PM581-ETH: component role and practical integration notes
PM581-ETH is the specified AC500 Ethernet PLC CPU. Specify PM581-ETH by its complete designation, because visual similarity or a partial family number does not prove electrical or mechanical interchangeability.
Technical identification and selection data
| Technical item | Verified value / selection note |
|---|---|
| Complete designation | PM581-ETH |
| Product family | PM581 |
| Component role | AC500 Ethernet PLC CPU |
| Controller | ABB AC500 PM581 |
| Network | Ethernet variant |
| Supply | 24 VDC via compatible terminal base |
| Final configuration | Confirm exact nameplate, hardware revision and order options before purchase |
For PM581-ETH, the table separates confirmed family or type-code facts from items requiring the actual nameplate and installed option record. Do not assume another unit has the same interfaces.
Acceptance and service handover
For the installed PM581-ETH, Restore the approved project and verify communications, I/O mapping, program cycle and fault recovery.
Capture the observed behavior, settings, installed revision and fault status of PM581-ETH. Keep those findings with the plant asset record so a later service team can distinguish this exact code from a related option.
Where this component fits
Use PM581-ETH in the intended system context: Serve as the controller for an AC500 station where the Ethernet CPU and existing project revision match.
Document the equipment served by PM581-ETH, the normal load or signal, the site environment and the reason this component was selected. A replacement must preserve that function, not just fit the available space.
Interface and compatibility route
Before approving PM581-ETH, Check terminal base, I/O bus, Ethernet settings, program memory, firmware and application backup.
Compare the mating equipment, terminals, wiring diagram, supply, firmware or accessory choices as applicable to PM581-ETH. Resolve every mismatch before a purchase order or installation work package is released.
Same-family ordering references
The following codes share the PM581 grouping with PM581-ETH. They may differ in rating, wiring, software, safety approval or accessories and are not automatic substitutes.
No additional unassigned complete designation is listed here for PM581-ETH.
Quotation checklist
Quote PM581-ETH exactly. Include quantity, nameplate photo, installed hardware revision, drawings and the operating conditions. Ask the supplier to state in writing whether the offered item is the same full code or a separately approved alternative.
Before returning equipment to service with PM581-ETH, confirm protective devices, terminal assignment, safety functions and the accepted test record. Preserve the final code in purchasing and maintenance systems.
