The RP-1700 series Rotary Encoder is provided with COM and F.G. as a common terminal.
Grounding F.G. is effective for the following;
• The prevention of noise emitted from the rotary encoder
• The prevention of external noise entering the rotary encoder
Therefore, grounding F.G. could enable a stabilized operation of the rotary encoder and may decrease any influence to external devices.
Please read "Installing the Rotary Encoder" in the instruction manual and follow the procedures and cautions during installation.