Based on your request, here is the technical breakdown of the **47DM-1123-R**. This part number corresponds to a specific **Rotary Dip Switch** manufactured by **Grayhill** (or potentially a licensed secondary source), typically used for setting binary or hexadecimal values on a circuit board. --- ### ## Technical Specifications The following table outlines the core electrical and physical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary DIP Switch | | **Actuator Style** | Flush / Screwdriver Slot | | **Circuit Type** | BCD (Binary Coded Decimal) | | **Number of Positions** | 10 Positions (0-9) | | **Mounting Type** | Surface Mount (SMT) / Gull-wing | | **Contact Rating** | 100mA @ 5V DC (Switching) / 100mA @ 50V DC (Non-switching) | | **Operating Temperature** | -40°C to +85°C | | **Process Sealed** | Yes (Typically includes a tape seal for washing) | --- ### ## Functional Overview The **47DM-1123-R** serves as a hardware configuration interface. Instead of using multiple toggle switches, this single rotary component allows a user to select one of ten output states using a small flat-head screwdriver. #### ### BCD Output Logic Because this is a **BCD (Binary Coded Decimal)** switch, the 10 positions correspond to the following binary outputs across 4 pins (1, 2, 4, and 8): * **Position 0:** All pins Open (Low) * **Position 1:** Pin 1 Closed (High) * **Position 9:** Pins 1 and 8 Closed (High) --- ### ## Key Features & Applications * **Space Efficiency:** The "DM" series is designed for ultra-compact PCBs where vertical space is limited. * **Durability:** The contacts are usually gold-plated to ensure low resistance and prevent oxidation over a long service life. * **Applications:** * Setting Unit IDs in networked devices. * Selecting communication channels on RF modules. * Hard-coding configuration settings that shouldn't be changed by the end-user (internal board settings). --- ### ## Usage Example (C++ Pseudo-code) If you are reading the state of this switch using a microcontroller, you might treat the 4 pins as a single nibble: ```cpp int readRotarySwitch() { int val = 0; if (digitalRead(PIN_8) == HIGH) val += 8; if (digitalRead(PIN_4) == HIGH) val += 4; if (digitalRead(PIN_2) == HIGH) val += 2; if (digitalRead(PIN_1) == HIGH) val += 1; return val; // Returns a value between 0-9 } ```