The **FCR-3B-R** is a high-precision digital temperature controller manufactured by **Shinko Technos**. It is designed for industrial applications requiring stable PID control, compact DIN rail mounting, and versatile input/output options. --- ## 1. Core Electronic Components and Architecture The device is built on a modular electronic architecture that separates high-power switching from sensitive signal processing. | Component Group | Functionality | Key Specifications | |:---|:---|:---| | **CPU / Microprocessor** | Main logic, PID calculations, and fuzzy logic control. | High-speed processing for 0.25s sampling cycles. | | **Input Stage** | Signal conditioning for sensors. | Multi-input (Thermocouple, RTD, DC Voltage/Current). | | **A/D Converter** | Converts analog sensor data to digital signals. | High resolution (18-bit internal) for ±0.2% accuracy. | | **Display Panel** | Human-Machine Interface (HMI). | 4-digit, 7-segment LED (Process/Set values). | | **Isolation Circuit** | Protects internal logic from power surges. | Photo-coupler isolation between input, power, and output. | --- ## 2. Input and Output (I/O) Electronics The FCR-3B-R is highly configurable depending on the specific model suffix. ### A. Sensor Inputs The electronic front-end is universal, meaning it can handle various signal types via software selection: * **Thermocouples:** K, J, R, S, B, E, T, N, etc. * **RTDs:** Pt100, JPt100 (3-wire system). * **Analog:** 0-5V DC, 1-5V DC, 0-20mA, or 4-20mA. ### B. Control Output Options Depending on the specific variant (indicated by the "R" or other suffixes), the output electronics change: 1. **Relay Contact (R):** Uses a mechanical electromagnetic relay. (250V AC, 3A). 2. **SSR Drive (S):** Provides a 12V DC voltage pulse to trigger an external Solid State Relay. 3. **Current Output (A):** Provides a 4-20mA DC signal for proportional valve control or power regulators. --- ## 3. Communication and Integration Features The "FCR" series often includes secondary electronic boards for networking: * **RS-485 Interface:** Uses the Modbus RTU or Shinko protocol for PLC integration. * **Event Inputs/Outputs:** Small signal relays or open-collector transistors used for high/low temperature alarms or heater burnout detection. --- ## 4. Technical Summary Table | Feature | Specification | |:---|:---| | **Power Supply** | 100V to 240V AC (Standard) or 24V AC/DC (Optional) | | **Power Consumption** | Approx. 8VA | | **Sampling Cycle** | 0.25 seconds | | **Mounting** | 35mm DIN Rail Mount | | **Operating Temp** | 0 to 50°C (32 to 122°F) | --- ## 5. Typical Wiring Diagram Layout ```text [ Power Supply ] [ Sensor Input ] [ Control Output ] (1)---(L) (7)---(+) (10)---(NO) (2)---(N) (8)---(-) (11)---(COM) (9)---(B') ``` *(Note: Terminals vary by specific sub-model; always refer to the label on the side of the unit casing.)*