The **FT-R44Y** is a high-performance **Fiber Optic Unit** manufactured by **Panasonic (formerly SUNX)**. It belongs to the FT/FD series of fiber sensors designed for use with digital fiber amplifiers. --- ## 1. Technical Specifications The FT-R44Y is a **Through-beam type** fiber unit characterized by its "side-view" square head design. | Feature | Specification | | :--- | :--- | | **Sensing Type** | Through-beam (Emitter and Receiver) | | **Shape** | Square Head (Side-view) | | **Fiber Length** | 2 meters (Standard) | | **Fiber Diameter** | Ø 1.0 mm | | **Minimum Bend Radius** | R1 mm (High-flex / Tough fiber) | | **Ambient Temperature** | -55°C to +80°C | | **Material** | Stainless steel (head), Polyethylene (cable sheath) | --- ## 2. Key Components & Materials ### A. The Optical Fiber Core The unit uses a **Plastic Fiber** core. Unlike glass fibers, plastic fibers are more flexible and can be cut to a specific length using a specialized fiber cutter (usually the FX-AT15). ### B. The Sensing Head (Side-View) The "Y" in the model name often denotes the specific orientation or the integrated bracket style. The FT-R44Y features a **Square Head** design: * **Housing:** Typically made of SUS303 (Stainless Steel) for durability. * **Lens Compatibility:** It can be fitted with expansion lenses (like the FX-LE1 or FX-LE2) to increase the sensing distance or narrow the beam. ### C. The "Tough Fiber" Technology One of the most significant electronic/mechanical features is the **R1 mm bending radius**. * **Multi-core Structure:** Instead of one thick core, it uses hundreds of micro-cores. * **Benefit:** This prevents the fiber from breaking or losing light intensity when bent sharply around tight corners in robotic arms or small machinery. --- ## 3. Application in Electronic Systems To function as an electronic system, the FT-R44Y must be paired with a **Digital Fiber Amplifier** (e.g., Panasonic FX-100 or FX-500 series). 1. **Light Emission:** The amplifier sends a modulated light pulse through the Emitter fiber. 2. **Detection:** If an object breaks the beam, the Receiver fiber carries the remaining light back to the amplifier's photodiode. 3. **Signal Output:** The amplifier converts the optical change into an electrical signal (NPN/PNP output or Analog). --- ## 4. Maintenance and Installation Tips * **Cutting:** Always use a sharp, dedicated fiber cutter to ensure the cross-section is perpendicular. A jagged cut will cause significant "Light Loss." * **Mounting:** Use the M3 mounting holes on the square head. Ensure the Emitter and Receiver are perfectly aligned for maximum sensing range. * **Cleaning:** Use a dry, lint-free cloth on the sensing face. Avoid harsh chemicals that may cloud the plastic lens.