Brake Unit Control Devices; Overview Of The Control Connections Of The Bcu Control Unit - ABB ACS880-604 Hardware Manual

3-phase brake units as modules
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Brake unit control devices

Each brake chopper module employs a dedicated control unit (BCU) that contains the BCON
board with basic I/Os and slots for optional modules. A fiber optic link connects the BCU to
the brake chopper module.

Overview of the control connections of the BCU control unit

The diagram shows the control connections and interfaces of the BCU control unit.
7
6
1
Analog and digital I/O extension modules and
2
fieldbus communication modules can be inserted
3
into slots 1, 2 and 3.
4
Memory unit
5
Slot 4 for RDCO-0x
6
Terminal blocks.
9
8
Operation principle and hardware description 23
4
1
2
3
5
7
Control panel.
8
Fiber optic links to power modules (inverter,
supply, brake or converter)
9
Ethernet port. Not in use.
10
Safety option interface. Only in use for the invert-
er units.
10

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