MOTOROLA MVME61006E-0171 Pulse input module

Several servo amplifiers coupled via the intermediate circuit circuit (DC+, DC-) The energy which is fed back into the intermediate circuit from all the motors is dealt with by all the ballast resistors which are connected. This means that the servo amplifier with the lowest ballast switch-on threshold (because of tolerances) will switch in first. If the regenerative power is lower than the ballast power of this servo drive then the intermediate circuit voltage will not rise any further and no other servo amplifiers will be switched in.

If the ballast power is insufficient 

then the servo amplifier will signal the status “Ballast power exceeded”. The intermediate circuit voltage rises further and the ballast circuit with the next higher threshold will switch in and so on. If the total regenerative power is larger than the sum of all the ballast powers, then all the servo amplifiers will signal “Ballast power exceeded”. The servo drive with the lowest overvoltage threshold (according to tolerance) will switch off with the error message “Overvoltage” and so switch off the complete system via the BTB contact.

                                                                        

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