The Siemens 6ES7705-0AA00-1BA0 is a SIMATIC S7 programming device plug-in power supply unit, stepping 115 V AC down to 24 V DC for the PG 70X family of field programmers.
What to expect on the line
Designed specifically as a drop-in power supply for the PG 70X programming device, it delivers 24 V DC from a 115 V AC mains input — no adapter or external brick needed.