Lifecycle posture for the BOM line
The R88A-CRU005C: For panel builders freezing a long-running machine, that current status means the cable-side mating accessories and spare-unit spares can be ordered on the usual quoted-to-order cycle through an RFQ, with no PCN substitute to chase into the design yet.
What an FND-X encoder does on the axis
Encoders in the Resolvers & Encoders sub-class feed position and speed data back to a servo drive or motion controller, which is the job the FND-X line performs on a typical Omron servo axis where the drive expects incremental feedback over its dedicated encoder port.