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6 BCU-02/12/22 control units
Hardware description
The BCU-02, BCU-12 and BCU-22 are control units used for controlling converters via
fiber optic links. It contains integrated branching unit functionality for collecting and storing
real-time data from the converter modules to help fault tracing and analysis. The data is
stored in a secure data card.
The control unit types have a different number of fiber optic connections:
BCU type
BCU-02
BCU-12
BCU-22
You can use a BCU-22 to replace any of the control unit types.
The control unit requires an external 24 V DC power source. It has three option slots for
I/O extensions, encoders and fieldbus adapters, an integrated Ethernet port for PC tool
communication and a removable memory unit. For example, if the control unit needs to be
replaced, the parameter settings can be retained by transferring the memory unit from the
defective control unit to the new one.
The control unit has an on-board data logger that collects real-time data from the converter
power stages to help fault tracing and analysis. The data is stored onto the SDHC memory
card inserted into the SD CARD slot and can be analyzed by ABB service personnel.
The drive-to-drive link (XD2D) is a daisy-chained RS-485 transmission line that allows
basic master/follower communication with one master and multiple followers. The control
unit has also one option slot for connecting the RDCO DDCS communication option board.
For more information, see the appropriate hardware manual.
No. of fiber optic connections
2
7
12
Can be replaced with
BCU-02, BCU-12, BCU-22
BCU-12, BCU-22
BCU-22
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