The **AS4V-2-R/UL** refers to a specific series of high-performance **Electromagnetic Solenoid Valves**, commonly used in industrial automation, pneumatic systems, and fluid control. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. Technical Specifications Overview This component is characterized by its modular design and compliance with safety standards. | Feature | Specification Details | | :--- | :--- | | **Component Type** | 4-Way, 2-Position Directional Control Valve | | **Actuation Type** | Single Solenoid (Spring Return) | | **Voltage Rating** | 24V DC / 110V AC / 220V AC (Varies by sub-model) | | **Pressure Range** | 0.15 to 0.8 MPa (21 to 116 PSI) | | **Certifications** | UL Listed (Underwriters Laboratories), CE | | **Lead Wire / Connection** | DIN Connector or Grommet with Lead Wire | --- ### 2. Key Electronic Components The AS4V series integrates several critical electronic parts to ensure reliable switching: * **The Solenoid Coil:** The heart of the device. When energized, it creates a magnetic field that pulls a metal plunger to change the air flow path. * **Encapsulation:** The coil is usually encapsulated in thermoset plastic to protect against moisture, dust, and vibration. * **Surge Suppressor (V-Series):** Often includes a built-in metal oxide varistor (MOV) or diode to protect the PLC (Programmable Logic Controller) from voltage spikes when the coil is de-energized. * **LED Indicator:** Many versions include a small LED within the DIN connector to provide a visual status of whether the valve is receiving power. --- ### 3. Functional Operation The "2-R" designation typically refers to the return mechanism and position: 1. **De-energized State:** The internal spring holds the spool in the default position. 2. **Energized State:** The solenoid overcomes the spring force, shifting the spool to redirect compressed air to the output ports. 3. **UL Rating:** The "UL" suffix indicates that the electronic insulation and housing meet specific fire and electrical safety standards for North American markets. --- ### 4. Wiring Diagram (Conceptual) Most AS4V units use a standard 3-pin DIN configuration: ```text Pin 1: Positive (+) / Line (L) Pin 2: Negative (-) / Neutral (N) Pin 3: Earth Ground (⏚) ``` ---