Instruction Manual MC6000
4-11
4.3.5 DC Link Circuit Terminals
An external braking chopper can be connected to these terminals in order to increase braking
power especially in dynamic applications.
Following consultation with the manufacturers, LUST, you can:
1. feed in the DC link voltage or
2. connect the DC link circuits of several Servocontrollers.
All auxiliary supplies are generated from the DC link voltage.
Warning - Danger of Death!
Voltage at terminals > 500 V DC!
4.3.6 MC6000 Protection Functions
Electrical equipment is so designed that in an emergency rapid switch-off is possible to protect
human life or to prevent damage to the installation. In the case of a Servodrive there is danger
particularly from the rotating parts of the drive (both for people and also for installation
componenents). The MC6000 Servocontroller offers two possibilities for switch-off if there is
danger from the rotating drive:
1. Blocking the power stage: The power stage can be blocked directly (without software
control) via input ENPO (X5). This separates the motor from control and it then coasts on
uncontrolled or it can be braked using a mechanical brake (
see Section 4.4.4).
Warning: Cancel Start before switching on ENPO input again. Otherwise the system will
try to correct the difference between the reference value and the actual value which has
arisen in the meantime - i.e. the drive will start of its own accord.
2. Emergency Stop: This is triggered via a programmable input to which the function Emergency
Stop has been allocated. The motor will then be braked to a stop at the set maximum torque
value regeneratively and held in this position. It is also possible to use Emergency Stop via a
programmable braking ramp (
see Section 7.3.1).
These protection functions do not constitute safety arrangements in the sense of VDE0100
The usual Emergency Off arrangement in the mains supply is also possible if the Servocontroller
has to be isolated from power in an emergency. Switching off the power supply disconnects the
motor from the mains and it coasts on uncontrolled. However, it will only stop after some
considerable delay because the stored energy has to be dissipated through friction alone.
It is possible to provide the MC6000 control section with an external 24V supply so that control
functions and communication are maintained (supply at +24V and DGND terminals).
The Emergency Off safety arrangements of the Servodrive must meet the relevant
standards and regulations specific to the application (e.g. VDE0100)!