The **PULS CP20.241-R3** is a high-end, DIN-rail mountable industrial power supply designed for critical infrastructure. It belongs to the DIMENSION CP-series and features an integrated **decoupling MOSFET** for N+1 redundancy applications. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the CP20.241-R3: | Feature | Specification | | :--- | :--- | | **Input Voltage (AC)** | AC 100-240V (-15%/+10%) | | **Input Voltage (DC)** | DC 110-150V (±20%) | | **Output Voltage** | DC 24V (Adjustable 24-28V) | | **Output Current** | 20A (at 24V), 17.1A (at 28V) | | **Output Power** | 480W | | **Efficiency** | 95.2% | | **MTBF** | > 500,000 hours (at 40°C) | | **Dimensions** | 48 x 124 x 127mm (W x H x D) | --- ### 2. Specialized Electronic Features #### A. Integrated Redundancy (Built-in MOSFET) Unlike standard power supplies that require an external diode or redundancy module (like a YR40.241), the **-R3** variant includes an internal decoupling MOSFET. - **Benefit:** This reduces power losses by up to 85% compared to traditional diode solutions. - **Function:** It prevents a short circuit on the output of one power supply from affecting the shared DC bus in a redundant system. #### B. Power Reserves (BonusPower) The electronics are designed to handle transient loads without voltage drops: - **Extra Power:** Provides 600W (25A at 24V) for up to 5 seconds. - **Short-circuit Current:** Can deliver a high peak current to trip downstream circuit breakers effectively. #### C. Power Factor Correction (PFC) The unit employs an active PFC circuit that ensures: - A power factor close to **0.99**. - Low input harmonic distortion, meeting **EN 61000-3-2** standards. #### D. DC-OK Relay Contact A floating relay contact is integrated into the circuitry to monitor the output voltage. - **Logic:** The contact is closed when the output voltage is > 90% of the adjusted value. - **Usage:** Essential for PLC status monitoring in automated environments. --- ### 3. Protection Mechanisms The internal electronic control system protects the unit against several fault conditions: 1. **Over-temperature Protection:** Automatic shut-down with self-recovery. 2. **Over-voltage Protection (OVP):** Limits output to < 32V in case of internal failure. 3. **Transient Protection:** Includes a Varistor (MOV) and gas discharge tube for input surges. 4. **Load Protection:** Electronically limited current to prevent wire overheating during a fault. --- ### 4. Terminal Configuration | Terminal | Function | Description | | :--- | :--- | :--- | | **L, N, PE** | Input | AC Line, Neutral, and Protective Earth | | **+, -** | Output | Dual terminals for easy wiring of 24V DC | | **13, 14** | DC-OK | Relays contacts for remote signaling |