## Overview of RTS-2DD-R/E The **RTS-2DD-R/E** is a specific model of a **Rotary Torque Sensor** (often associated with manufacturers like ETH Messtechnik or similar industrial sensor providers). This device is designed to measure dynamic torque in rotating shafts. --- ### Key Electronic Components and Specifications The device operates using a combination of strain gauge technology and non-contact signal transmission to convert mechanical torsion into an electrical signal. | Feature | Specification / Component Type | | :--- | :--- | | **Sensing Element** | Foil Strain Gauges (Wheatstone Bridge configuration) | | **Signal Transmission** | Non-contact (Inductive or Infrared) transformer | | **Supply Voltage** | Typically 12V to 28V DC | | **Output Signal** | ±5V, ±10V, or 10kHz ± 5kHz (Frequency output) | | **Accuracy Class** | 0.1% to 0.2% | | **Connection Type** | Multi-pin industrial plug (e.g., 12-pin Binder) | --- ### Internal Electronic Architecture 1. **Wheatstone Bridge:** The core sensing unit consists of four strain gauges bonded to the internal torsion bar. As the shaft twists, the resistance changes, creating a differential voltage. 2. **Rotor Electronics:** Since the shaft rotates, the electronics on the rotor include a miniature amplifier and an A/D converter (in digital models) or a frequency modulator. 3. **Inductive Coupler:** Instead of slip rings (which wear out), the RTS-2DD-R/E uses **inductive coupling**. This acts like a rotating transformer, transferring power *into* the rotating shaft and sending data *out* from it without physical contact. 4. **Stator Signal Processing:** The stationary housing contains the demodulator circuit which cleans the signal and converts it into a standard industrial voltage or frequency output for a PLC or Data Acquisition (DAQ) system. --- ### Pinout and Wiring (General Industrial Standard) While you should always consult the specific datasheet for your serial number, the standard 12-pin electronic interface typically follows this logic: ```text Pin A: Supply (+) 12-28VDC Pin B: Supply (GND) 0V Pin C: Measurement Signal (+) Pin D: Measurement Signal (GND) Pin E: Calibration Check (Shunt Trigger) ``` --- ### Maintenance of Electronic Parts * **Non-Contact Advantage:** Because it uses inductive transmission, there are no brushes to replace. * **Calibration:** The "E" in the suffix often denotes an integrated **shunt calibration** resistor, allowing the user to verify the electronic scaling without applying a physical load.