The **FT120T-R** is an advanced electronic component primarily used in industrial sensing, specifically within **Photoelectric Sensors** (often associated with brands like Sensopart or similar automation manufacturers). It is a through-beam or retro-reflective sensor head depending on the specific series configuration. Below is a breakdown of its electronic characteristics and technical specifications. --- ## 1. Core Technical Specifications The FT120T-R is characterized by its miniature housing and high-precision optical performance. | Parameter | Specification | | :--- | :--- | | **Sensor Type** | Photoelectric (Transmitter/Receiver) | | **Light Source** | Red Light (typically 650nm) or Infrared | | **Operating Voltage** | 10 ... 30 V DC | | **Output Type** | PNP or NPN (Push-Pull options available) | | **Switching Frequency** | Up to 1000 Hz | | **Connection Type** | M8 plug (4-pin) or Cable | | **Housing Material** | ABS / Polycarbonate | | **Protection Class** | IP67 (Water and Dust resistant) | --- ## 2. Key Electronic Features ### A. The Optical System The "T" in the part number often signifies the **Transmitter** unit. It uses a high-intensity LED or Laser diode to emit a beam. * **Beam Shape:** Usually a circular light spot, designed for small part detection. * **Adjustment:** Features a potentiometer or teach-in button for sensitivity adjustment, allowing the electronics to compensate for dusty environments. ### B. Circuit Protection The internal electronics are designed for rugged industrial environments and include: * **Short-circuit protection:** Prevents damage if the output is grounded. * **Reverse polarity protection:** Protects the sensor if the DC power leads are swapped. * **Overload protection:** Ensures the internal switching transistor does not burn out during current spikes. ### C. Signal Processing The sensor utilizes internal **ASIC (Application Specific Integrated Circuit)** technology to filter out ambient light interference (such as sunlight or overhead factory lighting), ensuring the receiver only reacts to the specific frequency of the transmitter. --- ## 3. Wiring Diagram Representation For the standard M8 4-pin version, the electronic pinout generally follows the industry standard: ```text Pin 1: Brown (+) --> 10-30V DC Pin 2: White (NC) --> Not Connected or Teach-in Pin 3: Blue (-) --> 0V (GND) Pin 4: Black (Q) --> Digital Output (Switching signal) ``` --- ## 4. Typical Applications * **Packaging Industry:** Detecting the presence of bottles or boxes on a conveyor. * **Robotics:** End-of-arm tooling to detect part pickup. * **Electronics Assembly:** Monitoring the flow of small PCBs.