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32 Operation principle and hardware description
Overview of power and control connections
The diagrams show the power connections and internal control interfaces of the wind turbine
converter. See also section
unit are reserved for internal use and communication.
Master
￭
1
PSL
L1
L2
L3
6
No.
Description
1
Slots 1...3
2
RDCO (slot 4)
3
BCU-x5 control unit
4
BCU-x2 control unit
5
External control via Ethernet and selected fieldbus (optional and customer-specified). Both BCU
control units are connected to Ethernet switch.
6
Grid-side converter
7
Generator-side converter
Circuit boards (page
S500
S500
CI581-CN
AX522
XCAN
CH0 ... CH3
2
BCON
3
34). The option module slots on the control
CH0
1
PSL
4
5
CH1
CH2
CH3
2
BCON
U2
V2
W2
7
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