
Vector Control Chassis Type Frequency Converter Maintenance
SIEMENS AG 476 869 4070 76 J AB-74
SIMOVERT MASTERDRIVES Operating Instructions 12-9
♦
Unscrew the two screws of the electronics slide-in unit and pull it out
to its endstops.
♦
Disconnect the ground cable of the electronics slide-in unit.
♦
Remove all boards from the electronics box and place them on a
suitable surface which cannot be statically charged.
♦
Unscrew the two fixing screws of the electronics box.
♦
Push the electronics box out of its interlock and take it out towards
the front.
♦
Pull out the ABO Adaption Board.
♦
Disconnect the fiber-optic cables.
♦
Unscrew the IVI board and take it out.
♦
Install the new IVI in the reverse sequence.
12.14 Replacing the VDU and the VDU resistor
VDU: Voltage-Dividing Unit
The VDU and the VDU resistor are only found on converters with higher
supply voltages. The VDU bracket is an integral component of the
electronics slide-in unit.
♦
Detach the plug-in connections.
♦
Undo the fixing screw
♦
Take out the VDU.
♦
Install the new VDU in the reverse sequence.
♦
Unscrew the cable fasteners.
♦
Detach the plug-in connections.
♦
Take out the VDU resistor.
♦
Install the new VDU resistor in the reverse sequence.
12.15 Replacing the PSU
PSU: Power Supply Unit
♦
Withdraw connectors X18, X258 and X70.
♦
Remove the Torx screw with ground connection from the side panel.
♦
Push the PSU out of its locking pins and take it out sideways and
frontwards under the input bus.
♦
Install the new PSU in the reverse sequence.
Construction type K
VDU
VDU resistor
Construction types
E to G
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