The **E3S-R66** is a high-performance photoelectric sensor manufactured by Omron, specifically designed for the detection of transparent objects (like glass or PET bottles). Below is a breakdown of its electronic specifications and characteristics. --- ### 1. General Specifications The E3S-R66 belongs to the E3S-R family of sensors, characterized by its specialized optical system that prevents "burn-through" (where light passes through a transparent object without being detected). | Feature | Specification | | :--- | :--- | | **Sensing Method** | Retro-reflective with MSR (Mirror Surface Rejection) | | **Sensing Distance** | 100 mm to 1 m (with E39-R1 reflector) | | **Light Source** | Infrared LED (880 nm) | | **Supply Voltage** | 10 to 30 VDC (includes 10% ripple p-p) | | **Current Consumption** | 40 mA maximum | --- ### 2. Output and Circuitry The sensor uses a solid-state switching output designed for industrial PLC interfaces. * **Output Type:** NPN / PNP (Depending on model variant, though the R66 is typically NPN/PNP selectable or fixed NPN depending on the regional datasheet). * **Control Output:** 100 mA max at 30 VDC. * **Response Time:** 1 ms Max (Operate or Release). * **Circuit Protection:** * Reverse polarity protection. * Output short-circuit protection. * Mutual interference prevention (allows sensors to be mounted close together). --- ### 3. Connection Pinout (M12 Connector) The E3S-R66 usually features a 4-pin M12 plug-in connector. | Pin Number | Wire Color | Function | | :--- | :--- | :--- | | 1 | Brown | +V (10-30 VDC) | | 2 | White | L-ON / D-ON Selection | | 3 | Blue | 0V (GND) | | 4 | Black | Output | --- ### 4. Key Electronic Features * **Sensitivity Adjustment:** It features a 2-turn endless adjustment trimmer, allowing for fine-tuning when detecting thin films or clear glass. * **Operation Mode:** Supports **Light-ON** and **Dark-ON** modes, usually selectable via the wiring of the control lead. * **Stability Indicator:** Includes a green LED (stability) and a red LED (operation), allowing the user to see if the signal is strong enough to avoid false triggering due to environmental changes. ---