ABB BCU-12 (3AUA0000110430) | Multi Drive Control Unit (ACS880 Multi Drive Core)
BCU-12 (order number 3AUA0000110430) is the core control unit of ABB ACS880 Multi drive system, responsible for logic control, motion control, fiber optic communication and data recording of the entire set of frequency converters. It is the standard master control for multi axis high-speed scenarios such as metallurgy, papermaking, wind power, etc.

ABB BCU-12 3AUA0000110430 control unit
1、 Basic Information
Model: BCU-12
Order number: 3AUA0000110430
Manufacturer: ABB
Type: Multi transmission Base Control Unit
Adaptation system: ACS880 multi drive (204/304 series)
Weight: Approximately 1.46 kg
Installation: 35 mm DIN rail or panel fixing
2、 Core hardware specifications
1) Processor and Storage
Core: Dual core ARM+DSP collaborative architecture (real-time control+computation)
Memory: Comes standard with 256 MB RAM
Storage: SD/SDHC card slot (up to 32 GB) for parameter backup/log storage
2) Power supply
Power supply: external 24 VDC ± 10%, typical power consumption 30 W
Redundancy: Supports dual 24 VDC inputs, automatic fault switching
3) I/O and Interface
Digital input DI: 6 channels (24 VDC, compatible with NPN/PNP)
Relay output RO: 3 channels (250 VAC/30 VDC, 2 A)
Ethernet: 1 port (10/100 Mbps, TCP/IP, used for PC tools/upper computer)
Fiber DDCS: 2-channel (XD2D), connecting various transmission modules, real-time bus, speed of 100 Mbps
Expansion slots: 3 (I/O, encoder, fieldbus adapter, such as Profinet, EtherCAT)
4) Safety and Diagnosis
Safety Function: Integrated STO (Safety Torque Off), IEC 61800-5-2）
Data recording: Built in high-speed log, storing fault/power on/operation data, supporting post analysis
Status indication: LED displays power, operation, fault, and communication status
3、 Main functions
Multi transmission centralized control: Unified management of up to 12 ACS880 transmission modules, achieving multi axis synchronization, speed/torque/position control.
High speed fiber optic communication: Connected to various modules through DDCS fiber optic, it has high real-time performance, strong anti-interference ability, and is suitable for long-distance/strong electromagnetic environments.
Parameter and data management: Supports one click backup/restore of parameters on SD card; Record operational data for easy fault tracing and maintenance.
Flexible Expansion: Three expansion slots can be used to install I/O modules, encoder interfaces, and fieldbus adapters to meet different process requirements.
Safety integration: The STO function is directly integrated without the need for additional safety relays, simplifying the design of safety circuits.
4、 Typical application scenarios
Metallurgy: Multi axis synchronous control of rolling mills, continuous casting machines, and coiling machines
Paper/Textile: High speed production line tension control, multi axis linkage
Wind power/energy: inverter main control and excitation control
Process industry: pump/compressor multi drive variable frequency control
Rail Transit: Traction Converter Multi Axis Drive Control