The **FCR-G0-R** is a series of high-performance **Magnetic Proximity Sensors** (also known as Reed Switches) commonly used in industrial automation, particularly for cylinder position detection. ### Technical Overview These sensors are designed to detect the presence of a magnetic field (usually from a magnet mounted on a pneumatic cylinder piston) to trigger a circuit. | Feature | Specification Details | | :--- | :--- | | **Switching Logic** | SPST (Single Pole Single Throw) - Normally Open | | **Sensor Type** | Reed Switch (Magnetic) | | **Operating Voltage** | 5V to 240V AC/DC | | **Switching Capacity** | 10W Max | | **Switching Current** | 100mA Max | | **Indicator Lamp** | Red LED (activates when the circuit is closed) | | **Protection Rating** | IP67 (Dust and water-resistant) | --- ### Key Electronic Components #### 1. The Reed Switch The heart of the FCR-G0-R is a glass envelope containing two ferromagnetic blades. When a magnetic field approaches, the blades become polarized and pull together, completing the electrical circuit. #### 2. LED Indicator Circuit The "R" in the model often denotes the inclusion of an indicator light. This circuit consists of: * **LED:** Provides visual feedback of the sensor state. * **Current-Limiting Resistor:** Protects the LED from burning out at higher voltages (e.g., 24V). #### 3. Protection Circuitry To ensure longevity in industrial environments, these sensors typically include: * **Varistor/Zener Diode:** To protect the reed contacts from voltage spikes caused by inductive loads. * **Encapsulation:** The internal electronics are potted in epoxy resin to protect against vibration and moisture. --- ### Wiring Configuration The FCR-G0-R typically uses a **2-wire** configuration. Because it acts as a simple mechanical switch, it can be wired in "Sinking" or "Sourcing" logic depending on the load connection. ```markdown [Power +] ---- [Load] ---- [Brown Wire] [Sensor] [Blue Wire] ---- [Power -] ``` **Note:** Always ensure a load is present in the circuit. Connecting a 2-wire reed switch directly across a power supply will cause an overcurrent that will weld the internal contacts shut instantly.