The **DRS-G-R/E2** is a specific model of a **magnetic reed sensor**, typically used in industrial automation for position sensing, limit switching, and pneumatic cylinder control. It is characterized by its high sensitivity and durability in harsh environments. --- ### 1. Key Technical Specifications The following table summarizes the primary electronic characteristics of the DRS-G-R/E2: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Switching Type** | Reed Switch | SPST (Normally Open) | | **Operating Voltage** | 5V – 240V AC/DC | Wide voltage compatibility | | **Switching Current** | 100 mA (Max) | For signaling/low-power relay control | | **Contact Capacity** | 10W | Maximum power rating | | **Internal Voltage Drop** | ≤ 2.5V | Voltage loss across the sensor | | **Response Time** | ≤ 1.0 ms | High-speed switching | | **Indicator** | Red LED | Visual status for "On" state | --- ### 2. Electronic Components & Design The device is composed of several critical internal and external parts: #### A. The Reed Switch Element The heart of the sensor is a glass-encapsulated reed switch. It consists of two ferromagnetic blades that move together to close the circuit when a magnetic field (from a piston or external magnet) is present. #### B. LED Indicator Circuit An internal **Light Emitting Diode (LED)** is wired in series with the switch. This provides an immediate visual diagnostic: * **LED On:** The magnetic field is detected, and the circuit is closed. * **LED Off:** No magnetic field detected, or there is a power failure. #### C. Protection Components To ensure longevity in industrial settings, the DRS-G-R/E2 often includes: * **Varistors/Diodes:** To protect the contacts from back-EMF (voltage spikes) caused by inductive loads. * **Encapsulation:** The internal electronics are potted in epoxy resin to protect against vibration, moisture, and dust. #### D. Connection Interface The "E2" designation usually refers to the wiring configuration: * **Type:** 2-wire configuration. * **Polarity:** Non-polar (though the LED may require correct orientation depending on the specific sub-model wiring). --- ### 3. Wiring Diagram (Simplified) When integrating this sensor into a PLC or Relay circuit, the connection follows this logic: ```text [Power Source (+)] ---- [Load (Relay/PLC Input)] ---- [DRS-G-R/E2 Sensor] ---- [Power Source (-)] ``` > **Note:** Because this is a 2-wire sensor, there is a small "leakage current" even when the switch is off (to power the LED if applicable) and a "voltage drop" when the switch is on. Ensure your PLC input threshold is compatible.