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installed on the supply module cubicle door, and wired to DI2. When the digital input
DI2 is on, it is also possible to control the Run enable signal from a control panel,
through fieldbus interface, or from the inverter unit.
For other control signals, see the firmware manual and the default I/O connection
diagram.
Auxiliary voltage switch
￭
You can equip the unit with an auxiliary voltage switch [Q20, Q22]. Using the switch,
you can disconnect the auxiliary circuit from the power line.
We recommend to equip the auxiliary voltage supply with disconnecting device(s), to
be able to disconnect also auxiliary voltages from the supply module cubicles for
maintenance work.
Operating switch
￭
You can equip the cabinet with an operating switch [S21].
By default, the operating switch controls the unit as follows:
•
The ENABLE/RUN position: If the supply unit has an internal or external charging
circuit, the control program charges first the DC link. Then the main contactor
closes and the supply module starts to rectify. If the supply unit has no charging
circuit, the switch closes the main contactor.
•
The OFF position: The control program opens the main contactor [Q2] and the
module stops rectifying.
The control unit
￭
The diode supply unit is controlled by a ZCU control unit.
Control panel [A59]
￭
With the control panel, the user can:
•
start and stop the unit
•
view and reset the fault and warning messages, and view the fault history
•
view actual signals
•
change parameter settings
•
change between local (control panel) and remote (external device) control.
To be able to start and stop the unit by the control panel, the Run enable signal and
Start enable signal must be on (1) on the supply control unit. Normally, this is the case
when the operating switch [S21] on the cabinet door is in ENABLE/RUN (1) position.
The control mode selection on the control panel must also be Local. The Loc/Rem key
of the panel selects between the local and remote control modes.
PC connection
￭
There is a USB connector on the front of the control panel that can be used to connect
a PC to the drive. When a PC is connected to the control panel, the control panel keypad
is disabled.
Operation principle and hardware description 27
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