Between the 1.5 kW light sections and the 3 kW heavy ones sits the 2.2 kW band — often the most numerous rating on a conveyor line, and the one the 2XH62-2AA0 build of the SINAMICS G115D addresses on the AS-i trunk: 5.9 A rated in LO duty (11.8 A HO), convection-cooled, mounted at the section.

What makes 2.2 kW the volume rating for AS-i lines?

It is the tier where sections start carrying real tonnage while still fitting the node budget. The trunk carries only the control conversation — setpoint, run command, faults — at a few bytes per scan, so a line full of 2.2 kW nodes cycles exactly as fast as a line of 0.37 kW ones. Each node takes mains through its own gland, and the integrated 24 V PSU plus C2 filter keep the section electronics and emissions self-contained.

What does the FSB frame give the 2.2 kW tier that the small frames do not?

Electrical headroom in the same convection-cooled concept. The 425 x 240 x 134 mm housing holds the 5.9 A LO rating without a fan — no intake to clear, no filter to service — while the 11.8 A HO capacity and 200%/3 s starting envelope cover loaded belt starts. If a section outgrows the rating, the 3 kW 2XH63 build takes the same trunk and one housing step up; if it needs plant-Ethernet diagnostics instead, the 2AF0 build swaps in on the identical footprint.