains voltage is switched off, the DC bus is still charged for at least about 3 minutes. ƒ The state of charge is not indicated! ƒ On synchronous motors self-discharge only starts after a possible feedback operation has been completed. ƒ Discharging the DC bus in a controlled manner via the brake chopper/brake resistor requires the external 24 V supply ( digital input DI1). Possible consequences: ƒ Death or severe injuries when touching the terminals. Protective measures: ƒ Before starting work on the system check that it is deenergised.
ƒ Wait at least 3 minutes after switching off the mains voltage. ƒ Only remove deenergised devices from the installation backplanes and do not touch any terminals. How to proceed: ƒ Adjust the setting for the mains voltage/brake chopper threshold to the mains ƒ Switch on the 24 V supply ƒ Check the operating status by means of the LED display If you want to continue with the commissioning: ƒ Switch on the mains 6.8-1 EDS94SPP101 EN 3.1-04/2007