The **SVB-ZD-R/K** is a specialized electronic control module primarily used in industrial automation, specifically within **centralized lubrication systems** and **grease pump control**. It acts as the "brain" that regulates the timing and frequency of lubrication cycles. --- ### 1. Technical Specifications Overview The electronic components within the SVB-ZD-R/K are designed for durability in harsh industrial environments. | Feature | Specification | | :--- | :--- | | **Input Voltage** | Typically 24V DC or 220V AC (model dependent) | | **Timing Range** | Adjustable (Interval time and Operating time) | | **Enclosure Rating** | IP54 / IP65 (Dust and splash proof) | | **Output Type** | Relay Output (Contact capacity ~5A) | | **Control Logic** | Microprocessor-based (MCU) | --- ### 2. Key Electronic Components & Their Functions #### A. Microcontroller (MCU) The core logic unit that handles the timing cycles. It calculates the "Off-Time" (interval between lubrication pulses) and "On-Time" (duration the pump runs). It ensures high precision compared to old mechanical timers. #### B. Potentiometers (Adjustment Knobs) * **R-Value (Interval):** Usually controls the rest time between cycles. * **K-Value (Work):** Controls the duration of the pump operation. * These are high-precision variable resistors that provide analog input to the MCU. #### C. Relay Output Because the pump motor requires higher current than the logic board can provide, an internal electromagnetic relay is used to switch the power to the motor on and off. #### D. LED Indicators The front panel typically features diagnostic LEDs: * **Power (Green):** Indicates the module is energized. * **Work/Run (Red/Yellow):** Indicates the pump is currently active. * **Alarm (Optional):** Indicates a pressure failure or low fluid level. --- ### 3. Wiring Configuration The module generally uses a terminal block for easy integration. Below is a generic logic representation of the wiring: ```markdown Terminal 1: Power Input (+) / L Terminal 2: Power Input (-) / N Terminal 3: Output to Pump Motor Terminal 4: Common/Neutral for Pump Terminal 5: Signal Input (e.g., Pressure Switch/Level Sensor) ``` --- ### 4. Operating Principle 1. **Power On:** The MCU initializes and reads the positions of the R/K potentiometers. 2. **Interval Cycle:** The timer counts down the "Rest Time." 3. **Action Cycle:** Once the timer hits zero, the internal relay closes, sending power to the pump. 4. **Monitoring:** If the module has an "R" (Reset/Feedback) capability, it waits for a pressure switch signal to confirm grease has reached the end of the line before ending the cycle.