The **F2TS-51-R/K** is a high-performance **solid-state timing relay** (specifically a multi-function twin timer) manufactured by **Fuji Electric**. It is designed for industrial automation systems that require precise control over cycle operations, such as "on-delay" and "off-delay" sequences. --- ### 1. Key Technical Specifications Below is a breakdown of the primary electrical and physical characteristics: | Feature | Specification Details | | :--- | :--- | | **Product Type** | Multi-function Twin Timer | | **Rated Voltage** | 100-240V AC (50/60Hz) / 100-125V DC | | **Output Type** | Relay Contact (SPDT - Single Pole Double Throw) | | **Contact Capacity** | 5A at 250V AC (Resistive Load) | | **Time Range** | 0.1s to 999.9h (Selectable) | | **Mounting Type** | 8-pin plug-in base (Standard DIN rail or panel mount) | | **Display** | 4-digit LCD/LED status indicators | --- ### 2. Functional Characteristics The "Twin Timer" designation means the device can independently control the **ON time (T1)** and the **OFF time (T2)**. This is essential for applications involving repetitive cycles. * **Operation Modes:** * **Flicker ON Start:** The cycle begins with the output relay energized. * **Flicker OFF Start:** The cycle begins with the output relay de-energized. * **Accuracy:** High repetition accuracy (usually within ±0.3%) due to the internal microprocessor-based quartz crystal oscillator. * **Protection:** Equipped with internal surge absorption to protect against electrical noise in industrial environments. --- ### 3. Connection Diagram Logic The device typically follows the standard 8-pin circular socket configuration. ```text Pin 2 & 7: Power Supply Input Pin 1 & 3: Normally Open (NO) Contact Pin 1 & 4: Normally Closed (NC) Contact Pin 8: Common for the second set (if applicable) ``` --- ### 4. Applications This part is commonly found in the following electronic control systems: 1. **Conveyor Belts:** To manage intermittent movement (move for 10s, stop for 5s). 2. **Lubrication Systems:** To trigger automatic oiling at specific intervals. 3. **HVAC Control:** Managing compressor cycle times to prevent short-cycling. 4. **Signal Lights:** Controlling flashing sequences for warning towers.