What this terminal base does in an AC500 V3 rack
The ABB 1SAP111300R0278 (TB5610-2ETH) is the terminal base that anchors the AC500 V3 CPU or interface module. It gives you one slot for a communication module plus onboard connectivity: two Ethernet ports, one serial interface, and one CAN interface — so you can run the fieldbus slice without burning an expansion slot.
Active lifecycle — no scavenger hunt
This part is still rolling off the line. Active lifecycle means you're not chasing NOS pallets or auction lots for it; it's a regular-order item that shows up on the manifest consistently. Document that BOM line with confidence.
One slot for the communication module leaves room for a second Ethernet or PROFIBUS adapter without crowding the backplane. The two onboard Ethernet ports handle CPU-to-HMI or CPU-to-drive traffic directly; the serial and CAN lines cover legacy or motion bus drops. DC input simplifies power supply selection in the cabinet. IP20 keeps dust out of the terminals but doesn't tolerate washdown environments.