## Overview of W2SP-1B4-R2/CE The **W2SP-1B4-R2/CE** is a specialized industrial signal conditioner, specifically a **Transmitter for Strain Gauge (Bridge) Sensors**. Manufactured by M-System (a leader in interface technology), this device converts low-level millivolt signals from strain gauges or load cells into standard high-level industrial DC signals. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Input Type** | Strain Gauge (Bridge) Sensors | | **Output Channels** | 2 Independent Outputs | | **Excitation Voltage** | 2V or 10V DC (Selectable) | | **Power Supply** | 100V – 240V AC | | **Isolation** | 2000V AC (Input to Output to Power) | | **Mounting** | DIN Rail Mounting | | **Response Time** | ≤ 0.5 seconds (0 - 90%) | --- ### 2. Major Electronic Components & Functions The internal circuitry is divided into four primary stages to ensure signal integrity and industrial safety: #### A. Signal Input & Bridge Excitation The device provides a stable **Excitation Voltage** to the strain gauge. Since strain gauges change resistance based on physical stress, a precise voltage source is required to detect the resulting voltage bridge imbalance. #### B. Amplification & Conditioning * **High-Gain Instrumentation Amp:** Strain gauge signals are extremely small (often 0-2mV/V). The electronic front-end uses high-precision operational amplifiers to scale this to a usable level. * **Zero/Span Adjustments:** Accessible potentiometers on the front allow for field calibration to account for "tare" weight or sensor drift. #### C. Galvanic Isolation To prevent ground loops and protect PLC/DCS equipment from high-voltage surges, the R2/CE series uses **Transformer Isolation**. The "CE" suffix confirms it meets European safety and electromagnetic compatibility standards. #### D. Dual Output Stage The "1B4" designation typically refers to the output configuration: * **Output 1:** Often a current signal (4–20mA). * **Output 2:** Often a voltage signal (1–5V DC or 0–10V DC). * *Note: These are isolated from each other.* --- ### 3. Connection Diagram (General Layout) ```text [ Strain Gauge ] -----> [ W2SP-1B4-R2/CE ] -----> [ Output 1: PLC ] (Input) (Conditioner) -----> [ Output 2: Display ] | [ 100-240V AC Power ] ``` --- ### 4. Application Use Cases 1. **Weight Measurement:** Converting load cell signals from silos or scales into 4-20mA for a PLC. 2. **Pressure Monitoring:** Using diaphragm-based strain gauges to monitor hydraulic pressure. 3. **Structural Health:** Measuring the tiny deformations in steel beams or bridges.