The **OR2-5-R** refers to a high-performance **High Voltage (HV) Power Supply module**, typically manufactured by companies like **Spellman** or similar specialist industrial electronics providers. These units are designed for precision applications requiring stable, low-ripple high voltage. --- ### 1. Key Technical Specifications The model name generally follows a nomenclature indicating output voltage and power/current. | Feature | Specification (Typical) | | :--- | :--- | | **Output Voltage** | 0 to 2,000 Volts (2kV) | | **Output Power** | 5 Watts | | **Polarity** | Reversible (indicated by the **-R** suffix) | | **Input Voltage** | +24 VDC (Typical for modular types) | | **Regulation** | Line and Load regulation < 0.01% | | **Ripple** | Very Low (< 100mV peak-to-peak) | --- ### 2. Internal Electronic Components The OR2-5-R is a sophisticated DC-to-DC converter. Its internal architecture consists of several critical stages: #### A. Control Circuitry * **Precision Reference:** Uses high-stability Zener diodes or bandgap references to ensure the output remains constant regardless of temperature. * **Error Amplifier:** Compares the actual output voltage (via a feedback divider) with the user-set control voltage. #### B. Power Conversion * **Resonant Oscillator:** To minimize Electromagnetic Interference (EMI) and switching losses, these modules often use a resonant inverter topology. * **Step-up Transformer:** A ferrite-core transformer specifically wound with high-voltage insulation to step up the low-voltage DC input. #### C. High Voltage Multiplier (Cockcroft-Walton) * **Diodes & Capacitors:** A ladder network of high-voltage diodes and ceramic capacitors that rectifies and further multiplies the AC voltage from the transformer into the final DC output. #### D. Protection & Filtering * **Arc/Short Circuit Protection:** Current-limiting resistors and sense circuits that shut down the unit or limit current if a spark (arc) occurs. * **Output Filter:** High-voltage capacitors designed to smooth out any remaining switching noise (ripple). --- ### 3. Pinout and Interface The unit is usually controlled via a multi-pin connector (often a 10-pin or 15-pin header). * **V-Control:** An analog input (0-10V or 0-5V) that scales the output voltage. * **V-Monitor:** A low-voltage output used to measure the actual high voltage via a multimeter or PLC. * **I-Monitor:** Provides a signal proportional to the current being drawn. * **Enable/Inhibit:** A digital input to turn the high voltage output ON or OFF safely. --- ### 4. Common Applications Due to its high stability and low ripple, the OR2-5-R is commonly found in: 1. **Photomultiplier Tubes (PMT):** Sensitive light detection in lab equipment. 2. **Mass Spectrometry:** Precise ion acceleration. 3. **Proportional Counters:** Used in radiation detection. 4. **Electrostatics:** Precision charging or separation processes.