The **E3JB** series is a robust line of photoelectric sensors manufactured by OMRON. These sensors are known for their heavy-duty design, built-in power supply, and versatility in industrial automation environments. --- ### 1. Key Electronic Components & Features The E3JB is a "built-in power supply" sensor, meaning it contains its own voltage conversion circuitry. | Component / Feature | Description | | :--- | :--- | | **Power Supply** | Supports multi-voltage input (typically **24 to 240 VAC** or **12 to 240 VDC**). | | **Output Type** | Usually features a **Relay Output** (SPDT) for high current switching. | | **Light Source** | Uses an **Infrared LED** (Non-visible) or **Red LED** (Visible). | | **Sensitivity Adjustment** | Equipped with a **Potentiometer** (Trimmer) for fine-tuning the detection range. | | **Indicator LEDs** | Includes a **Stability indicator** (Green) and **Operation indicator** (Orange/Red). | --- ### 2. Sensing Methods The E3JB series is categorized by how the electronic beam interacts with the target: 1. **Through-beam (E3JB-T):** Consists of a separate Emitter and Receiver. Best for long-distance sensing. 2. **Retro-reflective (E3JB-R):** The beam reflects off a mirror (reflector) back to the sensor. Detects objects that break the beam. 3. **Diffuse-reflective (E3JB-D):** The beam reflects directly off the object being detected. --- ### 3. Connection and Wiring The E3JB typically uses a terminal block for wiring, which is accessible by removing the back cover. ```markdown Terminal Wiring Logic: 1. Power Input (L/+) 2. Power Input (N/-) 3. Common (COM) - Relay Contact 4. Normally Closed (NC) - Relay Contact 5. Normally Open (NO) - Relay Contact ``` --- ### 4. Technical Specifications Typical values for the E3JB series: * **Response Time:** 30 ms maximum (for relay output models). * **Enclosure Rating:** IP66 (Water and dust resistant). * **Operating Mode:** Light-ON / Dark-ON (Selectable via switch). * **Housing Material:** ABS (Acrylonitrile Butadiene Styrene) for high impact resistance.