R911391157 is part of the HCS Compact Converters / Drive Controllers Series by Indramat Drives.
Specs
Product: Drive Controller Optional Modules: Safety Module, Engineering Port Input: Three-phase, 200 to 500 Volts AC Maximum Current Output: 8 Amps Enclosure Rating: IP20 Mounting: Vertical, Inside Cabinet Air Release: Inside Control Cabinet Installation: By Trained Personnel Only