The **ENC1J-D20-R00064L** is a precision optical rotary encoder manufactured by **Bourns**. It is part of the EN series, designed for applications requiring high reliability and a long cycle life compared to mechanical contact encoders. --- ### ## Technical Specifications Below are the core technical parameters for the ENC1J-D20-R00064L: | Feature | Specification | | :--- | :--- | | **Encoder Type** | Optical Rotary Encoder | | **Output Type** | Quadrature (Incremental) | | **Resolution** | 64 Pulses per Revolution (PPR) | | **Supply Voltage** | 5.0 VDC ± 0.25V | | **Supply Current** | 26 mA (Maximum) | | **Operating Life** | Up to 10,000,000 cycles | | **Mounting Type** | Panel Mount | | **Shaft Diameter** | 1/4" (approx. 6.35mm) | | **Termination Style** | PC Pin or Ribbon Cable compatible | --- ### ## Part Number Breakdown Understanding the specific nomenclature of this model: * **ENC**: Series designation (Optical Encoder). * **1J**: Package style (Single cup, bushing mount). * **D20**: Physical configuration (Dimensions of the housing and shaft style). * **R**: Termination (Rear exit pins). * **00064**: Resolution (64 pulses per channel per revolution). * **L**: RoHS Compliant. --- ### ## Key Features & Functionality #### 1. Optical Technology Unlike mechanical encoders that use metal brushes, this part uses an **LED light source** and a photodiode array. This eliminates contact bounce and significantly extends the life of the component, as there is no physical wear on the sensing elements. #### 2. Quadrature Output It provides two channels (Channel A and Channel B) that are 90 degrees out of phase. This allows the connected microcontroller (like an Arduino or PLC) to determine both the **speed** of rotation and the **direction** (clockwise vs. counter-clockwise). #### 3. High Reliability Because it is optical, it is highly resistant to "noise" generated by mechanical friction. It is ideal for medical equipment, professional audio mixers, and industrial automation where precision is critical. --- ### ## Typical Connection Diagram The device usually follows a standard 5-pin output configuration: ```text Pin 1: Ground (GND) Pin 2: Channel B (Output) Pin 3: Index (Optional/NC) Pin 4: Channel A (Output) Pin 5: VCC (+5V) ```