OVERVIEW

Official designation: KEYENCE FU-66 (FU Series, Reflective Fiber Unit)

Role/Application: The FU-66 is an M4 reflective fiber unit with a parallel detection arrangement for stable, high-precision sensing of small objects in compact automation and general industrial environments.

KEY SPECS SUMMARY

Power: N/A (Passive fiber head, requires amplifier unit)

Interfaces / Ports: Connects to a compatible fiber amplifier (e.g., FS-N series)

Indicators: N/A (Indicators on associated fiber amplifier unit)

Operating Temp: Minus 40 to plus 70 degrees C

Platform / Compatibility: Designed for use with KEYENCE Digital Fiber Optic Sensors

Limit: Minimum detectable object 0.005 mm diameter gold wire

Lifecycle: Active, Part of the extensive FU series lineup

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the standard physical size and overall length of the FU-66 fiber unit?

A: The unit has an M4 size head and a 2 meter free-cut fiber unit length.

Wiring & Installation:

Q: What is the minimum allowable bending radius for the FU-66 fiber cable during installation?

A: The minimum allowable bending radius for the fiber is specified as R25 mm.

Troubleshooting & Compatibility:

Q: How is the detection distance for the FU-66 determined or specified for an application?

A: The actual detection distance is dependent on the connected fiber amplifier unit and its settings.

Replacement & Upgrades:

Q: What is the primary functional difference between the FU-66 and a thrubeam type fiber unit?

A: The FU-66 is a reflective type, meaning the same head contains both the emitter and receiver fibers.