The **JR-56-R/BL** refers to a specific type of **illuminated industrial push button switch**, typically used in control panels, machinery, and automation systems. Below is a breakdown of its electronic and mechanical components. ### 1. General Specifications The model name usually encodes the physical and electrical characteristics of the switch: | Component | Specification | Description | | :--- | :--- | :--- | | **Model Series** | JR-56 | Standard 16mm or 22mm mounting series (varies by brand). | | **Color Code (R/BL)** | Red / Blue | Indicates the lens color or dual-LED configuration. | | **Action Type** | Momentary / Latching | Usually momentary (springs back after press). | | **Contact Form** | 1NO 1NC / 2NO 2NC | Refers to the internal silver alloy contacts. | --- ### 2. Key Electronic Components #### A. The Contact Block This is the "switching" part of the device. It typically uses high-conductivity materials to handle load currents. * **Terminals:** Usually screw-type or solder-lug terminals. * **Rated Voltage (Ui):** Typically rated up to 250V AC or 440V AC. * **Thermal Current (Ith):** Usually rated between 5A and 10A. * **Material:** Often silver-plated copper to reduce electrical resistance and prevent oxidation. #### B. The Illumination Unit (LED) The "R/BL" suffix indicates the lighting component. * **Light Source:** Integrated LED (Light Emitting Diode). * **Input Voltage:** Common variants include 12V DC, 24V DC, or 110V/220V AC. * **Circuitry:** Includes an internal current-limiting resistor to protect the LED from burning out at the rated voltage. #### C. Insulation and Housing * **Material:** PA66 (Nylon) or Polycarbonate (PC) for flame retardancy. * **Protection Rating:** Usually IP40 or IP65 (dust-tight and protected against water jets). --- ### 3. Wiring Diagram Concept To integrate this part, you generally deal with two separate circuits: ```mermaid graph LR A[Power Source] --> B[Switch Contact Terminal] B --> C[Load/Motor/Relay] D[Light Power Source] --> E[LED + Terminal] E --> F[LED - Terminal] ``` --- ### 4. Technical Summary | Feature | Details | | :--- | :--- | | **Mounting Hole** | 16mm (common for JR-56 series) | | **Switching Life** | >1,000,000 cycles (Mechanical) | | **Insulation Resistance** | ≥100 MΩ | | **Contact Resistance** | ≤50 mΩ |