What it is
The Omron R88ACR1B010NFE is a 10 m encoder cable built to carry the feedback signal between an Omron 1S series servo drive and its matching 1S servo motor. It is listed as an encoder cable accessory, not a power cable, so it ships as the dedicated feedback leg on that motor family.
Where it fits
Encoder cables of this class sit on the drive end of a 1S axis — one end lands on the motor encoder connector, the other on the drive's encoder port. Because the cable is part of the 1S servo motor accessory set, it is the drop-in choice when commissioning a new axis or replacing a damaged run on an existing 1S machine.