The **E3F2-R2RC41-M** is a high-performance, cylindrical photoelectric sensor manufactured by Omron. It belongs to the E3F2 series, which is known for its durability and standardized M18 housing. --- ### ## Technical Specifications The following table summarizes the key electronic and physical attributes of the sensor: | Feature | Specification | | :--- | :--- | | **Sensing Method** | Retro-reflective (requires a reflector) | | **Sensing Distance** | 0.1 to 2.0 meters (with E39-R1 reflector) | | **Supply Voltage** | 10 to 30 VDC (includes 10% ripple) | | **Output Type** | NPN Open Collector | | **Output Mode** | Selectable Light-ON / Dark-ON | | **Current Consumption** | 30 mA maximum | | **Response Time** | 2.5 ms maximum | | **Connection Method** | M12 Connector (4-pin) | | **Housing Material** | Plastic (ABS) / Brass-Nickel plated versions available | --- ### ## Electronic Component Breakdown #### 1. Light Source and Detection This sensor utilizes an **Infrared LED** as its light source. In a retro-reflective setup, the light beam is emitted, bounces off a specialized reflector, and returns to the receiver in the same sensor head. If an object breaks this beam, the circuit triggers the output. #### 2. NPN Output Circuitry The "C41" designation indicates an **NPN Open Collector** output. - When the sensor is triggered, the output wire is pulled to the **negative (0V)** rail. - It can handle a load current of up to **100 mA**. - It is ideal for interfacing with PLCs that have sourcing inputs or driving small DC relays. #### 3. Protection Circuits The E3F2-R2RC41-M includes several internal protective layers to ensure longevity: * **Reverse Polarity Protection:** Prevents damage if the power wires are swapped. * **Output Short-Circuit Protection:** Protects the internal transistor if the output is accidentally grounded. * **Mutual Interference Prevention:** Allows two sensors to be mounted in close proximity without triggering each other. --- ### ## Connection Pinout (M12 Connector) Since this is the "-M" version (Connector type), the pin configuration typically follows the industry standard: | Pin Number | Wire Color (Typical) | Function | | :--- | :--- | :--- | | **1** | Brown | +V (10-30 VDC) | | **2** | White | Control Input (L-ON/D-ON Select) | | **3** | Blue | 0V (Ground) | | **4** | Black | Output (NPN) |