ABB AC500 PM590-ETH 1SAP150000R0270 CPU Module

Technical Dossier

Product Details And Specifications

ABB AC500 Series: Comprehensive Module Range and Technical Overview

The ABB AC500 is a scalable modular PLC platform deployed across global heavy industry sectors including petrochemical refineries, nuclear power auxiliary systems, offshore oil & gas platforms, pulp and paper mills, and large-scale water treatment infrastructure. Its distributed I/O architecture and deterministic scan-cycle performance have made it a reference standard in process automation engineering since its commercial introduction. The AC500 family supports both standalone and redundant CPU configurations, with communication options spanning PROFIBUS-DP, PROFINET, EtherNet/IP, Modbus TCP, and CANopen — enabling integration into virtually any existing plant DCS or SCADA backbone. The PM590-ETH variant (order number 1SAP150000R0270) represents the mid-to-high tier of the AC500 CPU range, featuring an integrated Ethernet port for direct network connectivity without an additional communication module.

The Evolution of AC500 Architecture

The AC500 platform was introduced by ABB in the early 2000s as a successor to the CS31 and Advant Controller 31 (AC31) families. The first generation (AC500 V1.x) established the modular backplane concept using the S500 I/O system with TB511, TB521, and TB541 terminal bases. CPU modules in this era — PM554, PM564, PM572, PM581, PM582, PM590, PM591, PM592 — were differentiated by memory capacity, communication interfaces, and processing speed.

The second generation introduced the AC500-eCo line (PM554-TP, PM564-TP, PM566-TP) targeting cost-sensitive OEM applications, while the high-end AC500-S (Safety) series (PS501-S, PS502-S) added TÜV-certified SIL 2/3 safety logic execution. The AC500 V3.x firmware generation, released in the 2010s, brought 64-bit floating point support, expanded memory maps, and IEC 61131-3 structured text optimization. The PM590-ETH sits within the mature V2.x/V3.x compatible hardware generation and remains backward-compatible with S500 I/O modules deployed on earlier installations — a critical factor for brownfield plant upgrades where full system replacement is not economically viable.

AC500 Full Catalog & Functionalities (SKU List)

CPU Modules

• PM554-TP 1SAP110100R0270: Entry-level CPU, 256 KB RAM, RS-232/RS-485, no onboard Ethernet
• PM564-TP 1SAP120100R0270: Mid-range CPU, 512 KB RAM, RS-232/RS-485, compact form factor
• PM564-ETH 1SAP120200R0270: Mid-range CPU with integrated 10/100 Ethernet port
• PM566-ETH 1SAP131000R0270: Enhanced CPU, 1 MB RAM, dual Ethernet, USB programming port
• PM572-ETH 1SAP140100R0270: High-performance CPU, 2 MB RAM, Ethernet, extended I/O addressing
• PM581-ETH 1SAP141000R0270: Advanced CPU, 4 MB RAM, dual Ethernet, SD card slot
• PM582-ETH 1SAP142000R0270: Advanced CPU, 8 MB RAM, dual Ethernet, redundancy-ready
• PM590-ETH 1SAP150000R0270: High-end CPU, 16 MB RAM, dual Ethernet, full AC500 I/O range support
• PM591-ETH 1SAP151000R0270: High-end CPU with extended diagnostics and memory protection
• PM592-ETH 1SAP152000R0270: Top-tier CPU, 32 MB RAM, dual Ethernet, hot-standby redundancy support

Digital Input Modules (DI)

• DI524 1SAP240000R0001: 32-channel 24 VDC digital input, S500 I/O, standard density
• DI572 1SAP250000R0001: 16-channel 120 VAC digital input, high-voltage field wiring

Digital Output Modules (DO)

• DO524 1SAP244000R0001: 32-channel 24 VDC transistor output, 0.5 A per channel
• DO572 1SAP254000R0001: 16-channel relay output, 8 A per channel, AC/DC load

Analog Input Modules (AI)

• AI523 1SAP250100R0001: 8-channel analog input, 4–20 mA / 0–10 V, 12-bit resolution
• AI531 1SAP250200R0001: 8-channel analog input with HART protocol support, 16-bit resolution

Analog Output Modules (AO)

• AO523 1SAP250400R0001: 4-channel analog output, 4–20 mA / 0–10 V, 12-bit resolution

Communication Modules

• CM572-DP 1SAP170010R0001: PROFIBUS-DP master/slave communication module
• CM575-DN 1SAP170100R0001: DeviceNet master/slave communication module
• CM577-ETH 1SAP170900R0001: Additional EtherNet/IP and Modbus TCP communication module

Power Supply Modules

• PS501 1SAP120600R0001: 24 VDC system power supply, 3 A, for S500 I/O bus
• PS502 1SAP120700R0001: 24 VDC system power supply, 6 A, for extended I/O racks

Sourcing Hard-to-Find & Obsolete AC500 Parts

The AC500 platform spans over two decades of production, and a significant portion of installed base units — particularly first-generation PM554, PM564, and PM572 CPUs — have transitioned to limited availability or end-of-life status through ABB's standard product lifecycle management process. For plant operators running continuous processes where a control system shutdown carries six- or seven-figure downtime costs, sourcing a verified replacement module within hours rather than weeks is operationally critical.

DriveKNMS maintains a dedicated inventory buffer for AC500 modules across all CPU tiers, I/O families, and communication adapters. Our sourcing network covers manufacturer-refurbished units, tested surplus from decommissioned plant assets, and new-old-stock (NOS) from authorized distribution channels. All PM590-ETH units and equivalent CPU modules are cross-referenced against ABB's order number database (1SAP prefix) to ensure part number accuracy before shipment. For obsolete variants no longer listed in ABB's current catalog, DriveKNMS provides lifecycle extension support including multi-year supply agreements and consignment stocking arrangements for high-volume MRO customers.

Quality Control for the AC500 Range

AC500 CPU modules such as the PM590-ETH incorporate a multi-layer backplane bus interface, dual Ethernet PHY circuits, and onboard flash memory — each of which requires targeted functional verification beyond a simple power-on test. DriveKNMS applies the following test protocol to all AC500 units processed through our facility:

• Visual inspection: PCB trace integrity, capacitor condition, connector pin alignment, and conformal coating assessment
• Power-on self-test (POST): Verification of ABB firmware boot sequence and diagnostic LED status codes against factory specification
• CPU memory test: Full read/write cycle across RAM address space using ABB Automation Builder test routines
• Ethernet port validation: Link negotiation, packet throughput, and MAC address integrity check on both ETH ports
• I/O bus communication test: Functional scan cycle execution with S500 I/O modules across TB511/TB521 terminal bases
• Burn-in cycle: 48-hour continuous operation under simulated load to screen for latent component failures
• Final calibration record: All test results logged and shipped with each unit as a traceable quality document