R911292674 is part of the DKR Drive Controllers Series by Indramat Drives.
Industrial motors: Common Usage Serial Interface: Additional Feature RS-232 or RS-484: Communication Protocol 3xAC 400 ... 480, ± 10% at 50-60Hz: Rated Input Power AC 230 V, ± 10%, 50-60Hz: Control Power 78-92 Amperes: Nominal Current 30 to 35 kW: Continuous Power 800Hz to 1600Hz: Maximum Frequency