R911331161 is part of the CSH Advanced Control System Series by Indramat Controls.
Specs
Function: Control sections for IndraDrive controllers Compatibility: Supports 12V encoders Encoder Interface Types: D-sub type with 15 poles Communication Module: IEEE 802.3 standard cross communication module Operating Frequencies: 2 kHz, 4 kHz, 8 kHz, 12 kHz, and 16 kHz