The **LC2-3C-R/E** is a specific model within a series of electronic control components, typically associated with **liquid level controllers** or **floatless level switches**. These devices are used primarily to manage the water levels in tanks, sumps, or reservoirs by controlling pumps or valves. --- ### 1. Technical Specifications The following table outlines the general technical characteristics of the LC2 series controllers: | Feature | Specification | | :--- | :--- | | **Model Type** | Floatless Level Switch / Relay | | **Operating Voltage** | Usually 110V/220V AC (model dependent) | | **Contact Capacity** | 5A @ 250VAC (Resistive Load) | | **Output Type** | Relay Output (SPDT or DPDT) | | **Sensitivity** | Fixed or Adjustable (depending on sub-variation) | | **Installation** | 8-pin or 11-pin Plug-in socket (PF083A or PF113A) | --- ### 2. Core Components and Functionality The device operates on the principle of electrical conductivity. It uses electrodes (probes) placed in the liquid to complete a circuit. * **Internal Transformer:** Steps down the mains voltage to a low, safe AC voltage for the sensing probes (usually <24V AC to prevent electrolysis). * **Signal Processing Circuit:** Detects the minute current flowing through the liquid when the probes are submerged. * **Output Relay:** When the liquid touches the "High" probe, the relay energizes to stop a pump (filling) or start a pump (draining). When it falls below the "Low" probe, the relay switches state. * **LED Indicators:** * **Power LED:** Indicates the unit is receiving electricity. * **Action LED:** Indicates the status of the output relay. --- ### 3. Application Wiring (Standard Mode) The "3C" designation often refers to a three-electrode system. Below is a conceptual representation of the pin logic: ```markdown Pin 1, 8: Power Supply Input (AC) Pin 2, 3, 4: Relay Contacts (Common, NO, NC) Pin 5: E1 (High Level Probe) Pin 6: E2 (Low Level Probe) Pin 7: E3 (Common/Ground Probe) ``` ### 4. Key Advantages 1. **Solid State Reliability:** Unlike mechanical floats, there are no moving parts in the tank that can get stuck. 2. **Compact Design:** Designed for DIN-rail mounting using standard sockets. 3. **Low Maintenance:** Probes are simple stainless steel rods that require minimal cleaning. ---