The **SES-2CA-R/E2** is a high-performance, compact photoelectric sensor, typically manufactured by companies like **Azbil (formerly Yamatake)**. It belongs to a category of modular sensors where the sensing head is separated from the amplifier unit. Below is a breakdown of its electronic specifications, operating principles, and physical characteristics. --- ## 1. Core Technical Specifications The electronics of the SES-2CA-R/E2 are designed for high-speed detection and industrial reliability. | Feature | Specification | | :--- | :--- | | **Detection Method** | Thru-beam (Requires a separate emitter/receiver) | | **Light Source** | Infrared LED | | **Power Supply** | 12 to 24 V DC ±10% | | **Current Consumption** | Max 30 mA | | **Output Type** | NPN Open Collector (typically) | | **Response Time** | Max 1.5 ms | | **Indicator** | Red LED (Operation Indicator) | --- ## 2. Key Electronic Components ### A. The Optical Emitter/Receiver As a **thru-beam** type sensor, the electronic circuit is split into two parts: * **Emitter:** Uses an Infrared (IR) LED to pulse a beam of light. Pulsing helps the sensor distinguish its own light from ambient light (noise). * **Receiver:** Uses a phototransistor or photodiode to detect the IR beam. ### B. The Amplifier Circuit This specific model often refers to the **sensing head**. The electronic signals are processed to determine if the "Light" is received or "Dark" (interrupted). * **Sensitivity Adjustment:** Contains a potentiometer to tune the distance and object transparency detection. * **Control Output:** The NPN open collector can switch loads up to 100mA, making it compatible with PLCs (Programmable Logic Controllers). --- ## 3. Wiring and Connection The SES-2CA-R/E2 usually employs a multi-core cable for its electronic interface. | Wire Color | Function | Description | | :--- | :--- | :--- | | **Brown** | +V | Positive power supply (12-24V DC) | | **Blue** | 0V | Common / Ground | | **Black** | Output | Control output signal (NPN) | | **Pink** | Mode Selection | Light-ON / Dark-ON selection (depending on sub-model) | --- ## 4. Operational Environment The electronic parts are encapsulated to withstand industrial conditions: * **Protection Rating:** Usually IP66 or IP67 (Dust-tight and water-resistant). * **Circuit Protection:** Includes reverse polarity protection and short-circuit protection to prevent damage during installation. ---