R911271491 is part of the DDS Drive Controllers Series by Indramat Drives.
Product Type: Drive Controller Voltage: ±15 or 24 VDC Slots for I/O Modules: 5 Basic Unit Slot U5: DSM02.1 Firmware Module Slots U2-U4: Empty Power Loss: 200 - 1100 mA Communication Interface: ANALOG Current Consumption: 50 A Suited AC motors: MKD, MDD, and Linear Ideal Operating Temperature: 0 to +45 degree Celsius Protection Category: IP10 Motor Feedback: Digital Servo Feedback Heat Dissipation Method: To Ambient Ai