The **ISC35** typically refers to a high-performance **Optical Incremental Encoder** (specifically the 35mm diameter series). These components are widely used in motion control systems to provide feedback on speed, position, and direction. Below is an explanation of the internal electronic parts and specifications of the ISC35 series. --- ### 1. Internal Electronic Components The ISC35 functions by converting mechanical rotation into electrical pulses using an optoelectronic process. | Component | Function | | :--- | :--- | | **Light Emitting Diode (LED)** | The light source (usually infrared) that shines through the encoder disk. | | **Optical Disk (Code Wheel)** | A rotating disk with precise slits that "chops" the light into pulses. | | **Photodetector Array** | A sensor that receives light and converts it into a weak electrical signal. | | **Signal Processing IC** | Amplifies the sensor signal and converts it into a square wave (A, B, Z phases). | | **Output Driver (ASIC)** | Dictates how the signal is sent to the PLC (e.g., Push-Pull or Line Driver). | --- ### 2. Output Signals and Phases The electronics are designed to output specific pulse patterns: * **Phase A and B:** Two square waves offset by 90° (quadrature). This allows the controller to determine the **direction** of rotation. * **Phase Z (Index):** A single pulse per revolution used to establish a **home position** or reference point. * **Complementary Signals:** In "Line Driver" models, signals like $\bar{A}$, $\bar{B}$, and $\bar{Z}$ are generated to cancel out electrical noise. --- ### 3. Electronic Specifications When selecting or repairing an ISC35, these electronic parameters are critical: | Parameter | Typical Range / Value | | :--- | :--- | | **Supply Voltage (Vcc)** | 5V DC or 8V - 24V DC | | **Current Consumption** | $\leq$ 60mA | | **Output Type** | Open Collector, Push-Pull, or RS422 Line Driver | | **Frequency Response** | 0 ~ 100 kHz | | **Resolution** | 100 to 3600 Pulses Per Revolution (PPR) | --- ### 4. Wiring Diagram (Common Standards) The electronic interface usually follows a standard color-coding for its cable: ```text Red : Vcc (Power +) Black : 0V (GND) Green : Phase A White : Phase B Yellow: Phase Z Shield: G (Ground/Shielding) ``` --- ### 5. Application Integration The electronics of the ISC35 are designed to interface with: * **PLCs (Programmable Logic Controllers):** Using High-Speed Counter inputs. * **Inverters/VFDs:** For closed-loop motor speed control. * **Microcontrollers:** (Arduino/STM32) via optoisolators if voltage levels differ.