PLC CPU
Confirm CPU firmware, terminal base, Ethernet and serial-interface settings before replacement.
The PM571-ETH is an ABB AC500 PLC CPU with 64 kB program memory, 24 kB data memory and an RJ45 Ethernet interface. COM1 and COM2 are configurable for RS232 or RS485.
64 KB PROGRAM · 24 KB DATA · ETHERNET
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PM571-ETH is an ABB AC500 PLC CPU for compact automation applications. It provides 64 kB program memory, 24 kB data memory and an RJ45 Ethernet interface, with COM1 and COM2 available for configured serial communication.
PM571-ETH provides 64 kB program memory and 24 kB data memory, including retained-data capacity defined by ABB. Confirm the existing application size and retained-data use before migrating a project from another AC500 CPU.
No. PM571-ETH allows COM1 and COM2 to be configured for RS232 or RS485, but the physical interface does not by itself confirm an application protocol. Verify the Control Builder project, protocol configuration and connected-device requirements.
Before replacing PM571-ETH, confirm CPU firmware, terminal base, Ethernet settings, COM1 and COM2 configuration, memory requirements, wiring and the Control Builder project. A similar AC500 CPU should not be assumed to be a direct replacement.
Share the complete order number and application details for compatibility, availability and lead-time checking.
Official manufacturer-reference status for ABB PM571-ETH.
ABB official AC500 system manual covering PM571-ETH memory, Ethernet, COM1, COM2 and terminal-base requirements.
OFFICIAL DATASHEETSend the complete model, quantity, and your technical or purchasing question.
Technical statements on this page are based on the official ABB AC500 system manual.
ABB is the brand; ABB AC500 is the product family; and PM571-ETH is an AC500 PLC CPU with Ethernet and configurable COM1 and COM2 serial interfaces.
Confirm CPU firmware, terminal base, Ethernet and serial-interface settings before replacement.
The ETH version adds an RJ45 Ethernet interface; COM1 and COM2 can be configured for RS232 or RS485.
Do not treat another AC500 CPU as a direct replacement without checking memory, firmware, terminal base and project compatibility.
Moore Automation Limited supplies industrial automation spare parts to customers worldwide, with dedicated sourcing, part-number verification, pre-shipment confirmation and responsive sales support.
A clear workflow for sourcing, verification, shipment preparation, delivery and product assurance.
Include the complete part number, quantity and delivery destination.

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