The **M2RS-3B-R** is a specific model of an **Industrial Miniature Relay** (specifically a Slim Plug-in Power Relay). These are commonly used in automation control panels, PLCs, and interface modules due to their space-saving design. --- ### 1. Technical Specifications Below are the primary electronic and mechanical characteristics of the M2RS-3B-R: | Feature | Specification | | :--- | :--- | | **Contact Configuration** | 1C (SPDT - Single Pole Double Throw) | | **Rated Load (Resistive)** | 6A at 250V AC / 30V DC | | **Coil Voltage** | Typically 24V DC (Verify specific suffix for variations) | | **Contact Material** | Silver Alloy (AgSnO2 is common for this series) | | **Mounting Type** | DIN Rail Socket or PCB Mount | | **Indicator** | LED Status Indicator (standard in "R" series) | --- ### 2. Key Electronic Components & Features #### A. The Coil Unit (Input Side) * **Inductive Element:** A copper wire winding that creates an electromagnetic field when energized. * **Protection Circuit:** The "R" in the part number often signifies a built-in **protection diode** (for DC models) or a **Varistor** (for AC models) to suppress voltage spikes (back-EMF) when the coil is de-energized. * **LED Indicator:** A small surface-mount LED is integrated into the housing to provide visual confirmation that the coil is receiving power. #### B. The Contact System (Output Side) * **Movable Armature:** A mechanical lever moved by the magnetic force of the coil. * **Stationary Contacts:** The "Normally Open" (NO) and "Normally Closed" (NC) terminals. * **Arc Suppression:** Designed to handle 6A, though inductive loads (like motors or solenoids) should be derated or used with external snubbers to prevent contact pitting. --- ### 3. Physical & Design Characteristics * **Slim Profile:** At approximately 6mm width, it allows for high-density mounting on DIN rails. * **Plug-in Structure:** The relay "blade" pins are designed to fit into a socket (like the M2RS-S base), allowing for quick replacement without rewiring. * **Environmental Protection:** Usually features a "Flux-tight" or "Sealed" construction to prevent dust from contaminating the contact surfaces. --- ### 4. Typical Applications 1. **PLC Output Buffering:** Protecting delicate PLC internal circuits from high-voltage field devices. 2. **Signal Isolation:** Separating control logic (24V) from power circuits (220V). 3. **Industrial Automation:** Controlling small motors, valves, and lighting.