Function and hardware description 33
during the DC link capacitors discharge. After the DC link capacitors have discharged
completely the cabinet doors of the power compartments unlock and the SUPPLY OFF
pushbutton changes to a permanent light. The power modules can the be grounded with
the supplied grounding hook (for details see Shutting down the drive for maintenance).
Control unit
Control compartment with open swing frame
1 Control supply, mini circuit breakers
2 MCB control relays
3 Customer terminal blocks and cable
duct
4 Control unit (BCU)
5 Local control equipment (backside)
6 Fan supply, breakers
7 24 VDC power supply for control
8 -24 VDC converter for control
9 EMC cushions for cable bottom entry
10 PE busbar
11 I/O controller
12 Terminal blocks & fuses
9
10
1
3
6
5
7
8
4
11
2
12
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