The **47LAC-160B-R** is a specific model of an **Incremental Rotary Encoder**, typically manufactured by companies like **Nemicon** or specialized industrial sensor brands. It is used to convert the angular position or motion of a shaft into analog or digital signals. Below is a detailed breakdown of its electronic components and specifications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Series** | 47LAC (Large Hollow Shaft Type) | | **Resolution** | 160 Pulses Per Revolution (PPR) | | **Output Phase** | A, B, and Z (Index) phases | | **Output Type** | Complementary / Push-Pull / Open Collector (depending on wiring) | | **Supply Voltage** | Usually 5V DC or 10.8V to 26.4V DC | | **Shaft Diameter** | Approx. 16mm - 20mm (Hollow shaft) | | **Response Frequency** | Up to 100 kHz | --- ### 2. Internal Electronic Components An incremental encoder like the 47LAC-160B-R consists of several critical electronic sub-assemblies: #### A. The Optical System (The "Heart") * **LED Emitter:** An infrared LED that shines light through a rotating disc. * **Code Disc:** A glass or plastic disc with 160 transparent and opaque radial lines. * **Photo-detector Array:** A sensor that receives the light pulses and converts them into low-level electrical currents. #### B. Signal Processing Circuitry * **Comparator/Schmitt Trigger:** These electronic components clean the raw analog signals from the photo-detector, turning them into crisp square waves. * **Phase Shifter:** Creates the "Phase B" signal, which is offset by 90 electrical degrees from "Phase A" to allow the controller to determine the direction of rotation. #### C. Output Driver Stage * **Transistors:** Typically uses NPN or PNP transistors to drive the output signal to the PLC (Programmable Logic Controller) or CNC machine. * **Protection Diodes:** Protects the internal circuitry from reverse polarity and voltage spikes. --- ### 3. Connection Pinout (Typical) While you should always check the specific datasheet provided with the unit, standard wiring for this series follows this logic: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | Vcc | Power Supply (+) | | **Black** | GND | 0V / Common (-) | | **White** | Phase A | Main pulse signal | | **Green** | Phase B | Directional pulse signal | | **Yellow** | Phase Z | Index pulse (once per revolution) | | **Shield** | F.G. | Frame Ground / Noise reduction | --- ### 4. Application Logic The **"160B"** in the part number indicates **160 pulses per revolution**. * If the shaft rotates at 1000 RPM, the electronic output frequency will be: ` (160 pulses * 1000 RPM) / 60 seconds = 2.66 kHz ` * The **"R"** at the end usually denotes a specific cable exit type (Radial) or a specific connector orientation. ---