The **AS4V-3-R** is a specific type of **vacuum solenoid valve** (often referred to as an ejector or vacuum switch assembly) commonly used in industrial automation and pneumatic systems. It is designed to control the flow of air to generate or release a vacuum. --- ## 1. Component Overview The AS4V-3-R belongs to a category of integrated vacuum modules. It typically combines electrical control (solenoid) with pneumatic mechanical actions. | Feature | Description | | :--- | :--- | | **Type** | Solenoid-operated Vacuum Valve | | **Action** | Normally Closed (NC) or Normally Open (NO) depending on configuration | | **Input Voltage** | Typically 24V DC (standard for PLC control) | | **Connector** | Lead wire or M8/M12 plug-in connector | | **Material** | Aluminum alloy body with NBR/FKM seals | --- ## 2. Electronic Specifications The electronic portion of the AS4V-3-R focuses on the **Solenoid Coil** and the **Control Interface**. ### A. Power Requirements * **Operating Voltage:** 24V DC is the industry standard, though some variants exist for 12V DC or 110V AC. * **Power Consumption:** Usually very low (approx. 0.5W to 1.5W) to allow direct driving from a PLC (Programmable Logic Controller) output card. * **Current Draw:** Typically between 20mA and 60mA. ### B. Signal Control The valve is triggered by an electrical pulse. 1. **Energized State:** The coil creates a magnetic field, pulling a plunger to open the air path. 2. **De-energized State:** A spring returns the plunger to its original position, cutting off the flow. ### C. Protection Circuitry Most modern versions (denoted by the "-R" or specific suffixes) include: * **Surge Suppressor:** A diode or varistor to prevent "flyback" voltage spikes that could damage PLC outputs. * **LED Indicator:** A small light-emitting diode to show when the solenoid is receiving power. --- ## 3. Wiring Configuration For the DC versions, the wiring is straightforward: ```yaml Pin 1 (Brown/Red): +24V DC (Signal from PLC) Pin 2 (Blue/Black): 0V (Common/Ground) ``` --- ## 4. Operational Logic The "3" in the part number often refers to a **3-port** configuration: 1. **Port 1 (P):** Compressed air inlet. 2. **Port 2 (V):** Vacuum/Output port connected to the suction cup. 3. **Port 3 (E):** Exhaust port. When the electronic signal is received, the valve shifts to allow air to flow through a venturi nozzle inside the unit, creating a vacuum at Port 2 via the Bernoulli principle. ---