Control system and interfaces 41
Control unit (BCU)
The BCU is a control unit used for controlling drives, inverters and converters via fiber
optic links. The BCU 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 SD card (data logger memory).
BCU control unit
The BCU has an integrated Ethernet port for PC tool communication and a removable
memory unit. When, for example, a converter is replaced, the parameter settings can be
retained by transferring the memory unit from the defective converter to the new one.
I/O extension and fieldbus modules
The BCU has three option slots for I/O extensions, encoders and fieldbus adapters. Two
are available for customer use, allowing the use of following fieldbus protocols: Profibus,
Modbus RTU, Modbus TCP, EtherNet/IP, Profinet, and/or analog and digital I/O extension
adapters.
The actual configuration of the I/O extensions and fieldbus adapters can be derived from
the option codes in the ordering code of the drive (for identification refer to the ACS580MV
catalog). Typical configuration includes one I/O extension adapter plus one fieldbus
module, OR, two I/O extension adapters.
1 Battery slot
2 Memory unit
3 7-segment display
4 Ethernet ports for control panel &
service PC
5 Indication LEDs
• Real time clock battery ok (BATT OK)
• Internal voltage ok (PWR OK)
• Program fault (FAULT)
• Writing to SD card (WRITE)
6 SD card slot
7 Fiber optic connections
8 3 slots for optional extension and
communication modules
9 Hardwired I/Os
10 Labels for hardwired I/Os
3
9
10
4
5
2
8
1
6
7
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