ABB 1MRB150003R0002 Main Processor Module

I. Positioning and Applications

• Series Affiliation: Main Processor Module of ABB AC 500 series PLC, serving as the core control unit of the AC 500 system. It is responsible for executing user programs, processing input/output signals, and managing system communication, suitable for mid-to-high-end industrial automation control scenarios (such as manufacturing production lines, process control, power systems, etc.).
• Core Functions:

• Runs PLC programs (supporting IEC 61131-3 standard programming languages, such as LD, FBD, ST, etc.), enabling logic control, data calculation, and process management.

• Manages the system backplane bus to coordinate real-time data interaction with I/O modules and communication modules.

• Supports fault diagnosis, program debugging, and system parameter configuration to ensure the stability and reliability of control tasks.

II. Technical Parameters and Characteristics

Processor Performance

• CPU Type: 32-bit high-performance microprocessor with a main frequency ≥ 200 MHz (specific parameters subject to the model).

• Memory Configuration:

• Program memory: Typically 256 KB–1 MB (supports extended memory cards).

• Data memory: 128 KB–512 KB for storing real-time data and variables.

• Processing Speed: Basic instruction execution time ≤ 0.1 μs, suitable for high-speed logic control and complex algorithm operations.

Communication Interfaces

• Integrated Interfaces:

• 1 Ethernet interface (10/100 Mbps), supporting industrial protocols such as Modbus TCP, EtherNet/IP, and Profinet (requires software configuration).

• 1 RS-232/RS-485 serial interface, supporting communication modes such as Modbus RTU and ASCII.

• Expansion Interface: Backplane bus interface for connecting I/O modules and communication modules (such as the 500TAPxx series).

Electrical and Environmental Characteristics

• Power Supply: 24 VDC (±20%), typical power consumption ≤ 10 W.

• Isolation: Electrical isolation between power supply and signal interfaces, with strong anti-interference capability (compliant with industrial electromagnetic compatibility standards).

• Mounting Method: 35 mm DIN rail mounting, supporting vertical/horizontal installation.

• Operating Temperature: -25°C–+60°C, humidity 5%–95% (non-condensing).

III. Functional Features and Technical Highlights

System Expandability

• Supports up to 16 local I/O modules (via the backplane bus) and multiple expansion racks, meeting the I/O point requirements of complex systems (such as digital, analog, temperature modules, etc.).

• Can be externally connected to memory cards (such as SD cards) for program backup, firmware upgrades, or data recording.

Real-time Performance and Reliability

• Built-in real-time operating system (RTOS) ensures the accuracy of task scheduling, supporting interrupt handling and timing control.

• Equipped with watchdog timer, power failure detection, and error logging functions, which can trigger safe shutdown or alarms in case of faults.

Programming and Debugging

• Uses ABB Control Builder AC 500 software for programming and configuration, supporting online debugging, variable monitoring, and remote maintenance.

• Supports hot-swapping (requires system parameter configuration), allowing module replacement without power-off to reduce downtime.

IV. Interfaces and Wiring

Hardware Interface Layout

• Power Interface: 2-pin terminal block for connecting 24 VDC power supply (note the positive and negative polarities).

• Communication Interfaces:

• Ethernet interface (RJ45): Connects to industrial switches or host computers.

• Serial interface (DB9 or terminal block): Connects to serial devices such as sensors and frequency converters.

• Backplane Interface: Inserts into the AC 500 system rack to communicate with I/O modules.

Typical Wiring Examples

• Power connection: 24 VDC positive pole connected to the "+" terminal, negative pole to the "-" terminal. It is recommended to connect a 100 μF filter capacitor in parallel.

• Ethernet communication: Uses shielded twisted-pair cables to connect to the network, supporting automatic negotiation of speed and full/half-duplex modes.

V. Comparison with Similar Modules (vs. 500MBA02, 500MBA10)