The **KPRU-22-R** is a specific type of **Control Relay** or **Auxiliary Relay**, commonly used in industrial automation and electrical control panels. These devices act as electrically operated switches, allowing a low-power signal to control a much higher power circuit. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series of industrial relays, here are the primary electronic characteristics: | Parameter | Typical Specification | |:---|:---| | **Contact Configuration** | 2 Changeover (2C/O) or DPDT (Double Pole Double Throw) | | **Contact Rating** | 5A to 10A at 250V AC / 28V DC | | **Coil Voltages (R)** | Usually signifies **AC** or **DC** options (check specific suffix) | | **Mounting Type** | Plug-in type (usually for 8-pin or 11-pin bases) | | **Terminal Material** | Silver Alloy (AgNi or AgSnO2) for high conductivity | --- ### 2. Functional Components The KPRU-22-R consists of several internal electronic and mechanical parts: 1. **Electromagnetic Coil:** When energized, it creates a magnetic field that pulls the armature. 2. **Armature:** The moving part that physically shifts the contact positions. 3. **Contacts:** * **NO (Normally Open):** Connects when the relay is powered. * **NC (Normally Closed):** Disconnects when the relay is powered. * **COM (Common):** The shared terminal between NO and NC. 4. **LED Indicator:** Most "R" series relays include a small LED to show the excitation state of the coil. 5. **Return Spring:** Ensures the contacts return to their original state once power is removed. --- ### 3. Application Use Cases The KPRU-22-R is utilized in various electronic control environments: * **PLC Interfacing:** Using a 24V DC PLC output to switch a 220V AC motor starter. * **Logic Isolation:** Separating sensitive electronic control circuits from "noisy" high-voltage power circuits. * **Signal Multiplication:** One input signal can trigger two separate outputs simultaneously due to the 2C/O configuration. --- ### 4. Circuit Diagram Representation In a schematic, the part is represented as follows: ```text [Coil A1] ----( L )---- [Coil A2] Contact Set 1: Contact Set 2: (11) COM (21) COM | | (12) NC / (14) NO (22) NC / (24) NO ``` ---