The Sensor+ Control electronics module (Cem+) receives and
manages ethernet control signals as well as two DmX512 inputs. It
controls dimmer output, and communicates feedback information to
compatible lighting control devices and network peripherals.

FEATURES
• Direct ethernet connectivity for dimmer levels, feedback and
system control
• two DmX512 input connections
• rugged industrial construction
• modular design
• local menu-driven User Interface
• two operating modes: Standard and Basic/Portable mode
• 128 Presets with programmable fade times
• System and rack feedback standard
• Support for advanced features (af) dimmer-specific reporting
• Supports etC Dimmer Doubling™

Pulled from a working machine. Has signs of wear but is perfectly functional.