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Overview
The ABB PM581-ETH is a high-performance CPU module from the AC500 PLC series, designed for demanding industrial automation environments. It provides exceptional control capability, robust communication flexibility, and high processing speed, enabling precise and efficient process control.
Engineered with an ARM Cortex-R8 dual-core processor, this module delivers fast response and reliable performance even in complex automation networks. Moreover, its integrated Ethernet and serial interfaces simplify system integration across various field devices and communication protocols.
Key Features and Functional Highlights
- High Processing Power: Dual-core 1.2 GHz processor ensures rapid control execution for time-critical applications.
- Integrated Communication: Includes dual Gigabit Ethernet ports supporting PROFINET, EtherCAT, and Modbus TCP.
- Versatile Connectivity: Features RS232 and RS485 serial ports for Modbus RTU/ASCII and CANopen networks.
- Flexible Expansion: Supports modules like CM579-PN-R for PROFINET redundancy and CM578-5G for 5G wireless.
- Enhanced Reliability: Operates from –40°C to +85°C, making it ideal for extreme industrial conditions.
- User-Friendly Interface: Integrated LCD display simplifies diagnostics and real-time system monitoring.
- Secure Data Handling: Includes SD card slot for firmware updates, data logging, and program storage.
Technical Specifications
Model: PM581-ETH
Series: AC500 Programmable Logic Controller
Function: Central Processing Unit (CPU)
Processor: ARM Cortex-R8, 1.2 GHz Dual-Core
User Program Memory: 256 kB
User Data Memory: 416 kB
Flash Memory: 128 MB
RAM: 64 MB (battery-backed retention)
Cycle Time: 0.01–100 ms configurable
Ethernet Ports: 2 × 10/100/1000 Mbps
Supported Protocols: PROFINET, EtherCAT, Modbus TCP, OPC UA
Serial Ports: 1 × RS232, 1 × RS485
Supported Serial Protocols: Modbus RTU/ASCII, DF1, CANopen
Expansion Options: CM579-PN-R, CM572-DPV1, CM578-5G
Supply Voltage: 24 VDC ±20% (18–30 VDC range)
Power Consumption: <35 W typical
Operating Temperature: –40°C to +85°C
Protection Class: IP20
Dimensions (W × H × D): 67.5 × 76 × 62 mm
Weight: 0.155 kg
Compliance: IEC 61000-4-4, IEC 61000-4-6
Fieldbus Interface: 1 × FBP (Fieldbus Plug)
User Interface: LCD Display and Status LEDs
Typical Applications
The ABB PM581-ETH is widely used in industrial automation systems requiring high reliability and speed. It suits process control, factory automation, power generation, and remote monitoring systems. Furthermore, its rugged design makes it ideal for extreme conditions such as offshore oil fields, mining operations, and solar power stations.
System integrators choose this CPU module for its scalable architecture, open communication, and long-term service life, ensuring smooth operation in both small and large automation networks.
Support and Reliability
ABB provides long-term support for the AC500 series, including firmware updates, technical documentation, and global service availability. In addition, its modular design allows easy maintenance and upgrades without extended downtime.
FAQ
Q1: What communication protocols does the PM581-ETH support?
It supports PROFINET, EtherCAT, Modbus TCP, OPC UA, CANopen, and Modbus RTU/ASCII.
Q2: Can I use the module in high-temperature environments?
Yes. It operates reliably from –40°C to +85°C, suitable for harsh industrial conditions.
Q3: Does it support redundant network configurations?
Yes. Using the CM579-PN-R module, it supports PROFINET S2 redundancy for high system availability.
Q4: Is the PM581-ETH compatible with older AC500 modules?
Yes. It integrates seamlessly with existing AC500 system components, protecting previous investments.
Q5: What storage options are available for program backup?
It includes an SD card slot for storing programs, firmware, and process data logs.
