ABB 1SAP140100R0160 - PM581-ARCNET CPU (AC500)

The ABB 1SAP140100R0160 is the order code for the PM581-ARCNET CPU of the AC500 PLC family, described by distributors as a programmable logic controller with 256kB of program memory, 24 VDC supply, ARCNET interface, two RS232/RS485 serial interfaces, FBP interface, SD card slot and LCD display. ABB conformity documentation lists the code as PM581-ARCNET, and listings across major distributors and specialist auctions show consistent descriptions and stock. The ARCNET variant targets installations built on ARCNET networking rather than Ethernet, so it is a like-for-like spare for legacy AC500 cabinets. Refurbished units are commonly offered with multi-month warranty; confirm firmware revision before ordering.