The **F2TS-2E-R/K** is a specific model of an **Electronic Thermostat** or **Digital Temperature Controller**, commonly used in industrial refrigeration, HVAC systems, and thermal processing equipment. Below is a detailed breakdown of its electronic components and technical specifications. --- ### 1. Technical Specifications The device acts as the "brain" of a cooling or heating system, processing sensor data to toggle mechanical or solid-state relays. | Feature | Specification | | :--- | :--- | | **Input Voltage** | Typically 220V AC (varies by regional sub-model) | | **Control Type** | ON/OFF Control (Hysteresis-based) | | **Output Type** | Relay Output (Dry contact) | | **Sensor Input** | NTC Thermistor (standard) or K-type Thermocouple | | **Mounting** | Panel Mount (typically 71x29mm cutout) | | **Accuracy** | ±1°C | --- ### 2. Key Electronic Parts & Functionality #### A. The Microcontroller (MCU) The core of the unit is an 8-bit or 16-bit microcontroller. It runs the embedded firmware that: * Converts analog signals from the sensor into digital temperature readings. * Compares the current temperature against the **Set Point (SP)**. * Manages the delay timers (to prevent compressor short-cycling). #### B. The Power Supply Module Since the unit usually connects to mains power (110V/220V AC), it contains an internal **Step-down Transformer** or a **Switching Mode Power Supply (SMPS)** circuit. This converts the high AC voltage into low-voltage DC (5V or 12V) to power the display and the logic gates. #### C. Relay Output (The "Switch") The "R" in the model number often denotes a **Relay** output. * **Capacity:** Usually rated for 10A or 30A. * **Function:** When the MCU determines cooling is needed, it energizes the relay coil, closing the contact to power the compressor or heater. #### D. Display Interface The front panel consists of: * **7-Segment LED Display:** Usually 3 digits to show the temperature. * **Status LEDs:** Indicators for "Cooling," "Heating," "Defrost," or "Alarm." * **Tactile Buttons:** For user input and parameter programming. --- ### 3. Wiring Configuration Most units in this series follow a standard terminal block layout: | Terminal No. | Description | | :--- | :--- | | **1 & 2** | Power Supply Input (L/N) | | **3 & 4** | Temperature Sensor Input | | **5 & 6** | Main Control Output (Relay) | | **7 & 8** | Auxiliary/Alarm Output (Model dependent) | --- ### 4. Typical Applications * **Commercial Refrigeration:** Display cases, walk-in freezers. * **Industrial Ovens:** Low-temperature drying processes. * **Aquariums:** Maintaining precise water temperatures. * **Incubators:** Ensuring stable thermal environments for biological samples.