The ABB PM581-ETH (1SAP140100R0170) is a high-performance central processing unit designed for the AC500 PLC series. This compact module is engineered for demanding industrial automation tasks, providing reliable machine control, process data management, and flexible communication capabilities in a single, integrated package.

Features

• Integrated Ethernet interface for TCP/IP and Modbus TCP communication.
• 256 kB user program memory and 416 kB user data memory.
• Built-in LCD display with eight function keys and status LEDs for local diagnostics.
• Two configurable serial ports (RS232/RS485) and an FBP (FieldBus Plug) interface.
• Integrated SD card slot for data logging and program storage.
• Flash EPROM memory technology for high reliability in industrial environments.

Applications

• Manufacturing and production control lines.
• Packaging machinery and real-time logic control.
• Material handling systems, including conveyors and automated logistics.
• Energy, utility, and pumping station optimization.
• Infrastructure, building automation, and HVAC management.
• Marine and offshore control systems.

Technical Specifications

Installation Guidelines

• The CPU module must be installed on a standard TH35-15 DIN rail (35 x 15 mm) via the appropriate terminal base.
• Standard orientation is horizontal; vertical mounting is permissible but may require thermal derating.
• Ensure the 24 V DC power supply is correctly connected to the terminal base before operation.
• Up to 10 I/O modules can be attached directly to the right side of the CPU.
• Always power down the system before inserting or removing modules to prevent electrical damage.
• Maintain adequate clearance around the module to ensure proper ventilation and cooling.

FAQ

What is the primary function of the PM581-ETH?

The PM581-ETH serves as the central processing unit for the AC500 PLC platform, responsible for executing control logic, managing process data, and facilitating communication between field devices and supervisory systems.

Does the module support local diagnostics?

Yes, it features an integrated LCD display, eight function keys, and three LED indicators, allowing operators to monitor controller status and diagnostic messages without an engineering workstation.

What are the expansion capabilities of this CPU?

The unit supports direct connection of up to 10 I/O modules on the right side, with further scalability available through remote I/O stations.