XF204-2BA IRT managed IE IRT switch, 4 x 10/100 Mbit/s, 2 x Bus adapter interface , error signaling contact, with set pushbutton, redundant 24 V DC power supply, PROFINET IO device, network management, Redundancy Manager integrated, incl. electron. manual on CD-ROM, C-PLUG optional. Switch to the future - SCALANCE X.