Product Introduction

Model Explanation

• PM581: Denotes the CPU series within AC500.

• ETH: Indicates the integrated Ethernet interface.

• R0170: Specifies the exact hardware revision.

  It belongs to the ABB AC500 PLC line and is fully compatible with the series’ terminal bases, I/O modules, and FBP communication accessories.

Technical Parameters

• Power supply: 24 V DC (20.4–28.8 V DC), power consumption approx. 8 W.

• Memory: 256 kB flash for user programs, 416 kB RAM for data, 32 kB retentive data memory.

• Processing speed: 0.07 μs/bit instruction, 0.1 μs/word instruction, 0.8 μs/floating‑point instruction.

• Temperature: Operating 0 °C to +60 °C, storage ‑40 °C to +70 °C.

• Protection class: IP20.

• Certifications: CE, cULus, RoHS.

• Dimensions: 62 × 76 × 67.5 mm; weight approx. 0.155 kg.

Interface and Communication Configuration

• Ethernet: 1 × 10/100 Mbps RJ45, supports Modbus TCP, HTTP, FTP, SNMP.

• Serial ports: 2 × configurable (COM1: RS232; COM2: RS485), supporting Modbus RTU, CS31, ASCII.

• SD card slot: For program backup/restore and firmware updates.

• Local operation: LCD with physical keys for status display, parameter setting, and fault diagnosis without a PC.

• FBP interface: Supports optional fieldbus modules (e.g., Profibus DP, CANopen) for extended connectivity.

Core Functions

• Executes complex logic, process control, and motion control tasks efficiently.

• Multi‑protocol communication enables seamless connection with HMIs, drives, instruments, and SCADA systems.

• Local LCD/keys simplify on‑site operation and maintenance.

• Supports large‑scale I/O expansion: up to 320 digital inputs, 240 digital outputs, 160 analog inputs, 160 analog outputs.

• Hot‑swap of expansion modules reduces downtime.

• SD card enables fast program backup and offline firmware upgrades.

Application Scenarios

• Factory automation: Production lines, packaging machines, machine tools, and assembly systems.

• Process industries: Water treatment, HVAC, chemical, pharmaceutical, and food & beverage.

• Infrastructure: Intelligent building control, energy management, and small‑to‑mid‑size power distribution automation.

• System upgrades: Ideal for modernizing legacy systems to support Ethernet networking and remote monitoring.

Usage and Maintenance Instructions

• Mount on a standard DIN rail (TH35‑15) and connect 24 V DC power correctly.

• Install the matching terminal base and required I/O modules; connect Ethernet and serial cables.

• Configure parameters and download programs via ABB Automation Builder before commissioning.

• Keep the environment ventilated and dry; ensure all terminals are tightened.

• Back up programs regularly using the SD card.

• Perform quarterly routine inspections and annual comprehensive tests.

• Disconnect power before disassembly or replacement to ensure safety.