The **M2UDS2-FWB-R/N** is a specific model within the industrial automation and control component category, typically manufactured by companies like **IDEC** (specifically within their 22mm Twin-Touch or Pushbutton series). This part number refers to a **Twin-Touch Dual Pushbutton Switch**. Below is a breakdown of its electronic and mechanical parts. --- ### 1. Part Number Breakdown To understand the electronic capabilities, we must decode the nomenclature: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **M2U** | Series Type | IDEC 22mm Twin-Touch Series | | **DS2** | Operator Type | Dual Flush Buttons (Flush/Extended) | | **FWB** | Color/Function | Top: Green (Flush), Bottom: Red (Extended) | | **R/N** | Contact Blocks | Standard configuration of Normally Open (NO) and Normally Closed (NC) | --- ### 2. Electronic Specifications These components are designed for industrial control circuits (Pilot Duty). * **Contact Rating:** Usually rated for **600V AC/DC**. * **Thermal Current ($I_{th}$):** Typically **10A**. * **Operational Voltage:** * AC: 120V, 240V, 480V. * DC: 125V, 250V. * **Contact Resistance:** Maximum 50mΩ (initial value). * **Insulation Resistance:** 100MΩ minimum (500V DC megger). --- ### 3. Key Electronic Components #### A. Contact Blocks The "R/N" suffix indicates the arrangement of the contact blocks mounted to the back of the actuator: * **Normally Open (NO):** Used for the "Start" (Green) function. The circuit closes when pressed. * **Normally Closed (NC):** Used for the "Stop" (Red) function. The circuit opens when pressed. * **Gold-Clad Silver Contacts:** Designed for high reliability in both high-power and low-level logic circuits. #### B. Illumination (Optional depending on sub-variant) If the unit is illuminated (often indicated by an "L" in extended part numbers, though the base M2UDS2 is often non-illuminated), it contains: * **LED Module:** A removable light engine that operates on 6V, 12V, 24V, or 120/240V AC. * **Current Limiting Resistor:** Integrated into the LED module to prevent burnout. #### C. Terminal Design * **Screw Terminals:** Features "M3.5" hardware with captive wire clamps (IP20 finger-safe protection). * **Wiring Capacity:** Supports 14 AWG to 22 AWG solid or stranded wire. --- ### 4. Environmental & Durability | Feature | Rating/Detail | | :--- | :--- | | **Protection Degree** | IP65 (Waterproof/Dust-tight from the front) | | **Mechanical Life** | 5,000,000 operations | | **Electrical Life** | 100,000 operations (at full load) | | **Operating Temp** | -25°C to +50°C | --- ### 5. Application Circuit Example In a standard motor control application: 1. **Green Button (NO):** Wired to a Magnetic Contactor coil to "Pull In" the motor. 2. **Red Button (NC):** Wired in series with the Green button to "Drop Out" the motor circuit in case of a stop command.