ABB PM564-RP-ETH-AC Replacement for AC500 Series

Product Overview

ABB PM564-RP-ETH-AC Replacement & Upgrade Solution for AC500 Series

The ABB PM564-RP-ETH-AC (order number 1SAP121100R0071) is a high-performance CPU module within ABB’s AC500 PLC platform, designed for demanding industrial automation environments. As legacy control systems age and original equipment manufacturers discontinue older CPU variants, facilities running earlier AC500 generations — including systems built around the PM554, PM556, PM561, or PM564 base CPUs without integrated Ethernet — face increasing pressure to modernize without triggering a full system overhaul. The PM564-RP-ETH-AC addresses this challenge directly: it delivers a smooth, cost-effective migration path that preserves existing rack infrastructure, I/O wiring, and application logic while introducing native Ethernet connectivity and expanded processing capacity.

For plants currently operating on legacy ABB Advant, MOD 300, or early AC500 architectures, the PM564-RP-ETH-AC represents a targeted upgrade rather than a wholesale replacement. Engineers can retain the existing TB521 or TB541 terminal base units, continue using installed SM500 series I/O modules — including digital input/output modules such as the DC532 and DC522, as well as analog modules like the AX521 and AX522 — and maintain existing field wiring without re-termination. This dramatically reduces both engineering hours and the risk of wiring errors during commissioning.

Communication compatibility is a critical factor in any migration project. The PM564-RP-ETH-AC supports PROFIBUS DP (via the CM572-DP communication module), MODBUS TCP/IP natively over its onboard Ethernet port, and CANopen through the CM574-CN module. Facilities that previously relied on serial MODBUS RTU links can transition to MODBUS TCP/IP without rewriting the core application program — only the communication configuration parameters require updating in Automation Builder. For sites integrating with SCADA systems or historian platforms via OPC DA or OPC UA, the onboard Ethernet port enables direct connectivity without an intermediate gateway device.

Physical installation is equally straightforward. The PM564-RP-ETH-AC mounts directly onto the standard AC500 rack (TB526 or TB541 backplane) using the same mechanical footprint as predecessor CPU modules. Control cabinet space requirements remain unchanged, and the 24 VDC power supply input is compatible with existing PS501 or PS560 power supply modules already installed in the cabinet. No additional DIN rail space or panel cutouts are required, making this an ideal drop-in upgrade for retrofit projects where cabinet real estate is constrained.

From a programming perspective, existing Automation Builder projects developed for earlier PM5xx CPUs can be migrated with minimal rework. The IEC 61131-3 compliant programming environment supports all five standard languages — Ladder Diagram, Function Block Diagram, Structured Text, Instruction List, and Sequential Function Chart — ensuring that control logic developed over years of operation is fully reusable. Variable tables, function blocks, and library references transfer cleanly, and the expanded 512 KB user program memory of the PM564-RP-ETH-AC accommodates growing application complexity without requiring program restructuring.

For facilities managing spare parts inventory, the PM564-RP-ETH-AC is a strategically sound stocking choice. It replaces a broad range of discontinued or end-of-life AC500 CPU variants, consolidating your critical spare inventory around a single, actively supported module. Each unit supplied by TOPNLMS undergoes pre-shipment functional verification, is shipped in original or equivalent protective packaging, and is covered by a 12-month replacement warranty. Units are held in bonded warehouse stock in Xiamen and can be dispatched within 1–3 business days via DHL Express, FedEx International Priority, or sea freight for bulk orders.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful AC500 migration rarely involves the CPU module alone. In practice, upgrading to the PM564-RP-ETH-AC is most effective when coordinated with a review of adjacent system components. If your existing installation uses the CM579-ETH communication module as an Ethernet add-on for an older CPU, that module becomes redundant once the PM564-RP-ETH-AC is installed — freeing up a communication slot for other expansion needs, such as adding a CM572-DP for PROFIBUS DP connectivity to field devices or a CM574-CN for CANopen network integration.

On the I/O side, facilities often take the opportunity during a CPU upgrade to audit and refresh aging SM500 series modules. Digital I/O modules such as the DC532 (32-channel digital input) and DC522 (32-channel digital output) are frequently replaced in parallel with the CPU to eliminate latent failure risks and ensure the entire control node is operating on verified hardware. Similarly, analog I/O modules including the AX521 (4-channel analog input) and AX522 (4-channel analog output) may be refreshed to take advantage of improved signal accuracy and diagnostics available in current production variants.

For sites where the HMI layer also requires modernization, the CP635 or CP651 operator panels integrate natively with the AC500 platform via Ethernet, enabling a unified upgrade of both the control and visualization layers in a single project phase. Power supply integrity is equally important: the PS560 power supply module, rated for 24 VDC input and 10 A output, is the recommended companion for PM564-RP-ETH-AC installations in larger rack configurations. Finally, for programming and firmware update tasks during commissioning, the TK501 USB programming cable provides reliable connectivity between the engineering workstation and the CPU’s programming port, ensuring uninterrupted access throughout the retrofit process.

Retrofit Guidance FAQ

Q: Can I replace my existing PM554 or PM556 CPU with the PM564-RP-ETH-AC without changing the terminal base?
A: Yes. The PM564-RP-ETH-AC is mechanically and electrically compatible with the TB521 and TB541 terminal bases used by earlier AC500 CPU modules. No terminal base replacement is required.

Q: Will my existing Automation Builder project run on the PM564-RP-ETH-AC without modification?
A: In most cases, yes. Projects developed for PM554, PM556, or PM561 CPUs can be migrated to the PM564-RP-ETH-AC with minimal changes — primarily updating the target CPU type in the project settings and reviewing communication configuration parameters if switching from serial MODBUS RTU to MODBUS TCP/IP.

Q: Does the integrated Ethernet port support OPC UA for SCADA integration?
A: The PM564-RP-ETH-AC supports MODBUS TCP/IP natively. OPC UA server functionality is available through ABB’s AC500 software stack when configured appropriately in Automation Builder. Consult the AC500 system manual for OPC UA configuration details.

Q: How much physical space does the PM564-RP-ETH-AC require in the control cabinet?
A: The module occupies a single CPU slot on the AC500 rack (TB526 or TB541 backplane) — identical to the predecessor CPU modules it replaces. No additional DIN rail space or cabinet modifications are required.

Q: What is the recommended procedure for replacing the CPU in a live production environment?
A: Best practice is to back up the existing application program and data using Automation Builder before powering down the rack. After installing the PM564-RP-ETH-AC, restore the program, update the CPU target configuration, and perform a cold-start commissioning check. TOPNLMS recommends scheduling the swap during a planned maintenance window to minimize production impact.

Q: Is the PM564-RP-ETH-AC compatible with PROFIBUS DP field devices?
A: Yes, via the CM572-DP communication module installed in a communication slot on the same rack. The PM564-RP-ETH-AC acts as the PROFIBUS DP master, and existing PROFIBUS DP slave configurations can be imported from the legacy project.

Warranty Assurance

Every ABB PM564-RP-ETH-AC (1SAP121100R0071) supplied by TOPNLMS is backed by a 12-month replacement warranty from the date of shipment. Prior to dispatch, each unit undergoes a documented pre-shipment inspection covering visual integrity, connector condition, firmware version verification, and basic power-on functional testing. Units that do not meet our quality standards are quarantined and not shipped.

In the event of a confirmed defect within the warranty period, TOPNLMS will arrange a replacement unit at no additional cost. Our after-sales response target is 24 hours for initial fault assessment and 3–5 business days for replacement dispatch, subject to stock availability. For critical production environments, we recommend customers maintain a local hot-spare unit — we can supply additional units at preferential pricing for customers purchasing two or more modules.

All units are shipped from our bonded warehouse in Xiamen, China, with full export documentation including commercial invoice, packing list, and certificate of origin. Preferred carriers include DHL Express and FedEx International Priority for time-sensitive orders. Sea freight consolidation is available for bulk procurement. Import duties and customs clearance are the responsibility of the buyer unless otherwise agreed in writing.

For procurement inquiries, technical pre-sales support, or warranty claims, contact our industrial automation team directly.