R911309551 is part of the CSH Advanced Control System Series by Indramat Controls.
Specs
Product Name: Bosch Rexroth IndraDrive Drive Controller Type: Configurable Control Section Axis: Single Axis Connectivity: PROFIBUS Network Voltage System: 5V to 50V, Protective Extra-Low Firmware: Required Mount Lifespan: 20 Times Encoder Modules: Two Optional Control Panel: Single-Line Display and Four Keys Device for Voltage Adjustment: Purchase Separately