R911323491 is part of the CSH Advanced Control System Series by Indramat Controls.
Specs
Type: Control Section Interface: Encoder HSF/RSF interface Supply Voltage Ratings: DC 8V or AC 18.2V peak-peak Safety Technology: I/O module Control Panel: Standard with single-line display Separator: Firmware: User-specific (ordered separately) Compatibility: HMS, HCS02, and HCS03 drive controllers