The **XCSDMP79010** is a coded magnetic safety switch manufactured by Schneider Electric under the Telemecanique Sensors brand. It is designed for monitoring the opening of guards and doors on industrial machinery. --- ### ## Technical Specifications Below are the primary electronic and physical characteristics of the XCSDMP79010: | Feature | Specification | | :--- | :--- | | **Contact Type** | 2 NO (Normally Open) + 1 NC (Normally Closed) | | **Actuation Type** | Coded Magnetic | | **Rated Operational Voltage** | 24V DC | | **Switching Current** | 100 mA (Maximum) | | **Connection Type** | Pre-wired Cable (10 meters) | | **Sensing Distance** | 8 mm (Sao) / 20 mm (Sar) | | **Ingress Protection** | IP66 / IP67 | | **Housing Material** | Rectangular Plastic (PPS) | --- ### ### Key Electronic Components & Features 1. **Coded Magnetic Reed Contacts**: Unlike a standard magnet, this device uses a "coded" magnetic field. This means it requires the specific matching magnetic actuator to operate, preventing simple bypass or tampering with a standard hardware store magnet. 2. **Contact Configuration (2 NO + 1 NC)**: * **NO Contacts**: These are used for the safety circuit. When the door is closed and the magnet is present, these contacts close to allow the machine to run. * **NC Contact**: Often used for signaling or PLC feedback to indicate the status of the guard. 3. **Safety Rating**: When connected to an appropriate safety evaluation module (like a XPS safety relay), this switch can achieve up to **Category 4**, **PLe** (EN/ISO 13849-1), or **SIL 3** (EN/IEC 62061). 4. **Short-Circuit Protection**: While the switch itself is a passive magnetic device, it is typically paired with safety relays that perform "pulse testing" to detect short circuits between the two safety channels. --- ### ### Wiring Diagram Logic The device uses a multi-core cable. The internal electronic logic follows this pattern: ```text Safety Channel 1: [Brown - Blue] (NO Contact) Safety Channel 2: [Black - White] (NO Contact) Signaling/Aux: [Red - Green] (NC Contact) ``` *(Note: Always verify specific wire colors against the datasheet provided with the specific manufacturing batch.)* --- ### ### Functional Behavior * **Approach**: As the coded magnet moves within **8mm** of the sensor face, the internal reed switches change state. * **Withdrawal**: When the magnet moves further than **20mm** away, the magnetic force drops below the threshold, and the contacts return to their shelf state (breaking the safety circuit).