Product Technical Profile – ABB BCU‑22 (3AUA0000110431)

1) Brand and Series Overview

Brand: ABB

Series: AC500 Modular PLC Base & Expansion Rack Modules

The AC500 Series is a flexible and scalable industrial programmable logic controller (PLC) platform designed to serve diverse automation requirements in manufacturing, process industries, infrastructure, and utilities. It consists of modular CPU units, power modules, communication interfaces, I/O modules, motion control modules, and base/expansion rack units that form the physical backbone of PLC installations.

The BCU‑22 is a base and expansion rack unit tailored to support multiple AC500 PLC modules, enabling organized cabinet layout, reliable power distribution, and integrated communication across modules. This model is suitable for medium‑complexity control applications where structured expansion and system reliability are essential.

2) Product Overview

The ABB BCU‑22 (3AUA0000110431) is a PLC base rack unit designed to host and electrically interconnect AC500 modular PLC components. It provides mechanical support, 24 V DC distribution, and an integrated backplane communication bus to ensure stable power and data transfer between connected modules, including CPU, I/O, and specialty cards.

BCU‑22 supports a rack configuration that accommodates expansion throughout the lifecycle of an automation system. Its build quality and electrical design are optimized for industrial environments where long‑term reliability, ease of maintenance, and organized layout are required.

The module is configured for DIN rail mounting in control cabinets and is engineered for seamless interface with AC500 components through a standardized internal bus.

3) Technical Parameters

4) Product Description

The BCU‑22 rack unit is designed to serve as a central base platform for complex PLC installations within industrial cabinets. It provides a robust mechanical frame and an internal communication and power distribution bus that supports up to 12 modular control components.

Its integrated backplane bus eliminates excessive external wiring and reduces installation complexity while ensuring reliable signal and power distribution. The module’s DIN rail compatibility allows standardized mounting and quick integration into panel designs.

BCU‑22 is suited for applications that require multiple I/O modules, communication interfaces, motion modules, and advanced control logic components. Structurally, the unit supports secure retention of modules under industrial vibration, and its standardized layout simplifies troubleshooting and hot‑swap service.

5) Key Advantages

High Expansion Capacity
Supports up to 12 modules, offering scalability for future system upgrades.

Integrated Backplane Bus
Eliminates complex cabling and provides reliable communication between modules.

Robust Industrial Design
Mechanical stability and IP20 industrial protection make it suitable for factories and processing plants.

Organized Cabinet Layout
Structured module slots facilitate neat panel design and minimize wiring congestion.

Standardized Mounting
DIN rail mounting conforms to industrial panel standards.

High Current Capacity
Supports up to 10 A bus distribution for multiple modules.

Easy Maintenance
Modular rack architecture simplifies module replacement and fault isolation.

6) Typical Applications

• Complex manufacturing automation systems

• Large distributed I/O cabinets

• Process control panels for utilities and energy plants

• Motion control systems with multiple modules

• Building management and infrastructure automation

• Conveyor system control with distributed sensors and actuators

• Batch process control modules

• Test benches and instrumentation systems requiring modular I/O

7) Five Related Models (Same Series or Related Expansion Racks)

8) Five Popular Models (Same Brand – Industrial Portfolio)