The **TCS-7D-R** refers to a high-precision, low-profile **Electronic Load Cell** typically used in industrial weighing scales, platform scales, and hopper systems. It is an electromechanical sensor that converts mechanical force (weight) into a measurable electrical signal. --- ### 1. Core Technical Specifications The following table outlines the typical electronic parameters found in sensors of this series: | Parameter | Specification (Typical) | | :--- | :--- | | **Rated Capacity** | 50kg, 100kg, 200kg, 500kg (Model dependent) | | **Sensitivity (Rated Output)** | 2.0 ± 0.1 mV/V | | **Input Resistance** | 350 ~ 450 Ω | | **Output Resistance** | 350 ± 5 Ω | | **Excitation Voltage** | 5V - 12V DC (Maximum 15V) | | **Insulation Resistance** | ≥ 5000 MΩ (at 50V DC) | | **Compensated Temp Range** | -10°C to +40°C | --- ### 2. Electronic Operating Principle The TCS-7D-R operates using a **Wheatstone Bridge** circuit configuration. 1. **Strain Gauges:** Inside the aluminum or alloy steel body, four strain gauges are bonded to the structural element. 2. **Resistance Change:** When weight is applied, the metal body deforms slightly, causing the strain gauges to stretch or compress, which changes their electrical resistance. 3. **Output Signal:** This change in resistance creates a differential voltage (millivolts) proportional to the load applied. --- ### 3. Wiring Configuration Most TCS-7D-R units utilize a 4-wire color-coded system. Proper connection to the Analog-to-Digital Converter (ADC) or Indicator is crucial: * **Red:** Excitation + (Input Power) * **Black:** Excitation - (Ground) * **Green:** Signal + (Positive Output) * **White:** Signal - (Negative Output) * **Shield:** Earth/Grounding (Reduces electromagnetic interference) --- ### 4. Integration Requirements To use this electronic part in a system (like an Arduino or industrial PLC), the following components are usually required: * **HX711 or Similar ADC:** Because the output signal is in millivolts (mV), a high-resolution 24-bit Analog-to-Digital converter is needed to amplify and digitize the signal. * **Calibration:** The software must use a "calibration factor" to map the raw digital output back to units of weight (grams, kilograms, or pounds). * **Stabilization:** Capacitors are often added to the power supply lines to filter out noise that might cause weight fluctuations.