Based on the part number provided, this refers to a series of **Miniature Magnetic Proximity Sensors** (often Reed Switch based) commonly used in industrial automation, pneumatic cylinders, and security systems. Below is the breakdown of the electronic components and technical specifications associated with the **HMS-E-R/Q** series. --- ### 1. Component Breakdown The HMS-E-R/Q series typically utilizes **Reed Switch** technology. These are passive electronic components that react to a magnetic field. | Feature | Description | | :--- | :--- | | **Switching Element** | Hermetically sealed glass reed switch. | | **Housing Material** | Polyamide (PA) or Aluminum, depending on the specific sub-model. | | **Connection Type** | **R**: Round cable (usually PVC) / **Q**: M8 or M12 Quick-disconnect connector. | | **Circuit Type** | Normally Open (NO) is standard; Change-over (SPDT) available in some variants. | --- ### 2. Technical Specifications These sensors are designed for low-power switching and signal feedback. | Parameter | Typical Value | | :--- | :--- | | **Max Switching Voltage** | 100V - 250V AC/DC (varies by specific model) | | **Max Switching Current** | 0.5A | | **Max Switching Capacity** | 10W / 10VA | | **Contact Resistance** | < 150 mΩ | | **Operating Temperature** | -20°C to +80°C | | **Protection Class** | IP67 (Dust tight and waterproof) | --- ### 3. Electronic Design Variants The suffix **R** and **Q** define the physical electronic interface: #### **HMS-E-R (Cable Version)** * **Electronics:** Consists of the reed contact wired directly to a multi-core cable. * **Application:** Permanent installations where space is limited and connectors are not required. #### **HMS-E-Q (Connector Version)** * **Electronics:** Features a built-in male plug (usually M8). * **Advantage:** Easier maintenance; if the sensor fails, the cable remains in place, and only the sensor head is replaced. --- ### 4. Typical Wiring Diagram The internal circuit is simple, acting as a voltage-free contact. ```mermaid graph LR A[Power Input] --- B{Magnetic Field} B --- C[Load/PLC Input] subgraph Internal Sensor B end ``` * **Brown Wire / Pin 1:** Positive/Live * **Blue Wire / Pin 3:** Load/Neutral * **Black Wire (if 3-wire):** Signal Output --- ### 5. Common Applications * **Pneumatic Cylinders:** Detecting the piston position via a magnet inside the cylinder. * **Safety Interlocks:** Monitoring if a door or hatch is closed. * **Level Sensing:** Used in conjunction with a magnetic float.