## Overview of XCSDMP79110 The **XCSDMP79110** is a coded magnetic safety switch manufactured by **Telemecanique Sensors** (part of the Schneider Electric ecosystem). It is primarily used in industrial safety applications to monitor the status of movable guards, gates, and covers. ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Product Type** | Coded Magnetic Safety Switch | | **Contact Configuration** | 2 NC (Normally Closed) + 1 NO (Normally Open) | | **Housing Material** | Rectangular Plastic (Compact) | | **Cable Length** | 10 Meters (Standard) | | **Operating Voltage** | 24V DC | | **Switching Distance** | Sao: 8 mm (Assured operating distance) | | **Breaking Distance** | Sar: 20 mm (Assured release distance) | | **Protection Rating** | IP66 / IP67 (Water and Dust Resistant) | --- ### 2. Electronic Components & Internal Logic The "Electronic" nature of this device differs from a standard mechanical limit switch. Because it is a **coded magnetic** device, it relies on specific magnetic fields to trigger the internal solid-state or reed-based components. #### A. Coded Magnetic Actuation Unlike a simple magnet that can be tricked by a piece of steel or a generic magnet, the XCSDMP79110 requires a specific **coded actuator** (usually the XCSZP1). The internal electronic sensors are arranged to detect a specific polar pattern, preventing "defeat" or tampering by unauthorized magnets. #### B. The Contact Configuration (2NC + 1NO) This part number features a three-contact arrangement: * **2 NC (Safety Contacts):** These are used in the safety circuit. When the guard is closed, these contacts are held closed. If the guard opens, the circuit breaks, triggering the Safety Relay. * **1 NO (Signaling/Auxiliary):** This is typically used for PLC input or an HMI light to indicate the status of the door without affecting the safety category of the machine. #### C. Pre-wired Connection The "10" at the end of the part number indicates a **10-meter pre-wired cable**. The internal wires are color-coded to allow for easy integration into a safety control module (like the Preventa XPS range). --- ### 3. Application and Safety Standards The electronic design of the XCSDMP79110 allows it to reach high safety levels when used with a monitoring relay: 1. **Safety Category:** Up to Category 4 (with appropriate monitoring). 2. **Performance Level:** Can reach **PL e** (ISO 13849-1). 3. **Silent Operation:** Since there are no mechanical levers, the electronic switching is silent and resistant to physical wear. 4. **Hygienic Design:** The plastic housing is easy to clean, making it suitable for food processing or pharmaceutical machinery where electronic components must be sealed. --- ### 4. Wiring Diagram (Conceptual) ```yaml Wire Color (Standard) | Function ---------------------|---------------------- Brown / Blue | Contact 1 (NC) Black / White | Contact 2 (NC) Red / Grey | Contact 3 (NO) - Signaling ``` *Note: Always verify specific wire colors against the datasheet provided with the specific batch, as wiring standards can vary by region.*