The **BSE61-RK** refers to a specific repair kit (RK) or replacement assembly for an actuator, typically used in heating, ventilation, and air conditioning (HVAC) systems. This kit is designed to maintain or repair the electronic and mechanical drive of the valve actuator. --- ### 1. Core Electronic Components The electronics within the BSE61-RK are responsible for signal processing, motor control, and position feedback. | Component | Description | Function | | :--- | :--- | :--- | | **Microprocessor** | The central logic board. | Processes input signals (0-10V or 4-20mA) and calculates motor movement. | | **DC Brushless Motor** | The primary drive unit. | Provides the torque required to move the valve stem or damper. | | **Potentiometer** | Variable resistor/Position sensor. | Sends real-time feedback to the controller regarding the actual position of the actuator. | | **Terminal Block** | Wiring interface. | Points of connection for power (usually 24V AC/DC) and control signals. | | **DIP Switches** | Small manual switches. | Used to configure the direction of rotation (DA/RA) and signal type. | --- ### 2. Technical Specifications Most units in this series share the following electronic parameters: * **Supply Voltage:** 24V AC/DC (±20%). * **Control Signal:** Proportional (Modulating) 0...10 V DC or 4...20 mA. * **Feedback Signal:** 0...10 V DC (Output for monitoring). * **Power Consumption:** * *Running:* ~5-8 VA * *Holding:* ~1-3 VA --- ### 3. Electronic Features The electronic board in the BSE61-RK includes several protection and optimization features: 1. **Electronic Stroke Adjustment:** Automatically calibrates the start and end positions to match the valve's physical travel. 2. **Overload Protection:** If the valve is jammed, the electronics detect the spike in current and cut power to the motor to prevent burnout. 3. **Signal Fail-Safe:** Can be configured to remain in its current position or return to a "zero" position if the control signal is lost. --- ### 4. Wiring Diagram (Simplified) ```text [ Terminal ] [ Function ] 1 -------- System Neutral (G0) 2 -------- 24V AC/DC Power (G) 3 -------- Control Signal In (0-10V) 4 -------- Feedback Signal Out (0-10V) ``` ---