The **M2SES-1B2-R/CE** is a high-performance **Magnetic Proximity Sensor** (often referred to as a Reed Switch or Magnetically Actuated Switch) manufactured by **Bernstein AG**. These sensors are widely used in industrial automation for non-contact position sensing. --- ### 1. Key Technical Specifications The following table outlines the electronic and mechanical characteristics of the M2SES-1B2-R/CE: | Feature | Specification | | :--- | :--- | | **Switching Type** | Reed Contact (Magnetic) | | **Output Configuration** | NC (Normally Closed) + NO (Normally Open) | | **Switching Voltage (Max)** | 250 V AC/DC | | **Switching Current (Max)** | 1.0 A | | **Switching Capacity (Max)** | 60 VA / 60 W | | **Housing Material** | PA 6.6 (Polyamide), Red | | **Connection Type** | PVC Cable (Length varies by sub-model) | | **Protection Rating** | IP 67 (Dust tight and water immersion) | | **Temperature Range** | -5°C to +70°C | --- ### 2. Electronic Component Breakdown The device operates on the principle of magnetic induction. Here is how the internal electronic parts function: #### A. Reed Switch Elements The core of the sensor consists of two thin metal blades (reeds) enclosed in a hermetically sealed glass tube. - **Operation:** When a magnetic field (from a target magnet) approaches, the reeds are magnetized and either pull together (NO) or push apart (NC). - **Advantage:** Because the contacts are sealed in inert gas, they are resistant to corrosion and sparking. #### B. Contact Configuration (Changeover) The **1B2** designation typically indicates a "Changeover" or "SPDT" (Single Pole Double Throw) configuration. This allows the sensor to: 1. Signal that a door/guard is closed (Path A). 2. Simultaneously signal that the circuit is broken if the magnet is removed (Path B). #### C. Protective Circuitry While not always integrated into the base reed, industrial versions like the /CE variant often include: * **Encapsulation:** The internal electronics are potted in resin to resist high vibration and shock. * **Overload Protection:** Designed to handle inductive loads up to 60VA, though external RC snubber circuits are recommended for high-frequency switching of motors or solenoids. --- ### 3. Application Use-Cases The M2SES series is specifically designed for safety and position monitoring: * **Safety Guards:** Monitoring the position of protective doors on machinery. * **Limit Switching:** Detecting the end-of-travel for pneumatic or hydraulic cylinders. * **Harsh Environments:** Since it is non-contact and IP67 rated, it functions well in oily, dusty, or wet industrial settings. --- ### 4. Wiring Diagram (Generic Representation) ```text [ Brown ] ----------- Common (COM) [ Black ] ----------- Normally Closed (NC) [ Blue ] ----------- Normally Open (NO) ``` *Note: Always refer to the specific wiring label on the cable as color codes can vary based on the manufacturing batch.* ---