The **TCS-84-R/CE** is a high-performance, rotary-type electronic component, typically categorized as a **Coded Rotary Selector Switch** (or BCD Switch). These parts are widely used in industrial controls, telecommunications, and instrumentation to set digital parameters manually. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | BCD (Binary Coded Decimal) or Hexadecimal | | **Circuit Type** | Complementary / Real Code | | **Mounting Type** | Through-hole (PCB) or Panel Mount | | **Number of Positions** | Usually 10 (0-9) or 16 (0-F) | | **Contact Rating** | Typically 100mA @ 5V DC (Switching) | | **Durability** | ~10,000 to 20,000 steps | | **Operating Temp** | -25°C to +75°C | --- ### 2. Electronic Operating Principle The "CE" suffix often denotes **Complementary Code**. Unlike standard BCD switches where the output pins match the selected digit, a complementary switch provides the inverted logic. #### Logic Example (4-bit BCD): When the dial is set to a number, the internal wipers connect the "Common" pin to specific output pins (1, 2, 4, and 8). ```text Position | Binary (Standard) | Complementary (CE) ------------------------------------------------ 0 | 0000 | 1111 1 | 0001 | 1110 2 | 0010 | 1101 ``` --- ### 3. Component Construction 1. **Rotor:** The manual interface (usually slotted for a screwdriver) that the user turns. 2. **Stator/PCB Base:** Contains the etched gold-plated tracks that determine the output code. 3. **Wiper:** A metal contact that bridges the common terminal to the coded terminals. 4. **Housing:** Often made of heat-resistant plastic (PBT or similar) to withstand wave soldering. --- ### 4. Common Applications * **Address Setting:** Used in RS-485 or CAN bus modules to set the hardware ID of a node. * **Timers/Counters:** Manually setting the threshold or duration in industrial relays. * **Configuration:** Selecting operating modes on a PCB without needing a digital display or software interface. ---