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The unit is a safety–relevant piece of equipment and may only be used as specified. Other application, e.g. armature short–circuit in operation and others are not permissible. The warning information on the unit must be carefully observed! Operation with VPM is only permitted in conjunction with the SIMODRIVE 611 digital, SIMODRIVE 611 universal, converter system, shielded Motion-Connect 800 motor supply cables, and enabled permanent–magnet induction motors.
Motors with an EMF that can achieve a DC link voltage > 2 kV (EMF = 1.4 kV eff) at the highest speed are not permitted to be connected to the SIMODRIVE 611. In this case, the insulating voltage could be exceeded, resulting in personal injury due to electric shock. Voltages U 2 kV can occur at cables/conductors that are cut or damaged. In the event of an error, the terminal voltage of the permanent–magnet induction motors can assume values U 2 kV. Hazardous voltage is still present approximately 4 minutes after all voltages have been shut down (capacitor capacity of the SIMODRIVE 611 converter). In order to ensure that no hazardous voltages are present, the voltage must first be measured.
The maximum length of the power cable between the power module and Voltage Protection Module is 1.5 m. It is not permissible that this module includes any switching elements. The power cable between the Voltage Protection Module and the motor must not exceed a length of 50 m. The maximum length of the signal cable is 10 m
Signal contact X3 of the VPM is routed via a bistable relay. Very significant shocks that occur during transport and installation can cause the relay to go into the other switching state. As a consequence, it cannot be guaranteed that the system will start. To resolve the fault: 1. Connect terminal 9 and terminal 663 (pulse enable) 2. Switch–on SIMODRIVE 611D 3. Allow the spindle to rotate at an average speed for at least 2 seconds 4. Switch–off SIMODRIVE 611D; the relay is reset when the internal 24 V supply is switched off 5. Remove the jumper between terminal 9 and terminal 663
To check the function of the VPM, operate the motor at a speed for which the EMC of the motor would be approx. 650 V eff. An oscilloscope is used to measure the motor voltage. This requires that a pulse inhibit is initiated on the converter system and on the I/R unit. When the VPM is activated, the motor voltage must fall to just a few volts, if not, the VPM is defect! Note To measure the EMC: Perform the measurement with the oscilloscope. For the measurement, either potential–separate active voltage dividers for high voltages or passive probes explicitly suitable for voltages above 1.5 kV must be used. Multimeters, also not effective value multimeters, cannot be used. No standard probes may be used for the oscilloscope measurement. For measurement with passive probe, the ground clip must be set to ground, under no circumstances to the converter terminal. Then use the oscilloscope to subtract two channels, e.g. U voltage to ground and V voltage to ground, from each other and display the result on the screen.