The **SC100-M20-R/600** is a specific model within the **Sick SC100 series** of high-precision linear encoders. These devices are used for absolute position measurement in industrial automation, utilizing a non-contact magnetic principle. --- ### 1. Technical Specifications The following table highlights the core electronic and mechanical parameters of the device: | Parameter | Specification | | :--- | :--- | | **Measurement Length** | 600 mm | | **Communication Interface** | SSI (Synchronous Serial Interface) | | **Output Type** | RS-422 (Differential) | | **Resolution** | Typically down to 1 µm (depending on controller settings) | | **Supply Voltage** | 10 V DC ... 32 V DC | | **Connection Type** | M12, 8-pin male connector | | **Repeatability** | ± 1 Digit | --- ### 2. Key Electronic Components & Functions #### A. Magnetic Sensing Element The "M" in the model name indicates a **Magnetic** sensing principle. The read head contains a Hall-effect sensor array that detects the magnetic poles of a coded tape (MB100 series). Unlike optical encoders, this electronic system is immune to dust, oil, and humidity. #### B. SSI (Synchronous Serial Interface) The **-R** designation indicates the data protocol. * **Synchronous:** Data transmission is synchronized by a clock signal from the controller (PLC). * **Reliability:** Uses differential signaling (RS-422) which provides high noise immunity over long cable runs. * **Absolute Position:** The electronics provide the exact position immediately upon power-up without needing a reference run (homing). #### C. Signal Processing The internal circuitry performs **interpolation**. It takes the analog sine/cosine signals generated by the magnetic field and converts them into a high-resolution digital position word. --- ### 3. Pinout Configuration (M12, 8-pin) | Pin | Signal | Color (Standard) | Description | | :--- | :--- | :--- | :--- | | 1 | GND | Blue | Ground (0V) | | 2 | +Us | Brown | Supply Voltage (10-32V) | | 3 | Clock + | Yellow | SSI Clock Input (+) | | 4 | Clock - | Green | SSI Clock Input (-) | | 5 | Data + | Pink | SSI Data Output (+) | | 6 | Data - | Grey | SSI Data Output (-) | | 7 | N/C | Blue | Not Connected | | 8 | N/C | Red | Not Connected | --- ### 4. Application Considerations * **EMC Protection:** The housing is typically shielded to prevent electromagnetic interference from high-power motors. * **Environmental Rating:** The electronics are usually rated at **IP67**, meaning they are fully protected against dust and temporary immersion in water.