## Overview of the EE-SX911P-R The **EE-SX911P-R** is a high-performance, non-modulated Photomicrosensor (photointerrupter) manufactured by OMRON. It is specifically designed for industrial automation, offering high reliability in a compact "L-shaped" (Slot-type) form factor. ### Technical Specifications The following table outlines the primary electrical and mechanical characteristics of the device: | Property | Specification | | :--- | :--- | | **Sensing Method** | Transmissive (Slot-type) | | **Sensing Distance** | 5 mm (Slot width) | | **Output Type** | PNP Open Collector | | **Operation Mode** | Light-ON / Dark-ON (Selectable) | | **Power Supply Voltage** | 5 to 24 VDC ±10% | | **Current Consumption** | 15 mA max. | | **Response Frequency** | 1 kHz min. (3 kHz average) | | **Connection Method** | Pre-wired (Robot cable / Flexible cable) | | **Indicator** | Incident Light Indicator (Orange LED) | --- ### Key Electronic Components & Features #### 1. PNP Open Collector Output The "P" in the model name signifies **PNP output**. This is common in European industrial standards. When the sensor is triggered, it switches the positive side of the power supply to the load. * **Load Current:** Usually supports up to 50 mA or 100 mA depending on the voltage. * **Protection:** Includes output short-circuit protection. #### 2. Light-ON / Dark-ON Selection This sensor features a dedicated input wire (usually pink) that allows the user to toggle the logic: * **Light-ON:** Output is active when the sensing slot is clear. * **Dark-ON:** Output is active when an object is detected in the slot. #### 3. Robot Cable (R-Suffix) The **"-R"** suffix indicates that the sensor is equipped with a **high-flex "Robot Cable"**. * **Durability:** Designed to withstand repeated bending and twisting. * **Application:** Ideal for moving parts such as robotic arms, pick-and-place heads, or reciprocating slides. #### 4. Non-modulated Infrared Light The sensor uses a non-modulated infrared LED and phototransistor pair. This allows for an extremely high response frequency (up to 3 kHz), making it suitable for high-speed counting or RPM sensing. --- ### Wiring Configuration | Wire Color | Function | Description | | :--- | :--- | :--- | | **Brown** | Vcc | Positive Power Supply (5 - 24 VDC) | | **Blue** | GND | 0V / Ground | | **Black** | Output | PNP Open Collector Output | | **Pink** | L/D Selection | Connect to Vcc for one mode, or leave open/GND for the other | --- ### Application Usage Because of its high speed and flexible cable, it is typically used for: 1. **Origin Detection:** Finding the "Home" position of a motor-driven axis. 2. **Limit Sensing:** Preventing over-travel on linear rails. 3. **Disk Encoding:** Counting pulses from a rotating slotted disk to measure speed.