R911379378 is part of the HCS Compact Converters / Drive Controllers Series by Indramat Drives.
Specs
Product Name: Bosch Rexroth HCS01.1E Drive Controller Company: Bosch Rexroth Parts: Control Section, Power Section Onboard Cooling: Performance Dependent Fan Failure Reaction: Shut Down on Winding Short Circuit Installation: Can be installed in separate control cabinet Operating Temperature: 0 - 40 degrees Celsius Moisture Sensitivity: Yes Pollution Sensitivity: Yes Service: Available from Indramat USA